أشلاق (القروش و الشفانين) (sharks and rays) >
Rajiformes (Skates and rays) >
Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335).
Eponymy: Professor Laurence ‘Larry’ Robert Richardson (1911–1988) was a British zoologist. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري قاعية المعيشة; نطاق العمق 803 - 2500 m (Ref. 26346). Deep-water; 48°N - 42°S
North Atlantic and South Pacific (Cook Strait, New Zealand), but probably cosmopolitan.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 175 cm TL ذكر/ مختلط الجنس; (Ref. 3167)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
Grey in color; diamond-shaped and without large thorns on body or tail (Ref. 26346).
Found in deepwater on lower parts of continental slopes, on submarine rises and on deep-sea plains adjacent to both (Ref. 3167). Feeds mainly on fishes, with a small amount of shrimps (Ref. 3167). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Minimum depth reported taken from Ref. 3167.
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Oviparous (Ref. 3167). Paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Eggs have horn-like projections on the shell (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)
IUCN Red List Status (Ref. 130435: Version 2024-1)
استخدامات بشرية
مصائد: غير ذات اهمية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 3.6 - 6.1, mean 4.3 °C (based on 43 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00291 - 0.01038), b=3.13 (2.97 - 3.29), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 4.0 ±0.69 se; based on food items.
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
Nutrients (Ref.
124155): Calcium = 2.37 [0.33, 47.38] mg/100g; Iron = 0.234 [0.023, 3.143] mg/100g; Protein = 14.3 [12.5, 16.3] %; Omega3 = 0.382 [0.143, 1.021] g/100g; Selenium = 23.9 [4.2, 108.6] μg/100g; VitaminA = 3.7 [0.2, 51.6] μg/100g; Zinc = 0.235 [0.015, 2.834] mg/100g (wet weight);
![Image of Bathyraja richardsoni (Richardson\](/images/thumbnails/jpg/tn_Baric_u1.jpg "Image of Bathyraja richardsoni (Richardson\")
