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Bathyraja aleutica (Gilbert, 1896)

Aleutian skate
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Native range | All suitable habitat | Point map | Year 2050
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Bathyraja aleutica   AquaMaps   Data sources: GBIF OBIS
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Image of Bathyraja aleutica (Aleutian skate)
Bathyraja aleutica
Picture by Orlov, A.


Canada country information

Common names: Raie aléutienne
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from northern British Columbia (Ref. 96339).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ca.html
National Fisheries Authority: http://www.ncr.dfo.ca/home_e.htm
Occurrences: Occurrences Point map
Main Ref: Love, M.S., C.W. Mecklenburg, T.A. Mecklenburg and L.K. Thorsteinson, 2005
National Database:

Common names from other countries

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (hajar och rockor) (sharks and rays) > Rajiformes (Skates and rays) > Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335);  aleutica: Named for its type locality, Aleutian Islands..
  More on author: Gilbert.

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

marina djupbottenlevande; djupintervall 15 - 1602 m (Ref. 50550).   Deep-water

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

North Pacific: from the Bering Sea, south to Cape Mendocino, northern California, and far west to northern Japan.

Length at first maturity / Size / Vikt / Age

Maturity: Lm 122.0, range 112 - 132 cm
Max length : 161 cm TL hane/ej könsbestämd; (Ref. 56527); 154.0 cm TL (female); publicerad maxvikt: 23.1 kg (Ref. 56527)

Short description Bestämningsnycklar | Morfologi | Morfometri

This large, rhomboidal skates (1,540 mm TL) have long head length 16.7-24.3% TL) and rounded pectoral apices; interdorsal space is large (1.3-3.1% TL); claspers short and stubby, with tip rounded and not bulbous, with weakly defined pseudosiphon, the dorsal lobe has a short pseudorhipidion, U-shaped cleft, while ventral lobe with a rounded projection; teeth in 34-42 rows on upper jaw, and 32-38 rows on lower jaw; pectoral radials 90; pelvic fins 22; total vertebrae 152; dorsal surface of body with fine prickles, becoming larger on the tail, also with thorns, with males having alar thorns, no malar thorns, middorsal thorns developed and high in number (4-11), nuchal thorns strong (3-5), scapular and tail thorns present, interdorsal thorns weak (1-2). Colouration: dorsal dark brown to grey, dark spots on pectorals, often with ocellus on either pectoral fin, while ventral white, with darker coloration on the snout, gills, disc margins, pelvics, and underside of the tail (Ref. 126515).

Biologi     Ordlista (t.ex. epibenthic)

Found in deep waters, on outer continental shelf and upper slope, often over muddy sediments. Reported to feed mainly on benthic crustaceans, including shrimps and crabs, and secondarily on bony fishes (Ref. 126515). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Size at maturity for males 113 cm TL and 125 cm TL for females with males growing to at least 150 cm TL and females grow to about 154 cm TL; reported size at birth is 12-15 cm TL (Ref. 126515). Eggs are deposited in sandy or muddy flats (Ref. 205). Egg capsule measures 120-136 mm long and 73-90 mm wide (Ref. 41249, 41253); golden brown in color, and covered with coarse, striated, and anteriorly-directed prickles, giving it a velvety texture; the cases are with long, curved horns at each corner, with the anterior horns being short and these horns taper and become thin and filamentous at their ends (Ref. 126515).

Life cycle and mating behavior Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

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 | referenser | Koordinator : McEachran, John | Medarbetare

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: 25 November 2014

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

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Ytterligare information

Trophic ecology
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Internet-källor

Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes(Släkte, Arter) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, sök) | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 1.3 - 5.1, mean 2.3 (based on 239 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00316 (0.00214 - 0.00467), b=3.11 (2.99 - 3.23), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trofisk nivå (Ref. 69278):  4.1   ±0.76 se; based on food items.
Resiliens (Ref. 120179):  Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).