Elasmobranchii (tubarões e raias) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335).
Eponymy: Gigas was a giant in Greek mythology, the child of Uranus and Gaea. The name is applied to taxa that are giants of their kind. (Ref. 128868), visit book page.
Environment: milieu / Zona climática / intervalo de profundidade / distribution range
Ecologia
marinhas batidemersal; intervalo de profundidade 300 - 1000 m (Ref. 114953). Deep-water; 19°N - 37°N, 121°E - 142°E (Ref. 114953)
Northwest Pacific: Japan, the East China Sea, and the Philippines.
Tamanho / Peso / Idade
Maturidade: Lm ? range ? - ? cm
Max length : 186 cm TL macho/indeterminado; (Ref. 114953)
Found on sand-mud bottoms of upper continental and insular slopes (Ref. 41299, Ref. 114953). Feed on invertebrates and bony fishes (Ref. 9908, Ref. 114953). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 22.0-23.5 cm long and 14.0-14.5 cm wide (Ref. 41249, 41253). A male holotype reaches maturity at 135 cm TL, females at 115 cm TL (Ref. 114953).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Oviparous (Ref. 9908). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (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)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2025-1)
Uso pelos humanos
Ferramentas
Relatórios especiais
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Fontes da internet
Estimates based on models
Preferred temperature (Ref.
123201): 3.6 - 5.6, mean 4.6 °C (based on 132 cells).
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00131 - 0.00604), b=3.25 (3.08 - 3.42), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 4.0 ±0.62 se; based on food items.
Resiliência (Ref.
120179): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
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