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 88 - 740 m (Ref. 11284), usually 400 - 500 m (Ref. 5578). 深水域; 21°N - 37°S, 11°E - 77°E (Ref. 114953)
Southeast Atlantic and Western Indian Ocean: in scattered localities from Lüderitz, Namibia round the Cape (South Africa) to central Mozambique; also off Madagascar and Kenya; also found off India and Oman (Ref. 114953).
東南大西洋與西印度洋: 分佈離散從那米比亞的盧德里茲沿著海岬 (南非) 到莫三比克中部; 也外海的馬達加斯加與肯亞。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 192 cm TL 雄鱼/尚未辨别雌雄; (Ref. 114953)
简单描述
型态特徵 | 形态测量图
An all-dark longnose skate with its underside uniformly roughened by small denticles; snout acutely pointed and greatly elongated, and tail moderately stout and not conspicuously swollen; pectoral disc angular and broader than in other longnose skates in the area; no nape thorn (Ref. 5578). Dark grey to blackish above and below, ventral mucous pores black (Ref. 5578).
一个全身黑色的长鼻 鱼它的下面均匀地由于小的细齿而显得粗糙了; 吻尖锐的而且非常延长, 与尾部中等短胖的而不是明显地肥大; 胸盘有角而较宽的超过在区域中的其他长鼻的 鱼中; 没有后颈刺.(参考文献 5578) 深灰色的对黑色的上面与下面, 腹面黏液孔黑色.(参考文献 5578)
Inhabits the outer shelf and upper slope (Ref. 5578). Rarely caught, probably inhabits hard bottoms that are seldom trawled (Ref. 114953). Feeds on bony fish, crabs and squid (Ref. 5578, Ref. 114953). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Males reaches maturity at 125-135 cm TL, females at 170-190 cm TL. Smallest known specimen at 27 cm TL (Ref. 114953) Probably caught by hake trawlers (Ref. 5578).
栖息于外部的大陆架与上层斜坡。 (参考文献 5578) 吃硬骨鱼，螃蟹与乌贼。 (参考文献 5578) 卵生的.(参考文献 50449) 卵在贝壳上有像触角一样的突出。 (参考文献 205) 可能被鳕鱼底拖网捕获了。 (参考文献 5578)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).東南大西洋與西印度洋: 分佈離散從那米比亞的盧德里茲沿著海岬 (南非) 到莫三比克中部; 也外海的馬達加斯加與肯亞。
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: 没有兴趣
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Estimates based on models
Preferred temperature (Ref.
123201): 6.4 - 12.5, mean 10.4 °C (based on 32 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00275 (0.00175 - 0.00433), b=3.20 (3.07 - 3.33), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 4.3 ±0.69 se; based on food items.
回复力 (Ref.
120179): 低的, 最小族群倍增时间4.5 - 14 年 (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
