Elasmobranchii (sharks and rays) > Torpediniformes
(Electric rays) > Narcinidae
Etymology: Narcine: Greek, narke = numbness (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range - 35 m (Ref. 114953), usually - m (Ref. ). Tropical; 0°C - ; 35°N - 10°N, 97°W - 60°W (Ref. 114953)
Western Atlantic: North Carolina to northeastern Brazil, including the Gulf of Mexico, Caribbean Sean and the islands of the West Indies. Not in Compagno's 1999 checklist (Ref. 35766). Reported in Brazil (Ref. 53431).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 65.0 cm TL male/unsexed; (Ref. 114953)
A benthic species on continental and insular shelves. Mainly feeds on invertebrates suction-fed off the bottom. Produces up to 16 embryos during each gestation. Maturity size of males at ca. 23 cm TL; birth size observed to be ca. 9 cm TL (Ref. 114953).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
de Carvalho, M.R., 1999. Systematic revision of the electric ray genus Narcine Henle, 1834 (Chondrichthyes: Torpediniformes: Narcinidae), and the higher-level phylogenetic relationships of the orders of elasmobranch fishes (Chondrichthyes). Unpublished Ph.D. thesis, the City University of New York. (Ref. 31157)
IUCN Red List Status (Ref. 124695)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00468 - 0.02950), b=2.88 (2.67 - 3.09), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.1 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100) .