Lớp phụ Cá sụn (cá mập và cá đuối) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Dactylobatus: Greek, daktyleys, -eos = a kind of grey mullet + Greek, batis = a kind of ray (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
Biển Tầng đáy biển sâu; Mức độ sâu 475 - 1000 m (Ref. 28767). Deep-water; 5°S - 31°N, 97°W - 33°W (Ref. 114953)
Western Central Atlantic: northern Gulf of Mexico (Ref. 13608) to South Carolina (Ref. 114953) and northern coast of South America (Ref. 5217).
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?  range ? - ? cm
Max length : 59.0 cm TL con đực/không giới tính; (Ref. 13608); 69.0 cm WD (female)
Inhabits mud-bottom habitat on the upper slope, generally in waters deeper than 350 meters. Mainly feeds on small bony fishes (Ref. 114953). Stomach contents include one specimen of Mullus argentinae, remains of a teleost fish and predominance of Myctophidae fishes. Sympatric with other chondrichthyans, Etmopterus bigelowi, Squalus aff. blainvillei, and Dipturus leptocauda (Ref. 56543). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
Oviparous, 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)
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201): 5.5 - 13, mean 8 °C (based on 76 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [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).
Mức dinh dưỡng (Ref.
69278): 4.5 ±0.80 se; based on food items.
Thích nghi nhanh (Ref.
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Low vulnerability (22 of 100).