(كوسه ها و سپرماهيان) (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.
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
دريايي; لب شور نزديك كف زي; تغييرات عمق 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.
طول در اولین بلوغ / اندازه / وزن / سن
بلوغ: Lm 87.0, range 79 - ? cm
Max length : 185 cm TL جنس نر / بدون خواص جنسي; (Ref. 127374); common length : 80.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 3261); بيشينه وزن گزارش شده: 26.6 kg (Ref. 127374)
خارهاي باله پشتي (کل) : 0; خارهاي باله مخرجي: 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).
Body shape (shape guide): elongated; Cross section: flattened.
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.
چرخه زندگی و رفتار جفتگیری
بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
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)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2 (Global))
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: تجاري
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
تخمینها بر اساس مدلها
شاخص تنوع فیلوژنتیکی (مرجع 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
|
Bayesian length-weight
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a=0.00204 (0.00163 - 0.00255), b=3.08 (3.01 - 3.15), in cm total length, based on LWR estimates for this species (Ref. 93245). |
سطح تروفیک (مرجع 69278) |
4.1 ±0.5 se; based on diet studies. |
|
Generation time |
8.2 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies. |
جهندگی (مرجع 120179) |
پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (tmax=5; Fec=4). |
آسیبپذیری ماهیگیری (Ref. 59153) |
High to very high vulnerability (66 of 100). 🛈 |
طبقه قيمت (Ref. 80766) |
Low.
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مواد مغذی (Ref. 124155) |
Calcium = 20.2 [3.7, 87.7] mg/100g; Iron = 0.646 [0.170, 1.792] mg/100g; Protein = 19.8 [17.7, 21.8] %; Omega3 = 0.236 [0.109, 0.521] g/100g; Selenium = 24.8 [7.5, 65.6] μg/100g; VitaminA = 6.46 [2.60, 15.59] μg/100g; Zinc = 0.552 [0.281, 1.018] mg/100g (wet weight); |