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Cephalopods in the Diet of Swordfish (Xiphias gladius) Caught off the West Coast of Baja California, Mexico
|Title:||Cephalopods in the Diet of Swordfish (Xiphias gladius) Caught off the West Coast of Baja California, Mexico|
|LC Subject Headings:||Cephalopoda--Predators of--Mexico--Baja California (Peninsula).|
Swordfish -- Mexico -- Baja California (Peninsula).
Natural history--Pacific Area--Periodicals.
|Issue Date:||Jan 2005|
|Publisher:||University of Hawaii Press|
|Citation:||Markaida U, Hochberg FG. Cephalopods in the Diet of Swordfish (Xiphias gladius) Caught off the West Coast of Baja California, Mexico. Pac Sci 59(1): 25-41.|
|Series/Report no.:||vol. 59, no. 1|
|Abstract:||The lower beaks of 1,318 cephalopods from the stomach contents of 175 swordfish, Xiphias gladius, caught off the west coast of Baja California, Mexico, between 1988 and 1996 were analyzed. In total, 20 species of teuthoids, 4 octopods, and one vampyromorph were identified. Weights and lengths of cephalopods were estimated from the lower rostral lengths. Ommastrephid squids, primarily jumbo squid Dosidicus gigas of different maturing sizes, composed 60% by number and 82% by estimated weight. Three species of gonatids were identified and represented 22% by number. An unidentified species of Argonauta was the most abundant octopod, with 5.8% of the beak total. Ancistrocheirus lesueurii is recorded for the first time in the California Current. Distribution of cephalopods in the California Current and their size in the diet of other marine predators are discussed. The diet of swordfish was dominated by medium to large muscular squid species that probably are eaten in surface waters at night.|
|Appears in Collections:||Pacific Science Volume 59, Number 1, 2005|
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