أشلاق (القروش و الشفانين) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Breviraja: Latin, brevis = short, brief + Latin raja = ray (Raja sp.) (Ref. 45335).
Environment: milieu / climate zone / نطاق العمق / distribution range
البيئة
بحري قاعية المعيشة; نطاق العمق 323 - 675 m (Ref. 13608). Deep-water; 25°N - 35°N, 81°W - 77°W (Ref. 114953)
Western Central Atlantic: South Carolina to Florida, USA (Ref. 114953). Gulf of Mexico to Nicaragua and off Suriname.
الحجم / وزن / العمر
النضج: Lm ? range ? - ? cm
Max length : 23.6 cm WD ذكر/ مختلط الجنس; (Ref. 13608)
Irregular rows of thorns along the midbelt of disc. First and second dorsal fins are confluent. Upper surface light brown with a few whitish blotches. Lower surface plain whitish (Ref. 6902).
Body shape (shape guide): other.
Deep water species (Ref. 6902). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Males reaches maturity at ca. 25 cm TL, females at ca. 29 cm TL; size at birth unknown (Ref. 114953).
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
Last, P.R., S. Weigmann and L. Yang, 2016. Changes to the nomenclature of the skates (Chondrichthyes: Rajiformes). In: Last and Yearsley (eds.). Rays of the World: Supplementary Information. CSIRO Special Publication. 11-34. (Ref. 118749)
IUCN Red List Status (Ref. 130435: Version 2025-1)
استخدامات بشرية
مصائد: bycatch
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (مرجع
123201): 4.7 - 16.1, mean 11.4 °C (based on 56 cells).
Phylogenetic diversity index (مرجع
82804): PD
50 = 0.5312 [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): 3.7 ±0.6 se; based on size and trophs of closest relatives
المرونه (مرجع
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (28 of 100).
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