Bathyraja trachura, Roughtail skate

Bathyraja trachura (Gilbert, 1892)

Roughtail skate
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Bathyraja trachura   AquaMaps   Data sources: GBIF OBIS
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Image of Bathyraja trachura (Roughtail skate)
Bathyraja trachura
Fotografia de Van Orden, W.

Classificação / Nomes Nomes comuns | Sinónimos | Catalog of Fishes(Género, Espécies) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (tubarões e raias) (sharks and rays) > Rajiformes (Skates and rays) > Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335).
More on author: Gilbert.

Ambiente: milieu / zona climática / intervalo de profundidade / gama de distribuição Ecologia

marinhas batidemersal; intervalo de profundidade 213 - 2550 m (Ref. 80796). Deep-water; 63°N - 22°N, 144°E - 106°W

Distribuição Territórios | Áreas FAO | Ecossistemas | Ocorrências | Mapa dos pontos | Introduções | Faunafri

Northeastern Pacific: from the Bering Sea, south to gthe Gulf of California, Mexico, and to the west to the Sea of Okhotsk.

Tamanho / Peso / Idade

Maturidade: Lm ?  range ? - ? cm
Max length : 91.0 cm TL macho/indeterminado; (Ref. 87722); 89.0 cm TL (female); peso máx. Publicado: 5.0 kg (Ref. 87722); Idade máx. registada: 20 anos (Ref. 87722)

Descrição breve Chaves de identificação | Morfologia | Morfometria

This moderately sized skates (91.0 cm TL) with disc length (28.7-56.7% TL) are distinguished by the following: pectorals broadly rounded, head length short (15.0-24.1% TL), preorbital length short (9.0-13.5% TL) are also distinguished by having the following: claspers short, tips relatively rounded, with large pseudosiphon and a strong, short pseudorhipidion, not reaching the tip, V-shaped cleft, projection absent; teeth in 27-36 rows on upper jaw and in 26-36 rows on lower jaw; pectoral fin radials 81; pelvics 23; total vertebrae 109; dorsal surface is covered with rough prickles, prickles on tail are larger and more robust; thorns on dorsal surface, mature males with alar thorns, no malar thorns, middorsal thorns weak or absent (0-1); nuchal thorns small or obsolete (0-3); tail thorns moderate (21-30); interdorsal thorns are small to occasionally absent (0-1). Colouration: dorsal dark purple, brown, or grey, spiracles occasionally pale, ventral coloration a lighter grey than dorsal surface, often with white blotching on mouth, gills, cloaca, and scattered across the body (Ref. 126515).
Cross section: flattened.

Biologia     Glossário (ex. epibenthic)

Inhabits deeper waters than hardnose skates and reported to prefer medium to cold temperatures and low oxygen environments compared to its congeners. It is found over a wide range of substrates, from fine sediment to rocky environments. Feeds mostly on benthic organisms, including annelids, shrimps, crabs, and fishes, with adults preferring fishes, whereas juveniles consume mostly invertebrates (Ref. 126515). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Reported size at maturity for males 74 cm TL and for females 80 cm TL with males growing to at least 90 cm TL and females at least 89 cm TL; with size at birth 9-16 cm TL. Maximum age reported estimated to be 20 years for males and 17 years for females. Egg cases small in size (6.2-7.8 cm TL), colour dark brown and becoming light golden brown on keels, which are smooth and plush-like when touched. Egg cases with long, slender horns at each corner, curving inwardly and slightly overlap at their tips with a distinct crossbar originating midway along the posterior horns in some specimens (Ref. 126515).

Ciclo de vida e comportamento de acasalamento Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).

Referência principal Carregar as suas referências | Referências | Coordenador : McEachran, John | Colaboradores

Knuckey, J.D.S. and D.A. Ebert, 2022. A taxonomic revision of Northeast Pacific softnose skates (Rajiformes: Arhynchobatidae: Bathyraja Ishiyama). Zootaxa 5142(1):1-89. (Ref. 126515)

Categoria na Lista Vermelha da IUCN (Ref. 130435: Version 2025-2 (Global))

  Preocupação menor (LC) ; Date assessed: 18 September 2023

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para o homem

  Harmless





Utilização humana

FAO - Publication: search | FishSource |

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Fontes da internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Consultar FishWatcher | CISTI | Catalog of Fishes: Género, Espécies | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Árvore da vida | Wikipedia: ir para, procurar | World Records Freshwater Fishing | Registo zoológico

Estimativas baseadas em modelos

Índice de diversidade filogenética
(Ref. 82804)
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00447 (0.00277 - 0.00721), b=3.05 (2.91 - 3.19), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Nível Trófico
(Ref. 69278)
4.0   ±0.7 se; based on size and trophs of closest relatives
Generation time 12.2 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resiliência
(Ref. 120179)
Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Fec assumed to be <100).
Vulnerabilidade da pesca
(Ref. 59153)
High vulnerability (57 of 100). 🛈
Nutrientes
(Ref. 124155)
Calcium = 6.64 [1.31, 32.87] mg/100g; Iron = 0.293 [0.070, 0.933] mg/100g; Protein = 15.7 [13.1, 18.2] %; Omega3 = 0.579 [0.189, 2.290] g/100g; Selenium = 16.2 [4.6, 50.1] μg/100g; VitaminA = 9.31 [2.07, 42.12] μg/100g; Zinc = 0.29 [0.15, 0.54] mg/100g (wet weight);