Elasmobranchii (Haie und Rochen) (sharks and rays) >
Torpediniformes (Electric rays) >
Torpedinidae (Electric rays)
Etymology: Torpedo: Latin, torpere = be sluggish (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ökologie
seewasser; brackwasser riff-verbunden; tiefenbereich 1 - 200 m (Ref. 9710). Tropical; 30°N - 31°S, 30°E - 72°E (Ref. 114953)
Western Indian Ocean: Persian Gulf (Ref. 80050), Red Sea eastward to India (Ref. 2712) and southward to Natal, South Africa (Ref. 5578).
Size / Gewicht / Alter
Maturity: Lm ? range ? - ? cm
Max length : 130 cm TL Männchen/unbestimmt; (Ref. 2712)
Kurzbeschreibung
Morphologie | Morphometrie
Large ray with a small caudal fin and with papillae around the spiracles (Ref. 5578). Bright color pattern of circles and irregular marks, cream or golden on dark red or brown to blackish background dorsally (Ref. 5578).
Found inshore in sandy bottoms, and well offshore from the surf zone down to 200 m (Ref. 5578). Also on or near coral reefs (Ref. 12951, Ref. 114953). Common in shallow sandy areas (Ref. 2712). Feeds on bony fishes (Ref. 12951) and benthic invertebrates (Ref. 114953). Ovoviviparous (Ref. 50449). Males mature by 30 cm TL (Ref. 114953). Occurs singly but may form groups during the breeding season (Ref. 12951). Occasionally hooked by anglers, more often seen by divers; can deliver a strong shock (Ref. 2712). Flesh is edible (Ref. 12484). Can survive for hours after being stranded on the beach (Ref. 41394).
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). With 9-22 in a litter (Ref. 12951). Form aggregations during the reproductive season (Ref. 41394).
Compagno, L.J.V., 1986. Torpedinidae. p. 112-113. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 2712)
IUCN Rote Liste Status (Ref. 130435)
Nutzung durch Menschen
Sportfisch: ja
Mehr Information
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Estimates based on models
Preferred temperature (Ref.
123201): 21.8 - 28.3, mean 25.5 °C (based on 370 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01585 (0.00973 - 0.02580), b=3.00 (2.86 - 3.14), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 4.5 ±0.80 se; based on food items.
Widerstandsfähigkeit (Ref.
120179): sehr niedrig, Verdopplung der Population dauert mehr als 14 Jahre. (Fec=9-22).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (78 of 100).
