Skip to main content
×
Home
    • Aa
    • Aa

Food and feeding habits of the blue shark Prionace glauca caught off Ensenada, Baja California, Mexico, with a review on its feeding

  • Unai Markaida (a1) and Oscar Sosa-Nishizaki (a1)
Abstract

Stomach contents of 893 blue shark (Prionace glauca) caught off Ensenada, Todos Santos Bay, Baja California, from 1995 to 1997 were analysed. 614 had identifiable food remains. A large variety of pelagic cephalopods occurred in 55.5% of all stomachs and accounted for 46.2% of all prey and 84% by estimated weight of stomach contents. The most abundant (17%) and frequent (32%) was Histioteuthis heteropsis and the most important by estimated weight (22%) was ‘Gonatus californiensis’. Argonauta spp. and Vampyroteuthis infernalis were also abundant prey. A pair of beaks of giant squid Architeuthis sp. constitutes the first record for Mexican waters. Feeding habits and the probability of scavenging on mesopelagic cephalopods is discussed. The single most abundant prey was the pelagic, red crab Pleuroncodes planipes (41.7%). Other prey included teleost fish, amniotes and floating items. Diet varied greatly between months with no clear seasonal pattern. Tiny diet differences due to shark size or sex were inconclusive. A thorough review of studies on blue sharks stomach contents analysis is given. Blue shark feed on a large variety of passive pelagic prey, mainly mesopelagic cephalopods, that could be preyed upon as well as scavenged. Depletion of this predator due to overfishing may be leading to unknown cascading top-down effects in the mesopelagic realm.

Copyright
Corresponding author
Correspondence should be addressed to: U. Markaida, Laboratorio de Pesquerías Artesanales, El Colegio de la Frontera Sur (ECOSUR), Unidad Campeche, Calle 10 # 264, Col. Centro, 24000 Campeche, Mexico email: umarkaida@ecosur.mx
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

J.K. Baum and B. Worm (2009) Cascading top-down effects of changing oceanic predator abundances. Journal of Animal Ecology 78, 699714.

F.G. Carey and J.V. Scharold (1990) Movements of blue shark (Prionace glauca) in depth and course. Marine Biology 106, 329–242.

A.C. Henderson , K. Flannery and J. Dunne (2001) Observations on the biology and ecology of the blue shark in the North-east Atlantic. Journal of Fish Biology 58, 13471358.

R.J. LeBrasseur (1964) Stomach contents of blue shark (Prionace glauca L.) taken in the Gulf of Alaska. Journal of the Fisheries Research Board of Canada 21, 861862.

U. Markaida and F.G. Hochberg (2005) Cephalopods in the diet of swordfish (Xiphias gladius Linnaeus) caught off the west coast of Baja California, Mexico. Pacific Science 59, 2541.

M.E. McCord and S.E. Campana (2003) A quantitative assessment of the diet of the blue shark (Prionace glauca) off Nova Scotia, Canada. Journal of Northwest Atlantic Fishery Science 32, 5763.

H. Nakano and J.D. Stevens (2008) The biology and ecology of the blue shark, Prionace glauca. In M.D. Camhi , E.K. Pikitch and E.A. Babcock (eds) Sharks of the open ocean: biology, fisheries and conservation. Oxford: Blackwell Publishing Ltd, pp. 140151.

M.C. Pardo-Gandarillas , F. Duarte , J. Chong and C.M. Ibáñez (2007) Dieta de tiburones juveniles Prionace glauca (Linnaeus, 1758) (Carcharhiniformes: Carcharhinidae) en la zona litoral centro-sur de Chile. Revista de Biología Marina y Oceanografía 42, 365369. [In Spanish with English abstract.]

C.J. Robinson , V. Anislado and P. Chaparro (2004) The pelagic red crab (Pleuroncodes planipes) related to active upwelling sites in the California Current off the west coast of Baja California. Deep-Sea Research II 51, 753766.

F.B. Schwing , T. Murphree , L. deWitt and P.M. Green (2002) The evolution of oceanic and atmospheric anomalies in the northeast Pacific during the El Niño events of 1995–2001. Progress in Oceanography 54, 459491.

O. Sosa-Nishizaki , J. Márquez-Farías and C.J. Villavicencio-Garayzar (2008) Case study: pelagic shark fisheries along the west coast of Mexico. In M.D. Camhi , E.K. Pikitch and E.A. Babcock (eds) Sharks of the open ocean: biology, fisheries and conservation. Oxford: Blackwell Publishing Ltd, pp. 275282.

J.D. Stevens (1984) Biological observations on sharks caught by sport fisherman off New South Wales. Australian Journal of Marine and Freshwater Research 35, 573590.

J.R. Voight , H.O. Pörtner and R.K. O'Dor (1994) A review of ammonia-mediated buoyancy in squids (Cephalopoda: Teuthoidea). Marine and Freshwater Behaviour and Physiology 25, 193203.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: