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Teleostei >
Siluriformes (Catfishes) >
Sisoridae (Sisorid catfishes) > Sisorinae
Etymology: Gagata: Local fish name, kenyakatta, in Bengal.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性. 熱帶
Asia: India and probably Pakistan.
亞洲: 印度與可能巴基斯坦。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 7.6 cm TL 雄鱼/尚未辨别雌雄; (Ref. 4833)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 1; 背的软条 (总数) : 6; 脊椎骨: 34 - 35. Apparently a small species with a deep body, approximately equal to head length. Eye very large, greater than snout length. Snout blunt; mesethmoid greatly enlarged, more strongly projecting ventrally when compared with congeners. Tympanum large, its width equal to eye diameter. Swim bladder chamber with a greatly expanded dorsal bony roof but no ventral bony enclosure. Jaws with well-developed conical teeth in several irregular rows. Cranial roofing bones more superficial than in any other Nangrina, and covered with thin skin; cranial surface rugose. Posterior cranial fontanel very small, less than 1/3 length of anterior fontanel; lateral fontanels absent; subtemporal fossa absent. Anal fin with 4-5 simple rays, 8-10 branched rays (Ref. 40780).
显然地一个小的种具有一个深的身体, 大约等于头长。 眼非常大又大于吻的长度。 吻钝的; mesethmoid 明显增大, 更强烈突出腹地当与同类相较了。 鼓膜大的, 它的宽度等于眼直径。 泳鳔腔室具有一个很大扩大背部的多骨顶部但是没有腹的多骨附件。 在一些不规则的列中颌部有发展良好的锥形齿。 头盖的顶盖骨更多的表面超过在任何其他的 Nangrina 中, 而且覆盖着薄皮; 头盖的表面多皱纹的。 在后部的头盖囟门非常小的, 少于前面囟门的 1/3 长度; 侧面的囟门不存在; 子当时的窝不存在。 臀鳍有 4-5 单一的鳍条,8-10个分支条.(参考文献 40780)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
亞洲: 印度與可能巴基斯坦。
Roberts, T.R. and C.J. Ferraris Jr., 1998. Review of South Asian sisorid catfish genera Gagata and Nangra, with descriptions of a new genus and five new species. Proc. Calif. Acad. Sci. 50(14):315-345. (Ref. 40780)
人类利用
渔业: 商业性
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00307 - 0.01489), b=3.01 (2.83 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
