Lớp phụ Cá sụn (cá mập và cá đuối) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335).
More on authors: Beebe & Tee-Van.
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
Biển gần đáy. Tropical; 0°N - 4°S, 83°W - 79°W (Ref. 114953)
Southeast Pacific: known from the type locality, San Helena Bay, Ecuador.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?  range ? - ? cm
Max length : 39.0 cm TL con đực/không giới tính; (Ref. 114953)
A demersal species with unknown depth distribution but presumably inhabits outer continental shelf and/or upper slope (Ref. 114953). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Length of specimen (39 cm TL) was based on a young male observed to have developed state of thorn patches on pectoral fins, and presumambly approaching maturity (Ref. 114953).
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).
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
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00133 - 0.00596), b=3.25 (3.08 - 3.42), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.7 ±0.6 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (29 of 100).