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

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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.
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    Comparative analysis of the gut content of Scylla de Haan, 1833 (Crustacea: Decapoda: Brachyura: Portunidae) collected from the rivers of poblacion Sapian, Capiz
    Bautista, Florey Jane O. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2013-04)
    The natural diet for various sizes and both sexes of the mud crab Scylla sp. collected from the river located at Brgy. Poblacion Sapian Capiz, Philippines was determined. Gut content analysis was conducted for the mud crabs ranging from 30- 109.99 mm carapace width. Results showed that predominant food of mud crab Scylla sp. consists of crustaceans such as shrimps and crabs as well, fish, mollusk, sand shells, unidentified egg, and even plants. Most of the gut content however, consists of chyme due to heavy mastication and presence of the gastric mills that digest the food. There is no ontogenetic shift or difference in the diet as well as diet difference between male and female crabs. The results were discussed in relation with the species’ feeding patterns and the effect of the diet on the maturation of the crab: