Elasmobranchii (sharks and rays) > Rajiformes
(Skates and rays) > Rajidae
Etymology: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335); eisenhardti: Named after E. Roy Eisenhardt..
More on authors: Long & McCosker.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 757 - 907 m (Ref. 31078). Deep-water
Southeast Pacific: Galapagos Islands. Not in Compagno's 1999 checklist (Ref. 35766).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 38.5 cm TL male/unsexed; (Ref. 31078)
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).
Long, D.J. and J.E. McCosker, 1999. A new species of deep-water skate, Rajella eisenhardti (Chondrichthyes: Rajidae) from the Galápagos Islands. Proc. Biol. Soc. Wash. 112(1):45-51. (Ref. 31078)
IUCN Red List Status (Ref. 126983)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 4.5 - 5.8, mean 5.7 °C (based on 3 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00141 - 0.00645), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.6 ±0.5 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).
Fishing Vulnerability (Ref. 59153
): Low to moderate vulnerability (28 of 100).