19 results on '"Parangipettai"'
Search Results
2. First distributional record of Parascolopsis akatamae Miyamoto, McMahan, & Kaneko, 2020, a dwarf monocle bream (Perciformes, Nemipteridae), from Indian waters.
- Author
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Mahadevan, Gopalan, Murugesan, Perumal, Sreekanth, Giri Bhavan, Kei Miyamoto, and McMahan, Caleb D.
- Subjects
- *
PERCIFORMES - Abstract
New records of Parascolopsis akatamae Miyamoto, McMahan, & Kaneko, 2020 are reported from India's southeast coast. Three specimens were collected in April 2021 on the Parangipettai coast, Tamil Nadu, India. We examined and compared morphometric and meristic characters of our specimens with published data from the holotype. The new India records expand the known distribution of P. akatamae, which had previously been reported from southern Japan, Taiwan, Indonesia, and Thailand. Parascolopsis akatamae is a new addition to the list of marine fishes from Indian coastal waters. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
3. On Global and Multiple Linkages in the Making of an Ordinary Place: Parangipettai-Porto Novo
- Author
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Denis, Eric, Ahmad, Zarin, Zérah, Marie-Hélène, Series editor, and Denis, Eric, editor
- Published
- 2017
- Full Text
- View/download PDF
4. Genetic identification of marine eels through DNA barcoding from Parangipettai coastal waters
- Author
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Samuel Peninal, Janakiraman Subramanian, Alaganatham Elavarasi, and Murugaiyan Kalaiselvam
- Subjects
Barcoding ,COXI ,Marine eels ,Nucleotide analysis ,Anguillidae ,Parangipettai ,Genetics ,QH426-470 - Abstract
Anguilliformes, also known as “true eels”, are an ecologically diverse group of predominantly marine origin whose members were easily recognized by their extremely elongated bodies with reduced cross-sectional areas and universal lack of pelvic fins. The Marine Eels were collected from landing centres of Parangipettai coastal waters and identified based on their morphometric and meristic characters. The newly recorded species were used for the barcoding analysis. Information on molecular taxonomy of marine eels was very meagre and hence, the present study was aimed to study the barcoding of marine eels which were present along the southeast coast of India. The cube of lateral muscle was exercised for DNA isolation followed by its amplification. Cluster IX 2.06 was used to align the nucleotide sequences (Thomson, 1997). The evolutionary history was inferred using the Neighbor-Joining method (Saitou and Nei, 1987). The evolutionary distances were computed using the Maximum Composite Likelihood method (Tamura et al., 2004). The barcodes sequences were submitted in NCBI (National centre for Biotechnological Information). The species within genera of Muraenidae, Muraenesocidae and Ophichthidae family were clustered in a same clade with high bootstrap value. The evolutionary relationships of six species were analyzed using neighbor joining method. This results of phylogenetic tree showed maximum genetic relatedness with the sequenced results which were submitted in gene bank.
- Published
- 2017
- Full Text
- View/download PDF
5. Seasonal variation of atmospheric organochlorine pesticides and polybrominated diphenyl ethers in Parangipettai, Tamil Nadu, India: Implication for atmospheric transport.
- Author
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Chakraborty, Paromita, Zhang, Gan, Li, Jun, Sampathkumar, Pitchai, Balasubramanian, Thangavel, Kathiresan, Kandasamy, Takahashi, Shin, Subramanian, Annamalai, Tanabe, Shinsuke, and Jones, Kevin C.
