Elasmobranchii (hajar och rockor) (sharks and rays) >
Torpediniformes (Electric rays) >
Narkidae (Sleeper rays)
Etymology: Heteronarce: Greek, heteros = other + Greek, narke = numbness (Ref. 45335).
Eponymy: Dr Adam Ben-Tuvia (1919–1999) was born in Krakow, Poland, but died in Jerusalem, Israel. [...] (Ref. 128868), visit book page.
More on authors: Baranes & Randall.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina bottenlevande; djupintervall ? - 160 m (Ref. 26282). Tropical; 28°N - 13°N, 34°E - 54°E (Ref. 114953)
Western Indian Ocean: Red Sea (Gulf of Aqaba) and Gulf of Aden.
Storlek / Vikt / Ålder
Könsmognad: Lm ? range ? - ? cm
Max length : 17.6 cm NG hane/ej könsbestämd; (Ref. 28618)
A benthic species found on outer continental shelf. Presumably feeds on soft bottom invertebrates such as polychaetes and crustaceans. Males reaches maturity at ca. 15 cm TL. Material rare; specimens from Gulf of Aden and Red Sea slightly differ (Ref. 114953).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Compagno, L.J.V., 1999. Checklist of living elasmobranchs. p. 471-498. In W.C. Hamlett (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes. Johns Hopkins University Press, Maryland. (Ref. 35766)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Verktyg
Särskilda rapporter
Ladda ner XML
Internet-källor
Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref.
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).
Trofisk nivå (Ref.
69278): 3.2 ±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 (15 of 100).
🛈
