Potamotrygon orbignyi, Smooth back river stingray

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Potamotrygon orbignyi (Castelnau, 1855)

Smooth back river stingray
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Image of Potamotrygon orbignyi (Smooth back river stingray)
Potamotrygon orbignyi
Picture by Landines, M.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) > Myliobatiformes (Stingrays) > Potamotrygonidae (River stingrays)
Etymology: Potamotrygon: Greek, potamos = river + Greek, trygon = a sting ray (Ref. 45335).  More on author: Castelnau.

Issue
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).

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 底中水层性; pH range: 6.8 - 7.5.   熱帶; 24°C - 26°C (Ref. 12468)

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

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 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 35.0 cm WD 雄鱼/尚未辨别雌雄; (Ref. 27749); 32.5 cm WD (female); 最大体重: 1.4 kg (Ref. 27749); 最大体重: 1.4 kg

生物学特性     字汇 (例如 epibenthic)

Occurs in stream swamps, floodplain lakes and artificial lagoons. Feeds mainly on insects and benthic crustaceans (Ref. 27749).

出现于水流沼泽,洪泛区湖与人造的泻湖。 主要吃昆虫与底栖的甲壳动物。 (参考文献 27749)

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼

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。

主要参考文献 Upload your references | 参考文献 | 合作者 : Carvalho, Marcelo | 合作者

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)

世界自然保护联盟红皮书 (Ref. 120744)

  最不相关 (LC) ; Date assessed: 24 June 2003

CITES (Ref. 118484)


CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的





人类利用

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 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).
营养阶层 (Ref. 69278):  3.2   ±0.43 se; Based on food items.
回复力 (Ref. 120179):  非常低的, 最小族群倍增时间超过14 年 (Assuming Fec <10).
脆弱性 (Ref. 59153):  Very high vulnerability (89 of 100) .