68 results on '"Cottidae"'
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2. Distribution, Size and Sex Composition of Gymnocanthus pistilliger (Cottidae) off the Western Coast of Kamchatka in the Summer Period and Modern State of its Resources
- Author
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V. V. Panchenko, A. A. Balanov, and A. A. Matveev
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0106 biological sciences ,Biomass (ecology) ,biology ,Trawling ,Range (biology) ,010604 marine biology & hydrobiology ,04 agricultural and veterinary sciences ,Aquatic Science ,Cottidae ,biology.organism_classification ,01 natural sciences ,Oceanography ,Abundance (ecology) ,040102 fisheries ,Period (geology) ,0401 agriculture, forestry, and fisheries ,Sculpin ,Environmental science ,Bathymetry ,General Agricultural and Biological Sciences - Abstract
In the summer period of 2017, the threaded sculpin Gymnocanthus pistilliger occurred at depths from 14 (minimum depth of trawling) to 64 m in the Sea of Okhotsk off the western coast of Kamchatka. Areas of the maximum G. pistilliger concentrations are only partially similar in terms of fish mass and abundance. The maximum average catches in terms of biomass were recoded between 55° and 56° N, where a high abundance of the species was also recorded. The maximum average catches in terms of abundance were obtained southerly, between 53° and 54° N. The species is the most common and abundant to the depths of 40−50 m. The length of specimens varies within 6−26 (on average 18.3) cm. The ratio of males to females is 0.4 : 1. The smallest sizes of specimens of both sexes were recorded in the depth range of 14−20 m; the average sizes of males and females increase with depth. In the summer period, G. pistilliger occurs in a wide temperature range between 0.4 and 12.1°С on the West Kamchatka shelf. The highest catches of the species were recorded at the temperature of 1.0−3.5°С in the main part of the bathymetric interval, and at 3.5−6.0°С in a shallow zone. According to the results of summer surveys off the western coast of Kamchatka the estimated abundance of G. pistilliger was 146 million ind., and the biomass was 11200 t. more...
- Published
- 2021
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3. Distribution and Some Traits of Biology of Sculpins of Genus Triglops (Cottidae) in the Sea of Japan
- Author
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V. V. Panchenko, A. I. Galeev, M. I. Boyko, and O. I. Pushchina
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0106 biological sciences ,Biomass (ecology) ,biology ,Range (biology) ,010604 marine biology & hydrobiology ,04 agricultural and veterinary sciences ,Aquatic Science ,Triglops ,biology.organism_classification ,Cottidae ,01 natural sciences ,Fishery ,Genus ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Sculpin ,Ribbed sculpin ,General Agricultural and Biological Sciences ,Planktivore - Abstract
It was revealed that the southern border of the range of spectacled sculpin Triglops scepticus runs in the region of 37°23′ N. It has been confirmed that the southern border of the range of Jordan’s sculpin T. jordani is located in the South Korean waters; of ribbed sculpin T. pingelii range, in the North Korean waters. In the Russian waters of the Sea of Japan, Jordan’s sculpin occurs at depths of 14–230 m and water temperature of –1–13.8°C; ribbed sculpin, 30–424 m and –0.3–9.7°C; spectacled sculpin, 57–586 m and 0.3–4.3°C, respectively. In the warm period, the concentrations are somewhat shifted towards shallow waters; in the cold period, towards deep waters. The body length and weight of one-sized individuals increase with the degree of deep-water preference. The body length of Jordan’s sculpin reaches 20 cm; of ribbed sculpin, 23 cm; of spectacled sculpin, 26 cm. In all three species, females are larger than males. Females dominate populations of Jordan’s and ribbed sculpins while in spectacled sculpin the share of males is higher. In the northwestern part of the Sea of Japan spectacled and ribbed sculpins are planktivores consuming mainly hyperiids and euphasiids while Jordan’s sculpin is nectobenthivore with food dominated by mysids and small shrimps. During the spring—summer period mean values of daily rations of adult specimens of Jordan’s, ribbed and spectacled sculpins are 3.3, 2.4 and 1.8% of body weight, respectively. The biomass of g. Triglops species in the Russian zone of the Sea of Japan is about 2100 tonnes. more...
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- 2021
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4. Karyological and Molecular Genetic Divergence of Sculpins Myoxocephalus Gill, 1859 (Cottidae)
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I. N. Moreva, A. V. Petrovskaya, and O. A. Radchenko
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0106 biological sciences ,0303 health sciences ,Myoxocephalus ,biology ,Zoology ,biology.organism_classification ,Cottidae ,01 natural sciences ,Molecular analysis ,Divergence ,Genetic divergence ,03 medical and health sciences ,Genus ,Genetics ,Megalocottus platycephalus ,Phylogenetic relationship ,030304 developmental biology ,010606 plant biology & botany - Abstract
Karyological and molecular genetic study of the sculpins of the genus Myoxocephalus is conducted. Molecular genetic analysis demonstrates that the genus is heterogeneous in the contemporary composition and is divided into Pacific and Arctic-Atlantic groups. In the Pacific group, a close phylogenetic relationship is found between the species M. stelleri, M. polyacanthocephalus, and M. jaok. The representative of the Arctic-Atlantic group, M. quadricornis, is monotypic and sister to Megalocottus platycephalus. Close relations of M. scorpius and the sculpins of the Pacific group are revealed on the basis of the molecular genetic and karyological data. Analysis of M. brandtii, M. ochotensis, and M. jaok from different parts of their habitats shows the absence of karyological variability. The degree and direction of the divergence of the karyotypes in Pacific species M. brandtii, M. ochotensis, M. jaok, M. polyacanthocephalus, M. stelleri, and M. scorpius are established. more...
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- 2020
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5. Seasonal Distribution of Threaded Sculpin Gymnocanthus pistilliger (Cottidae) in Russian Waters of the Sea of Japan
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V. V. Panchenko, L. L. Panchenko, and A. A. Matveev
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geography ,education.field_of_study ,geography.geographical_feature_category ,biology ,Range (biology) ,Population ,Aquatic Science ,biology.organism_classification ,Cottidae ,Oceanography ,Spring (hydrology) ,Sculpin ,General Agricultural and Biological Sciences ,education ,Bay ,Geology ,Sex ratio ,Gymnocanthus pistilliger - Abstract
In Russian waters of the Sea of Japan, the threaded sculpin Gymnocanthus pistilliger occurs at depths of 5 to 217 m and water temperature in the near bottom layer from –1.4 to +18.7°С in the spring–autumn season. In spring, it migrates from the outer border of the shelf towards its heated middle and upper parts where it forms feeding aggregations in summer and prespawning aggregations in autumn. The largest concentrations are observed in Peter the Great Bay, while the smallest ones in the northern part of Tatar Strait. In summer, juveniles stay in a heated shallow zone that is avoided by adults. As the water temperature starts to get cooler in autumn, small-sized fishes move to deeper layers and spawners penetrate into shallow areas. Only adult fishes live at the maximum depths during all seasons. G. pistilliger reaches a larger size (33 cm) in waters of the Sea of Japan than in the northern part of its range. Females reaching larger sizes than males prevail in the population. In summer, the sex ratio is even at relatively small depths; the proportion of females gradually increases with depth. more...
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- 2020
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6. Age Dynamics of Helminth Fauna in Longfin Baikal Sculpin Cottocomephorus inermis (Cottidae)
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D. R. Baldanova, T. R. Khamnueva, V. V. Konovalova, M. Ts. Tsyrendylykova, and Zh. N. Dugarov
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Longfin ,biology ,Cottocomephorus inermis ,Fauna ,parasitic diseases ,Zoology ,Sculpin ,Helminths ,Aquatic Science ,General Agricultural and Biological Sciences ,biology.organism_classification ,Cottidae ,Bay - Abstract
This is the first report on the infection of longfin Baikal sculpin Cottocomephorus inermis of Barguzinsky Bay (Lake Baikal) by helminths. A total of eight species of parasites belonging to five classes have been identified. The differences in the composition of the helminth fauna of longfin Baikal sculpin of different ages have been revealed. more...
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- 2020
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7. The Karyotype of the Brightbelly Sculpin Microcottus sellaris (Gilbert, 1896) (Cottidae: Myoxocephalinae)
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I. N. Moreva
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0106 biological sciences ,Microcottus ,Myoxocephalus ,biology ,010604 marine biology & hydrobiology ,Zoology ,Chromosome ,Karyotype ,04 agricultural and veterinary sciences ,Aquatic Science ,Oceanography ,biology.organism_classification ,Cottidae ,01 natural sciences ,Genus ,Centromere ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Brightbelly sculpin - Abstract
The karyotype of the brightbelly sculpin Microcottus sellaris (Gilbert, 1896) (family Cottidae) from the Sea of Japan and Sea of Okhotsk has been studied for the first time. The karyotype is stable; it includes 42 chromosomes (2 metacentric, 2 submetacentric, 32 subtelocentric, and 6 acrocentric chromosomes); the number of chromosome arms is 46. A comparative analysis of the basic karyotype traits was carried out for M. sellaris and for the Far Eastern species of the genus Myoxocephalus (M. stelleri from the Sea of Japan and Sea of Okhotsk, M. brandtii, M. jaok, M. ochotensis, and M.polyacanthocephalus). The traits that allow differentiation of M. sellaris from species of the genus Myoxocephalus, as well as the common traits indicating their relationship, are identified. more...
