This website uses cookies to enhance your browsing experience and ensure the functionality of our site. For more detailed information about the types of cookies we use and how we protect your privacy, please visit our Privacy Information page.
×
Cookie Settings
This website uses different types of cookies to enhance your experience. Please select your preferences below:
Elasmobranchii (tubarões e raias) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) > Squalidae (Dogfish sharks)
Etymology: Squalus:Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436); formosus:The epithet formosus is based on the Portuguese word Formosa, an alternative name for Taiwan, in allusion to the type locality of this species.
Meio ambiente: milieu / Zona climática / intervalo de profundidade / faixa de distribuição Ecologia
Pacific Ocean: Taiwan and Japan. Type specimens were collected from the fish landing site at Tashi (c. 24‹ 50Œ S) in north-eastern Taiwan, but depth of capture unknown. Also recorded from waters off Kyushu (c. 32‹ N) and Shikoku (c. 33‹ 20Œ N) (Chen et al., 1979).(Ref. 87791).
Tamanho / Peso / Idade
Maturidade: Lm? range ? - ? cm Max length : 73.4 cm TL macho/indeterminado; (Ref. 87791); 81.4 cm TL (female)
Descrição suscinta Chaves de identificação | Morfologia | Morfometria
A medium-sized species of Squalus of the ‘highfin megalops group’ is characterized by the following combination of characters: snout relatively short; first dorsal fin tall and upright, upper posterior margin almost straight; caudal fin with broad white posterior margin, no dark caudal bar; flank denticles tricuspid. These characters clearly differentiate this species from the three other sympatric Squalus species. Squalus formosus is morphologically closest to S. albifrons from eastern Australia but differs in the following characters: first dorsal fin with a distinct, broad white anterior margin (v. no distinct white marking); second dorsal fin height 5.7–6.4 v. 4.3–5.1% LT; first dorsal fin height 9.0–10.5 v. 7.7–8.9% LT, anterior margin 12.4–14.6 v. 10.9–12.7% LT; eye slightly larger 4.8–5.3 v. 4.4–4.8% LT. Squalus formosus can be further distinguished from other Squalus species in the following combination of characters: pre-second dorsal length 3.7–4.4 times pectoral-fin anterior margin; preoral length 2.2–2.3 times horizontal prenarial length; head length 4.0–4.7 times eye length; interorbital width 1.4–1.6 times horizontal preorbital length; posterior margin of second dorsal fin deeply concave; second dorsal-fin spine with a broad base; dorsal surface of head dark, sharply demarcated from paler ventral surface; 45–46 monospondylous centra, 94–95 precaudal centra, 123–124 total centra; adult maximum size at least 73 cm LT (Ref. 87791). Body shape (shape guide): elongated; Cross section: circular.
Ciclo de vida ou comportamento de acasalamento Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
White, W.T. and S.P. Iglésias, 2011. Squalus formosus, a new species of spurdog shark (Squaliformes: Squalidae), from the western North Pacific Ocean. J. Fish Biol. 79:954-968. (Ref. 87791)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2025-2 (Global))
Ecologia Trófica Itens alimentares (presas) Composição da dieta Consumo alimentar Rações alimentares Predadores
Ecologia Ecologia
Dinâmica populacional Parâmetros de crescimento Idade máxima / tamanhos Relação comprimento-peso. Relação comprimento-comprimento. Frequências de comprimento Conversão de massa Recrutamento Abundância
Ciclo de vida Reprodução Maturidade Maturidade/Rel. das guelras Fecundidade Desova Agregações de desova Ovos Desenvolvimento dos ovos Larvas Dinâmica larval
Fisiologia Composição corporal Nutrientes Consumo de oxigênio Tipo de natação Velocidade de natação Pigmentos visuais Som de peixe Doenças e Parasitas Toxicidade (LC50s)
Índice de diversidade filogenética (Ref. 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00347 (0.00163 - 0.00737), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Nível Trófico (Ref. 69278): 4.3 ±0.3 se; based on size and trophs of closest relatives
Vulnerabilidade da pesca (Ref. 59153): Moderate to high vulnerability (53 of 100). 🛈
