Holocephali (quimeras) (chimaeras) >
Chimaeriformes (Chimaeras) >
Chimaeridae (Shortnose chimaeras or ratfishes)
Etymology: Hydrolagus: hydro-, combining form of hydor (Gr.), water; lagos (Gr.), hare, i.e., “water rabbit,” probably referring to three pairs of tooth plates, which tend to protrude from the mouth like a rabbit’s incisors (See ETYFish); alphus: Greek for a white spot on the skin, referring to noticeable white spot on sides (See ETYFish).
Ambiente: milieu / zona climática / intervalo de profundidade / gama de distribuição
Ecologia
marinhas batidemersal; intervalo de profundidade 600 - 900 m (Ref. 57721). Tropical
Distribuição
Territórios | Áreas FAO | Ecossistemas | Ocorrências | Mapa dos pontos | Introduções | Faunafri
Eastern Central Pacific: Galapagos Islands.
Tamanho / Peso / Idade
Maturidade: Lm ?  range ? - ? cm
Max length : 41.9 cm TL macho/indeterminado; (Ref. 57721); 48.0 cm TL (female)
Assigned to the genus Hydrolagus based upon the absence of an anal fin. Hydrolagus alphus is distinguished by being medium in size (average PCL 321 mm) and uniform dark brown in color with a distinct white spot (4%-6% BDL) on the lateral side above the pectoral fins. Paired fins with bluish hue and white margins. The dorsal spine longer than triangular shaped first dorsal fin and extends beyond the origin of the second dorsal fin when depressed. Eyes large (40.8–44.5% HDL) and pectoral fins reaching to or beyond insertion of pelvic fins when depressed. Pelvic claspers small, not extending beyond distal edge of pelvic fin, and divided distally for one half their length with slender fleshy denticulate tips. The base of second dorsal fin is long, deeply depressed and light colored in the center, anterior and posterior regions dark, considerably greater in height than the white middle region (Ref. 57721).
Body shape (shape guide): elongated.
Ciclo de vida e comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Quaranta, K.L., D.A. Didier, D.J. Long and D.A. Ebert, 2006. A new species of chimaeroid, Hydrolagus alphus sp. nov.(Chimaeriformes: Chimaeridae) from the Galapagos Islands. Zootaxa 1377:33-45. (Ref. 57721)
Categoria na Lista Vermelha da IUCN (Ref. 130435: Version 2025-2 (Global))
Ameaça para o homem
Harmless
Utilização humana
Ferramentas
Relatórios especiais
Descarregue XML
Fontes da internet
Estimativas baseadas em modelos
Índice de diversidade filogenética (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00331 (0.00137 - 0.00798), b=3.07 (2.87 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Nível Trófico (Ref. 69278) |
3.7 ±0.6 se; based on size and trophs of closest relatives |
Resiliência (Ref. 120179) |
Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Deep-water species, few large eggs.). |
Vulnerabilidade da pesca (Ref. 59153) |
Moderate vulnerability (39 of 100). 🛈 |