- Abstract
Abstract Past studies have reported several persistent organic pollutants (POPs) in different environmental matrices from a tropical coastal site, Parangipettai (PI), located along the bank of the Vellar River in Tamil Nadu, south India. Hence to fill the data gap after the strict ban on several POPs, high volume air sampling was conducted in PI to study the variability of atmospheric organochlorine pesticides (OCPs) and polybrominated diphenyl ethers (PBDEs) during summer, pre-monsoon and monsoon seasons. Emission source regions were tracked by using five days back trajectory analysis. Range of air concentrations in pg/m3 were: dichlorodiphenyltrichloroethane (DDT), 13 - 1976; hexachlorocyclohexane (HCH), 260–1135, hexachlorocyclobenzene (HCB), 52–135, chlordanes, 36–135 and endosulfans, 66–1013. Six PBDE congeners ranged between 25 and 155 pg/m3 with the highest concentration in summer followed by pre-monsoon and monsoon. Atmospheric DDT and HCH in PI have drastically reduced from the past report thereby showing the strict ban on agricultural use of these compounds. During monsoon, fresh source of o , p′ ‐DDT, trans ‐chlordane and α‐ endosulfan was evident. Higher level of endosulphan sulfate in PI seems to be likely affected by the air mass, originating from a neighbouring state Kerela, where endosulfan has been extensively used for cashew plantations. Similarly in summer, the day recorded with the highest level of PBDEs, the sample was concurrently impacted by air parcel comprised of two major clusters, 1 (25%) and 2 (49%) that traversed through the metropolitan cities like Bangalore and Chennai. Dominance of BDE-99 over BDE-47 in PI is in line with the PBDE profile reported from Chennai city during similar time frame. Average concentration of tetra and penta BDE congeners in summer samples were nearly 2–3 folds higher than pre-monsoon or monsoon. Given the fact that strong localised sources for heavier BDE congeners are lacking in PI, regional atmospheric transport from the strong emission source regions in Chennai might have impacted PBDE concentration in PI. Graphical abstract Unlabelled Image Highlights • In Parangipettai, atmospheric HCH and DDT concentrations have drastically reduced from the past report. • α -Endosulfan, trans -chlordane and o,p′ -DDT were high during monsoon suggesting fresh source. • Regional atmospheric transport from the metropolitan cities like Chennai and Bangalore is possibly the major contributor for atmospheric PBDEs in Parangipettai. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
6. Recurrence of a marine brachyuran crab, Parapanope euagora (Crustacea: Decapoda: Brachyura: Galenidae) from East Coast of India
- Author
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C. Viswanathan, T.V. Suresh, and V. Elumalai, et al.
- Subjects
recurrence ,crab ,Galenidae ,Parangipettai ,Parapanope ,Decapoda ,Zoology ,QL1-991 - Abstract
Study on the occurrence and distribution of unusual crab species is a matter of fascination for carcinalogists. The present study reports the recurrence of a marine brachyuran crab species Parapanope euagora, of the family Galenidae, after a long period along the East coast of India. During a routine survey, three female ovigerous specimens are caught from Parangipettai coastal waters, southeast coast of India. From the results, after more than ten decades, the species, Parapanope euagora has reappeared in Indian coast revealing its possible, continued existence in Indian waters.
- Published
- 2013
7. Distribution of isopod parasites in Carangid fishes from Parangipettai, Southeast coast of India.
- Author
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Rameshkumar, Ganapathy, Ravichandran, Samuthirapandian, and Ramesh, Mathan
- Abstract
Crustacean parasites absorb their nourishment directly from hosts for feeding. The present study was aimed at collecting information as possible on this so far neglected group of isopod parasites of the Carangid fishes of Parangipettai coastal environment. A very little information is available regarding the isopod parasites of Carangid fishes. In the present study six species of isopods belonging to 3 genera were found on four species of fishes. The distribution of Catoessa boscii is found throughout the year. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
8. Relative condition factor, length-weight relationship, and growth of three-spotted flounder, Pseudorhombus triocellatus from Parangipettai Coast, India
- Author
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Palanivel Bharadhirajan, P. Murugesan, Reza Abbaspour Naderi, Mojtaba Pouladi, Samantham Murugan, and G. Mahadevan
- Subjects
0106 biological sciences ,Growth coefficient ,Veterinary medicine ,Future studies ,Age structure ,Length weight ,parangipettai ,QH301-705.5 ,growth ,pseudorhombus triocellatus ,Flounder ,Plant Science ,Biology ,01 natural sciences ,Condition factor ,Biology (General) ,Molecular Biology ,010604 marine biology & hydrobiology ,length-weight ,india ,04 agricultural and veterinary sciences ,biology.organism_classification ,Pseudorhombus ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Animal Science and Zoology ,condition factor - Abstract
Bharadhirajan P, Mahadevan G, Murugesan P, Murugan S, Pouladi M, Abbaspour Naderi R. 2019. Relative condition factor, length-weight relationship, and growth of three-spotted flounder, Pseudorhombus triocellatus (Bloch & Schneider, 1801) from Parangipettai Coast, India. Biodiversitas 20: 373-379. The three-spotted flounder, Pseudorhombus triocellatus is usually caught as trawl by-catch from Parangipettai coastal waters but regrettably, limited information on its age structure and growth is available. Hence, the present study aims to understand some basic parameters of its biology and growth. A total of 759 specimens (360 males and 399 females) ranging from 4 cm to 13 cm in total length (TL) and 5.26-35.41 g in weight were collected from the trawl catches of Parangipettai and Mudasalodai landing center during January–December 2015. The estimated growth coefficient (b) value for males (2.797) was greater than 3 and for females (3.023) was less than 3. The relative condition factor (Kn) values of females were higher than males except during February, June, and September. The values of asymptotic length (L∞) obtained in this study using various methods didn’t vary significantly (P>0.05). The most appropriate values of asymptotic length (Lα) for males were 137.11 mm and for females were 141.75 mm. The most appropriate values of growth rate (K) for males were 0.397 yr-1 and for females were 0.410 yr-1. The estimated length at age 0 (t0) for males and females were 0.197 mm and 0.292 mm, respectively. The longevity (tmax) of males and females P. triocellatus were 2.04 years and 2.24 years, respectively. The result of this study provides basic information for future studies.