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- 2020
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8. Species Composition and Distribution of Benthic Fishes in the Elittoral of the Northwestern Part of the Sea of Okhotsk in Summer
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V. S. Danilov, P. A. Saveliev, E. A. Metelyov, and A. S. Sergeev
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0106 biological sciences ,biology ,Range (biology) ,010604 marine biology & hydrobiology ,Fauna ,04 agricultural and veterinary sciences ,Ecotone ,Aquatic Science ,Pleuronectidae ,biology.organism_classification ,Cottidae ,01 natural sciences ,Bathyal zone ,Oceanography ,Benthic zone ,Abundance (ecology) ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,General Agricultural and Biological Sciences ,Geology - Abstract
Based on the materials of the trawl survey conducted at depths of 81–301 m in the northwestern part of the Sea of Okhotsk in August–September 2013, the species composition and characteristics of bottom shelf fish’s distribution are described. On the shelf, 69 species were recorded, including 54 species from 11 families, among which Zoarcidae (19 species), Liparidae (17), Cottidae (7), Pleuronectidae (7), and Cyclopteridae (5) dominate in terms of the number of species and abundance. Two groups of fish were identified on the shelf: one is made up of species that prefer extremely low temperatures of the western Sea of Okhotsk cold lens (below –1°C), and some of them are found only within it’s range; the other includes the species that avoid it. The boundary between shelf and bathyal ichthyocenes passes through an isobath of 200 m. Depths of 150–250 m are populated by an ecotone community, in which a sharp transition from shelf to bathyal ichthyocene is observed. more...
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- 2019
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9. Distribution and Some Biological Features of Antlered Sculpin Enophrys diceraus (Cottidae) in Russian Waters of the Sea of Japan
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V. V. Panchenko and O. I. Pushchina
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0106 biological sciences ,biology ,010604 marine biology & hydrobiology ,Enophrys diceraus ,04 agricultural and veterinary sciences ,Aquatic Science ,Seasonality ,Cottidae ,biology.organism_classification ,medicine.disease ,Body weight ,01 natural sciences ,Fishery ,Geography ,Food supply ,040102 fisheries ,medicine ,Antlered sculpin ,0401 agriculture, forestry, and fisheries ,Maximum size ,General Agricultural and Biological Sciences ,Bay - Abstract
In Russian waters of the Sea of Japan, antlered sculpin Enophrys diceraus occurs throughout the year at depths of 4–605 m and temperature of –1.4 to +16.8°C. It is concentrated in the range of depths 30–90 m at 7.3–2.1°C in summer and 200–380 m in winter at stable low-positive temperature. Its spawning migrations in autumn and feeding migrations in spring are directed towards the coast. The main aggregations are formed in the south (Peter the Great Bay) and in central regions off the continental coast and in the southern part of Sakhalin off the insular coast. It does not form aggregations in the northern part of Tatar Strait. Antlered sculpin reaches a larger size (length of 38 cm and weight of over 1 kg) in the Sea of Japan than in northern seas. The maximum size is inherent in males. In the northwestern part of the Sea of Japan, antlered sculpin is a benthophage–polyphage: juveniles feed mainly on bivalve mollusks, amphipods, and polychaetes and adult individuals generally eat echinoderms (mainly brittle stars) and mollusks. The revealed regional and seasonal variation in the food composition is presumably determined by the food supply features. In April to August, the daily ration of the fish with a length of 11–30 cm is 1.1% of the body weight and decreases from 2.6 to 0.9% with its growth. The biomass of antlered sculpin in Russian waters of the Sea of Japan has varied from 5000 to 7000 t in recent years. The bulk of its stock is concentrated off the continental coast. more...
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- 2019
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10. Hooked-Horn Sculpins (Pisces: Cottidae, Artediellinae) from the Miocene of Sakhalin Island, Russia
- Author
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Mikhail V. Nazarkin
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Subfamily ,Body proportions ,biology ,Horn (anatomy) ,Fish fin ,Paleontology ,Zoology ,Cottidae ,biology.organism_classification - Abstract
Two new species of the recent genera of hooked-horn sculpins (Pisces, Cottidae, Artediellinae) are described from Miocene deposits (Serravalian–Tortonian) of the Agnevo Formation, Sakhalin Island, Russia. This is the first record of fossil skeletal remains of members of the subfamily Artediellinae. The Miocene hooked-horn sculpins are similar to modern fishes of this subfamily in the main countable characters and body proportions, but differ in a number of primitive features, such as the presence of skin spinules, covering the body up to the caudal fin base, and the presence of spines on the posterior edge of the lateral line scales. more...
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- 2019
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11. Karyological and Molecular Genetic Differentiation of Fringed Sculpins of the Genus Porocottus Gill, 1859 (Cottidae: Myoxocephalinae)
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I. N. Moreva, O. A. Radchenko, and A. V. Petrovskaya
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0106 biological sciences ,Mitochondrial DNA ,010604 marine biology & hydrobiology ,Karyotype ,04 agricultural and veterinary sciences ,Aquatic Science ,Biology ,Oceanography ,biology.organism_classification ,Cottidae ,01 natural sciences ,Genetic differentiation ,Genus ,Porocottus ,Evolutionary biology ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Identification (biology) - Abstract
Karyological and molecular genetic research on fringed sculpins of the genus Porocottus has been conducted for the first time. Karyotypes of P. japonicus (2n = 42, NF = 42), P. allisi, and P. minutus (2n = 40, NF = 42) have been studied. An analysis of mitochondrial DNA shows high levels of species differentiation, as well as significant distinctions of P. camtschaticus from P. minutus and P. japonicus. On the basis of a comprehensive study, the characters that allow reliable identification of P. japonicus, P. allisi, P. minutus, and P. camtschaticus have been found. more...
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- 2019
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12. Okhotsk Sea Fringed Sculpin Porocottus minutus (Cottidae) from Tauisk Bay of the Sea of Okhotsk
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E. A. Poezzhalova-Chegodaeva
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Oceanography ,biology ,Porocottus ,Fringed sculpin ,Aquatic Science ,General Agricultural and Biological Sciences ,Cottidae ,biology.organism_classification ,Bay ,Geology ,Meristics - Abstract
Plastic and meristic characters, position of teeth on jaws, and coloration of Okhotsk Sea fringed sculpin Porocottus minutus endemic to the north part of the Sea of Okhotsk are described.
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- 2019
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13. Molecular-Genetic Differentiation of the Belligerent Sculpin Megalocottus platycephalus (Pallas, 1814) (Scorpaeniformes: Cottidae)
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O. A. Radchenko and A. V. Petrovskaya
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0106 biological sciences ,Mitochondrial DNA ,biology ,010604 marine biology & hydrobiology ,Scorpaeniformes ,Belligerent ,Zoology ,Platycephalus ,04 agricultural and veterinary sciences ,Aquatic Science ,Subspecies ,Oceanography ,biology.organism_classification ,Cottidae ,01 natural sciences ,Intraspecific competition ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Sculpin - Abstract
A comparative molecular-genetic study of the belligerent sculpin Megalocottus platycephalus (Pallas, 1814) from the Sea of Japan and the Sea of Okhotsk has been carried out for the first time. The heterogeneity of the species, which was established based on an analysis of nucleotide sequences of mitochondrial DNA genes, is associated with its geographical distribution. It has been shown that the samples of M. platycephalus from the different seas form separate groups, whose differentiation does not exceed the intraspecific variation. The studied geographical groups of the belligerent sculpin are assumed to belong to the southern M. platycephalus taeniopterus (Kner, 1868) and northern M. platycephalus platycephalus (Pallas, 1814) subspecies. more...
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- 2019
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14. Diagnostics of Gymnocanthus pistilliger (Pallas, 1814) and G. galeatus Bean, 1881 (Scorpaeniformes: Cottidae) in their Cohabitation Areas
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A. A. Balanov and A. A. Matveev
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0106 biological sciences ,010604 marine biology & hydrobiology ,Scorpaeniformes ,04 agricultural and veterinary sciences ,Anatomy ,Aquatic Science ,Biology ,Oceanography ,Cottidae ,biology.organism_classification ,01 natural sciences ,Spine (zoology) ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Gymnocanthus pistilliger - Abstract
Sex-independent characters for identification of Gymnocanthus pistilliger and G. galeatus in their cohabitation areas were revealed: the presence, position, and arrangement of rough bony plates on the interorbital space, as well as the total spine and ray count for all fins (dorsals and anal; doubled number of rays in pectoral). The interorbital space of G. galeatus is completely covered by bony plates; the spine and ray count for all fins is 82−89. In G. pistilliger, the interorbital space is naked (26%) or has only a few bony plates that never extend onto the rim of the orbit; the spine and ray count for all fins is 74−81. In the eastern part of the Sea of Okhotsk, G. galeatus is not common and perhaps might be found here only occasionally. more...
