Common names from other countries
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) >
Rhinopristiformes (Shovelnose rays) >
Rhinobatidae (Guitarfishes)
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335).
More on author: Linnaeus.
Environment: milieu / climate zone / depth range / distribution range
生態学
海; 汽水性の 底生の; 深さの範囲 0 - 100 m (Ref. 12951). Subtropical; 44°N - 17°S, 19°W - 36°E (Ref. 114953)
Eastern Atlantic: southern Bay of Biscay to Angola, including Mediterranean Sea.
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm 87.0, range 79 - ? cm
Max length : 185 cm TL オス/雌雄の選別がない; (Ref. 127374); common length : 80.0 cm TL オス/雌雄の選別がない; (Ref. 3261); 最大公表体重: 26.6 kg (Ref. 127374)
背面の脊椎 (合計) : 0; 肛門の骨: 0. Rostral ridges widely separated over their entire length; anterior nasal lobe reaching to level of inner corner of nostril, posterior nasal flap wide; spiracle with two moderately developed folds, the outer one more prominent; thorns relatively small, present around inner margin of orbits, between spiracles, on shoulders, and along midline of disc and tail; Upper surface khaki-brown, underside white (Ref. 6675).
Inhabits sandy and muddy bottoms, from the intertidal zone to about 100 m. Sometimes near rocky reefs (Ref. 12951). Slow swimming over bottom or partially buried. Feeds on benthic invertebrates, mainly crustaceans and small fishes. Males mature at ca. 56 cm TL, females at ca. 64 cm TL; born at ca. 25 cm TL (Ref. 114953). Ovoviviparous, one or two litters per year with 4-10 embryos.
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). One or two litters per year, of 4-10 embryos (Ref. 6675)
Schneider, W., 1990. FAO species identification sheets for fishery purposes. Field guide to the commercial marine resources of the Gulf of Guinea. Prepared and published with the support of the FAO Regional Office for Africa. Rome: FAO. 268 p. (Ref. 2683)
Human uses
水産業: 商業
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
Preferred temperature (Ref.
115969): 19.2 - 28, mean 26.1 (based on 104 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00164 - 0.00255), b=3.08 (3.01 - 3.15), in cm Total Length, based on LWR estimates for this species (Ref.
93245).
栄養段階 (Ref.
69278): 4.1 ±0.5 se; based on diet studies.
回復力 (Ref.
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (tmax=5; Fec=4).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (66 of 100).
