Bathyraja trachura, Roughtail skate

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Bathyraja trachura (Gilbert, 1892)

Roughtail skate
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Native range | All suitable habitat | Point map | Year 2050
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Bathyraja trachura   AquaMaps   Data sources: GBIF OBIS
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Image of Bathyraja trachura (Roughtail skate)
Bathyraja trachura
Picture by Van Orden, W.

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranquios (tiburones y rayas) (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.

Environment: milieu / climate zone / depth range / distribution range Ecología

marino batidemersal; rango de profundidad 213 - 2550 m (Ref. 80796). Deep-water; 63°N - 22°N, 144°E - 106°W

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

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

Tamaño / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 91.0 cm TL macho / no sexado; (Ref. 87722); 89.0 cm TL (female); peso máximo publicado: 5.0 kg (Ref. 87722); edad máxima reportada: 20 años (Ref. 87722)

Short description Morfología | Morfometría

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).

Biología     Glosario (por ej. 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).

Life cycle and mating behavior Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva

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).

Main reference Upload your references | Referencias | Coordinador : 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)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 06 March 2015

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

Más información

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Ecosistemas
Ocurrencias, apariciones
Introducciones
Stocks
Ecología
Dieta
componentes alimenticios
consumo de alimento
Ración
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Sinónimos
Metabolismo
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Reproducción
Madurez
Puesta
Agregación para la puesta
Fecundidad
Huevos
Egg development
Age/Size
Crecimiento
Length-weight
Length-length
Length-frequencies
Morfometría
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Larva
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Reclutamiento
Abundancia
BRUVS
Referencias
Acuicultura
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Genética
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heritabilidad
Enfermedades
Procesamiento
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Mass conversion
Colaboradores
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Tipo de natación
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Special reports

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Fuentes de Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Género, Especie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Árbol de la vida | Wikipedia: Go, búsqueda | World Records Freshwater Fishing | Expediente Zoológico

Estimates based on models

Preferred temperature (Ref. 123201): 2.2 - 5.2, mean 3 °C (based on 183 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00269 - 0.00740), b=3.05 (2.91 - 3.19), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Nivel 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.
Resiliencia (Ref. 120179):  Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  High vulnerability (57 of 100).
Nutrients (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);