- Published
- 2018
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15. Distribution and Some Features of Biology of Gilbert’s Irish Lord Hemilepidotus gilberti (Cottidae) in the Russian Waters of the Sea of Japan
- Author
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O. I. Pushchina and V. V. Panchenko
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0106 biological sciences ,geography ,education.field_of_study ,Biomass (ecology) ,geography.geographical_feature_category ,biology ,Continental shelf ,010604 marine biology & hydrobiology ,Gilbert's Irish lord ,Population ,Hemilepidotus gilberti ,04 agricultural and veterinary sciences ,Aquatic Science ,Body size ,Cottidae ,biology.organism_classification ,Body weight ,01 natural sciences ,Fishery ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,General Agricultural and Biological Sciences ,education - Abstract
Main concentrations of Gilbert’s Irish lord Hemilepidotus gilberti in the Russian waters of the Sea of Japan are registered off the coasts of South and Central Primorye and western Sakhalin. During the course of the year, the representatives of the species are found at the depths between 9 and 668 m at a water temperature of the near-bottom layer from –1.8 to +16.1°С. In the summer, they prefer the upper and middle zones of the shelf with a temperature between 1.5 and 3.0°С, while the fishes are found in the lower part of the shelf and upper zone of the continental slope with low positive temperatures in the winter. The juveniles live at smaller depths than adult individuals and at the largest seasonal temperature fluctuations. The fishes 3–37 cm in body length are registered in the catches, and the size group 18–26 cm prevails. The females are more abundant in the population, and they reach a larger body size than the males. Mass spawning occurs in August and September at the depth of 30–80 m. In the waters of Primorye, Gilbert’s Irish lord feeds on mainly decapods, polychaetes, and amphipods. From April to November, the daily ration of the juveniles and adult fishes is equal to 5.0 and 3.0% of body weight, respectively. Two maximums are observed in the feeding intensity of adult fishes: prespawning (July) and postspawning (November). The biomass of Gilbert’s Irish lord in the Russian waters of the Sea of Japan is estimated as 1500 t. more...
- Published
- 2018
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16. Ichthyofauna in the Intertidal Zone of Avacha Bay (Southeastern Kamchatka)
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M. Yu. Murasheva and A. M. Tokranov
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0106 biological sciences ,Biotope ,biology ,010604 marine biology & hydrobiology ,Intertidal zone ,04 agricultural and veterinary sciences ,Aquatic Science ,Cottidae ,biology.organism_classification ,01 natural sciences ,Fishery ,Stone cockscomb ,Geography ,040102 fisheries ,Littoral zone ,Period (geology) ,0401 agriculture, forestry, and fisheries ,Alectrias alectrolophus ,General Agricultural and Biological Sciences ,Bay - Abstract
The composition of ichthyofauna in the intertidal zone of Avacha Bay (southeastern Kamchatka) is characterized. Over the entire period of studies since the 1930s, 27 fish species from 12 families have been recorded in the intertidal zone; Cottidae and Liparidae constitute more than 44% of them. Fishes recorded in the intertidal zone are components of seven ichthyocenes, but the nucleus (81.5%) is formed by representatives of only three of them: littoral, sublittoral, and elittoral ichthyocenes. Most species are rare (85.2%), and only stone cockscomb Alectrias alectrolophus is a numerous species that constantly occurs in biotopes formed by pebble-boulder grounds. Juveniles constitute a prevailing proportion of fish species (63%) recorded in the intertidal zone of Avacha Bay. more...
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- 2018
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17. Gamet Ultrastructure in Some Species of the Genus Icelus (Pisces: Cottidae)
- Author
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S. Yu. Neznanova
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0106 biological sciences ,Axoneme ,endocrine system ,Morphology (linguistics) ,biology ,urogenital system ,010604 marine biology & hydrobiology ,Radiata ,04 agricultural and veterinary sciences ,Cell Biology ,Anatomy ,Cottidae ,biology.organism_classification ,01 natural sciences ,Spiniger ,Genus ,Icelus spiniger ,embryonic structures ,040102 fisheries ,Ultrastructure ,0401 agriculture, forestry, and fisheries ,reproductive and urinary physiology - Abstract
With the help of scanning and transmission electron microscopy, the morphology of spermatozoa of Icelus spiniger and egg envelopes of I. spiniger and I. spatula has been studied. Spermatozoa have an elongated head flattened on one side, an insignificant centriolar fossa, and numerous mitochondria in the middle section. The axoneme has a structure described by the formula 9 + 2. The envelopes of oocytes of both species have a follicular membrane, chorion, and zona radiata. more...
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- 2018
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18. Morphological Description, Intraspecific Variation, and Relationships of Cherskii’s sculpin Cottus czerskii (Cottidae)
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E. V. Kolpakov and P. A. Saveliev
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0106 biological sciences ,Fin ,biology ,Range (biology) ,010604 marine biology & hydrobiology ,Fish fin ,Zoology ,04 agricultural and veterinary sciences ,Aquatic Science ,Cottidae ,biology.organism_classification ,01 natural sciences ,Intraspecific competition ,Sexual dimorphism ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Sculpin ,Allometry ,General Agricultural and Biological Sciences - Abstract
Detailed morphological description of Cherskii’s sculpin Cottus czerskii (Cottidae) is conducted. Main directions of intraspecific variation of the phenotype are described. The ontogenetic variation of 24 of 31 morphometric characters is registered. The characters are subdivided into four categories based on the features of their variation and degree of ontogenetic allometry. Sexual dimorphism is observed based on the following characters: length of the rays of the pelvic fin, length of the anal fin base, depth of the anal fin, antedorsal distance, and head depth. A latitudinal increase of the fin rays in the anal and pectoral fins from the southern to the northern parts of the biogeographic range is registered. The relationships of the species with other representatives of the family Cottidae are discussed based on the comparative analysis of morphological and ecological features. A complex of plesiomorphic morphological and ecological characteristics, which are similar to those in more ancient catadromous, brackish-water, and marine forms, is described. Based on morphological characters, C. czerskii is substantially similar to C. hangiongensis. more...
- Published
- 2018
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19. Comparison of Ichthyofauna Composition in Different Areas of Russian and Korean Waters in Sea of Japan/East Sea
- Author
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P. V. Kalchugin, D. G. Kravchenko, O. Z. Badayev, and D. V. Izmyatinsky
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0106 biological sciences ,education.field_of_study ,Water area ,biology ,010604 marine biology & hydrobiology ,Population ,Scorpaeniformes ,Aquatic Science ,biology.organism_classification ,Cottidae ,010603 evolutionary biology ,01 natural sciences ,Perciformes ,Geography ,Oceanography ,%22">Fish ,Composition (visual arts) ,General Agricultural and Biological Sciences ,education - Abstract
The specificity of the species composition of the ichthyofauna in the Russian and Korean waters in the Sea of Japan/East Sea (northwards from 35°17′N) is considered. The population and the proportion of species from the order of the perch-like fishes (Perciformes) steadily decline from the south towards the north; the proportion of the species from the order of the ray-finned fish (Scorpaeniformes) tends to rise. The northward latitudinal gradient in the family composition variability results in a decrease of their numbers along with a significant increase in the sculpins (Cottidae) and the picklebacks (Stichaeidae) in the species composition. In the southernmost region of the studied water area, the sublittoral species tend to prevail; in all of the others, the elittoral species are predominant. The four northern areas are characterized by a high similarity in the species composition (81.8%); this value is significantly lower (63.1%) in case of their comparison with the more southern areas. The similarity in the ichthyofauna composition between the southernmost area and the other studied water area comprises 44.1%. more...
- Published
- 2018
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20. New findings of rare fish species in Indian and Pacific oceans with the description of two new species from the families Gobiidae and Platycephalidae
- Author
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A. M. Prokofiev
- Subjects
0106 biological sciences ,biology ,Zoology ,04 agricultural and veterinary sciences ,Platycephalidae ,Aquatic Science ,Cottidae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Oneirodidae ,Moridae ,Pegasidae ,Vanderhorstia ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Myoxocephalus brandtii ,General Agricultural and Biological Sciences ,Cottus - Abstract
We provide information about the morphology and new findings of 15 rare fish species from the families Bathyclupeidae, Callionymidae, Champsodontidae, Cottidae, Gobiidae, Lophichthyidae, Melanostomiidae, Moridae, Oneirodidae, Paralepididae, Pegasidae, Platycephalidae, and Uranoscopidae. Two new species are described: Thysanophrys haploblepharis sp. n. (Platycephalidae) from the Western Indian Ocean and Vanderhorstia stegauchenia sp. n. (Gobiidae) from the South China Sea. The new synonymy is established: Cottus dybowskii Hilgendorf, 1879 = Myoxocephalus brandtii. more...
