Nangra assamensis Sen & Biswas 1994
Koshi Nangra
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Nangra assamensis
Picture by Biswas, B.K.
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Picture by Biswas, B.K.
分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopteri > Siluriformes (Catfish) > Sisoridae (Sisorid catfishes) > Sisorinae
Etymology: assamensis: From its shark-like appearance, especially to the shape of the snout.
Etymology: assamensis: From its shark-like appearance, especially to the shape of the snout.
Environment: milieu / climate zone / depth range / distribution range 生态学
; 淡水 居于水底的. 亞熱帶的
分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri
Asia: Ganges and Brahmaputra Rivers in India.
亞洲: 印度。
亞洲: 印度。
大小 / 重量 / 年龄
简单描述 型态特徵 | 形态测量图
背棘 (总数): 1; 背的软条 (总数): 6; 脊椎骨: 35 - 37. Dorsal fin with 6 branched rays; dorsal and pectoral-fin spines with filamentous extensions. Anal fin with 4-5 simple rays, 7-9 branched rays. Snout strongly projecting. Nasal barbel reaching only to posterior margin of orbit; maxillary barbel reaching to end of pelvic fin or to anal-fin origin; maxillary barbel membrane with narrow attachment to cheek and broad attachment to corner of mouth; mental barbels reaching posteriorly to end of head. Vent opens into pouch or pseudovent, with broad membranous opening near pelvic fin tip. Head, body and caudal peduncle slightly more elongate than other congeners (Ref. 40780).
Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
亞洲: 印度。
主要参考文献
Upload your references | 参考文献 | 合作者 | 合作者
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628. (Ref. 58032)
对人类的威胁
无害处的
人类利用
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Estimates based on models
Phylogenetic diversity index (Ref. 82805): PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00603 (0.00329 - 0.01103), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
营养阶层 (Ref. 69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
回复力 (Ref. 120179): 中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
脆弱性 (Ref. 59153): Low to moderate vulnerability (32 of 100) .