Elasmobranchii (hajar och rockor) (sharks and rays) >
Torpediniformes (Electric rays) >
Narcinidae (Numbfishes)
Etymology: Narcine: Greek, narke = numbness (Ref. 45335).
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina bottenlevande; djupintervall 20 - 70 m (Ref. 114953). Subtropical; 25°N - 3°N, 90°E - 123°E (Ref. 114953)
Northwest Pacific: off northern China, Viet Nam,Taiwan possibly including Philippines and from the Gulf of Thailand (de Carvalho, pers. comm.), probably more widely distributed. Probably synonymous to Narcine maculata. Indian Ocean: Bay of Bengal.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 32.0 cm TL hane/ej könsbestämd; (Ref. 114953)
A benthic species found offshore on inner continental shelf. Size usually smaller to 25 cm TL; birth size at ca. 8 cm TL (Ref. 114953).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
de Carvalho, M.R., L.J.V. Compagno and P.R. Last, 1999. Narcinidae. Numbfishes. p. 1433-1442. In K.E. Carpenter and V.H. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Vol. 3. Batoid fishes, chimaeras and bony fishes. Part 1 (Elopidae to Linophrynidae). FAO, Rome. (Ref. 9912)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Mänskliga användningsområden
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01175 (0.00470 - 0.02937), b=2.88 (2.66 - 3.10), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.1 ±0.3 se; based on size and trophs of closest relatives |
Resiliens (Ref. 120179) |
Låg, lägsta populationsfördubblingstid 4,5-14 år (Assuming fecundity<100). |
Sårbarhet i fisket (Ref. 59153) |
Low vulnerability (17 of 100). 🛈 |