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Teleostei >
Siluriformes (Catfishes) >
Akysidae (Stream catfishes) > Akysinae
Etymology: Akysis: Derived from Greek, a = without + Greek, kysthos = bladder (Ref. 45335); varius: The specific name is derived from the Latin varius (variable), in allusion to the highly variable number of serrae on the posterior edge of the pectoral spine..
More on authors: Ng & Kottelat.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性. 熱帶
Asia: Mekong basin.
亞洲: 湄公河流域。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 4.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 30857)
背的软条 (总数) : 5 - 6; 臀鳍软条: 8 - 10; 脊椎骨: 31 - 33. Distinguished from all its congeners by the following unique combination of characters: truncate caudal fin; length of caudal peduncle 16.1-19.8% SL; depth of caudal peduncle 6.5-9.3% SL; length of adipose-fin base 25.6-29.5% SL; interorbital distance 42-46% HL; eye diameter 13-20% HL; length of nasal barbel 44-66% HL; straight lateral margins of the head when viewed dorsally; and 0-5 serrae on the posterior edge of the pectoral spine (Ref. 30226).
在独特的组合特徵之后与它所有的同类区分了藉由: 截形尾鳍; 尾柄 16.1-19.8% SL 的长度; 尾柄 6.5-9.3% SL 的深度; 脂鳍基底 25.6-29.5% SL 的长度; 眼间距 42-46% HL; 眼直径 13-20% HL; 鼻触须 44-66% HL 的长度; 头部的直侧面边缘当背面看了; 而且在胸棘的后缘上的 0-5个锯齿.(参考文献 30226)
Hides in decomposing vegetation in stream beds, where it apparently feeds on zooplankton and rotifers (Ref. 30226).
躲在水流床分解植物中, 在哪里它显然地吃浮游动物与轮虫.(参考文献 30226)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
亞洲: 湄公河流域。
Ng, H.H. and M. Kottelat, 1998. The catfish genus Akysis Bleeker (Teleostei: Akysidae) in Indochina, with descriptions of six new species. J. Nat. Hist. 32:1057-1097. (Ref. 30226)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.5 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
