分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (sharks and rays) > Torpediniformes (Electric rays) 電鰩目 (Electric rays) > Torpedinidae (Electric rays) 電 (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).

Environment: milieu / climate zone / depth range / distribution range 生態學

海洋底中水層性; 深度上下限 110 - 457 m (Ref. 100734). ; 22°S - 37°S, 12°E - 28°E (Ref. 114953)

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

Length at first maturity / 大小 / 重量 / 年齡

Maturity: L_m ?, range 101 - ? cm
Max length : 68.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 100734); 113.3 cm TL (female)

簡短描述型態特徵 | 形態測量圖

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).

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).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚

主要參考資料 Upload your references | 參考文獻 | 合作者 : Carvalho, Marcelo | 合作者

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)

IUCN 瀕危狀態 (Ref. 130435)

無危 (LC) ; Date assessed: 25 April 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01479 (0.00659 - 0.03318), b=2.97 (2.78 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

營養階層 (Ref. 69278): 4.4 ±0.6 se; based on size and trophs of closest relatives

回復力 (Ref. 120179): 非常低的, 最小族群倍增時間超過14 年 (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): High to very high vulnerability (68 of 100).

Tetronarce cowleyi Ebert, Haas & de Carvalho, 2015

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Environment: milieu / climate zone / depth range / distribution range 生態學

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Length at first maturity / 大小 / 重量 / 年齡

簡短描述型態特徵 | 形態測量圖

生物學特性字彙 (例如 epibenthic)

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚

主要參考資料 Upload your references | 參考文獻 | 合作者 : Carvalho, Marcelo | 合作者

IUCN 瀕危狀態 (Ref. 130435)

CITES

CMS (Ref. 116361)

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Tetronarce cowleyi Ebert, Haas & de Carvalho, 2015

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Environment: milieu / climate zone / depth range / distribution range 生態學

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Length at first maturity / 大小 / 重量 / 年齡

簡短描述 型態特徵 | 形態測量圖

生物學特性 字彙 (例如 epibenthic)

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚

主要參考資料 Upload your references | 參考文獻 | 合作者 : Carvalho, Marcelo | 合作者

IUCN 瀕危狀態 (Ref. 130435)

CITES

CMS (Ref. 116361)

對人類具威脅

人類使用

更多資訊

工具

特別的報告

下載 XML

網路資源

Estimates based on models

分布國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

簡短描述型態特徵 | 形態測量圖

生物學特性字彙 (例如 epibenthic)