分類 / 名前
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) >
Rajidae (Skates)
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
Eponymy: These species are named after the research vessel ‘Walther Herwig’, from which all the holotypes were caught. The vessel was named after Walther Herwig (1838–1912), who is regarded as the founder of German fisheries science. (Ref. 128868), visit book page.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
海 底生の; 深さの範囲 55 - 102 m (Ref. 4426). Tropical; 17°N - 15°N
Eastern Central Atlantic: endemic around Cape Verde.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 50.0 cm TL オス/雌雄の選別がない; (Ref. 4426)
Found in shelf waters (Ref. 4426). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
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)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
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インターネットの情報源
モデルに基づく推定値
好ましい温度 (参照
123201): 13.6 - 15.6, mean 14.2 °C (based on 9 cells).
系統多様性指数 (参照
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00288 (0.00132 - 0.00632), b=3.25 (3.08 - 3.42), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
栄養段階 (参照
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
回復力 (参照
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (Fec assumed to be <100).
漁業の脆弱性 (Ref.
59153): Moderate vulnerability (40 of 100).
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