- Published
- 2019
9. Occurrence of parasitic copepods in Carangid fishes from Parangipettai, Southeast coast of India.
- Author
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Rameshkumar, Ganapathy, Ravichandran, Samuthirapandian, and Venmathi Maran, B.
- Abstract
In the present study, 68 fishes were infested out of 544 specimens examined from six different species of Carangid fishes which were collected from Parangipettai coastal waters. Eight species of parasitic copepods were found on gill filaments, body surface and nasal capsule regions. The maximum prevalence was recorded in Carangoides malabaricus (22.5 %) and minimum was noticed in (2.4 %) Selaroides leptolepis. The intensity of infection ranged from 1 to 1.2. Thus, considerable variation in the respiratory area was observed owing to the attachment of parasites in the infected fishes. Caligus sp. and C. epidemicus parasites were attached to body surface and only one Sphyriid sp. parasites were found in nasal capsule region. It is very difficult to estimate the actual harm to fish caused by the presence of parasites; if this is uneasy in cultured fish, it is almost impossible in feral fish populations. It should also be emphasized that the presence of a parasite does not necessarily imply manifestation of a disease. In aquaculture, some parasites are able to reproduce rapidly and heavily infect a large proportion of fish which may lead to diseases with significant economic consequences. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
10. Ecological role of stomatopods (mantis shrimps) and potential impacts of trawling in a marine ecosystem of the southeast coast of India
- Author
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Antony, P.J., Dhanya, S., Lyla, P.S., Kurup, B.M., and Ajmal Khan, S.
- Subjects
- *
MARINE ecology , *TRAWLING , *ECOLOGICAL impact , *TROPHIC cascades , *PREDATORY marine animals , *STOMATOPODA , *CRUSTACEA ,ENVIRONMENTAL aspects - Abstract
Ecosystems are balanced by nature and each component in the system has a role in the sustenance of other components. A change in one component would invariably have an effect on others. Stomatopods (mantis shrimps) are common and ecologically important predatory crustaceans in tropical marine waters. The ecological role of mantis shrimps and potential impacts of trawling in a marine ecosystem were estimated using Ecopath with Ecosim (EwE) Version 5.0 software, by constructing a mass balanced Ecopath model of Parangipettai (Porto Novo) ecosystem. Based on fisheries information from the region, 17 ecological groups were defined including stomatopods. Both primary and secondary data on biomass, P/B, Q/B and diet composition were used as basic inputs. The mass balanced model gave a total system throughput of 14,756tkm−2 year−1. The gross efficiency of 0.000942 indicated higher contribution of lower food chain groups in the fishery though the mean trophic level was 3.08. The immature and developing stage of the ecosystem was indicated by the ratio of total primary production and total respiration (1.832) and the net system production (2643.30tkm−2 year−1). Key indices (flow to detritus, net efficiency and omnivory index), split mortality rates and mixed trophic impact of different ecological groups were obtained from the model. A flow diagram was constructed to illustrate the trophic interactions, which explained the biomass flows in the ecosystem with reference to stomatopods. Two temporal simulations were made, with 10 year durations in the mass balanced Ecopath model by using ecosim routine incorporated in EwE software. The effect of decrease in biomass of stomatopods in the ecosystem was well defined, in the first run with increase in stomatopod fishing mortality, and the group showed a high positive impact on benthopelagic fish biomass increase (129%). The simulation with increase in trawling efforts resulted in the biomass decline of different ecological groups as elasmobranchs to 1%, stomatopods to 2%, crabs and lobsters to 36%, cephalopods to 63%, mackerel to 78%, and shrimps to 89%. Present study warns stomatopod discards and further increase in trawling efforts in the region and it explained the need for ecosystem based fisheries management practices for the sustainability of marine fisheries. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
- View/download PDF
11. New potential host for Ryukyua globosa (Crustacea, Isopoda, Cymothoidae) from Parangipettai, Southeast coast of India.
