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).
Eponymy: Alcide Charles Victor Dessalines d’Orbigny (1802–1857) was a traveller, collector, illustrator and naturalist. [...] (Ref. 128868), visit book page.
More on author: Castelnau.
Taxonomic Remarks
A widespread species that may require subdivision. Rosa (1985a) recognizes Potamotrygon dumerilli (Castelnau 1855) and Potamotrygon humerosus Garman 1913 as distinct species, but evidence given is meager. Larger specimens may weigh close to five kg. Reproductive biology studied by Lasso et al. (1997a) in Venezuela; males achieve sexual maturity at 23 cm DL and females at 18.5 cm DL, and females give birth to up to two pups during any time of year. Food consists of fishes, insects and crustaceans. Additional references: Bertin (1939), Sérét & McEachran (1986), Compagno & Cook (1995), Planquette et al. (1996).
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; pH range: 6.8 - 7.5. 熱帶; 24°C - 26°C (Ref. 12468)
South America: Widespread in Amazon and Orinoco River basins and in river systems in Suriname, Guyana and French Guiana.
南美洲: 廣泛分佈於亞馬遜河與奧里諾科河河流域與在蘇利南，蓋亞那與法屬圭亞那的河流域。
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 35.0 cm WD 雄魚/尚未辨別雌雄; (Ref. 27749); 32.5 cm WD (female); 最大體重: 1.4 kg (Ref. 27749); 最大體重: 1.4 kg
Occurs in stream swamps, floodplain lakes and artificial lagoons. Feeds mainly on insects and benthic crustaceans (Ref. 27749).
出現於水流沼澤，洪泛區湖與人造的潟湖。 主要吃昆蟲與底棲的甲殼動物。 (參考文獻 27749)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 廣泛分佈於亞馬遜河與奧里諾科河河流域與在蘇利南，蓋亞那與法屬圭亞那的河流域。
Lasso, C.A., A. Rial B. and O. Lasso-Alcalá., 1997. Notes on the biology of the freshwater stingrays Paratrygon aiereba (Müller & Henle, 1841) and Potamotrygon orbignyi (Castelnau, 1855) (Chondrichthyes: Potamotrygonidae) in the Venezuelan Llanos. aqua, J. Ichthyol. Aquat. Biol. 2(3):39-52. (Ref. 27749)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 21 October 2024
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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 ±0.43 se; based on food items.
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).
釣魚的脆弱性 (Ref.
59153): High vulnerability (58 of 100).
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