इलाज़मौबरांकी (शारक और रेज़) (sharks and rays) >
Torpediniformes (Electric rays) >
Narkidae (Sleeper rays)
Etymology: Heteronarce: Greek, heteros = other + Greek, narke = numbness (Ref. 45335).
Eponymy: Dr Samuel Trevor Walton Garman (1843–1927) was an American naturalist, most noted as an ichthyologist and herpetologist. [...] (Ref. 128868), visit book page.
More on author: Regan.
Environment: milieu / climate zone / गहराई सीमा / distribution range
पारिस्थितिकी
समुद्री ड़िमरसल; गहराई सीमा 73 - 329 m (Ref. 6589). Subtropical; 20°S - 35°S, 27°E - 37°E (Ref. 114953)
Western Indian Ocean: southern Mozambique to Algoa Bay, South Africa (Ref. 5578).
आकार / वज़न / Age
परिपक्व अवधि: Lm ? range ? - ? cm
Max length : 25.0 cm TL पुल्लिंग / अलिंग; (Ref. 6589)
Short description
पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स
Small ray with an elongated, narrow disc and a small, narrow caudal fin (Ref. 5578). Plain brown above, white below (Ref. 5578).
Body shape (shape guide): other.
Found on the outer shelf and upper slope (Ref. 5578). Life history unknown. Males reaches maturity at ca. 17 cm TL (Ref. 114953).
Life cycle and mating behavior
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा
Compagno, L.J.V., 1986. Narkidae. p. 113-114. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 6589)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Human uses
मात्स्यिकी: कोई रुचि बग़ैर
साधन
Special reports
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इंटरनेट स्रोत
Estimates based on models
Preferred temperature (संदर्भ
123201): 15.2 - 22, mean 18.1 °C (based on 27 cells).
Phylogenetic diversity index (संदर्भ
82804): PD
50 = 0.5627 [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 (संदर्भ
69278): 3.2 ±0.3 se; based on size and trophs of closest relatives
लौटाव (संदर्भ
120179): निम्न, न्यूनतम जनसंख्या दुगनी होने का समय 4.5 - 14 वर्ष। (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Low vulnerability (15 of 100).
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