- Published
- 2017
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21. Redescription of Cottus sibiricus and an estimation of differences between this species and Cottus dzungaricus (Cottidae)
- Author
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V. G. Sideleva
- Subjects
0106 biological sciences ,0301 basic medicine ,Cottus dzungaricus ,biology ,Zoology ,Aquatic Science ,Subspecies ,Cottidae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Molecular analysis ,03 medical and health sciences ,030104 developmental biology ,Sculpin ,Cottus sibiricus ,General Agricultural and Biological Sciences - Abstract
The type specimens of Cottus sibiricus and C. dzungaricus as well as individuals from the Olkha River (Yenisei River basin) are studied. The diagnostic features of C. sibiricus are established. Comparative morphological and molecular analysis of divergence between C. sibiricus and C. dzungaricus demonstrates that the differences lie within the limits of one polymorphous species. The rank of Dzungarian sculpin is lowered to the subspecies, C. sibiricus dzungaricus. more...
- Published
- 2017
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22. Molecular genetic and karyological analysis of antlered sculpins of Enophrys diceraus group (Cottidae)
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A. V. Petrovskaya, S. A. Borisenko, O. A. Radchenko, and I. N. Moreva
- Subjects
0106 biological sciences ,0301 basic medicine ,biology ,Zoology ,Robertsonian translocation ,Karyotype ,Enophrys diceraus ,medicine.disease_cause ,Cottidae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Molecular analysis ,03 medical and health sciences ,030104 developmental biology ,Genetics ,medicine ,Antlered sculpin ,Genetic variability - Abstract
Molecular genetic and karyological analyses of antlered sculpin, Enophrys diceraus, from the Sea of Japan and the Sea of Okhotsk were carried out. The karyotype of this species was studied for the first time. On the basis of karyological analysis, it was established that E. diceraus from the Sea of Japan and the Sea of Okhotsk was polymorphic in terms of the number of chromosomes and their morphology (2n = 36, 35, and 37, NF = 40). It was suggested that the karyotype with 35 chromosomes could have been produced as a result of Robertsonian translocation; the karyotype with 37 chromosomes could have been produced by crossing of individuals with different number of chromosomes. On the basis of the molecular genetic analysis of the mitochondrial COI and 16S rRNA genes, considerable differences between E. diceraus from the Sea of Japan and the Sea of Okhotsk corresponding to the level of interspecies genetic variability were established. It is concluded that E. diceraus from the Sea of Japan belongs to another species, most likely, E. namiyei. more...
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- 2017
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23. Finding of Amur sculpin Mesocottus haitej and Cottus szanaga (Cottidae) in Tugur River basin (Khabarovsk krai, Russia)
- Author
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S. F. Zolotukhin, A. N. Kanzeparova, and P. A. Saveliev
- Subjects
0106 biological sciences ,geography ,geography.geographical_feature_category ,biology ,Ecology ,Drainage basin ,04 agricultural and veterinary sciences ,Aquatic Science ,Structural basin ,biology.organism_classification ,Cottidae ,010603 evolutionary biology ,01 natural sciences ,Mesocottus haitej ,Fishery ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Sculpin ,General Agricultural and Biological Sciences ,Cottus - Abstract
The first official finding of the Amur sculpin Mesocottus haitej and Cottus szanaga is reported for the basin of Tugur River (Shantarsky zoogeographical region). Previously, these species were known for this region from the literature only. more...
- Published
- 2017
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24. Biological features of the common fish species in Olyutorsky-Navarin region and the adjacent waters of the Bering Sea: 4. family sculpins (Cottidae)
- Author
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A. V. Datsky
- Subjects
0106 biological sciences ,biology ,Yellow Irish lord ,010604 marine biology & hydrobiology ,Fishing ,Fish species ,04 agricultural and veterinary sciences ,Aquatic Science ,Cottidae ,biology.organism_classification ,01 natural sciences ,Fishery ,Abundance (ecology) ,Shorthorn ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Dominance (ecology) ,Sculpin ,General Agricultural and Biological Sciences - Abstract
Based on the materials of investigations conducted for 20 years (1995−2015), the features of biology of the common fish species of the family Cottidae from the northwestern Bering Sea are studied. These species are found during summer and fall in the waters of the Olyutorsky-Navarin region. The size–age parameters of the fishes collected with different fishing gears, as well as the features of their body length and body weight dynamics, spawning time, and spawning conditions, are described. The largest exemplars of shorthorn sculpin Myoxocephalus verrucosus and staghorn sculpins, armorhead sculpin Gymnocanthus galeatus and G. detrisus, are recorded in the catches of snurrevads, while the fishes caught in trawls are characterized by smaller size. Interannual variability of the size composition of the fish is related to the abundance of certain generations or to the fishery directed to different associations of sculpins. In the coastal waters, comparatively low average body size is usual for the majority of common sculpin species (with the exception of lords, yellow Irish lord H. jordani and Gilbert’s Irish lord H. gilberti) because of the dominance of juveniles. more...
- Published
- 2017
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25. A new horned sculpin (Pisces: Cottidae) from the Miocene of Sakhalin Island, Russia
- Author
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Mikhail V. Nazarkin
- Subjects
0106 biological sciences ,010506 paleontology ,Teleostei ,biology ,Fish fin ,Paleontology ,Cottidae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Enophrys ,Dorsal fin ,Extant taxon ,Genus ,Sculpin ,0105 earth and related environmental sciences - Abstract
A new species of the Recent genus Enophrys, E. hoplites sp. nov., is described from the Miocene (Serravalian‒Tortonian) Agnevo Formation of Sakhalin Island, Russia. This Miocene species differs from two Recent congeners in the greater number of anal fin rays (14 versus 9‒13), the smaller head, less raised margins of the orbit, flatter upper contour of the head, longer anal fin base, short predorsal distance, higher first dorsal fin, and in the right angle (versus acute angle) between two upper preopercular spines. An archaic feature of the new species is the presence of two rays on the posterior pterygiophore of the anal fin, a character recorded only in the most primitive Recent members of the family. The occurrence of this new fossil species shows that extant subfamilies, tribes, and genera existed as a part of the family Cottidae as early as the Miocene time. more...
- Published
- 2017
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26. Ichthyofauna of fresh and brackish waters of Sakhalin Island: An annotated list with taxonomic comments: 3. Gadidae–cryptacanthodidae families
- Author
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A. M. Orlov and Yu. V. Dyldin
- Subjects
0106 biological sciences ,Beloniformes ,biology ,010604 marine biology & hydrobiology ,Gadiformes ,Scorpaeniformes ,04 agricultural and veterinary sciences ,Aquatic Science ,Gadidae ,biology.organism_classification ,Cottidae ,01 natural sciences ,Perciformes ,Fishery ,Hexagrammidae ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Gasterosteiformes ,General Agricultural and Biological Sciences - Abstract
The third part of the work provides a continuation of the annotated list of fish species found in freshwater and coastal brackish waters of Sakhalin Island: 60 species belonging to 42 genera, 21 families (Gadidae, Lotidae, Scomberesocidae, Belonidae, Hemiramphidae, Hypoptychidae, Gasterosteidae, Syngnathidae, Sebastidae, Hexagrammidae, Cottidae, Hemitripteridae, Agonidae, Liparidae, Percichthyidae, Lateolabracidae, Carangidae, Mugilidae, Zoarcidae, Stichaeidae, Cryptacanthodidae) and six orders (Gadiformes, Beloniformes, Gasterosteiformes, Syngnathiformes, Scorpaeniformes, Perciformes). more...
- Published
- 2017
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27. The karyotype of the great sculpin, Myoxocephalus polyacanthocephalus (Pallas, 1814) (Pisces: Cottidae), from the Russian part of the species range
- Author
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I. N. Moreva and S. A. Borisenko
- Subjects
0106 biological sciences ,Genetics ,Myoxocephalus ,biology ,010604 marine biology & hydrobiology ,Species distribution ,Zoology ,Karyotype ,Aquatic Science ,Myoxocephalus polyacanthocephalus ,Oceanography ,biology.organism_classification ,Cottidae ,010603 evolutionary biology ,01 natural sciences ,Centromere ,Sculpin ,Nucleolus organizer region - Abstract
The karyotype of the great sculpin, Myoxocephalus polyacanthocephalus (Pallas, 1814) (Pisces: Cottidae) from the Sea of Okhotsk and the Sea of Japan has been studied for the first time. The karyotype is stable; it consists of 40 chromosomes (4 metacentric, 2 submeta-subtelocentric, 20 subtelocentric, and 14 acrocentric chromosomes); the number of chromosomal arms is 44 + 2. Nucleolar organizer regions (NOR) are found in the telomeric region of the arm in one homologue of a pair of small metacentric chromosomes, using the Ag-NOR banding technique. A comparative analysis of the karyotype of M. polyacanthocephalus and the karyotypes of other Myoxocephalus species (M. stelleri, M. brandtii, M. jaok, M. ochotensis, and M. scorpius) has been carried out based on the main karyotype characters, as well as on the number and localization of NORs. The identified differences make it possible to differentiate the studied species, whereas the general traits indicate their taxonomic proximity. more...
