分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Holocephali
全頭亞綱 (銀鮫科) (chimaeras) >
Chimaeriformes (Chimaeras)
銀鮫目 (Chimaeras) >
Chimaeridae (Shortnose chimaeras or ratfishes)
短鼻銀鮫科 (Shortnose chimaeras or ratfishes)
Etymology: Hydrolagus: hydro-, combining form of hydor (Gr.), water; lagos (Gr.), hare, i.e., “water rabbit,” probably referring to three pairs of tooth plates, which tend to protrude from the mouth like a rabbit’s incisors (See ETYFish); mccoskeri: In honor of American ichthyologist John E. McCosker (b. 1945), California Academy of Sciences, who collected and supplied holotype to the authors (See ETYFish).
Eponymy: Dr John Edward McCosker (d: 1945) is an ichthyologist and evolutionary biologist who is Senior Scientist and first Professor of Aquatic Research at California Academy of Sciences, San Francisco. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / 深度上下限 / distribution range
生態學
海洋 深海底的; 非遷移的 (Ref. 57880); 深度上下限 396 - 506 m (Ref. 57880). 深水域; 1°N - 2°S, 92°W - 89°W (Ref. 57880)
Eastern Central Pacific: Galapagos Is. (Fernandina, Española, Marchena, San Cristóbal Is.).
中太平洋東部: 加拉巴哥島.(Fernandina ， Espanola ， Marchena, 桑河 Cristobal 島)
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 38.1 cm TL (female)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Hydrolagus with head small with short, blunt snout; second dorsal fin only slightly indented along its length; preopercular and oral lateral line canals branching from the same node off the infraorbital canal and sharing a short common branch; dorsum medium brown with numerous narrow, sharply delineated irregular circular and elongate white blotches; ventrum white to tan with extremely fine brown mottling.
Body shape (shape guide): elongated.
Hydrolagus 用頭部小且有短，鈍的吻; 第二背鰭鰭只些微地凹入的沿著它的長度; 前鰓蓋骨與口部的側線管分岐從相同的節外海的眶下管而且分享一個短的共同分枝; 背面普通褐色的有很多的狹窄, 銳利地描述不規則的圓形而且延長白色的斑塊; ventrum 白色到黃褐色的具有非常細的褐色雜斑。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
中太平洋東部: 加拉巴哥島.(Fernandina ， Espanola ， Marchena, 桑河 Cristobal 島)
Barnett, L.A.K., D.A. Didier, D.J. Long and D.A. Ebert, 2006. Hydrolagus mccoskeri sp. nov., a new species of chimaeroid fish from the Galápagos Islands (Holocephali: Chimaeriformes: Chimaeridae). Zootaxa 1328:27-38. (Ref. 57880)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-1)
無危 (LC) ; Date assessed: 02 September 2019
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Estimates based on models
Phylogenetic diversity index (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00331 (0.00137 - 0.00798), b=3.07 (2.86 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.7 ±0.6 se; based on size and trophs of closest relatives
回復力 (參考文獻
120179): 低的, 最小族群倍增時間4.5 - 14 年 (Deep-water species with large eggs and low fecundity).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (28 of 100).
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