分类 / Names
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Teleostei >
Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Geryichthys: Because of Dr. Jacques Gery, noted authority on Characoids (Ref. 45335).
Eponymy: Dr Jacques Géry (1917– 2007) was a French physician and ichthyologist. [...] Dr Günther Hans Wenzel Sterba (1922–2021) was a zoologist, ichthyologist and aquarist in the former East Germany. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性. 熱帶
South America: upper Amazon River basin at the region of Iquitos and Ucayali drainage in Peru.
南美洲: 在伊奇多與 Ucayali 流域的區域亞馬遜河流域上游。
大小 / 重量 / 年龄
Maturity: Lm ?  range ? - ? cm
Max length : 3.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 37059)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 在伊奇多與 Ucayali 流域的區域亞馬遜河流域上游。
Buckup, P.A., 2003. Crenuchidae (South American darters). p. 87-95. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 37059)
世界自然保护联盟红皮书 (Ref. 130435: Version 2024-2)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.00479 - 0.03160), b=3.00 (2.77 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.2 ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).