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) >
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.
Environment: milieu / climate zone / depth range / distribution range
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
Maturity: 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).
Life cycle and mating behavior
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 2024-2)
Human uses
用具
特記事項
XMLをダウンロードして下さい
インターネットの情報源
Estimates based on models
Preferred temperature (Ref.
123201): 13.6 - 15.6, mean 14.2 °C (based on 9 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00263 (0.00118 - 0.00585), b=3.26 (3.09 - 3.43), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
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): Moderate vulnerability (40 of 100).