- Author
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Rameshkumar, Ganapathy, Ramesh, Mathan, and Ravichandran, Samuthirapandian
- Abstract
In the present study Ryukyua globosa parasitic isopod on the marine fishes of the Parangipettai coast are reported. R. globosa was found attached in the gill chamber of Sardinella gibbosa. The attachment position of Ryukyua species differs from that of other member of this genus. Until now, R. globosa was only reported on Amblygaster sirm and A.leiogaster. S.gibbosa is a new host record for R. globosa. R. globosa, branchial parasites, already known from Japan and is now recorded from the Southeast coast of India. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
12. Genetic identification of marine eels through DNA barcoding from Parangipettai coastal waters
- Author
-
Janakiraman Subramanian, Alaganatham Elavarasi, Samuel Peninal, and M. Kalaiselvam
- Subjects
0106 biological sciences ,0301 basic medicine ,Anguillidae ,lcsh:QH426-470 ,010603 evolutionary biology ,01 natural sciences ,Biochemistry ,DNA barcoding ,03 medical and health sciences ,food ,Nucleotide analysis ,Genetics ,COXI ,Neighbor joining ,Muraenesocidae ,Marine eels ,Barcoding ,biology ,Anguilliformes ,Phylogenetic tree ,Ecology ,Regular Article ,Ophichthidae ,biology.organism_classification ,food.food ,lcsh:Genetics ,030104 developmental biology ,Evolutionary biology ,Molecular Medicine ,Parangipettai ,Meristics ,Biotechnology - Abstract
Anguilliformes, also known as “true eels”, are an ecologically diverse group of predominantly marine origin whose members were easily recognized by their extremely elongated bodies with reduced cross-sectional areas and universal lack of pelvic fins. The Marine Eels were collected from landing centres of Parangipettai coastal waters and identified based on their morphometric and meristic characters. The newly recorded species were used for the barcoding analysis. Information on molecular taxonomy of marine eels was very meagre and hence, the present study was aimed to study the barcoding of marine eels which were present along the southeast coast of India. The cube of lateral muscle was exercised for DNA isolation followed by its amplification. Cluster IX 2.06 was used to align the nucleotide sequences (Thomson, 1997). The evolutionary history was inferred using the Neighbor-Joining method (Saitou and Nei, 1987). The evolutionary distances were computed using the Maximum Composite Likelihood method (Tamura et al., 2004). The barcodes sequences were submitted in NCBI (National centre for Biotechnological Information). The species within genera of Muraenidae, Muraenesocidae and Ophichthidae family were clustered in a same clade with high bootstrap value. The evolutionary relationships of six species were analyzed using neighbor joining method. This results of phylogenetic tree showed maximum genetic relatedness with the sequenced results which were submitted in gene bank.
- Published
- 2017
13. Microplastic contamination in salt pans and commercial salts – A baseline study on the salt pans of Marakkanam and Parangipettai, Tamil Nadu, India.
