分类 / 名称
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Gymnotiformes (Knifefishes) >
Apteronotidae (Ghost knifefishes) > Apteronotinae
Etymology: Sternarchorhynchus: Greek, sternon = sternon, + Greek, archos = anus + Greek, rhyngchos = snout (Ref. 45335); gnomus: From the Latin gnomus, meaning dwarf, in allusion to its small body size.
环境:氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 底中水层性; pH range: 6.6 - 7.6. 热带; 28°C - ? (Ref. 56955)
South America: Lower Río Caroni, Venezuela.
南美洲: 低的 Rio Caroni ,委内瑞拉。
大小 / 重量 / 年龄
成熟度: Lm ?  range ? - ? cm
Max length : 15.2 cm TL 雄鱼/尚未辨别雌雄; (Ref. 84053); 13.4 cm TL (female)
简单描述
检索表 | 型态特徵 | 形态测量图
臀鳍软条: 159 - 177. Distinguished from all congeners by the following combination of characters: snout strongly curved; head and mid-dorsum as dark as dorsolateral areas; anal and pectoral fins translucent, without conspicuous distal dark margins; scales present along anterodorsal region of body; 6-7 scales above lateral line at mid-body; 159-177 total anal-fin rays; five branchiostegal rays; greatest body depth 9.3-11.4% of length to end of anal fin; snout to anus 58.4-77.6% of length to end of anal fin; pre-pectoral fin length 34.8-41.0% of HL; snout length 57.6-65.4% of HL; head depth at nape 39.7-44.9% of HL; postocular distance 36.9-41.6% of HL; eye diameter 4.1-7.6% of HL; internarial distance 2.7-7.0% of HL; branchial opening 9.5-12.3% of HL; tail length 10.1-17.4% of length to end of anal fin; tail depth 8.3-13.8% of caudal length (Ref. 56955).
Body shape (shape guide): elongated.
与所有的同类区分了藉由跟随组合特征: 吻强烈的弯曲; 头部与在-之中像背外侧的区域一样的深色背面; 臀鳍与胸鳍半透明的, 没有显著的末梢部的黑边; 鳞片存在的沿着身体的前背部区域; 6-7 鳞片在侧线上面在身体中央; 159-177个总臀鳍棘条; 五个鳃条骨; 最大的体高 9.3-11.4% 的长度臀鳍结束; 对肛门的吻 58.4-77.6% 的长度臀鳍结束; 前胸鳍长度 34.8-41.0% 的 HL; 吻的长度 57.6-65.4% 的 HL; 在后颈 39.7-44.9% 的 HL 的头部深度;眶後的距離 36.9-41.6% 的 HL; 眼直徑 4.1-7.6% 的 HL; internarial 距離 2.7-7.0% 的 HL; 鰓的打開 9.5-12.3% 的 HL; 尾部長度 10.1-17.4% 的長度臀鰭結束; 尾部深度 8.3-13.8% 的尾部長度.(參考文獻 56955)
Inhabits channel with clear water (Ref. 56955); visibility of approximately 2 m and the pH ranging from 6.6-7.6 (Ref. 84053). Feeds on insects such as chironomids, ephemeropterans and trichopterans (Ref. 56955).
栖息于峡道,水质清澈的地方.(参考文献 56955) 吃昆虫例如宝刀鱼, ephemeroptera 与 trichoptera 。 (参考文献 56955)
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: 低的 Rio Caroni ,委内瑞拉。
de Santana, C. D. and R.P. Vari, 2010. Electric fishes of the genus Sternarchorhynchus (Teleostei, Ostariophysi, Gymnotiformes); phylogenetic and revisionary studies. Zool. J. Linn. Soc. 159:223-371. (Ref. 84053)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
极度濒危 (CR) (B1ab(iii)+2ab(iii)); Date assessed: 07 October 2020
人类利用
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基于模型的估算
系统发育多样性指数 (参考文献 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00347 (0.00141 - 0.00851), b=3.06 (2.85 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
营养阶层 (参考文献 69278) |
3.2 ±0.3 se; based on size and trophs of closest relatives |
渔业脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |