Elasmobranchii (sharks and rays) > Torpediniformes
(Electric rays) > Narcinidae
Etymology: Discopyge: Greek, diskos = disc shape + Greek, pyge = tail (Ref. 45335). More on author: Heckel.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 5 - 165 m (Ref. 38391), usually - m (Ref. ). Subtropical; 0°C - ; 15°S - 56°S, 76°W - 50°W (Ref. 114953)
Southeast Pacific: Peru and Chile (Ref. 5530). Southwest Atlantic: Uruguay and Argentina (Ref. 2806).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 53.8 cm TL male/unsexed; (Ref. 38391); 44.2 cm TL (female); common length : 42.0 cm TL male/unsexed; (Ref. 114953)
A benthic species found on continental shelf. Produces 2-5 pups during each gestation (up to 12 reported from Argentina). Segregates by sex. Maturity size for males at 23-29 cm TL, females probably smaller (at least in Argentina); birth size at 8-9 cm TL (Ref. 114953).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Menni, R.C., R.A. Ringuelet and R.H. Aramburu, 1984. Peces marinos de la Argentina y Uruguay. Editorial Hemisferio Sur S.A. Buenos, Aires, Argentina. 359 p. (Ref. 2806)
IUCN Red List Status (Ref. 124695)
Fisheries: of no interest
Estimates based on models
Preferred temperature (Ref. 115969
): 7.3 - 14.9, mean 10.4 °C (based on 197 cells).
Phylogenetic diversity index (Ref. 82805
= 0.7500 [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
): 3.3 ±0.4 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 (31 of 100) .
Nutrients (Ref. 124155
): Calcium = 35.5 [4.3, 208.5] mg/100g ; Iron = 0.949 [0.183, 3.751] mg/100g ; Protein = 14.7 [10.7, 20.4] % ; Omega3 = 0.317 [0.141, 0.726] g/100g ; Selenium = 20.2 [5.8, 75.4] μg/100g ; VitaminA = 11.6 [2.7, 51.3] μg/100g ; Zinc = 0.717 [0.185, 2.716] mg/100g (wet weight); based on nutrient studies.