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Torpediniformes (Electric rays) >
Torpedinidae (Electric rays)
Etymology: californica: Named after the state of California (Ref. 6885).
More on author: Ayres.
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
laut dasar (demersal); kisaran kedalaman 0 - 906 m (Ref. 96339), usually 3 - 200 m (Ref. 55307). Temperate; 48°N - 23°N, 126°W - 110°W (Ref. 55307)
Eastern Pacific: Dixon Entrance, British Columbia, Canada to Sebastian Vizcaino Bay, Baja California, Mexico. Electric rays off Peru, Chile, and Japan may belong to this species (Ref. 2850).
Panjang pada saat jatuh tempo pertama / Ukuran / Berat / umur
Kematangan: Lm ?, range 73 - ? cm
Max length : 140 cm TL jantan/; (Ref. 12951); 137.0 cm TL (female); common length : 91.0 cm TL jantan/; (Ref. 43939); common length :137 cm TL (female); Berat maksimum terpublikasi: 0.00 g; Umur maksimum dilaporkan: 16 Tahun (Ref. 48844)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
Gray with scattered black spots dorsally, no ocelli. 1st dorsal fin much larger than 2nd. Spiracle margin smooth and without papillae.
Body shape (shape guide): other.
Found on the outer continental shelf, around rocks, in kelp beds, over fine sand bottoms or buried in sand. Solitary, nomadic, and can remain suspended in the water with minimal swimming (Ref. 12951). Feeds on bony fishes, mainly herrings and halibuts. Ovoviviparous (Ref. 50449). Produces litters of up to 17 pups. Males reaches maturity at ca. 65 cm TL, females at ca. 73 cm TL (Ref. 114953). Attacks their prey from the substratum by day and actively forage at night with the aid of its electric organ discharge or EOD (Ref. 10011). The EOD of a large individual was measured at 50 V; with a low internal organ resistance the power output exceeded 1 kW (Ref. 10480). Aggressive when provoked but no human has yet been injured by the electric shock (Ref. 2850). Does not do well in aquariums (Ref. 12951).
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).
Reproductive cycle appears to be annual in males and biannual in females (Ref. 48844). No defined birthing season (Ref. 48844).
Allen, M.J. and G.B. Smith, 1988. Atlas and zoogeography of common fishes in the Bering Sea and northeastern Pacific. NOAA Tech. Rep. NMFS 66, 151 p. (Ref. 6793)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan 82804) |
PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01479 (0.00668 - 0.03273), b=2.97 (2.78 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Tingkat Trofik (Acuan 69278) |
4.5 ±0.80 se; based on food items. |
Daya lenting (Acuan 120179) |
Rendah, Waktu penggandaan populasi minimum 4.5 - 14 tahun (Fec = 17; tm=9; tmax=16). |
Kerentanan Penangkapan Ikan (Ref. 59153) |
Very high vulnerability (79 of 100). 🛈 |