Potamotrygon motoro (Müller & Henle, 1841)
South American freshwater stingray
分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Etymology: Potamotrygon: Greek, potamos = river + Greek, trygon = a sting ray (Ref. 45335).
More on authors: Müller & Henle.
Taxonomic Remarks
Authorship of species is credited to Müller & Henle (1841) and not Naterrer (who collected the type specimen) as in Rosa (1985a). A widespread species that may require further subdivision after more study. Studies of its reproductive biology indicate that females attain sexual maturity between 24 and 32 cm DW (males between 20 and 30 cm DW), and may produce from three to 21 embryos per gestation (Achenbach & Achencbach, 1976) or only six or seven (Thorson et al., 1983b; these differences may be populational). Larger specimens may weigh 10 kg. This species has been captively bred in aquaria, but is still the most comercially imported species by the aquarium industry. Additional references: Bertin (1939), Castex & Castello (1970b), Achenbach & Achenbach (1976), Thorson et al. (1983b), Sérét & McEachran (1986), Ortega & Vari (1986), Paepke & Schmidt (1988), Barriga (1991), Compagno & Cook (1995), Lasso et al. (1997a), Ferreira et al. (1998), Britski et al. (1999).
环境：氛围 / 气候带 / 深度上下限 / 分布范围 生态学
分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
南美洲: 烏拉圭, Parana-巴拉圭，奧里諾科河與亞馬遜河流域。
大小 / 重量 / 年龄
Max length : 50.0 cm WD 雄鱼/尚未辨别雌雄; (Ref. 36687); 最大体重: 34.2 kg (Ref. 85107)
发现于淡水的河了。 它是一个非常危险的种。 最大的长度在 Axelrod 等人报告。,1991(参考文献 6398) 是 100 公分TL。
生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
主要参考文献
上传您的参考资料 | 参考文献 | 合作者 : Carvalho, Marcelo | 合作者
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基于模型的估算
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系统发育多样性指数 (参考文献 82804) |
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). |
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营养阶层 (参考文献 69278) |
3.2 ±0.4 se; based on size and trophs of closest relatives |
| Generation time | 6.5 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies. |
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回复力 (参考文献 120179) |
低的, 最小族群倍增时间4.5 - 14 年 (Fec=16). |
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渔业脆弱性 (Ref. 59153) |
Moderate to high vulnerability (53 of 100). 🛈 |
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价格分类 (Ref. 80766) |
Medium. |