Elasmobranchii (sharks and rays) > Rajiformes
(Skates and rays) > Rajidae
Etymology: Amblyraja: Greek, amblys = darkness + Latin, raja, -ae = ray (Raja sp.) (Ref. 45335). More on author: Garman.
Junior synonym of Amblyraja hyperborea according to Ref. 118749. This record wll be removed in the next update of FishBase.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 1061 - 2322 m (Ref. 80796), usually 1100 - 2300 m (Ref. 9261). Deep-water
Eastern Pacific: Gulf of Panama. Western Pacific: Tohoku Slope and Okhotsk Slope. Reported from British Columbia, Canada (Ref. 6885).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 86.0 cm TL male/unsexed; (Ref. 9261); 100.0 cm TL (female)
Occurs on the continental slope (Ref. 9261). Oviparous (Ref. 50449). Produces horny-shelled eggs (Ref. 205).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Fisheries: of no interest
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 1.9 - 3.1, mean 2.3 °C (based on 529 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00144 - 0.00663), b=3.22 (3.05 - 3.39), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.2 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Vulnerability (Ref. 59153
): High vulnerability (58 of 100) .