- Published
- 2017
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28. The current status of demersal fish resources in the Russian waters of the Sea of Japan
- Author
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E. P. Chernienko, S. F. Solomatov, P. V. Kalchugin, and M. I. Boyko
- Subjects
0106 biological sciences ,geography.geographical_feature_category ,biology ,Continental shelf ,010604 marine biology & hydrobiology ,04 agricultural and veterinary sciences ,Aquatic Science ,Gadidae ,Oceanography ,biology.organism_classification ,Cottidae ,01 natural sciences ,Fishery ,Demersal fish ,Geography ,Herring ,Clupeidae ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Sculpin ,Bay - Abstract
A bottom trawl survey was conducted over all of the shelf and continental slope in the Russian waters of the Sea of Japan, from Peter the Great Bay to the La Perouse Strait, from March 31 to July 8, 2015. The species composition and biomass of demersal fish were determined for Peter the Great Bay, waters of southern and northern Primorye, and the West Sakhalin subzone. The bulk of the biomass (over 90% of the estimated biomass in the study areas) was formed by four families: Gadidae, Pleuronectidae, Cottidae, and Clupeidae. The highest biomass, 218000 t, was recorded from the West Sakhalin subzone; the lowest, 77400 t, was found from Peter the Great Bay. The proportions of biomasses of the considered species varied substantially between areas: walleye pollock and plain sculpin dominated by biomass in Peter the Great Bay; walleye pollock and scale-eye plaice dominated off southern Primorye; herring dominated off northern Primorye; and scale-eye plaice and speckled founder were dominant in the West Sakhalin subzone. The density of the fish concentration was determined for several bathymetric ranges in the considered areas. In the period of studies, the pattern of distribution of fish in Peter the Great Bay was still of the winter type, which is characterized by high concentrations over the continental slope. There was some shift towards shallower depths in Primorye waters; however, taking the great latitudinal span of the area of the research and the early spring into account, these migrations were not so clearly pronounced, as would be observed in later periods. The most distinct differences in the bathymetric distribution were found in the West Sakhalin subzone, where the distribution pattern corresponded mostly to the summer type with its high concentrations in shallow waters and low ones over the continental slope. According to the estimates in 2015, the biomass of demersal fish slightly increased as compared to the values of the 1980s–1990s. more...
- Published
- 2016
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29. Embryonic and early larval development of Cottus czerskii Berg, 1913 (Scorpaeniformes: Cottidae)
- Author
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V. P. Gnyubkina, I. V. Epur, and P. A. Saveliev
- Subjects
0106 biological sciences ,biology ,Hatching ,Fish fin ,Scorpaeniformes ,04 agricultural and veterinary sciences ,Anatomy ,Aquatic Science ,Oceanography ,Cottidae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,medicine.anatomical_structure ,embryonic structures ,040102 fisheries ,medicine ,0401 agriculture, forestry, and fisheries ,Sculpin ,Yolk sac ,Snout ,Cottus - Abstract
The embryonic and early larval development of the Cherskii’s sculpin Cottus czerskii Berg, 1913 was studied. The duration of the embryonic period was 21 days at a water temperature of 9–10°C. Pelagic larvae of approximately 8.0 mm total length leave the egg envelopes, with a large rounded yolk sac with one large oil globule, 10–12 trunk and 30–31 precaudal myomeres and several large melanophores on the yolk sac, 2 melanophores in the peritoneal region, and 30 melanophores in a postanal ventral row. At 11 days after hatching at a length of 9.0 mm, the yolk sac is completely resorbed and the number of myomeres remains the same; seven rays become visible in the caudal fin. The fully formed larva of C. czerskii has an elongated body, a small head, a rounded snout, and an oblong tail part. The melanophores are located in the peritoneal area above the gut, in the abdominal area, and in the postanal ventral row. Armament in the form of spines on the top of the head is absent, pointing to the affiliation of the species that we studied to the Cottus–Leptocottus phenetic group. more...
- Published
- 2016
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30. The Karyotype of the flathead sculpin Megalocottus platycephalus taeniopterus (Kner, 1868) (Pisces: Cottidae) from Vostok Bay, Sea of Japan
- Author
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S. A. Borisenko and I. N. Moreva
- Subjects
0106 biological sciences ,0301 basic medicine ,010604 marine biology & hydrobiology ,Zoology ,Chromosome ,Karyotype ,Platycephalus ,Anatomy ,Aquatic Science ,Biology ,Subspecies ,Oceanography ,biology.organism_classification ,Cottidae ,01 natural sciences ,03 medical and health sciences ,030104 developmental biology ,Sculpin ,Flathead ,Nucleolus organizer region - Abstract
For the first time, we studied the karyotype of the flathead sculpin Megalocottus platycephalus taeniopterus (Kner, 1868) from Vostok Bay of the Sea of Japan. The karyotype is stable: 2n = 42 (2 metacentric, 2 submeta-subtelocentric, 30 subtelocentric, and 8 acrocentric chromosomes), NF = 44 + 2. The nucleolar organizers (NOs) were identified using Ag banding in two pairs of chromosomes: in the telomeric parts of the short arm of the medium-size subtelocentric chromosome and the long arm of the large acrocentric chromosome. Variations in the number of nucleolar organizer chromosomes and in the number of NO staining blocks were found. Comparison of the karyotypes of M. p. taeniopterus and previously studied M. p. platycephalus (Pallas, 1814) from the northern Sea of Okhotsk revealed their similarity in the number and morphology of chromosomes and the number of chromosome arms and difference between the subspecies in the number and location of NO, which allows their discrimination. more...
- Published
- 2015
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31. Ichthyofauna of the Russian exclusive economic zone of the Bering Sea: 1. Taxonomic diversity
- Author
-
A. V. Datsky
- Subjects
Fishery ,Flatfish ,biology ,Salmoniformes ,Gadiformes ,Scorpaeniformes ,Aquatic Science ,Pleuronectidae ,General Agricultural and Biological Sciences ,biology.organism_classification ,Cottidae ,Perciformes ,Global biodiversity - Abstract
The species list of ichthyofauna of the Russian exclusive economic zone of the Bering Sea has been developed using the original data obtained in 1995–2012 and the data published since the very beginning of the studies in this region. The species list includes 344 species belonging to 188 genera, 65 families, and 23 orders. The diversity of the ichthyofauna of the western Bering Sea, calculated under the ratio of species, genera, and families, is significantly higher than that observed for the Arctic seas, the seas of the European part of Russia (except the Caspian Sea), and the Sea of Japan. It is similar to the diversity of the ichthyofauna of coastal waters of the northern Kuril Islands and the northern Sea of Okhotsk. The maximal diversity has been found for scorpion fishes and sculpins (Scorpaeniformes), perch-like fishes (Perciformes), salmons (Salmoniformes), flatfishes (Pleuronectiformes), and cods and hakes (Gadiformes). These orders comprise 33 families (50.8% of total number of families), 139 genera (73.9% of total number of genera), and 279 species (81.1% of total number of species) in total. The maximal diversity belongs to the scorpion fishes and sculpins and the perch-like fishes; they dominate absolutely by the number of the lower-order taxa (families, genera, and species). Such families as sculpins (Cottidae), eelpouts (Zoarcidae), snailfishes (Liparidae), righteye flounders (Pleuronectidae), pricklebacks (Stichaeidae), and poachers (Agonidae) are presented by 175 species, or comprise 50.9% of the total diversity of ichthyofauna. more...
- Published
- 2015
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32. Variability and status of intraspecific forms of sand sculpin Leocottus kesslerii (Cottidae)
- Author
-
B. E. Bogdanov
- Subjects
education.field_of_study ,biology ,Range (biology) ,Ecology ,Population ,Aquatic Science ,Subspecies ,biology.organism_classification ,Cottidae ,Intraspecific competition ,Intergradation ,Leocottus kesslerii ,Sculpin ,General Agricultural and Biological Sciences ,education - Abstract
Results of study of phenotypic variation of sand sculpin Leocottus kesslerii in Lake Baikal and water bodies of the Baikal region are presented. It was found that interpopulation variation of characters has a gradient pattern, while differences reach taxonomically significant level only between samples with maximum and minimal values of characters. Since variation of characters is characterized by primary intergradation and isolation barriers within the range are not insurmountable, it seems inexpedient to assign an independent taxonomic status to any forms either in proper Baikal or beyond its limits. Sand sculpin is a monotypic polymorphic species, whose phenotypic isolation of populations reflects the level of their spatial and ecological segregation. more...
