أشلاق (القروش و الشفانين) (sharks and rays) >
Torpediniformes (Electric rays) >
Torpedinidae (Electric rays)
Etymology: Torpedo: Latin, torpere = be sluggish (Ref. 45335).
Eponymy: Donald Jacob Baron Mackay (1839–1921), who was born a Dutch national in the Hague, became 11th Lord Reay on the death of his father (1876) and changed his nationality to British (1877). [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري; مياه مخلوطة القاع; نطاق العمق 30 - 50 m (Ref. 4430). Tropical; 15°N - 17°S, 19°W - 14°E (Ref. 114953)
Eastern Atlantic: Senegal to Angola.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 40.0 cm TL ذكر/ مختلط الجنس; (Ref. 114953)
Found in continental shelf in shallow water to at least 15 m deep. Presumably feeds on small invertebrates and fishes (Ref. 114953). Ovoviviparous (Ref. 50449). Males mature at ca. 32 cm TL, females at ca. 35 cm TL (Ref. 114953).
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
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).
Capapé, C. and M. Desoutter, 1990. Torpedinidae. p. 55-58. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4430)
IUCN Red List Status (Ref. 130435: Version 2024-2)
استخدامات بشرية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 19.8 - 25.9, mean 23.6 °C (based on 13 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00665 - 0.03288), b=2.96 (2.77 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 4.2 ±0.7 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (30 of 100).
