Elasmobranchii (sharks and rays) > Rajiformes
(Skates and rays) > Arhynchobatidae
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335). More on author: Norman.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 100 - 500 m (Ref. 104534), usually 104 - 159 m (Ref. 104534). Temperate; 45°S - 52°S, 60°W - 55°W (Ref. 104534)
Southwest Atlantic: Uruguay to Argentina (Ref. 58839) and around the Falkland/Malvinas Islands (Ref. 104534).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 111 cm TL male/unsexed; (Ref. 104534)
Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Reportedly taken as bycatch in deeper water benthic trawl and longline teleost target fisheries as well as in target longline skate fishing from off Mar del Plata, Argentina (Ref. 104534).
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
Estimates based on models
Preferred temperature (Ref. 115969
): 3.9 - 6, mean 4.6 °C (based on 27 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00513 (0.00254 - 0.01037), b=3.11 (2.94 - 3.28), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.0 ±0.7 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 to very high vulnerability (71 of 100) .
Nutrients (Ref. 124155
): Calcium = 9.78 [1.23, 57.83] mg/100g ; Iron = 0.216 [0.039, 0.831] mg/100g ; Protein = 15 [14, 17] % ; Omega3 = 0.7 [0.3, 1.8] g/100g ; Selenium = 14.9 [3.5, 53.6] μg/100g ; VitaminA = 19.3 [4.1, 86.0] μg/100g ; Zinc = 0.315 [0.082, 1.136] mg/100g (wet weight); based on nutrient studies.