||Apristurus brunneus (Gilbert, 1892)
Catulus brunneus Gilbert, 1892
||Eschmeyer, W.N. and Fricke, R. (eds). 2015. Catalog of Fishes: genera, species, references. Updated 1 October 2015. Available at: http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatmain.asp. (Accessed: 1 October 2015).
||The genus Apristurus contains at least 32 described species and a relatively large number of potentially undescribed ones. Morphological conservatism and, until recently, a lack of objectively defined characters makes this one of the most taxonomically confused shark genera (Compagno 1984, Nakaya and Sato 1999).
Nakaya and Sato (1999) defined three species groups within Apristurus: the longicephalus-group (two species), brunneus-group (20 species) and spongiceps-group (10 species). The brunneus-group is characterized by: a short, wide snout (prenarial length <6% total length (TL), 0.36 to 0.94 times in interorbital); 13 to 22 valves in the spiral intestine; upper labial furrows obviously longer than the lower furrows; a discontinuous supraorbital sensory canal.
Compagno (1984) considered it likely that the specimens and records of A. brunneus from the western North Pacific represent an assemblage of two or more brunneus-like species.
|Red List Category & Criteria:
||Huveneers, C., Duffy, C.A.J., Cordova, J. & Ebert, D.A.
||Jew, M.L. & Nehmens, M.C.
||Lawson, J., Walls, R.H.L. & Dulvy, N.K.
Brown Catshark (Apristurus brunneus) is a little-known deepwater catshark from the outer continental shelf and upper slope of the Eastern Pacific, known from depths of 33-1,298 meters. This species is oviparous with an egg incubation period of possibly two years or more. Size at 50% maturity is reported to be 514 mm total length for males, and 501 mm total length for females, however maturity varied by latitude in females with those at lower latitudes reaching maturity more quickly than those at higher latitudes. Although this catshark is reported to be a relatively common bycatch in deepwater trawl fisheries, insufficient catch and biological information are available to assess its extinction risk beyond Data Deficient. Species-specific monitoring of catches should be undertaken.
|Previously published Red List assessments:|
- 2004 – Data Deficient (DD)
|Range Description:||Brown Catshark is found in the eastern Pacific Ocean from southern Alaska (Wilson and Hughes 1978) to southern California (Roedel and Ripley 1950) and the Gulf of California (Taylor 1972). It is also found in Central and South America in Panama, Ecuador, Peru, and Chile (Andrade and Pequeno 2008, Ebert et al. 2013, Bustamante et al. 2014).|
Canada (British Columbia); Chile; Costa Rica; Ecuador; Guatemala; Honduras; Mexico (Baja California, Baja California Sur); Nicaragua; Panama; Peru; United States (Alaska, California, Oregon, Washington)
|FAO Marine Fishing Areas:|
Present - origin uncertain:
Pacific – northeast; Pacific – southeast; Pacific – eastern central
|♦ Lower depth limit (metres):||1298|
|♦ Upper depth limit (metres):||33|
|Range Map:||Click here to open the map viewer and explore range.|