分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (sharks and rays) >
Myliobatiformes (Stingrays)
鰩目 (Stingrays) >
Potamotrygonidae (River stingrays)
河魟科 (River stingrays) > Potamotrygoninae
Etymology: Potamotrygon: Greek, potamos = river + Greek, trygon = a sting ray (Ref. 45335).
More on author: Garman.
Taxonomic Remarks
Nothing is known about its reproductive biology. Additional references: Hartel & Dingerkus (1997), Ferreira et al. (1998), Compagno & Cook (1995).
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 底中水層性; 河川洄游 (Ref. 51243). 熱帶
South America: Middle and lower Amazon River, lower Tocantins River, Pará River, Trombetas River in Brazil.
南美洲: 亞馬遜河中下游, Tocantins 河，帕拉河， Trombetas 河下游。
初熟時的長度 / 大小 / 重量 / 年齡
成熟度: Lm 39.0 range ? - ? cm
Max length : 54.7 cm WD 雄魚/尚未辨別雌雄; (Ref. 94972); 最大體重: 15.0 kg (Ref. 27548)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Fecundity: 1-4 pups; gestation takes 3-4 months (Ref. 52199).南美洲: 亞馬遜河中下游, Tocantins 河，帕拉河， Trombetas 河下游。
de Carvalho, M.R., N. Lovejoy and R.S. Rosa, 2003. Potamotrygonidae (River stingrays). p. 22-28. 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. 36687)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
近危 (NT) (A2cde); Date assessed: 26 December 2024
人類使用
漁業: 低經濟
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基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Generation time: 3.7 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
回復力 (參考文獻
120179): 非常低的, 最小族群倍增時間超過14 年 (Assuming Fec. <10; tm=1.8; K=0.3 (in captivity).).
釣魚的脆弱性 (Ref.
59153): High vulnerability (58 of 100).
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