分类 / 名称
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Incertae sedis
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.
Taxonomic Remarks
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.
环境:氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 居于水底的. 亞熱帶的; 22°C - 26°C (Ref. 35685); 35°S - 36°S
分布
领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
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。
首次成熟时的长度 / 大小 / 重量 / 年龄
成熟度: Lm 3.8  range ? - ? cm
Max length : 7.5 cm TL 雄鱼/尚未辨别雌雄; (Ref. 38376)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 0; 背的软条 (总数) : 12; 臀棘: 0; 臀鳍软条: 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).
Body shape (shape guide): elongated.
完全裸露 (只有在标本 >5 公分TL 中的侧联机显示的鳞片; 头部轮廓圆头的。 色彩是深褐色的,呈绿色的, 腹面是乳黄色的; 在侧面上有一条铜-色彩的条纹。 (参考文献 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).
中等的被大小的鱼被认为是生活于温带的水域的最南方的脂鲤科鱼类了。 幼鱼有非常极小的柔软,而且娇弱的鳞片那是进入使皮肤成为油腻而通常有颗粒状或海棉状的外表的皮肤之内再吸收。 (参考文献 7252)
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
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)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
极度濒危 (CR) (B1ab(i,ii,iii,iv)+2ab(i,ii,iii,iv)); Date assessed: 29 August 2017
人类利用
渔业: 没有兴趣; 水族馆: 商业性
工具
特别资料
下载 XML
网络资源
基于模型的估算
系统发育多样性指数 (参考文献 82804) |
PD50 = 1.0000 [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 (参考文献 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. |
回复力 (参考文献 120179) |
高度, 族群倍增时间少于 15个月 (tm=1). |
渔业脆弱性 (Ref. 59153) |
Low vulnerability (22 of 100). 🛈 |