- Author
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Nithin, A, Sundaramanickam, A, Surya, P, Sathish, M, Soundharapandiyan, B, and Balachandar, K
- Subjects
PLASTIC marine debris ,LOW density polyethylene ,SALT ,POLYETHYLENE terephthalate ,SEWAGE ,SALTS - Abstract
We studied the abundance of microplastics from commercial table salts and table salts from salt pans at Marakkanam and Parangipettai, Tamil Nadu, India. Microplastic abundance in the salts collected from salt pans had a range of 3.67 ± 1.54 to 21.33 ± 1.53 nos./10 g of salt which were higher than the microplastics retrieved from the commercial salts which ranged from 4.67 ± 1.15 to 16.33 ± 1.53 nos./10 g of salt. All the microplastics retrieved were fibers which were secondary in origin. Black, red, blue, green, white, brown, and colorless microplastics were observed in the samples. FT-IR results showed that 4 types of polymers, namely, Nylon, Polypropylene (PP), Low Density Polyethylene (LDPE), and Polyethylene Terephthalate (PET) were present in the samples. Domestic and municipal wastewater discharges into the estuaries may contribute to microplastics in the table salts. Our study proves that table salts (processed and unprocessed) are prone to microplastic contamination. • Microplastics are known to enter the human body via table salts. • Processed and unprocessed table salts are prone to contain microplastics. • Groundwater as an alternative to seawater yields lesser microplastic contamination in table salts. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
14. Isolation, identification and characterization of Burkholderia pseudomallei from soil of coastal region of India
- Author
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Prakash, Archana, Thavaselvam, Duraipandian, Kumar, Ashu, Kumar, Ajith, Arora, Sonia, Tiwari, Sapana, Barua, Anita, and Sathyaseelan, Kannusamy
- Published
- 2014
- Full Text
- View/download PDF
15. Assessment of trace metal contamination in the marine sediment, seawater, and bivalves of Parangipettai, southeast coast of India.
- Author
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Satheeswaran, Thangaraj, Yuvaraj, Purushothaman, Damotharan, Palani, Karthikeyan, Velmurugan, Jha, Dilip Kumar, Dharani, Gopal, Balasubramanian, Thangavel, and Kirubagaran, Ramalingam
- Subjects
TRACE metals ,MARINE sediments ,COASTAL sediments ,SEAWATER ,BIVALVES ,SEDIMENT sampling - Abstract
Industrial and domestic discharge into the coastal environment has driven us to propose an integrated approach to delineate stations contaminated with metals on the Parangipettai coast by collecting sediment and seawater samples monthly at 18 stations from 2015 to 2017. Descriptive statistics revealed that the concentrations of some metals in the sediment and seawater samples were beyond the permissible level. Further, factor analysis showed a sampling adequacy of 0.90 with high positive loading for Ni (0.94), Cd (0.91), Co (0.90), Pb (0.89), and Zn (0.87) in sediment samples. The degree of contamination by metals was evaluated using pollution indices. The results of the contamination index revealed that some stations in the study area were moderately polluted, and those of the ecological index showed that open sea was under low risk while other stations were in the moderate-to-high-risk category. The results obtained are essential to establish the reference condition for a comparative study in similar environments in the tropical regions. • Trace metals in sediment and seawater exceeded the permissible level. • Ni, Cd, Co, Pb, and Zn were the most abundant trace metals in studied sediments. • Overall trace metal flow in the present study was in the order of sediment > tissue > seawater in the coastal environment. • The ecological risk index showed open sea was under low-risk while other stations were moderate to a high-risk category. • Some metals in bivalve and tissue samples show beyond the guidelines value in which could affect the next trophic level. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
16. Isolation, identification and characterization of Burkholderia pseudomallei from soil of coastal region of India
- Author
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Archana Prakash, Sonia Arora, Ajith Kumar, Sapana Tiwari, Ashu Kumar, Anita Barua, Duraipandian Thavaselvam, and Kannusamy Sathyaseelan
- Subjects
Ashdown agar ,Soil isolate ,Burkholderia pseudomallei ,Multidisciplinary ,Melioidosis ,biology ,business.industry ,Research ,bacterial infections and mycoses ,medicine.disease ,Isolation (microbiology) ,16S ribosomal RNA ,biology.organism_classification ,Biotechnology ,Northern australia ,medicine ,Emerging infectious disease ,bacteria ,Identification (biology) ,Parangipettai ,Restriction fragment length polymorphism ,business - Abstract
Melioidosis is an emerging infectious disease caused by a free living soil dwelling Gram-negative bacterium Burkholderia pseudomallei. The disease is endemic to most parts of Southeast Asia and northern Australia and the organism has been isolated from moist soil and water. In India clinical cases are recently reported from the states of Tamilnadu, Kerala, Karnataka, Maharashtra, Orissa, Assam, West Bengal, Pondicherry and Tripura. This study is aimed to confirm the prevalence of this important bacterial species in soil samples collected from coastal areas of Tamilnadu. Forty five soil samples from five different sites were collected from Parangipettai, Tamilnadu and screened for the presence of B. pseudomallei. The study confirmed 4 isolates as B. pseudomallei with the help of conventional bacteriological methods and molecular methods that include; 16S rDNA sequencing, B. pseudomallei specific PCR, fli C gene RFLP and MALDI-TOF mass spectrometry based bacterial identification. This study reveals the prevalence and distribution of B. pseudomallei in the soil environment in coastal areas of southern India and further necessitates studies from other parts of the country. It will also be helpful to understand the distribution of B. pseudomallei and to access its epidemiological importance.
