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) >
Carcharhiniformes (Ground sharks) >
Pentanchidae (Deepwater catsharks)
Etymology: Apristurus: a-, Latin privative, i.e., without; pristis, from pristes (Gr.), sawyer (but here meaning saw); oura (Gr.), tail, referring to absence of saw-toothed crest of enlarged dermal denticles along upper edge of caudal fin as found in the closely related Pristiurus (=Galeus). (See ETYFish); breviventralis: brevis (L.), short; ventralis (L.), of the belly, referring to its short abdomen. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋; 深度上下限 1000 - 1120 m (Ref. 97621).
Western Indian Ocean: Gulf of Aden, off Socotra Islands.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 48.5 cm TL 雄魚/尚未辨別雌雄; (Ref. 97621)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
This species of the ‘brunneus group’ of Apristurus is distinguished by the following characters: upper labial furrows distinctly longer than lower ones; first dorsal fin much smaller than second dorsal fin, originating distinctly posterior to level of pelvic-fin insertion; second dorsal-fin insertion clearly anterior to level of anal-fin insertion; snout moderately long, with pointed tip; pre-outer nostril length slightly greater than internarial width, about 0.6-0.8 times interorbital width; very short abdomen; pectoral-pelvic space much shorter than anal-fin base length; pectoral-fin tip posterior to level of midpoint of pectoral-pelvic space; spiral valves 17-19; monospondylous 33-36 and precaudal diplospondylous vertebrae 34-38; dermal denticles small giving a velvety texture to body surface; no enlarged dermal denticles along dorsal margin of caudal fin; claspers without hooks, posterior margin of exorhipidion forming a free lobe; colour of body and fins uniformly medium or dark brown (Ref. 97621).
Maximum size of females is unknown. Smallest paratype (33.7 cm TL) with short and soft claspers of 2.5% TL, ranked as immature (maturity stage 1); while holotype and other paratypes (43.2-47.7 cm TL) with long, fully developed claspers (5.8-8.1% TL), ranked as mature (maturity stage 3) (Ref. 97621).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
Kawauchi, J., S. Weigmann and K. Nakaya, 2014. Apisturus breviventralis, a new species of deep-water catshark (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from the Gulf of Aden. Zootaxa 3881(1):1-16. (Ref. 97621)
IUCN 瀕危狀態 (Ref. 130435)
無危 (LC) ; Date assessed: 08 February 2017
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00176 - 0.00714), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.9 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (39 of 100).
