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Undergraduate Special Problem

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

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Keyword: search.filters.keyword.SpeciesSDG: search.filters.sdg.SDG 14 - Life below water

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    Relation of size and sex to the natural diet of the red crab Charybdis feriatus Linnaeus (Brachyura: Portunidae) from Pilar-Capiz Bays, Northern Panay
    Alabia, Irene Dolorfino (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2003-03)
    A total of 395 (males= 282; females=113) specimens of the red crab Charybdis feriatus were collected from Pilar-Capiz Bays from January-December 2002 and were used for the present study. Relative fullness index were computed for both sexes of different size classes. Results showed that stomachs of females were slightly fuller than that of males. Similar observation was made between juvenile and adult specimens. A total of 75 (males= 57; females= 18) gut contents were analyzed in detail. Major food items in the diet of the crabs include unidentified matter, unidentified eggs, fish, crab, and shrimp remains. Frequency of occurrence and combined visual estimation of unidentified organic matter were used for the examination. No dietary differences due to ontogenetic change were observed in the species while diet of male crabs were found to be more varied than those of females. However, frequency of occurrence of major food items in the stomachs of both sexes was comparable.
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    Species composition and distribution of fish larvae in Lianga Bay, Surigao del Sur
    Acabado, Cristy S. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2007-03)
    The species composition and distribution of ichthyoplankton in Lianga Bay, Surigao del Sur was investigated in June 2004. A total of 37 families were recorded from horizontal tows collected in 32 sampling stations. The most dominant larvae were Gobiidae and Pomacentridae, which comprised 20.4% and 16.0% of all larvae sampled, respectively. Overall larval density was 4.2 ind. 100 m-3 (n=32; sd=5.0), with highest concentrations in the inner portion of the bay particularly in the west and southwest portions. On the other hand, egg density (mean=0.9 eggs m-3; n=32; sd=0.9) showed highest concentration near the coastline but further from the central basal portion of the bay. Patches of high egg concentrations suggest that Lianga Bay may serve as spawning ground for some species.