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Teleostei >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Pristellinae
Etymology: Gymnocorymbus: Greek, gymnos = naked + Greek,korymb = summit, cluster of fruits and flowers (Ref. 45335).
Eponymy: Dr Carl Ternetz (1870–1928) was a Swiss-born ichthyologist and naturalist who first collected near Basel (1892) and subsequently collected in South America over a period of more than thirty years (from c. [...] (Ref. 128868), visit book page.
More on author: Boulenger.
Taxonomic Remarks
See Britski et. al. (1999:32) for description.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 大洋性; pH range: 6.0 - 8.0; dH range: 5 - 19. 亞熱帶的; 20°C - 26°C (Ref. 1672); 11°S - 30°S, 64°W - 48°W
South America: Paraguay and Guaporé River basins to Argentina (Ref. 9086).
南美洲: 巴拉圭與 Guapore 河到阿根廷流域.(參考文獻 9086)
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 7.5 cm SL 雄魚/尚未辨別雌雄; (Ref. 81048)
Adults occur in the middle and upper water layers. They feed on worms, small crustaceans and insects (Ref. 7020). Migratory behaviour is undetermined (Ref. 126106). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm (Ref. 51150).
出現於中央與上層水域。 吃蠕蟲，小型甲殼動物與昆蟲。 (參考文獻 7020) 水族館保持: 形成 5個或更多個體的群體; 水族館最小體型 60 公分.(參考文獻 51150)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 巴拉圭與 Guapore 河到阿根廷流域.(參考文獻 9086)
Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. …, 2003. Genera Incertae Sedis in Characidae. p. 106-168. 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. 38376)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 04 March 2021
人類使用
漁業: 高經濟性; 水族館: 高經濟性
工具
特別的報告
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網路資源
基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00791 - 0.05033), b=2.97 (2.75 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.1 ±0.32 se; based on food items.
回復力 (參考文獻
120179): 高度, 族群倍增時間少於 15個月 (tm<1).
釣魚的脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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