分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Gymnotiformes (Knifefishes)
電鰻目 (Knifefishes) >
Apteronotidae (Ghost knifefishes)
無背魚科 (Ghost knifefishes) > Apteronotinae
Etymology: Sternarchorhynchus: Greek, sternon = sternon, + Greek, archos = anus + Greek, rhyngchos = snout (Ref. 45335); britskii: Named after Heraldo A. Britski, who first noted the presence of this species in the upper Parana system (Ref. 36352).
Eponymy: Dr Heraldo Antonio Britski is a Brazilian ichthyologist who was awarded a bachelor’s degree (1960) and a doctorate (1973) by Universidade de São Paulo where he is still a researcher, even though he is officially retired. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
South America: Parana River basin.
南美洲: 巴拉納河流域。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 26.1 cm TL 雄魚/尚未辨別雌雄; (Ref. 36886)
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) : 0; 臀棘: 0; 臀鰭軟條: 166 - 178; 脊椎骨: 80 - 90. Distinguished by its congeners by the following combination of features: length from the tip of the snout to the posterior end of the anal-fin base 92.4-94.4 %TL; mouth length 5.9-7.3 %HL; distance between anterior and posterior nares 2.6-3.1 %HL; eye diameter 3.1-4.1 %HL; postocular distance 40.0-44.4 %HL; pectoral fin length 35.5-41.3 %HL; scales always present above lateral line along anterodorsal region of body; unbranched anterior anal-fin rays 18-22; a white to yellowish white (sometimes indistinct) band on frontal portion of head and middorsum; and pectoral and anal fins hyaline to translucent, without dark distal margins; small ellipsoid caudal fin with 13-15 rays (Ref. 36352).
在特徵的組合之後區別的特徵為它的同類藉由了: 長度從吻尖到臀鰭基底後端 92.4-94.4% TL; 嘴長度 5.9-7.3% HL; 前面與後面的鼻孔 2.6-3.1% HL 之間的距離; 眼直徑 3.1-4.1% HL; 眶後的距離 40.0-44.4% HL; 胸鰭長度 35.5-41.3% HL; 鱗片總是沿著身體的前背部區域位於側線之上; 不分枝的前面臀鰭棘條 18-22; 在頭部與背面中央的前部分上的一條白色到黃白色 (有時不明顯的) 條紋; 而且胸鰭與臀鰭透明的到半透明的, 沒有深色的末梢部的邊緣; 小的橢圓體尾鰭有 13-15個鰭條。 (參考文獻 36352)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 巴拉納河流域。
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)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00145 - 0.00867), b=3.06 (2.85 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.3 ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (16 of 100).
![Image of Sternarchorhynchus britskii (Britski\](/images/thumbnails/gif/tn_APTEROT0.gif "Image of Sternarchorhynchus britskii (Britski\")