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) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋 深海底的; 深度上下限 163 - 1200 m (Ref. 11284), usually 450 - 600 m (Ref. 36731). 深水域; 21°N - 37°S, 20°W - 27°E (Ref. 114953)
Eastern Central Atlantic to Southwest Indian Ocean: off Mauritania to South Africa (east to Cape Province) (Ref. 114953).
東大西洋: 茅利塔尼亞到南非。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 115 cm TL 雄鱼/尚未辨别雌雄; (Ref. 114953)
简单描述
检索表 | 型态特徵 | 形态测量图
an all-dark longnose skate with an elongated, acutely triangular snout, and a stout tail - shorter than body and with mid-section swollen sausage-shaped; disc with narrowly rounded outer corners and smooth underside except for small denticles on snout; no thorns on nape or along back (Ref. 5578). Dark brown with irregular dark blotches dorsally; rear end of disc and pelvic fins blackish; underside dark brown with black pores and scattered lighter blotches on disc, at base of pelvic fins, around vent, and on tail (Ref. 5578).
一个全身黑色的长鼻 鱼有一个瘦长的, 锐三角形的吻, 与一矮胖的尾部短于身体而且中段肿大成腊肠形; 狭窄地体盘有圆形的外角与下面平滑的在吻上除了小的细齿; 没有在后颈上的刺或沿着背面.(参考文献 5578) 深褐色的有不规则的黑色斑块背面; 体盘与腹鳍的后端黑色的; 腹面深褐色的在体盘上有黑色的孔与分散的淡色斑块, 在腹鳍基底，排泄孔周围, 与在尾部上.(参考文献 5578)
Occurs in deeper slope waters (Ref. 4426). Feeds on benthic fishes, shrimps and crabs (Ref. 27637, Ref. 114953). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Males reaches maturity at ca. 101 cm TL (Ref. 114953).
出现于更深的斜坡水域。 (参考文献 4426) 吃底栖的鱼，虾与螃蟹。 (参考文献 27637) 卵生的.(参考文献 50449) 卵有在贝壳上的像触角一样的突出。 (参考文献 205)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).東大西洋: 茅利塔尼亞到南非。
McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)
人类利用
渔业: 商业性
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Estimates based on models
Preferred temperature (Ref.
123201): 6.3 - 11.8, mean 7.3 °C (based on 17 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00133 - 0.00596), b=3.25 (3.08 - 3.42), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.8 ±0.66 se; based on food items.
回复力 (Ref.
120179): 低的, 最小族群倍增时间4.5 - 14 年 (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (69 of 100).