- Published
- 2014
- Full Text
- View/download PDF
17. Genetic identification of marine eels through DNA barcoding from Parangipettai coastal waters.
- Author
-
Peninal S, Subramanian J, Elavarasi A, and Kalaiselvam M
- Abstract
Anguilliformes, also known as "true eels", are an ecologically diverse group of predominantly marine origin whose members were easily recognized by their extremely elongated bodies with reduced cross-sectional areas and universal lack of pelvic fins. The Marine Eels were collected from landing centres of Parangipettai coastal waters and identified based on their morphometric and meristic characters. The newly recorded species were used for the barcoding analysis. Information on molecular taxonomy of marine eels was very meagre and hence, the present study was aimed to study the barcoding of marine eels which were present along the southeast coast of India. The cube of lateral muscle was exercised for DNA isolation followed by its amplification. Cluster IX 2.06 was used to align the nucleotide sequences (Thomson, 1997). The evolutionary history was inferred using the Neighbor-Joining method (Saitou and Nei, 1987). The evolutionary distances were computed using the Maximum Composite Likelihood method (Tamura et al., 2004). The barcodes sequences were submitted in NCBI (National centre for Biotechnological Information). The species within genera of Muraenidae, Muraenesocidae and Ophichthidae family were clustered in a same clade with high bootstrap value. The evolutionary relationships of six species were analyzed using neighbor joining method. This results of phylogenetic tree showed maximum genetic relatedness with the sequenced results which were submitted in gene bank.
- Published
- 2016
- Full Text
- View/download PDF
18. First record of Osteomugil perusii (Teleostei: Mugilidae) in Indian waters.
- Author
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Ashiq Ur Rahman, M., Ajmal Khan, S., Lyla, P.S., and Durand, J.-D.
- Subjects
- *
OSTEICHTHYES , *GRAY mullets , *COASTS , *MARINE biodiversity , *AQUATIC biodiversity - Abstract
The long-finned mullet, Osteomugil perusii was caught along the eastern and western coasts of India. The finding of 12 specimens extends the current knowledge about the distribution of this mullet in the western Indo-Pacific to the Indian coast. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
- Full Text
- View/download PDF
19. Electrophoretic and immunotaxonomic studies of three species of marine gastropods from Portonovo coast with reference to population management
- Author
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Kasinathan, R. and Natarajan, R.
- Subjects
Telescopium telescopium ,telectrophoresis ,stock identification ,grastropods ,marine ,India ,Parangipettai ,Biology ,proteins ,Portonovo ,Tamil Nadu ,Cuddalore - Abstract
Electrophoretic and serological studies of foot muscle protein of three species of Cerithiacea (Telescopium telescopium, Cerithidea fluviatilis and C. obtusum) were carried out to understand their relationships. Living specimens were collected from mud flats and mangrove swamps off Portonovo. Polyacrylamide electrophoresis of proteins from foot muscle extract of T. telescopium, C. fluviatilis and C. obtusum showed that the former had a different densitometric profile as well as more number of protein bands; but the later two species showed a closer related pattern as well as lesser number of protein bands. At the same time these two species are distinguished from each other in their total number of bands and Rf values. Immunological studies using micro-Ouchterlony double diffusion tests which absorbed antiserum indicated that C. fluviatilis and C. obtusum were more closely related as revealed by an identity reactions than T. telesopium as shown by non-identity reactions. Results are discussed in relation to ecological and morphological adaptations
- Published
- 1980
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