7 results on '"Grudpan, Jarungjit"'
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2. Morphological and Histological Study on the Development of the Digestive System of Siamese Spiny Eel, Macrognathus siamensis (Günther, 1861) Larvae.
- Author
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Pongjanyakul, Theerachai, Piwpong, Nitikorn, Payooha, Kanjana, Ngamsnae, Praneet, Leamkom, Thanatip, and Grudpan, Jarungjit
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DIGESTIVE organs ,ALIMENTARY canal ,GASTRIC mucosa ,SYSTEMS development ,EELS - Abstract
Natural populations of the Siamese spiny eel, Macrognathus siamensis (Günther, 1861) have drastically declined while their selling price has been rapidly increasing. For the culture of this species, knowledge of the exact duration of the stages of morphological development of the digestive system would help keepers match appropriate types of food with the changing needs of the larvae. Brood-stocks (10 pairs) of Siamese spiny eel were obtained from the Inland Fisheries Research and Development Regional Center 4 in Ubon Ratchathani Province and artificially induced to spawn by injecting buserelin acetate at 30 µg·kg-1 and domperidone at 10 mg·kg-1. After hatching, 20 fish larvae were serially sampled every two days, from 3 dph (day post hatching) to 40 dph. Fish specimens were fixed in 10% formaldehyde solution and processed for microtome study. Results showed that after hatching, the alimentary canal of the Siamese spiny eel was a straight tube, attached dorsally to the yolk sac. Differentiation of alimentary canal into buccopharynx, esophagus, and anterior and posterior intestine was found at 3 dph, along with the development of other accessory organs, such as liver, pancreas and gall bladder. During 7-9 dph, stomach divided into the cardiac, fundic and pyloric parts. At 11 dph, full development of gastric glands was found along the fundic region, as well as the appearance of the pyloric sphincter, which enabled us to discern the stomach from anterior intestine. From 13 dph until the end of the experiment (40 dph), there was no notable differentiation of the digestive tract except for increasing size. The results suggest that weaning of larvae would be appropriate at 13 dph, according to its fully developed digestive system. [ABSTRACT FROM AUTHOR]
- Published
- 2020
3. Impacts of Dams and Global Warming on Fish Biodiversity in the Indo-Burma Hotspot
- Author
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Kano, Yuichi, primary, Dudgeon, David, additional, Nam, So, additional, Samejima, Hiromitsu, additional, Watanabe, Katsutoshi, additional, Grudpan, Chaiwut, additional, Grudpan, Jarungjit, additional, Magtoon, Wichan, additional, Musikasinthorn, Prachya, additional, Nguyen, Phuong Thanh, additional, Praxaysonbath, Bounthob, additional, Sato, Tomoyuki, additional, Shibukawa, Koichi, additional, Shimatani, Yukihiro, additional, Suvarnaraksha, Apinun, additional, Tanaka, Wataru, additional, Thach, Phanara, additional, Tran, Dac Dinh, additional, Yamashita, Tomomi, additional, and Utsugi, Kenzo, additional
- Published
- 2016
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4. Thryssocypris wongrati Grudpan & Grudpan 2012, sp. nov
- Author
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Grudpan, Chaiwut and Grudpan, Jarungjit
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Cypriniformes ,Thryssocypris ,Actinopterygii ,Cyprinidae ,Animalia ,Biodiversity ,Chordata ,Thryssocypris wongrati ,Taxonomy - Abstract
