UPV Digital RepositoryUPV-DRUniversity of the Philippines Visayas
 

Undergraduate Special Problem

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

Browse

Filters

2010 - 20132

Settings

Adviser: search.filters.advisor.Libutaque, JesusaSDG: search.filters.sdg.SDG 13 - Climate action

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    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:
  • Thumbnail Image
    Item
    Assessment of heavy metal traces (Copper and lead) in the soft tissue of Oysters Crassostrea virginica
    Balboa, Dexter G. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2010-04-05)
    The bivalve mollusk Crassostrea virginica is abundant in Brgy. Calaparan, Arevalo and Brgy. Bacong, Dumangas; and are widely consumed by the residence as food. Bioaccumulation of Copper and Lead in the soft tissues of C. virginica from Brgy. Calaparan, Arevalo and Brgy. Bacong, Dumangas were measured and checked if they are still within the permissible levels of Copper and Lead in food based on Median International Standards for metals compiled by the Food and Agricultural Organization of the United Nations. Metal concentrations (μg/g) were determined using Flame Atomic Absorption Spectrophotometer. Mean concentrations of the heavy metals in C. virginica from Calaparan, Arevalo- Cu 27.829, Pb 1.2133; Bacong, Dumangas- Cu 57.834, Pb 0.1338. These levels of Copper and Lead in oyster tissue from both sites are within the the range of Median International Standards for metals and are safe for human consumption. Statistical analysis through one- way ANOVA (F > Fcrit, showed significant difference between sites (Fcrit = 18.51282) for Copper (F value, 215.06569) but not for Lead (F value, 2.25151). The study also provided further solid evidence that bivalve like Crassostrea virginica can recover and concentrate environmentally derived and anthropogenic traces of heavy metals.