Elasmobranchii (tubarões e raias) (sharks and rays) >
Myliobatiformes (Stingrays) >
Gymnuridae (Butterfly rays)
Etymology: Gymnura: Greek, gymnos = naked + Greek, oura = tail (Ref. 45335).
Eponymy: Alfred Herbert Crook (d: 1873) was a biologist and Headmaster of Queen’s College, Hong Kong (1925–1930), who also lectured on biology at the Hong Kong College of Medicine. [...] (Ref. 128868), visit book page.
More on author: Fowler.
Meio ambiente: milieu / Zona climática / intervalo de profundidade / faixa de distribuição
Ecologia
marinhas demersal. Subtropical
Northwest Pacific: known from the type locality, Kowloon, China. Not in Compagno's 1999 checklist (Ref. 35766).
Tamanho / Peso / Idade
Maturidade: Lm ?  range ? - ? cm
Ovoviviparous (Ref. 50449). Better reference needed.
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
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). Distinct pairing with embrace (Ref. 205).
Eschmeyer, W.N. (ed.), 1999. Catalog of fishes. Updated database version of November 1999. Catalog databases as made available to FishBase in November 1999. (Ref. 33021)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2025-2 (Global))
Ameaça para os humanos
Harmless
Uso pelos humanos
Ferramentas
Relatórios especiais
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Fontes da internet
Estimativas baseadas em modelos
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00393 - 0.01841), b=3.08 (2.88 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 3.8 ±0.6 se; based on size and trophs of closest relatives
Resiliência (Ref.
120179): Muito baixo(a), tempo mínimo de duplicação da população maior que 14 anos (Fec assumed to be <10).
Vulnerabilidade da pesca (Ref.
59153): Moderate vulnerability (43 of 100).
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