Tetronarce cowleyi, Cowley's torpedo ray

Tetronarce cowleyi Ebert, Haas & de Carvalho, 2015

Cowley's torpedo ray
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Tetronarce cowleyi   AquaMaps   Data sources: GBIF OBIS
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Image of Tetronarce cowleyi (Cowley\
No image available for this species;
drawing shows typical species in Torpedinidae.

Clasificación / Nombres Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranquios (tiburones y rayas) (sharks and rays) > Torpediniformes (Electric rays) > Torpedinidae (Electric rays)
Etymology: cowleyi: The species is named after Paul Cowley, South African Institute for Aquatic Biodiversity, in recognition of his contributions to the study of fishes in southern Africa (Ref. 100734).
Eponymy: Dr Paul D Cowley is principle scientist at the South African Institute for Aquatic Biodiversity (since 2000) and honorary professor and Research Associate at the Department of Ichthyology and Fisheries Science at Rhodes University. [...] (Ref. 128868), visit book page.

Entorno: milieu / zona climática / rango de profundidad / gama de distribución Ecología

marino bentopelágico; rango de profundidad 110 - 457 m (Ref. 100734). Temperate; 22°S - 37°S, 12°E - 28°E (Ref. 114953)

Distribución Territorios | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Mapa de puntos | Introducciones | Faunafri

Southeast Atlantic: around southern Africa, from Walvis Bay, Namibia to Algoa Bay, Eastern Cape, South Africa (Ref. 100734).

Longitud en la primera madurez / Tamaño / Peso / Edad

Madurez: Lm ?, range 101 - ? cm
Max length : 68.0 cm TL macho / no sexado; (Ref. 100734); 113.3 cm TL (female)

Descripción breve Claves de identificación | Morfología | Morfometría

Diagnosis: This medium-sized torpedo ray species has a uniform shiny black to dark gray live dorsal color, and is distinguished from its most similar congeners Tetronarce nobiliana and T. puelcha by the following combination of characters: shorter spiracular length, 1.5-1.6% of total length vs. 2.6-2.8% in T. nobiliana and 2.4-3.1% in T. puelcha; a proportionally greater head length as measured between snout margin and fifth gill openings, 30.5-31.2% of total length vs. 24.7-25.8% in T. nobiliana and 26.8% in adult male T. puelcha; and a proportionally greater preoral snout length, 8.9-9.3% of total length vs. 7.4-7.6% in T. nobiliana and 6.5-8.4% in T. puelcha (Ref. 100734). It is further distinguished from T. nobiliana by its more circular anterior disc shape vs. relatively straight; fewer tooth rows, 32/28 vs. 38/38 in T. nobiliana from the North Sea and up to 53/52 in T. nobiliana from the Mediterranean; greater mouth width, 1.5-1.7 times as great as interorbital width vs. 0.5-0.6 times interorbital width; smaller distance between second dorsal and caudal fins, 3.5-4.9% vs. 6.6-6.8%; and greater clasper length in mature individuals, extending nearly to lower caudal fin origin vs. clasper extends only two-thirds the distance between second dorsal and caudal fins (Ref. 100734).
Cross section: flattened.

Biología     Glosario (por ej. epibenthic)

This species is mostly found along the outer continental shelf and upper slope near the bottom, but also well off it and at bottom depths of 110-457 m (Ref. 100734). Females mature by at least 100.5 cm total length and males at about 58.2 cm total length (Ref. 100734); born before 19 cm TL (Ref. 114953). Neonates reported to have been collected during pelagic plankton tows on the edge of the outer continental shelf southwest of Cape Town (Ref. 100734). The limited capture of this electric ray in bottom trawls is suspected to be not indicative of its abundance in the area, but rather by its ability to move well off the bottom while foraging for fish and other large prey; diet consists mainly of large bottom and pelagic bony fishes and small sharks (Ref. 100734).

Ciclo vital y comportamiento de apareamiento Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva

Referencia principal Suba sus referencias | Referencias | Coordinador : Carvalho, Marcelo | Colaboradores

Ebert, D.A., D.L. Haas and M.R. De Carvalho, 2015. Tetronarce cowleyi, sp. nov., a new species of electric ray from southern Africa (Chondrichthyes: Torpediniformes: Torpedinidae). Zootaxa 3936(2):237-250. (Ref. 100734)

Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))

  Least Concern (LC) ; Date assessed: 25 April 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Amenaza para el ser humano

  Harmless





Usos humanos

FAO - Publication: search | FishSource |

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Fuentes de Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Género, Especie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Árbol de la vida | Wikipedia: Go, búsqueda | World Records Freshwater Fishing | Zoobank | Expediente Zoológico

Estimaciones basadas en modelos

Índice de diversidad filogenética (Referencia 82804):  PD50 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00678 - 0.03229), b=2.97 (2.78 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nivel trófico (Referencia 69278):  4.4   ±0.6 se; based on size and trophs of closest relatives
Resiliencia (Referencia 120179):  Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (Preliminary K or Fecundity.).
Vulnerabilidad pesquera (Ref. 59153):  High to very high vulnerability (68 of 100). 🛈