分类 / 名称
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).
Eponymy: Satoko Iwama (d: 1987) was a Brazilian zoologist who was a student and teacher at the Instituto de Botânica, São Paulo. [...] (Ref. 128868), visit book page.
Taxonomic Remarks
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).
环境:氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 居于水底的. 熱帶
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
成熟度: Lm ?  range ? - ? cm
Max length : 58.0 cm WD 雄鱼/尚未辨别雌雄; (Ref. 34195)
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)
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 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。
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: Version 2025-2 (Global))
易受伤害 (VU) (A2cd); Date assessed: 29 March 2021
人类利用
工具
特别资料
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网络资源
基于模型的估算
系统发育多样性指数 (参考文献 82804) |
PD50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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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 (参考文献 69278) |
3.4 ±0.46 se; based on food items. |
回复力 (参考文献 120179) |
非常低的, 最小族群倍增时间超过14 年 (Assuming Fec<10). |
渔业脆弱性 (Ref. 59153) |
Moderate to high vulnerability (49 of 100). 🛈 |