分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Characidae (Characins; tetras)
脂鯉科 (Characins; tetras) > Stethaprioninae
Etymology: Gymnocharacinus: Greek, gymnos = naked + Greek, charax = the name of a fish (Ref. 45335).
Eponymy: Dr Frederico Guillermo ‘Carlos’ (Friedrich Wilhelm Carl) Berg (1843–1902) was a Latvian entomologist and naturalist. [...] (Ref. 128868), visit book page.
More on author: Steindachner.
Issue
Illustrated and described in more detail in Steindachner, 1903:18 Pl. 1 (fig. 2). See Géry, 1977:535 and CEAL, 1988:8 for comments. Common names according to Axelrod et al., 1991:1115 and Ortubay & Cussac, 2000:144. Threatened species according to Ortubay & Cussac, 2000:144.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的. 亞熱帶的; 22°C - 26°C (Ref. 35685); 35°S - 36°S
South America: Valcheta stream in Rio Negro basin, Southern Argentina.
南美洲: 在尼格羅河流域的 Valcheta 水流, 南方阿根廷。
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm 3.8 range ? - ? cm
Max length : 7.5 cm TL 雄魚/尚未辨別雌雄; (Ref. 38376)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 0; 背的軟條 (總數) : 12; 臀棘: 0; 臀鰭軟條: 19. Entirely naked (scale only shown on lateral line in specimens > 5 cm TL; head profile obtuse. Color is dark brown, greenish, the belly is cream; there is a copper-colored band on the flanks (Ref. 35685).
完全裸露 (只有在標本 >5 公分TL 中的側線上顯示的鱗片; 頭部輪廓圓頭的。 色彩是深褐色的﹐呈綠色的, 腹面是乳黃色的; 在側面上有一條銅-色彩的條紋。 (參考文獻 35685)
Medium sized fish considered to be the most southern characid living in temperate waters. Young with very tiny soft and delicate scales which are reabsorbed into the skin making the skin greasy and often with granulated or spongy appearance (Ref. 7252).
中等的被大小的魚被認為是生活於溫帶的水域的最南方的脂鯉科魚類了。 幼魚有非常極小的柔軟，而且嬌弱的鱗片那是進入使皮膚成為油膩而通常有顆粒狀或海棉狀的外表的皮膚之內再吸收。 (參考文獻 7252)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 在尼格羅河流域的 Valcheta 水流, 南方阿根廷。
Ortubay, S. and V. Cussac, 2000. Threatened fishes of the world: Gymnocharacinus bergi Steindachner, 1903 (Characidae). Environ. Biol. Fishes 58:144. (Ref. 35685)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
極危 (CR) (B1ab(i,ii,iii,iv)+2ab(i,ii,iii,iv)); Date assessed: 29 August 2017
人類使用
漁業: 沒有興趣; 水族館: 商業性
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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=0.00955 (0.00428 - 0.02132), b=3.12 (2.93 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Generation time: 1.7 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (tm=1).
Fishing Vulnerability (Ref.
59153): Low vulnerability (22 of 100).