- Published
- 2015
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33. Fish fauna of the Chukchi Sea and perspectives of its commercial use
- Author
-
A. V. Datsky
- Subjects
biology ,Ecology ,Fauna ,Fishing ,Rare species ,Species diversity ,Aquatic Science ,Pleuronectidae ,Cottidae ,biology.organism_classification ,Fishery ,Arctic ,Benthic zone ,General Agricultural and Biological Sciences - Abstract
Based on studies of 1995–2010 and other registered captures of fishes and fish-like over the entire history of the study of the Chukchi Sea, a list of its fish fauna species is compiled, including 110 species belonging to 68 genera, 26 families, and 11 orders. Taxonomic diversity of the fish fauna is considered and its characteristics for belonging to a geographical area and biotopical groups of fish are given. For the ratio of species, genera, and families, the fish fauna of the Chukchi Sea is significantly more diverse than that of the other Arctic seas, including the Barents Sea, and demonstrates a certain similarity for these indicators with the fish fauna of the western Bering Sea. Fish communities of the Chukchi Sea are dominated by Cottidae, Zoarcidae, Pleuronectidae, Stichaeidae, Agonidae, and Salmonidae, constituting a total of 73 species, or 66.4% of the species diversity. Benthic fishes of elittoral and sublittoral complexes dominate in terms of the biotopic belonging (74 species, 67.2%); arctic, arctic-boreal, and Pacific and Asiatic boreal species (89 species, 80.9%) dominate in terms of the zoogeographic belonging. Information availability for the bioresource potential of the Chukchi Sea is insufficient: fishing is not carried out or there are no accessible data on it. Most of the fish fauna of the Chukchi Sea (68 species or 61.8% of species diversity) consists of rare species. Out of the 42 species regularly registered in the fishing gear, 11 species are recommended for commercial use. more...
- Published
- 2015
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34. Redescription of Cottus koshewnikowi (Cottidae) and its morphological variability in tributaries of the upper Volga
- Author
-
V. G. Sideleva, V. P. Prirodina, Yu. S. Reshetnikov, and Z. V. Zhidkov
- Subjects
geography ,geography.geographical_feature_category ,biology ,Peduncle (anatomy) ,Occiput ,Anatomy ,Aquatic Science ,biology.organism_classification ,Cottidae ,Trunk ,Dorsal fin ,medicine.anatomical_structure ,Tributary ,medicine ,General Agricultural and Biological Sciences ,Cottus ,Genus Cottus - Abstract
Three samples of the genus Cottus have been studied: type specimens from the upper Volga system (tributaries of the second and third orders and the Lake Seliger) and also individuals from the upper stream of the Oka River (near Kaluga) and from the middle Kama River (near Perm). They are morphologically related to one species Cottus koshewnikowi Gratzianow, 1907. The following diagnostic characters are determined: usually, trunk partially covered by short bone spickles; small skin papillae present on dorsal side of head; caudal peduncle short, its length 6–11% (on average 8.3%) of SL; head dorsoventrally flattened, its depth near occiput 52.2% of head length, on average; interorbital space narrow, 1.6–2.1 (1.9) times less than eye diameter; mouth comparatively small, length of upper jaw 28–35 (30.5)% of head length; lateral canal partial, reaches 10th-16th ray of second dorsal fin and with 22–27 pores, terminal 1–4 autonomous segments with pores present. more...
- Published
- 2015
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35. Structure and spatial variation of bottom fish communities of the northwestern Bering Sea
- Author
-
P. Yu. Andronov and A. V. Datsky
- Subjects
Bottom feeder ,biology ,Ecology ,Range (biology) ,Aquatic Science ,Pleuronectidae ,Cottidae ,biology.organism_classification ,Spatial distribution ,Geography ,Oceanography ,Boreal ,Spatial variability ,General Agricultural and Biological Sciences ,Global biodiversity - Abstract
According to results of integrated record summer-autumn trawl surveys performed in 2004, 2005, and 2008 in the shelf-continental region of the northwestern Bering Sea from Cape Olyutorsky to Bering Strait in the range of depths 14–563 m, eight bottom communities of fish and fish-like were distinguished and their structure was described. In the composition of communities, 142 species from 29 families were recorded, among which Cottidae, Pleuronectidae, Zoarcidae, Agonidae, Stichaeidae, and Liparidae dominate by the number of species. According to biotopic belonging, bottom fish of elittoral, mesobenthal, and sublittoral complexes dominate in catches; according to zoogeographic belonging, wide boreal, arctic-boreal, and high boreal species dominate. Spatial change in the species structure of fish communities proceeds in correspondence with main regularities of life distribution in the ocean—principles of vertical and latitudinal zonality. The strongest relation of spatial variation of bottom fish communities was established with depth. Using multivariate nonmetrical scaling, five fish communities corresponding to different bathymetric ranges (sublittoral, elittoral, transitory shelf-bathyal, α-bathyal, and β-bathyal) were distinguished. Within sublittoral, elittoral, and shelf-bathyal communities, latitude zonal groups of Olyutorsky-Navarin and Anadyr regions having a lower hierarchic status were distinguished. In an interannual aspect, stability of the number of separated bottom fish communities and similarity of their spatial distribution in the examined sea areas is traced. more...
- Published
- 2014
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36. Spatial distribution and long-term dynamics of biomass of demersal fish in the zone of the Eastern Sakhalin current (Sea of Okhotsk)
- Author
-
Kim Sen Tok
- Subjects
Biomass (ecology) ,biology ,Aquatic Science ,Gadidae ,Pleuronectidae ,biology.organism_classification ,Cottidae ,Spatial distribution ,Demersal zone ,Current (stream) ,Fishery ,Demersal fish ,General Agricultural and Biological Sciences ,Geology - Abstract
According to bottom trawl surveys of 1988–2012, spatial distribution, structure, and dynamics of biomass of demersal ichthyocenosis in the northeastern waters of Sakhalin are analyzed. It is shown that the shelf zone is of decisive importance for formation of fish aggregations in this region. Main fish aggregations in the region are confined to the zone of widened shelf near northeastern lagoons of the island at 52°–53° N. Demersal ichthyocenoses are represented mainly by mass species of Gadidae, Pleuronectidae, and Cottidae. Main trends of long-term dynamics of fish biomass of eastern Sakhalin waters are similar to those in waters of northeastern (Kamchatka) and southeastern (south Kurils) parts of the Sea of Okhotsk. Long-term data indicate a tendency for an increase in the total biomass of fish in the periods of sea warming that are favorable for appearance of strong-year classes in mass species. more...
- Published
- 2014
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37. Distribution and some features of biology of thorny sculpin Icelus cataphractus (Cottidae) in the Sea of Japan
- Author
-
V. V. Panchenko and S. F. Solomatov
- Subjects
geography ,Biomass (ecology) ,geography.geographical_feature_category ,Continental shelf ,Range (biology) ,Aquatic Science ,Biology ,biology.organism_classification ,Cottidae ,Crustacean ,Fishery ,Period (geology) ,Icelus cataphractus ,General Agricultural and Biological Sciences ,Bay - Abstract
In the northwestern part of the Sea of Japan, thorny sculpin Icelus cataphractus reaches a length of 32 cm and occurs at depths 22–650 m. As a numerous species, it can be characterized for Peter the Great Bay and adjacent areas of Primorye. The range of dwelling of I. cataphractus is widest in the period of spring migrations from the sites of wintering and in the period of summer feeding. During the year, I. cataphractus prefers depths of the upper section of the continental slope and the lower part of the shelf with moderate positive temperature. Highest concentrations are observed in the summer season. Females of I. cataphractus reach greater sizes than males; their proportion in catches, on the whole, is higher, but males dominate in medium size groups. Mature individuals are recorded beginning from a length of approximately 15 cm; spawning period is confined to the summer-autumn season. Along the continental coast of the Sea of Japan, I. cataphractus is distributed between 36° and 51° N. The bulk of feeding of I. cataphratus is formed by bottom and near-bottom crustaceans. more...
