分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
板鰓亜鋼(サメとエイ類) (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
生態学
海 深海魚; 深さの範囲 440 - 1020 m (Ref. 5578). Deep-water; - 40°S
Southeast Atlantic: off central Namibia to Agulhas Bank, South Africa.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 120 cm TL オス/雌雄の選別がない; (Ref. 5578)
簡単な記述
検索表 | 形態学 | 形態計測学
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).
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).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
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)
Human uses
用具
特記事項
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インターネットの情報源
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).
栄養段階 (Ref.
69278): 4.3 ±0.67 se; based on food items.
回復力 (Ref.
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (72 of 100).
