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UPV Theses and Dissertations

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Degree: search.filters.degree.Bachelor of Science in BiologyKeyword: search.filters.keyword.Food

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    Bacteriological survey and detection of Escherichia coli, Salmonella spp., Streptococcus spp., and Vibrio spp. in bottom sediments from two sites in Iloilo River
    Barrera, Christopher (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2010-04)
    Bacterial contamination in the Iloilo river occurs because of various human activities. The assessment of the river was done using microbiological parameters (HPC, TC, FC, and FS) for 7 months in Sooc Bridge and Carpenter’s Bridge using bottom sediments for samples. Sediment was used because bacteria accumulate over time in the sediment due to high amounts of organic and inorganic matter in the substrate and this leads to better survivability of bacteria. The values obtained from microbiological parameters investigated are generally higher in Sooc Bridge. HPC results show that the higher mean value was in Sooc Bridge(7.43 x 108 CFU/lOOg). The levels of TC on both sampling sites ranged from 9.5 x 102to 2.40 x 104 CFU/100g. For TC, Sooc has the higher mean (1.76 x 104 CFU/lOOg) for 7 months. FC values ranged from 3.0 x 101 to 2.4 x 104 CFU/lOOg. Sooc bridge has the higher mean(1.17 x 104 CFU/lOOg) between the 2 sites. Lastly, the FS value range from 2.9 x 103 to 2.4 x 104 CFU/lOOg. Also, Sooc Bridge has the higher mean value (1.58 x 104 CFU/lOOg). There are no significant differences on the microbiological parameters used in each site. The FC/FS ratio revealed that mixed fecal materials contaminate the river. Among the four pathogenic bacteria detected, Salmonella spp. was the most abundant for 7 months (63-65%) and E. coli was the least abundant(>l%). Based on the criteria on sediment quality evaluation, there is little to moderate loading of organic and inorganic matter.
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    Comparison between commercial pellets and golden apple snail pellets as food for Tilapia nilotica fingerlings
    Arboleda, Daphne A. (Dision of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1997-04)
    The viability of Golden apple snail as food for Tilapia nilotica was determined by comparing it with commercial pellets. The experiment was conducted on February 3, 1997. The two treatments had three replicates each with a stocking density of 15 fingerlings each. Comparison of growth curves showed that fingerlings fed with commercial pellets grew significantly (P< 0.01) faster than those fed with golden apple snail pellets. The computed FCR was also greater for commercial pellets. The results suggest that golden apple snail alone does not promote efficient growth in Tilapia nilotica fingerlings. Thus it is recommended that golden apple snail be combined with other food ingredients to enable its efficient utilization as a protein source.