- Published
- 2014
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38. Some features of biology of butterfly sculpin Melletes papilio (Cottidae) in the pre-Kamchatka waters of the Sea of Okhotsk
- Author
-
A. M. Tokranov
- Subjects
Shore ,geography ,geography.geographical_feature_category ,Butterfly sculpin ,Ecology ,Range (biology) ,Aquatic Science ,Biology ,Body weight ,Cottidae ,biology.organism_classification ,Melletes papilio ,Water level ,Oceanography ,Water temperature ,General Agricultural and Biological Sciences - Abstract
Data on occurrence, spatial-bathymetric distribution, size-weight composition, size-sex structure, and food composition of butterfly sculpin Melletes papilio in the Sea of Okhotsk waters off the Kamchatka shores are given. This species is a relatively nonnumerous representative of fam. Cottidae with maximal length 42 cm and body weight to 960 g. In summer time, the species occurs practically over the whole study region at depths of 15 m to 285 m and water temperature near the bottom from −0.9 to 10.7°C. However, the majority of individuals of this species occur within the depths range of 41–80 m in the cold intermediate water level at minimal positive ( more...
- Published
- 2014
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39. Variability and relationships of the Far Eastern species of sculpins Myoxocephalus and Megalocottus (Cottidae) based on mtDNA markers and karyological data
- Author
-
I. N. Moreva and A. V. Podlesnykh
- Subjects
Genetics ,Myoxocephalus ,Monophyly ,biology ,Phylogenetic tree ,Cytochrome b ,Chromosomal polymorphism ,Zoology ,biology.organism_classification ,Clade ,Cottidae ,Nucleotide diversity - Abstract
The phylogenetic relationships among five species of sculpins, including Myoxocephalus stelleri, M. brantii, M. jaok, M. ochotensis, and Megalocottus platycephalus, were estimated from the sequence vari� ability of the mtDNA cytochrome b (cytb) and cytochrome oxidase 1 (CO1) genes. Analysis of the topologies of combined phylogenetic trees showed that all of the morphologically described species from different gen� era represented monophyletic groups with high support of branch robustness. Haplotypes with different kary� otypes from different geographical localities with an intragroup nucleotide diversity of 0.42% were combined into the M. stelleri clade. All of the species (except for M. stelleri from the Sea of Japan and the Okhotsk Sea coast of the Hokkaido Island) were characterized by relatively low values of the intragroup variation, along with high values of interspecific variation of mtDNAencoded markers. Studies of the M. stelleri karyotypes using Agbanding showed that karyotypes of the indivi duals from the Sea of Japan and Okhotsk differed not only in the number of chromosomes (2n) but also in the number of active nucleolus organizers (NO) and stained NO blocks, calling into question whether they belong to a single species. The observed discrepancy between the phylogenetic topologies and karyological data is discussed in relation to the informative capacity of mtDNA fragments and the phenomenon of intraspecific chromosomal polymorphism. more...
- Published
- 2014
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40. The karyotype of the flathead sculpin Megalocottus platycephalus platycephalus (Pallas, 1814) (Pisces: Cottidae) from Odyan Bay, Sea of Okhotsk
- Author
-
I. N. Moreva and S. A. Borisenko
- Subjects
Myoxocephalus ,biology ,Zoology ,Platycephalus ,Karyotype ,Aquatic Science ,Oceanography ,biology.organism_classification ,Cottidae ,Fishery ,Sculpin ,Flathead ,Nucleolus organizer region ,Bay - Abstract
This study deals with the karyotype of the flathead sculpin Megalocottus platycephalus platycephalus (Pallas, 1814) (family Cottidae) from Odyan Bay of the Sea of Okhotsk. The karyotype is stable: 2n = 42 (2 metacentric, 2 submeta-subtelocentric, 30 subtelocentric, and 8 acrocentric chromosomes), NF = 44 + 2. The nucleolar organizers (NOs) were identified using Ag-banding in the telomere parts of the short arms of two large subtelocentric chromosomes. Variations in the number of nucleolar organizer chromosomes and in the number of NO-staining blocks were found. Comparison of the karyotype of M. p. platycephalus with the karyotypes of previously studied species of the genus Myoxocephalus from the Sea of Japan and the Sea of Okhotsk revealed their significant similarity in the main features and difference in the number and localization of NORs. more...
- Published
- 2014
- Full Text
- View/download PDF
41. The first data on the biology and distribution of the Japanese fringed sculpin Porocottus japonicus Schmidt, 1935 (Scorpaeniformes: Cottidae) in the northwestern Sea of Japan
- Author
-
P. A. Saveliev and Ye. V. Kolpakov
- Subjects
0106 biological sciences ,010604 marine biology & hydrobiology ,Scorpaeniformes ,04 agricultural and veterinary sciences ,Aquatic Science ,Biology ,Oceanography ,biology.organism_classification ,Cottidae ,01 natural sciences ,Macrophyte ,Porocottus ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Fringed sculpin ,Bay - Abstract
The Japanese fringed sculpin Porocottus japonicus Schmidt has been found in the Rynda (44°48′03″ N, 136°23′24″ E) and Vladimira (43°52′36″ N, 135°29′30″ E) (Sea of Japan, Primorskii krai) bays for the first time. This species was formerly known only from the northern Tatar Strait and Aniva Bay. In Primorskii krai, P. japonicus inhabits macrophyte beds in shallow sublittoral waters. It reaches a length of 112 mm during its lifespan of approximately 4 years. Spawning occurs in the winter. The species preys predominantly on polychaetes (82.3% of the food weight). more...
- Published
- 2016
- Full Text
- View/download PDF
42. Feeding pattern of the great sculpin Myoxocephalus polyacanthocephalus (Cottidae) and its position in the trophic system of near-Kamchatka waters
- Author
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A. M. Orlov and A. M. Tokranov
- Subjects
Fishery ,Flatfish ,Alaska pollock ,biology ,Decapoda ,Majidae ,Sculpin ,Aquatic Science ,Pleuronectidae ,General Agricultural and Biological Sciences ,biology.organism_classification ,Cottidae ,Trophic level - Abstract
Feeding patterns of the great sculpin Myoxocephalus polyacanthocephalus in near-Kamchatka waters of the Sea of Okhotsk, the Bering Sea and Pacific Ocean are considered using materials collected during 1978–2002. This species of Cottidae is characterized by wide feeding spectra (over 150 nutritive objects); nonetheless, fishes (on average 61.1%) and Decapoda (20.0%) have the highest significance in its diet. The fishes include Alaska pollock Theragra chalcogramma (32.7% of food mass), flatfish Pleuronectidae (12.2%), and sculpins Cottidae (10.5%); Decapoda include crabs from the family Majidae (18.5%). Seasonal, local, interannual, and age-related changes in food composition of the great sculpin are considered. This species is a facultative ambuscade predator; it is characterized by wide feeding spectra that permits him to use a considerable range of food components. In the trophic system of near-Kamchatka regions, units that form the biomass of the great sculpin are selected. more...
- Published
- 2013
- Full Text
- View/download PDF
43. Specific features of distribution and size indices of four poorly studied species of sculpins (Cottidae) in the Okhotsk Sea Waters off Kamchatka
- Author
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A. M. Tokranov
- Subjects
Water mass ,biology ,Range (biology) ,Stelgistrum ,Aquatic Science ,biology.organism_classification ,Cottidae ,Fishery ,Oceanography ,Period (geology) ,Sculpin ,General Agricultural and Biological Sciences ,Surface water ,Brightbelly sculpin - Abstract
Evidence on occurrence in catches and characteristic of the spatial-bathymetric distribution and size indices of four species of Cottidae—frog sculpin Myoxocephalus stelleri, brightbelly sculpin Microcottus sellaris, antlered sculpin Enophrys diceraus, and furseal sculpin Stelgistrum stejnegeri—in summer-autumn months in the Okhotsk Sea waters off Kamchatka (site from 51°15′ to 57°20′ N, depths of 11–100 m) are provided. The first three species occur mainly in the northern part of the shelf above 54° N at depths smaller than 30–40 m within a comparatively well warmed surface water mass of seasonal modification at near-bottom temperature values above 6°C at various solid grounds. Maximum catches of S. stejnegeri were recorded only at a site of the western Kamchatka shelf from 54°00′ to 54°20′ N on pebbly-stony ground in a narrow bathy-metric range of 41–60 m on the boundary between the well warmed surface water mass of autumn modification and the cold intermediate water mass at a water temperature below 2°C. Evidence on the size-weight indices of the studied species of Cottidae in trawl catches in the Okhotsk Sea waters off Kamchatka in the study period is provided. more...
