分類 / 名稱
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)
真鯊目 (Ground sharks) >
Scyliorhinidae (Cat sharks)
貓鮫科 (Cat sharks) > Scyliorhininae
Etymology: Scyliorhinus: skylion, Greek for dogfish or small shark; rhinus, from rhine (Gr.), rasp, alluding to a shark’s jagged, rasp-like skin (See ETYFish); hachijoensis: Named for the species’ main collection area, Hachijojima Island.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
分布
領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
Northwest Pacific: Japan.
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 41.6 cm TL 雄魚/尚未辨別雌雄; (Ref. 125694); 38.6 cm TL (female)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
This species is distinguished from its congeners by the following characters: anterior nasal flaps not reaching the upper lip (vs. flaps reaching upper lip, and sometimes covering it, in canicula, cervigoni, comoroensis, duhamelii, garmani, stellaris); absence of nasoral grooves and posterior nasal flaps situated posterior to excurrent apertures (vs. present and posterior nasal flaps laterally situated in canicula, duhamelii); mouth length less than half of mouth width (vs. mouth length more than or equal half of mouth width except in torazame, ugoi); anal fin height more than caudal peduncle height (vs. less in boa, duhamelii, torazame, torrei), and greater than or equal to half of mouth width (vs. less than half of mouth width in boa, capensis, duhamelii, haeckelii, hesperius, meadi, torazame, torrei, ugoi); saddles darker than the background color (vs. inconspicuous or absent in boa, cabofriensis, cervigoni, duhamelii, garmani, torrei, and dark lines in retifer). Colouration: body grayish brown to dark brown with well-defined light spots and small dark spots (vs. no spots in retifer, yellow to golden spots in capensis, no light spots in cervigoni, garmani, meadi, retifer, and no dark spots in capensis, comoroensis, hesperius, meadi, torazame, torrei); light spots spiracle-sized or larger (vs. predominantly smaller than spiracles in boa, cabofriensis, canicula, duhamelii, stellaris, ugoi); dark spots smaller than spiracles (vs. predominantly larger than spiracles in cervigoni, duhamelii, garmani, haeckelii, stellaris); number of monospondylous vertebrae 34-36 (vs. counts higher except in duhamelii, torazame, torrei); clasper with hooks (vs. none inn other pecies except torazame); accessory terminal cartilage present (vs. absent in cabofriensis, cervigoni, comoroensis, duhamelii, haeckelii, stellaris, torrei, ugoi); egg case surface with irregularities (vs. smooth in all other species) (Ref. 125694).
Cross section: angular.
The size of males ranged from 29.4-41.6 cm TL (n = 6) and females from 30.1-38.6 cm TL (n = 22); size at first maturity is not precisely defined, but males had well-developed claspers at 34.6 cm TL and females had egg cases at 34.2 cm TL. Reproduction is by single oviparity, one egg case for each oviduct. The egg cases are amber in color, with tendrils and surface irregularities that resemble wrinkles. Maximum case length without tendrils (ML) was 44.6–56.25 mm, and maximum case width was 19.45–22.5 mm (33.4–42.1 %ML) (n = 7). Stomachs contents have small crustaceans, small bony fishes, and polychaets (Ref. 125694),
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Ito, N., M. Fujii, K. Nohara and S. Tanaka, 2022. Scyliorhinus hachijoensis, a new species of catshark from the Izu Islands, Japan (Carcharhiniformes: Scyliorhinidae). Zootaxa 5092(3):331-349. (Ref. 125694)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 06 May 2022
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基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00269 (0.00140 - 0.00518), b=3.21 (3.04 - 3.38), 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): 3.8 ±0.5 se; based on size and trophs of closest relatives
回復力 (參考文獻
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
釣魚的脆弱性 (Ref.
59153): Low to moderate vulnerability (32 of 100).
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