أشلاق (القروش و الشفانين) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Rostroraja: Latin, rostrum = beak + Latin, raja, -ae = a sting ray (Ref. 45335).
Eponymy: Juan José Vélez Diéguez is an ichthyologist at Universidad Nacional del Callao, Peru where he is a professor. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / نطاق العمق / distribution range
البيئة
بحري القاع; نطاق العمق 35 - 300 m (Ref. 28023), usually 35 - 140 m (Ref. 9261). Deep-water
Eastern Pacific: Gulf of California and Costa Rica to Colombia and Peru.
الحجم / وزن / العمر
النضج: Lm ? range ? - ? cm
Max length : 83.0 cm TL ذكر/ مختلط الجنس; (Ref. 96339); common length : 60.0 cm TL ذكر/ مختلط الجنس; (Ref. 9261)
Benthic on the continental shelf. Feed on crustaceans, polychaetes and fishes (Ref. 28023). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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)
IUCN Red List Status (Ref. 130435: Version 2025-1)
استخدامات بشرية
أدوات
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (مرجع
123201): 13.3 - 25.3, mean 15.9 °C (based on 90 cells).
Phylogenetic diversity index (مرجع
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00141 - 0.00645), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (مرجع
69278): 3.6 ±0.53 se; based on food items.
المرونه (مرجع
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (53 of 100).
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