Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes(Genere, Specie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchi (squali e razze) (sharks and rays) > Torpediniformes (Electric rays) > Narkidae (Sleeper rays)
Etymology: Narke: Greek, narke = numbness (Ref. 45335).
More on authors: Temminck & Schlegel.

Environment: milieu / climate zone / depth range / distribution range Ecologia

marino associati a barriera corallina; distribuzione batimetrica 100 - ? m (Ref. 114953). Subtropical; 37°N - 20°N, 114°E - 139°E (Ref. 114953)

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Northwest Pacific: southern Japan to the South China Sea near Hong Kong, including Taiwan.

Length at first maturity / Size / Peso / Age

Maturity: L_m ?, range 35 - ? cm
Max length : 40.0 cm TL maschio/sesso non determinato; (Ref. 12951)

Occurs inshore and offshore (Ref. 9913, 11230). Found on sand, often near rocky reefs (Ref. 12951). Biology little known (Ref. 9913), but locally common in Taiwan and Japan (Ref. 114953). Produces 4-6 pups per litter. Maturity size of males known at 25 cm TL. Not utilized for food. Capable of producing a moderate shock to humans (Ref. 114953). Does not do well in aquariums (Ref. 12951).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

Ovoviviparous. Up to 5 in a litter (Ref. 12951).

Main reference Upload your references | Bibliografia | Coordinatore : Carvalho, Marcelo | Collaboratori

Compagno, L.J.V. and P.R. Last, 1999. Narkidae. Sleeper rays. p. 1443-1446. In K.E. Carpenter and V.H. Niem (eds.) FAO identification guide for fishery purposes. The living marine resources of the Western Central Pacific. FAO, Rome. (Ref. 9913)

IUCN Red List Status (Ref. 130435)

Vulnerabile, vedi Lista Rossa IUCN (VU) (A2cd); Date assessed: 17 May 2021

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Other (Ref. 10011)

Human uses

Pesca: scarso interesse commerciale

FAO - Publication: search | FishSource |

Informazioni ulteriori

Stati
Aree FAO
Ecosystems
Presenze
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Ecologia
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Prede
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Nomi Comuni
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Metabolismo
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Age/Size
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Length-weight
Length-length
Length-frequencies
Morfometria
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BRUVS

Bibliografia
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Fonti Internet

Estimates based on models

Preferred temperature (Ref. 123201): 18.5 - 28.9, mean 26.8 °C (based on 559 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.6252 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.5 ±0.37 se; based on food items.

Resilienza (Ref. 120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Assuming fecundity<100).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (30 of 100).

Price category (Ref. 80766): Unknown.

Narke japonica (Temminck & Schlegel, 1850)