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Undergraduate Special Problem

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14583/30

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    Composition and abundance of the stomach contents of Caranx melampygus in Nabinbinan Bay, Nueva Valencia, Guimaras
    Caigoy, Mary Johnalynn S. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-06)
    Caranx melampygus, a piscivore common in the Indo-Pacific, is an important diurnal predator in coral reefs, but little local information is available on the diet of this fish. This study was done to determine the diet composition and abundance of C. melampygus by examining the stomach contents of specimens collected every 2-4 weeks from catches of fish corals in Southern Guimaras from May 2012 to November 2013. Chyme, fishes, and shrimps were found in the guts of C. melampygus. The Sergestid shrimp Acetes dominated the overall prey composition, followed by penaeid shrimps, and fishes (atherinid, clupeid, engraulid). The mean food count and prey composition varied among small (6-6.9, 7-7.9, 8-8.9), medium (9-9.9, 10-10.9, 1lli.9), and large (12-12.9, 13-13.9, 14-14.9, 15-15.9) fish, suggesting that the food preference of C. melampygus changes as the fish grows.
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    A comparison of the gut contents of two Cardinal Fish, Fowleria vaiulae (Jordan & Seale 1906) and Fowleria variegata (Valenciennes 1832) in seagrass beds of Palompon, Leyte
    Biantan, Lindsay S. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-06)
    Seagrass ecosystems support much of the Philippines’ coastal marine resources with the presence of a rich diversity of species, including the economically important ones. Understanding the diet composition of fishes through gut content analysis is essential for selecting species for aquaculture. Specimens of Fowleria vaiulae and Fowleria variegata were obtained through a trawl survey in the seagrass beds of Palompon, Leyte from November 2011 to February 2012. A total of 291 guts were analysed in this study. Results showed diet composition of both species is mostly made up of benthic invertebrates. A high percentage of chyme was observed in both species (46-65%), suggesting the consumption of easily digested materials. Also for both Fowleria species, it was observed that smaller size classes consume a higher number of small preys while larger size classes feed on larger preys. Small invertebrates such as tanaids and amphipods were more abundant in the guts of F. vaiulae and large preys of shrimps and crabs dominate the diet of F. variegata. This difference may be due to food partitioning in co-occurring species to avoid competition.