Thryssocypris wongrati sp. nov. (Figs. 1–3) Holotype. CAS 234133, 50.1 mm SL, Bang Nok Kra-Yang Village, Sap-Phaya, Chai-Nat, Chao Phraya River, 15º08’22.88’’N, 100º08’47.32’’E, 01 November 2008, C. Grudpan et al. Paratypes. CAS 234134, 46.4 mm SL, same data as holotype. MNHN 2012 – 0135, 45.2 mm SL, same data as holotype. KUMF 8793, 46.3 mm SL, Chao Phraya River mainstem in front of Chao Phraya Dam, Chainat, Thailand, 15º09’38.56’’N, 100º11’04.19’’E, 16 September 1997, C. Grudpan et al . KUMF 8794, 7, 42.7–42.8 mm SL, Chao Phraya River mainstem in front of Chao Phraya Dam, Chainat, Thailand, 15º09’38.56’’N, 10º11’04.19’’E, 16 September 1997, C. Grudpan et al . KUMF 8795, 3, 42.3–52.2 mm SL, mainstem of Chao Phraya River in front of Chao Phraya Dam, Chainat, Thailand, 7 July 1994, C. Grudpan et al . UNMF-P06995, 4, 39.0– 46.8 mm SL, same data as holotype. UNMF-P 06996, 46.6 mm SL, Naresuan Dam, Promphiram, Phitsanulok, Nan River, 14º02’45’’N, 100º10’57.86’’E, 6 July 2009, G. Deein et al . RLIKU 1889, 48.6 mm SL, Pra-Sauk, In-Buri, Sing-Buri, Chao Phraya River, 15º0.3’43.3’’N, 100º18’30.1’’E, 12 September 2008, S. Arbsuwan et al. RLIKU 1890, 5, 28.6–37.4mm SL, Chan-Nasutra irrigation canal, along road number 3251, km. 27, Sra-Jaeng, Bang-Rachan, Sing-Buri, 14º54’15.2’’N, 100º13’24.3’’E, 12 September 2008, S. Arbsuwan et al. Diagnosis. Thryssocypris wongrati differs from all other species of Thryssocypris by having the origin of the dorsal fin behind the origin of the anal fin, 37–40 lateral-line scales, 16 circumpeduncular scales, and a dark spot at the base of the caudal fin. It is distinguished from T. smaragdinus in having the origin of the dorsal fin behind (vs. over or in front of) the origin of the anal fin and 16 (vs. 15) circumpeduncular scales, and from T. tonlesapensis and T. ornithosoma in having 37 – 40 (vs. 42–46) lateral-line scales and 39 – 41 (vs. 43 – 45) vertebrae. It further differs from T. ornithosoma by having a dark spot at the base of the caudal fin. Description. Meristic and morphometric characters are given in Tables 1–4. Body elongate and compressed (Figs.1, 2). Head length 17.8–25.0% SL. Snout conical, length 25.4–34.5% HL (Table 4). Mouth terminal; maxilla extending well beyond anterior margin of eye (Fig. 3). Scales thin, deciduous; 37–40 lateral-line scales (Table 2), 23–25 predorsal scales, 16 circumpeduncular scales (Table 1). Dorsal-fin rays 9–10; anal-fin rays 14–16; pectoralfin rays 11–12; pelvic-fin rays 7–9. Anal and dorsal fins closer to caudal fin than to head. Origin of anal fin in front of origin of dorsal fin. Caudal fin deeply forked, rounded tips (Fig.1). Total vertebrae 39–41 (Table 3). Color. In life, T. wongrati has a clear yellow body with a wide metallic silver stripe along the side (Fig. 1), a black spot on the caudal-fin base and black on the proximal portion of the medial caudal-fin rays (Fig. 2). All fins are transparent. In 10% formalin, the body is dark brown. Distribution. Thryssocypris wongrati occupies the lower part of the Chao Phraya Basin where it has been recorded from irrigation canals in Sing-Buri up to the most northern part of the basin in Nan River, Phitsanulok (Fig. 4). In the upper part of Chao Phraya basin it is found in floodplain habitats (Jutagate et al. 2011), irrigation canals, and the river mainstem. Ecology. Most specimens of the new species were collected by large seines with small mesh (2 mm) from open water in the Chao Phraya River mainstem. Some specimens were captured in current in irrigation canals. Schools of this species were observed at the surface of the water, swimming very fast with other species such as Clupeiodes borneensis, Rasbora spp., Barilius koratensis, Paralaubuca spp. and Discherodontus halei. Etymology. T. wongrati is named in honor of Dr. Prachit Wongrat, who was our first teacher in ichthyology. (̝) T. wongrati, (●) T. tonlesapensis, (․) T. smaragdinus, (ˑ) T. ornithostoma. Records are based on material examined (hollow symbols). Type localities are solid symbols. Map is modified from the distribution map for Hypsibarbus in Southeast Asia by Rainboth (1996b)., Published as part of Grudpan, Chaiwut & Grudpan, Jarungjit, 2012, Thryssocypris wongrati, a new anchovy-like cyprinid (Cypriniformes) from the Chao Phraya basin, Thailand, pp. 228-235 in Zootaxa 3586 on pages 229-232, {"references":["Kottelat, M. (1991) Notes on the taxonomy and distribution of some Western Indonesian freshwater fishes, with diagnoses of a new genus and six new species (Pisces: Cyprinidae, Belontiidae, and Chaudhuriidae). Ichthyological Exploration of Freshwaters, 2, 273 - 289.","Jutagate, T, Sa-nguansin, J., Deein, G. & Udduang, S. (2011) Fish Distribution In a River Basin in the Lower Northern of Thailand and Strategy for Conservation Following River Damming. Chiang Mai Journal of Science, 38, 485 - 502.","Rainboth, W. J. (1996 b) The taxonomy, systematics and zoogeography of Hypsibarbus, a new genus of large barbs (Pisces, Cyprinidae) from the rivers of southeastern Asia. University of California Publications in Zoology 129, xiii - 199."]}
