Elasmobranchii (sharks and rays) > Rajiformes
(Skates and rays) > Rajidae
Etymology: Breviraja: Latin, brevis = short, brief + Latin raja = ray (Raja sp.) (Ref. 45335); marklei: Named after Douglas F. Markle who collected and provided the specimens (Ref. 31389).
Junior synonym of Rajella fyllae<. (Ref. 118749:19). This record will be removed in the next web update of FishBase.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 443 - 988 m (Ref. 31389). Deep-water; 45°N - 42°N
Northwest Atlantic: off Nova Scotia, Canada.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 39.0 cm TL male/unsexed; (Ref. 31389); 45.1 cm TL (female)
Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (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). Eggs have horn-like projections on the shell (Ref. 205).
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
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 3.6 - 4.5, mean 4.3 °C (based on 5 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00145 - 0.00660), b=3.22 (3.04 - 3.40), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.7 ±0.6 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
): Moderate vulnerability (37 of 100) .