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: 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).
環境: 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 居於水底的. 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 / 年齡
成熟度: Lm ?  range ? - ? cm
Max length : 58.0 cm WD 雄魚/尚未辨別雌雄; (Ref. 34195)
Feeds on small catfishes, insects, decapod crustaceans, and parasitic cestodes and nematodes (Ref. 34195).
吃小的鯰魚,昆蟲,十足目甲殼動物與寄生的條蟲與線蟲類。 (參考文獻 34195)
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: 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)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
易受傷害 (VU) (A2cd); Date assessed: 29 March 2021
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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) |
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). |
營養階層 (參考文獻 69278) |
3.4 ±0.46 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) |
Moderate to high vulnerability (49 of 100). 🛈 |