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: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋 深海底的; 深度上下限 400 - 1640 m (Ref. 106604). ; 15°N - 34°S
Eastern Atlantic: off southern Rio de Oro in Western Sahara, Namibia, and South Africa. Probably occurs throughout the area along the deeper West African slope.
大小 / 重量 / 年龄
Maturity: Lm ?  range ? - ? cm
Max length : 82.3 cm TL 雄鱼/尚未辨别雌雄; (Ref. 106604)
简单描述
型态特徵 | 形态测量图
Moderately long snout, small eyes, and a flat disc; tail about as long as body; moderately large, inconspicuous light thorns dorsally and a few on snout; mid-dorsal line of thorns reduced in adolescents and adults (Ref. 5578). Whitish grey to dark grey dorsally, white ventrally with dark rear margins and dark patches on underside of tail (Ref. 5578).
Found in deeper slope waters (Ref. 4426). Feed on cephalopods, mysids and small bony fishes (Ref. 5578). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
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).
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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参考文献养殖养殖信息品种遗传学Electrophoreses遗传率疾病加工NutrientsMass conversion
合作者照片Stamps, Coins Misc.声音神经毒速度泳型鳃区Otoliths脑重体重比眼睛色素
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Estimates based on models
Preferred temperature (Ref.
123201): 3.3 - 6.6, mean 4.3 °C (based on 24 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00288 (0.00177 - 0.00470), b=3.29 (3.16 - 3.42), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
营养阶层 (Ref.
69278): 4.0 ±0.53 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): Moderate to high vulnerability (53 of 100).