||Etmopterus unicolor (Engelhardt, 1912)
||Brown Lanternshark, Brown Lanternshark
Etmopterus compagnoi Fricke & Koch, 1990
Spinax unicolor Engelhardt, 1912
||Straube, N., Duhamel, G., GaSco, N., Kriwet, J. and Schliewen, U.K. 2011. Description of a new deep-sea lantern shark Etmopterus viator sp. nov.(Squaliformes: Etmopteridae) from the Southern Hemisphere. The Kerguelen Plateau, Marine Ecosystem and Fisheries. Société Française d Ichtyologie, Paris: 135-148.
||The taxonomic history of Etmopterus unicolor is complex. This species has been confused with E. spinax, which does not occur in South African waters and E. gracilispinis which does occur in South African waters (Compagno in prep). Etmopterus compagnoi is tentatively ranked as a junior synonym of E. unicolor based on Fricke and Koch’s (1990) description (Compagno in prep). E. tasmaniensis Myagkov & Pavlov, 1986 is a questionably valid species that may be based on this species or E. baxteri. Formerly known as E. sp. B off Australia (Compagno et al. 2005).
|Red List Category & Criteria:
||McCormack, C. & Valenti, S.V.
||Ebert, D.A., Stevens, J. & Francis, M. (Shark Red List Authority)
The Bristled Lanternshark (Etmopterus unicolor) is a deepwater lantern shark found on continental and insular slopes, often at the bottom and sometimes well off it, at depths of 402–1,380 m. Known from the western and southern coasts of South Africa, southern Australia, Namibia and Japan. This species probably has limiting life-history characteristics, like other deepwater squalid sharks (preliminary age data show that similar species mature at 11.5–30 years), making it vulnerable to population depletion. It is taken as bycatch of various fisheries throughout its range. It was taken in large quantities off Australia and discarded, but the survival of discards was probably very low. At present there is insufficient information to assess this species beyond Data Deficient; however efforts should be made to quantify bycatch levels to enable reassessment in the near future.
|Range Description:||Southeast Atlantic and western Indian Ocean: Namibia, South Africa (Northern Cape near Hondeklip Bay, Western Cape from Saldanha Bay to Cape Agulhas, Eastern Cape from Plettenberg Bay to Algoa Bay, and northern kwaZulu-Natal) (Compagno in prep).|
Eastern Indian Ocean and southwest Pacific: southern Australia (from Perth to in Western Australia to Victoria and Tasmania), seamounts south of Australia including the Cascade Plateau and South Tasman Rise and from New South Wales, north to Taree (Compagno in prep). Yano (1997) recorded E. unicolor from the ridges to the north (Three Kings Ridge and Lord Howe Rise) of New Zealand waters, but further taxonomic study is required to determine whether Northern and Southern Hemisphere populations are con-specific (M. Francis pers. comm. 2007).
Northwest Pacific: Japan (southeastern Honshu) (Compagno in prep).
Australia (New South Wales, South Australia, Tasmania, Western Australia); Japan (Honshu); Namibia; South Africa (Eastern Cape Province, KwaZulu-Natal, Northern Cape Province, Western Cape)
|FAO Marine Fishing Areas:|
Atlantic – southeast; Indian Ocean – western; Indian Ocean – eastern; Pacific – northwest; Pacific – southwest
|♦ Lower depth limit (metres):||1380|
|♦ Upper depth limit (metres):||402|
|Range Map:||Click here to open the map viewer and explore range.|