इलाज़मौबरांकी (शारक और रेज़) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
पर्यावरण: पर्यावरण / जलवायु क्षेत्र / गहराई सीमा / वितरण सीमा
पारिस्थितिकी
समुद्री ड़िमरसल; गहराई सीमा 10 - 380 m (Ref. 6808). Temperate; 60°N - 22°N, 18°W - 24°E
Eastern Atlantic: Shetland Islands to Morocco, Rio de Oro (Western Sahara), and Madeira.
प्रथम परिपक्वता पर लंबाई / आकार / वज़न / आयु
परिपक्व अवधि: Lm 90.2, range 60 - ? cm
Max length : 120 cm TL पुल्लिंग / अलिंग; (Ref. 41333); 125.0 cm TL (female); अधिकतम प्रकाशित वज़न: 14.3 kg (Ref. 40637)
पृष्ठीय रीढ़ (सम्पूर्ण) : 0; गुदा कांटा: 0. Upper surface wholly prickly, except in juveniles; underside only prickly along front margins of disc; orbital thorns separate; a regular median row of 40-45 thorns in juveniles and adult females, interrupted on back in males; 60-90 tooth rows; upper surface ochre, with numerous small dark spots to margins of disc, underside white (Ref. 3167).
Body shape (shape guide): other; Cross section: flattened.
Found on sand and sand-rock bottoms (Ref. 6808). Feed on all kinds of benthic animals (Ref. 3167). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 10.0-14.3 cm long and 5.8-9.0 cm wide (Ref. 41250). About 40-90 eggs are laid per individual every year (Ref. 41250).
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Spawning mainly from February to August with at least 30 egg-cases laid (Ref. 3167). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).
McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)
आईयूसीएन रेड लिस्ट स्थिति (Ref. 130435: Version 2025-2 (Global))
मनुष्यों के लिए ख़तरा
Harmless
मानव उपयोग
मात्स्यिकी: लघु वाणिज्य; आखेट मत्स्य: हां
साधन
विशेष रिपोर्ट
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इंटरनेट स्रोत
मॉडल पर आधारित अनुमान
पसंदीदा तापमान (संदर्भ
123201): 7.1 - 16.2, mean 10.3 °C (based on 462 cells).
जातिवृति विविधता सूचकांक (संदर्भ
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00229 (0.00147 - 0.00357), b=3.26 (3.14 - 3.38), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
ट्रॉफिक स्तर (संदर्भ
69278): 3.8 ±0.61 se; based on food items.
लौटाव (संदर्भ
120179): निम्न, न्यूनतम जनसंख्या दुगनी होने का समय 4.5 - 14 वर्ष। (K=0.12-0.19; tmax=15; Fec=40).
Prior r = 0.20, 95% CL = 0.13 - 0.30, Based on 1 full stock assessment.
मछली पकड़ने की भेद्यता (Ref.
59153): High to very high vulnerability (65 of 100).
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जलवायु भेद्यता (Ref.
125649): High vulnerability (61 of 100).
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पोषक तत्व (Ref.
124155): Calcium = 4.69 [0.73, 84.95] mg/100g; Iron = 0.26 [0.02, 2.99] mg/100g; Protein = 16.7 [13.9, 19.0] %; Omega3 = 0.869 [0.349, 2.113] g/100g; Selenium = 14.8 [3.0, 71.4] μg/100g; VitaminA = 7.7 [0.6, 90.3] μg/100g; Zinc = 0.31 [0.02, 3.43] mg/100g (wet weight);
