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Diet Composition of Bullet Mackerel, Auxis rochei (Risso, 1810) in the Coastal Waters of Iloilo, Philippines  

Baeck, Gun Wook (Department of Marine Biology & Aquaculture, Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
Quinitio, Gerald F. (Institute of Marine Fisheries and Oceanology College of Fisheries and Ocean Sciences University of the Philippines Visayas)
Vergara, Christopher J. (Institute of Marine Fisheries and Oceanology College of Fisheries and Ocean Sciences University of the Philippines Visayas)
Kim, Hyeon Ji (Department of Marine Biology & Aquaculture, Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
Jeong, Jae Mook (Department of Marine Biology & Aquaculture, Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
Publication Information
Korean Journal of Ichthyology / v.26, no.4, 2014 , pp. 349-354 More about this Journal
Abstract
The diet composition of bullet mackerel, Auxis rochei was studied using 200 specimens collected from December 2013 to May 2014 in the coastal waters of Iloilo, Philippines. The size of A. rochei ranged from 11.1 to 31.2 cm in fork length (FL). A. rochei was epipelagic feeder that consumed mainly fishes. In addition, A. rochei consumed shrimps, copepods, crab larvae, amphipods and cephalopods. The diet also included small quantities of stomatopods, bivalves, and ostracods. Also, analysis of the prey-specific abundance against the frequency of occurrence shows that A. rochei have a narrow food niche, and are specialized feeder with fish as their dominant prey. Although fishes were the primary in food consumed by all size class. The fishes gradually increased with body size.
Keywords
Diet composition; Auxis rochei; bullet mackerel; Iloilo; Philippines;
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