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Plesiotrygon iwamae Rosa, Castello & Thorson, 1987

Long-tailed river stingray
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Image of Plesiotrygon iwamae (Long-tailed river stingray)
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drawing shows typical species in Potamotrygonidae.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) > Myliobatiformes (Stingrays) > Potamotrygonidae (River stingrays) > Potamotrygoninae
Etymology: Plesiotrygon: Greek, plesios = near + Greek, trygon = a sting ray (Ref. 45335);  iwamae: Named in honor of the late Brazilian zoologist Satoko Iwama (Ref. 34195).

Issue
Food items consist of fishes (e.g. catfishes), insects, crustaceans and nematodes (Rosa et al., 1987). Nothing is known of its reproductive biology, but pups are free-swimming at least by 12 cm DL. Recent references: Barriga (1991), Wilkens & Dohse (1993), Compagno & Cook (1995), Lovejoy (1996).

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

; 淡水 居于水底的. 熱帶

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

South America: Upper to lower Amazon River basin, from Ecuador to Belém, Brazil, in the Napo, Solimões, Amazonas and Pará rivers.
南美洲: 對亞馬遜河流域下游上游, 從厄瓜多到 Belem 巴西, 在 Napo ， Solimoes ， Amazonas 與帕拉河中。

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 58.0 cm WD 雄鱼/尚未辨别雌雄; (Ref. 34195)

生物学特性     字汇 (例如 epibenthic)

Feeds on small catfishes, insects, decapod crustaceans, and parasitic cestodes and nematodes (Ref. 34195).

吃小的鲶鱼，昆虫，十足目甲壳动物与寄生的条虫与线虫类。 (参考文献 34195)

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼

南美洲: 對亞馬遜河流域下游上游, 從厄瓜多到 Belem 巴西, 在 Napo ， Solimoes ， Amazonas 與帕拉河中。

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

Rosa, R.S., H.P. Castello and T.B. Thorson, 1987. Plesiotrygon iwamae, a new genus and species of neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae). Copeia 1987(2):447-458. (Ref. 34195)

世界自然保护联盟红皮书 (Ref. 130435)

  次级保育类动物, 见 IUCN 红皮书 (VU) (A2cd); Date assessed: 29 March 2021

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的





人类利用

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.7500   [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):  3.4   ±0.46 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).
Fishing Vulnerability (Ref. 59153):  High vulnerability (58 of 100).