Elasmobranchii (hajar och rockor) (sharks and rays) >
Torpediniformes (Electric rays) >
Narcinidae (Numbfishes)
Etymology: Narcine: Greek, narke = numbness (Ref. 45335).
More on author: Shaw.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
marina bottenlevande; djupintervall 30 - 80 m (Ref. 9912). Tropical; 27°N - 0°N, 78°E - 124°E (Ref. 114953)
Indo–West Pacific; Sri Lanka to south-west China (Hong Kong, Taiwan), and the Philippines.
Size / Vikt / Age
Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm TL hane/ej könsbestämd; (Ref. 114953)
Occurs in inshore continental waters (Ref. 9912). Biology little known (Ref. 9912). Size usually smaller to 35 cm TL. Males reaches maturity smaller than 28 cm TL; born at ca. 13 cm TL (Ref. 114953). Used in Chinese medicine (Ref. 12166).
Life cycle and mating behavior
Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | 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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Verktyg
Special reports
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Estimates based on models
Preferred temperature (Ref.
123201): 23.5 - 28.4, mean 27.5 °C (based on 277 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00476 - 0.02897), 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).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (30 of 100).