- Published
- 2012
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5. Thryssocypris T.R.Roberts & Kottelat 1984
- Author
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Grudpan, Chaiwut and Grudpan, Jarungjit
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Cypriniformes ,Thryssocypris ,Actinopterygii ,Cyprinidae ,Animalia ,Biodiversity ,Chordata ,Taxonomy - Abstract
Key to species of Thryssocypris 1a. Origin of dorsal fin over or in front of origin of anal fin, 14–15 circumpeduncular scales........ Thryssocypris smaragdinus 1b. Origin of dorsal fin behind origin of anal fin, 16–17 circumpeduncular scales...................................... 2 2a. 37–40 lateral-line scales....................................................... Thryssocypris wongrati sp. nov. 2b. 42–46 lateral-line scales................................................................................ 3 3a. Black spot on caudal-fin base, hyaline caudal fin with black on proximal portion of medial caudal-fin rays............................................................................................. Thryssocypris tonlesapensis 3b. No dark spot on caudal-fin base, yellowish caudal fin without black on medial rays........... Thryssocypris ornithostoma, Published as part of Grudpan, Chaiwut & Grudpan, Jarungjit, 2012, Thryssocypris wongrati, a new anchovy-like cyprinid (Cypriniformes) from the Chao Phraya basin, Thailand, pp. 228-235 in Zootaxa 3586 on page 234
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- 2012
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6. Thryssocypris wongrati, a new anchovy-like cyprinid (Cypriniformes) from the Chao Phraya basin, Thailand
- Author
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GRUDPAN, CHAIWUT, primary and GRUDPAN, JARUNGJIT, additional
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- 2012
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7. Dietary protein requirements for growth performance and effects on carcass composition of young Siamese spiny eel, Macrognathus siamensis (Günther, 1861) .
- Author
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Pongjanyakul, Theerachai, Boonngarm, Jongkon, Ngamsnae, Praneet, Payooha, Kanjana, and Grudpan, Jarungjit
- Subjects
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NUTRITIONAL requirements , *WEIGHT gain , *EELS , *DIETARY proteins , *SURVIVAL analysis (Biometry) - Abstract
The study on protein requirement of young Siamese spiny eel, Macrognathus siamensis (GÜnther, 1861) was conducted using six different protein level (35, 40, 45, 50, 55 and 60 % protein) with average gross energy of 450 kcal·100/g. The results demonstrated the maximum specific growth rate (SGR), % weight gain and daily weight gain were achieved at 55% protein while the fishes fed with 35% protein was the lowest. It was estimated by broken line regression that dietary protein level producing maximum growth was 46.50% protein. There was no significant difference (P>0.05) on survival rate amongst treatments. Protein efficiency ratio (PER) and apparent net protein retention (ANPR) were not significantly (P>0.05) affected by diet protein levels. No significant (P>0.05) effect of dietary protein levels was found on carcass moisture, crude protein, crude lipid and ash. However, carcass moisture, protein and ash were apparently increased in all fish groups after feeding trial, comparing to fish before the experiment. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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