- Published
- 2013
- Full Text
- View/download PDF
44. Specific features of distribution and ecology of two species of armorhead sculpins of the genus Gymnocanthus (Cottidae) in Pacific waters of the northern Kuril Islands and Southeastern Kamchatka
- Author
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A. M. Tokranov and A. M. Orlov
- Subjects
Ecology ,Genus ,Period (geology) ,Sculpin ,Size composition ,Aquatic Science ,Biology ,General Agricultural and Biological Sciences ,Cottidae ,biology.organism_classification ,Armorhead sculpin ,Gymnocanthus galeatus ,Gymnocanthus - Abstract
Based on materials of 1992–2012, data on the occurrence, spatial-bathymetric distribution, and size-weight composition of armorhead sculpin Gymnocanthus galeatus and purplegray sculpin G. detrisus and species accompanying them in catches in Pacific waters of the northern Kuril Islands and southeastern Kamchatka are provided. These comparatively numerous, medium-sized representatives of the family Cottidae (maximal length of the former species 49 cm, weight 1400 g and that of the latter, 48 cm and 1140 g) in the period of study occurred uniformly at depths of 76 to 596 m at a near-bottom temperatures of −1.2 to + 4.5°C. Their maximum by density concentrations were constantly recorded at the beam of the Fourth Kuril Strait, from the oceanic side of the Paramushir and Shumshu Islands, and off the southeastern extremity of Kamchatka mainly in the lower part of the shelf (depths of 80–200 m) at temperatures of −1.0 to +2.5°C. Regularities of spatial-bathymetric distribution of different size groups of these species were analyzed. It was shown that the occurrence and the size of catches of both armorhead sculpins in Pacific waters of the northern Kuril Islands and southeastern Kamchatka are subjected to some inrterannual, seasonal, and diurnal dynamics. more...
- Published
- 2012
- Full Text
- View/download PDF
45. A new species of sculpin Cottus kolymensis sp. nova (Scorpaeniformes, Cottidae) from Rivers of Kolyma
- Author
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A. Goto and V. G. Sideleva
- Subjects
Systematics ,Species group ,Scorpaeniformes ,Fish fin ,Sculpin ,Cottus poecilopus ,Anatomy ,Aquatic Science ,Biology ,General Agricultural and Biological Sciences ,biology.organism_classification ,Cottidae ,Cottus - Abstract
Sculpin from the Kolyma, Dukcha, and Glukhaya rivers is described as a new species Cottus kolymensis from the species group “Cottus poecilopus”. This species differs from the remaining species of the group (C. altaicus, C. szanaga, C. kuznetzovi, C. koreanus, and C. volki) in the combination of several characteristics: very short internal ray of ventral fin averaging 1/5 of the long ray; comparatively wide interorbital space equal or slightly smaller than longitudinal eye diameter, presence of teeth on palatine bones; as a rule, paired fifth pore of the preoperculo-mandibular canal; and an incomplete lateral canal terminating in two to three autonomous segments and opening by (13 + 2 + 2)-(23 + 2 + 2 + 2) pores. more...
- Published
- 2012
- Full Text
- View/download PDF
46. Growth and age of staghorn sculpins of the genus Gymnocanthus (Cottidae) in Peter the Great Bay and adjacent waters of Primorye (Sea of Japan)
- Author
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V. V. Panchenko
- Subjects
Larva ,biology ,Hatching ,Range (biology) ,Ecology ,Zoology ,Aquatic Science ,Cottidae ,biology.organism_classification ,Benthic zone ,Sexual maturity ,Sculpin ,General Agricultural and Biological Sciences ,Bay - Abstract
Age and growth have been studied in four species of staghorn sculpins of the genus Gymnocanthus inhabiting Primorye (the Russian sector of the Sea of Japan). Large black edged and purplegray sculpins, G. herzensteini and G. detrisus, inhabited deeper waters compared with threaded sculpin G. pistilliger and (especially) whip sculpin G. intermedius. The size differences between different sculpin species could already be revealed in the diameter of mature oocytes and the length of hatching larvae and fries passing to the benthic phase of development. The maximum size in these species correlated with their maximum age. G. herzensteini, G. detrisus, G. pistilliger, and G. intermedius could attain the age of no less than 16+, 15+, 9+, and 7+, respectively. The gains in fish of the same age were also greater in species attaining greater size values. In all the species, females lived longer than males and were larger than males of the same age. Throughout the life cycle, the growth rate gradually came down; the decrease was especially pronounced during the period of sexual maturation. In the southern part of the geographic range, the specimens of purplegray sculpin attained smaller size and showed lower growth rate compared with the fish from the northern part of the range. The threaded sculpin demonstrated the inverse relationships. In general, females were dominating in samples of staghorn sculpins; however in small and medium size groups, the proportion of males was greater, which was due to their smaller, compared with females, absolute gains. In elder groups, the proportion of males gradually went down, as they were dying earlier than females. more...
- Published
- 2012
- Full Text
- View/download PDF
47. Biology of Volk’s Sculpin Cottus volki (Cottidae) from the Serebryanka River (Central Primor’e)
- Author
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E. V. Kolpakov
- Subjects
biology ,Ecology ,Zoology ,Aquatic Science ,biology.organism_classification ,Cottidae ,Fecundity ,Spawn (biology) ,Sexual dimorphism ,Cottus volki ,Weight growth ,Sculpin ,General Agricultural and Biological Sciences ,Linear growth - Abstract
Biology of Volk’s Sculpin Cottus volki from the Sakhalin Channel is investigated (the lower reaches of the Serebryanka River). This fish species is slow and secretive, attains the length of 150 mm, weight 40 g, and age 6+. Males are larger and older than females. The highest rate of linear growth is observed in the first and second year of life, and that of weight growth is observed at the age of 4+ and 5+. They spawn from the end of April until the first ten-day period of June and are lithophilous. Females lay eggs on the lower surface of stones. Fecundity is low, up to 500 eggs. One male may spawn with several females. The feeding type is zoobenthophagous. Principal foods objects are chironomids, amphipods, and Trichoptera. It is an abundant species. more...
- Published
- 2011
- Full Text
- View/download PDF
48. Special traits of growth and feeding of the stone sculpin Paracottus knerii (Cottidae) in water bodies of different types
- Author
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B. E. Bogdanov and Yu. P. Tolmacheva
- Subjects
education.field_of_study ,biology ,Ecology ,Population ,Aquatic Science ,Structural basin ,biology.organism_classification ,Cottidae ,Predation ,Paracottus knerii ,Water body ,Littoral zone ,Sculpin ,General Agricultural and Biological Sciences ,education - Abstract
Growth and feeding of the stone sculpin Paracottus knerii (Cottidae) is investigated in Water Bodies of Different Types: Baikal (the littoral of its southern part), the Angara River, and the mountainous Sobolinoe Lake (the southern Baikal basin). The highest growth rate is characteristic of the South-Baikalian population, followed by the Angara population. The stone sculpin from Sobolinoe Lake is slow-growing. The growth rate of specimens of the latter is by 1.5–2 times lower than in the two aforementioned populations due to inferior feeding conditions of this water body. The size-age changes in the food spectrum of all investigated populations are consecutive change of all principal components and increase in size of the consumed prey more...
- Published
- 2010
- Full Text
- View/download PDF
49. Age and growth of Far Eastern staghorn sculpin Ggymnocanthus herzensteini (Cottidae) in peter the Great Bay (the Sea of Japan)
- Author
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V. V. Panchenko
- Subjects
biology ,Ecology ,Aquatic Science ,Sagitta ,biology.organism_classification ,Cottidae ,medicine.anatomical_structure ,Gymnocanthus herzensteini ,medicine ,Sculpin ,Sexual maturity ,General Agricultural and Biological Sciences ,Bay ,Demography ,Rate of growth ,Otolith - Abstract
In a sample of Far Eastern staghorn sculpin Gymnocanthus herzensteini with a length up to 40 cm, age and growth were assessed from the results of analysis of thin longitudinal sections of otolith (sagitta). Males attained to an age not less than 13 years and females attained to an age not less than 17 years. Maximum length of males is much smaller than that of females. The absolute gains of females are greater than those of males; however, there are no considerable differences in the specific rate of growth. The most intensive growth is observed in the first two to three years of life. During sexual maturation, its rate decreases. The next noticeable decrease in the rate of growth occurs in fish of elder age groups. In catches of Far Eastern staghorn sculpin in Peter the Great Bay, females dominate; however, in groups of small and medium-sized individuals, the proportion of males increases, which is related to their smaller, as compared to females, absolute gains. The subsequent decrease in the proportion of large-sized males is determined by their greater natural mortality, as compared to similar-sized females. more...
- Published
- 2010
- Full Text
- View/download PDF
50. Structure of the mouth opening and pharyngeal apparatus in three species of Baikal Cottoidei in relation to their feeding
- Author
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Yu. P. Tolmacheva
- Subjects
Mouth opening ,biology ,Ecology ,Pharyngeal apparatus ,General pattern ,%22">Fish ,Aquatic Science ,General Agricultural and Biological Sciences ,Cottidae ,biology.organism_classification ,Predation - Abstract
The structure of the mouth opening and pharyngeal apparatus was studied, and its relation to the feeding pattern in three coastal species of Baikal Cottidae fish was analyzed. Analysis of data demonstrated that the general pattern of structure of the mouth opening and pharyngeal apparatus is similar in the species under study since their food is represented by bottom organisms, mainly by amphipods. Interspecies differences are manifested in an increase in relative values of morphological features and the size of consumed prey. more...
- Published
- 2010
- Full Text
- View/download PDF
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