分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (sharks and rays) >
Rajiformes (Skates and rays)
鰩目 (Skates and rays) >
Rajidae (Skates)
鰩科 (Skates)
Etymology: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335); eisenhardti: Named after E. Roy Eisenhardt.
Eponymy: Emil Roy Eisenhardt (d: 1939) is Director Emeritus of the California Academy of Sciences. [...] (Ref. 128868), visit book page.
More on authors: Long & McCosker.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 深海底的; 深度上下限 757 - 907 m (Ref. 31078). 深水域
Southeast Pacific: Galapagos Islands. Not in Compagno's 1999 checklist (Ref. 35766).
東南太平洋: 加拉巴哥群島。 不在 Compagno's 1999 名錄中.(參考文獻 35766)
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 38.5 cm TL 雄魚/尚未辨別雌雄; (Ref. 31078)
Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
卵生的.(參考文獻 50449) 卵在貝殼上有像觸角一樣的突出。 (參考文獻 205)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).東南太平洋: 加拉巴哥群島。 不在 Compagno's 1999 名錄中.(參考文獻 35766)
Long, D.J. and J.E. McCosker, 1999. A new species of deep-water skate, Rajella eisenhardti (Chondrichthyes: Rajidae) from the Galápagos Islands. Proc. Biol. Soc. Wash. 112(1):45-51. (Ref. 31078)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
無危 (LC) ; Date assessed: 05 February 2019
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Estimates based on models
Preferred temperature (Ref.
123201): 4.5 - 5.8, mean 5.7 °C (based on 3 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00141 - 0.00645), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.6 ±0.5 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 低的, 最小族群倍增時間4.5 - 14 年 (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (28 of 100).
