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) >
Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335).
More on authors: Müller & Henle.
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋 深海底的; 深度上下限 440 - 1020 m (Ref. 5578). 深水域; - 40°S
Southeast Atlantic: off central Namibia to Agulhas Bank, South Africa.
東南大西洋: 那米比亞中部外海到南非的 Agulhas 邊坡。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 120 cm TL 雄鱼/尚未辨别雌雄; (Ref. 5578)
简单描述
检索表 | 型态特徵 | 形态测量图
A large softnose skate with a broadly triangular, bluntly pointed snout and an angular pectoral disc; tail shorter than body and with a single row of large thorns; upper disc of young with thorns but these are lost with growth (Ref. 5578). Dorsal surface greyish and may have white spots, ventral surface white with dark grey blotches around gill slits, vent and along ventral surface of tail (Ref. 5578). Tail with no color bands (Ref. 5578).
一个大的软鼻 鱼具有一个宽广三角形, 顿尖的吻与一个有角的胸盘; 尾部短于身体而且具有一个单列的大刺; 幼鱼的上体盘有刺，但是这些随着成长被失去。 (参考文献 5578) 背面略灰色与可能白色的斑点, 腹面鳃缝的周围白色的有深灰色的斑块, 排泄孔而且沿着尾部腹面.(参考文献 5578) 尾部没有色彩条纹。 (参考文献 5578)
Found on the upper continental slope (Ref. 27121). A bottom-predator that feeds on bony fishes including hake, jacopever, barracudina and dragonet; also squid, octopus, crabs and prawns (Ref. 5578). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Sometimes caught by hake trawlers (Ref. 5578).
栖息于大陆坡上层了。 (参考文献 27121) 一个底层掠食动物捕食硬骨鱼类包括鳕鱼， jacopever ，梭鱼与鼠鱼; 也捕食乌贼，章鱼，螃蟹与虾.(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) 有时被鳕鱼底拖网捕获了。 (参考文献 5578)
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). Eggs have horn-like projections on the shell (Ref. 205).東南大西洋: 那米比亞中部外海到南非的 Agulhas 邊坡。
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)
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Estimates based on models
Preferred temperature (Ref.
123201): 4.6 - 11.8, mean 5.4 °C (based on 13 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00513 (0.00253 - 0.01042), b=3.12 (2.95 - 3.29), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 4.3 ±0.67 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): High to very high vulnerability (72 of 100).
