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) >
Torpediniformes (Electric rays)
電鰩目 (Electric rays) >
Narcinidae (Numbfishes)
雙鰭電鰩科 (Numbfishes)
Etymology: Benthobatis: Greek, benthos = depth of the sea + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335); moresbyi: Named for Capt. Moresby of the Indian Navy.
Eponymy: Captain Robert Moresby (1794–1854) of the Indian Navy was a hydrographer, marine surveyor and draughtsman. [...] (Ref. 128868), visit book page.
More on author: Alcock.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 深海底的; 深度上下限 787 - 1071 m (Ref. 48493). 深水域; 15°N - 5°N, 49°E - 77°E (Ref. 114953)
Indian Ocean: Arabian and Laccadive seas (off Travancore coast), Yemen and Somalia; including India (Ref. 118627).
西印度洋: 阿拉伯的與拉克代夫海 (外海的印度特拉凡哥爾海岸).
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 35.1 cm TL 雄魚/尚未辨別雌雄; (Ref. 48493); 39.2 cm TL (female)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Dark brown dorsal and ventral surfaces; ventral entirely dark. Snout elongated, usually more than 1/3 in disc length (preocular snout region 40% in disc length in lectotype). Disc oval, longer than wide. Dorsal fins with long, fleshy bases which are much longer than height of the fin (dorsal fin length 50-55% of fin height). Origin of first dorsal well anterior to posterior tip of pelvic fins, close to mid pelvic length; dorsal fins close together, interdorsal space less than length of dorsal bases. Distance between second dorsal and caudal fins much smaller than length of base of second dorsal fin. Caudal fin extremely elongated, reaching almost 1/2 tail length as measured from posterior tips of pelvic fins; caudal fin length 40.4% of distance between cloaca and caudal fin tip (Ref. 48493).
深褐色的背面與腹面; 腹的完全深色。 吻延長, 通常超過 1/3 在體盤長度中.(preocular 吻區域 40% 在選模式的體盤長度中) 體盤橢圓形, 長度超過寬的。 背鰭具有長又肉質的基底那是遠長過鰭的高度.(背鰭長度 50-55% 的鰭高度) 第一背鰭的起源在腹鰭的後頂端前, 接近腹鰭長度的中央; 背鰭靠攏在一起, 間背片的間隙少於背鰭基底長。 第二背鰭與尾鰭之間的距離遠小於第二背鰭基底的長度。 尾鰭非常地延長, 幾乎達到 1/2 尾部長度當從腹鰭的頂端後緣測量; 尾鰭長度 40.4% 的泄殖腔與尾鰭頂端之間的距離.(參考文獻 48493)
A benthic species on continental slope. Probably suction feeds on bottom-dwelling invertebrates based on its oral morphology. Biology little known. Maturity size uncertain, probably close to 18 cm TL in males (Ref. 114953).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
西印度洋: 阿拉伯的與拉克代夫海 (外海的印度特拉凡哥爾海岸).
de Carvalho, M.R., 1999. A synopsis of the deep-sea genus Benthobatis Alcock, with a redescription of the type species Benthobatis moresbyi Alcock, 1898 (Chondrichthyes, Torpediniformes, Narcinidae). p. 231-255. In Séret B. & J.-Y. Sire [eds]. Proc. 5th Indo-Pac. Fish Conf., Noumea, 1997. (Ref. 48493)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
無危 (LC) ; Date assessed: 09 February 2017
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Estimates based on models
Preferred temperature (Ref.
123201): 2.7 - 6.7, mean 6.3 °C (based on 5 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00470 - 0.02937), b=2.88 (2.66 - 3.10), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.3 ±0.4 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 (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (29 of 100).
