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इलाज़मौबरांकी (शारक और रेज़) (sharks and rays) > Torpediniformes (Electric rays) > Narkidae (Sleeper rays)
Etymology: Narke: Greek, narke = numbness (Ref. 45335).
More on authors: Bloch & Schneider.

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

समुद्री ड़िमरसल; गहराई सीमा 100 - ? m (Ref. 114953). Tropical; 42°N - 0°N, 55°E - 143°E (Ref. 114953)

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Indo-West Pacific; Oman (Arabian Sea) to north-east Asia (China and Japan).

आकार / वज़न / Age

Maturity: L_m ? range ? - ? cm
Max length : 18.0 cm TL पुल्लिंग / अलिंग; (Ref. 9913); common length : 20.0 cm TL पुल्लिंग / अलिंग; (Ref. 114953)

Found in continental waters, both inshore and offshore (Ref. 9913). Mainly feeds on crustaceans and polychaetes (Ref. 114953). Biology little known (Ref. 9913) but reported to produce 4-6 young each gestation (Ref. 114953). Adult males and females known at 15 cm TL; common size reported to reach 35 cm TL (Ref. 114953). The electric organs present on disc are used to stun the prey.

Life cycle and mating behavior Maturities | पुनरुत्पत्ति | Spawnings | Egg(s) | Fecundities | लार्वा

Main reference Upload your references | संदर्भ | संयोजक : Carvalho, Marcelo | सहयोगीयो

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)

वेदनीय, आई यु सी ऐन लाल सूची देखें। (VU) (A2d); Date assessed: 02 November 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Other (Ref. 10011)

Human uses

मात्स्यिकी: लघु वाणिज्य

FAO - Publication: search | FishSource |

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इंटरनेट स्रोत

Estimates based on models

Preferred temperature (Ref. 123201): 19 - 28.2, mean 26.4 °C (based on 992 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): 3.2 ±0.3 se; based on size and trophs of closest relatives

लौटाव (Ref. 120179): निम्न, न्यूनतम जनसंख्या दुगनी होने का समय 4.5 - 14 वर्ष। (Assuming fecundity<100).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Price category (Ref. 80766): Unknown.

Narke dipterygia (Bloch & Schneider, 1801)