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) >
Dasyatidae (Stingrays) > Urogymninae
Etymology: Urogymnus: Greek, oura = tail + Greek, gymnos = naked (Ref. 45335).
More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水; 半咸淡水 居于水底的; 河川洄游 (Ref. 51243). 熱帶; 25°N - 20°S
Asia and Oceania: Mekong and Chao Phraya basins; also from eastern Borneo, New Guinea and northern Australia.
亞洲與大洋洲: 湄公河與湄南河流域; 也從婆羅洲東部，新幾內亞與澳洲北部。
Length at first maturity / 大小 / 重量 / 年龄
Maturity: Lm ?, range 110 - ? cm
Max length : 240 cm WD 雄鱼/尚未辨别雌雄; (Ref. 27732); 最大体重: 600.0 kg (Ref. 6871)
背棘 (总数) : 0. Absence of ventral and dorsal skin folds on the tail, and the broad greyish to blackish marginal band on the ventral surface of the disc. The dorsal surface of the disc is brown (Ref. 27732). Spiral valve with 21 turns; dorsal surface with uniform brown or grey coloration (Ref. 12693). Lacking caudal fin; with long whip-like tail (Ref. 43281).
没有腹而背部的皮肤在体盘的腹面上的尾部 , 与宽的灰色到黑色的边缘条纹上摺叠。 体盘的背部表面是褐色。 (参考文献 27732) 具有 21个旋转的螺旋形的瓣膜; 背面有全褐色的或灰色的颜色.(参考文献 12693) 缺乏尾鳍; 有长的鞭状尾部。 (参考文献 43281)
Inhabits sandy bottoms in estuaries and large rivers (Ref. 12693). Feeds on benthic invertebrates (Ref. 12693) and fishes (Ref. 32457). Ovoviviparous (Ref. 50449). Caught occasionally by demersal gillnet and longline fisheries operating in riverine and estuarine areas. Utilized for its meat and possibly its cartilage (Ref.58048). Marketed fresh, with large individuals being sold in cut pieces by the kilogram (Ref. 12693). Size reaches to about 500 cm TL. Threatened due to over harvesting and pollution (Ref. 58490).
在河口与大河中栖息于砂质底部。 (参考文献 12693) 吃底栖的无脊椎动物 (参考文献 12693) 与鱼。 (参考文献 32457) 卵胎生的.(参考文献 50449) 在市场上销售生鲜地了, 有大的被卖切成一公斤的肉片的个体.(参考文献 12693) 大小达到大约 500 公分TL 。
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). Distinct pairing with embrace (Ref. 205). Young are born at about 30 cm disc width (Ref. 6871).亞洲與大洋洲: 湄公河與湄南河流域; 也從婆羅洲東部，新幾內亞與澳洲北部。
Rainboth, W.J., 1996. Fishes of the Cambodian Mekong. FAO species identification field guide for fishery purposes. FAO, Rome, 265 p. (Ref. 12693)
世界自然保护联盟红皮书 (Ref. 130435)
濒危 (EN) (A2bcd); Date assessed: 25 January 2021
人类利用
渔业: 低经济; 养殖: 实验的; 水族馆: 潜在的
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特别资料
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00366 - 0.01891), b=3.10 (2.90 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.5 ±0.37 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): Very high vulnerability (90 of 100).
