分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
板鰓亜鋼(サメとエイ類) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Scyliorhinidae (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..
Environment: milieu / climate zone / depth range / distribution range
生態学
Northwest Pacific: Japan.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 41.6 cm TL オス/雌雄の選別がない; (Ref. 125694); 38.6 cm TL (female)
簡単な記述
形態学 | 形態計測学
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).
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),
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
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)
Human uses
より多くの情報
共通名の類義語代謝捕食動物生態毒性繁殖成熟放精卵の集合体生産力卵卵の開発
Age/Size成長体長-重さLength-length体長組成形態計測学形態学幼生幼生の動力補充豊度BRUVS
参考文献水産養殖水産養殖の紹介緊張遺伝子のElectrophoreses遺伝病気行列NutrientsMass conversion
協力者画像Stamps, Coins Misc.音シガテラ（食中毒の名前）速度泳ぐ 型式カマOtoliths脳視覚
用具
特記事項
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00263 (0.00139 - 0.00497), b=3.21 (3.04 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.8 ±0.5 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 手段, １．４年～４．４年の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (32 of 100).
