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UPV Theses and Dissertations

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Start date: 2020SDG: search.filters.sdg.SDG 14 - Life below water

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    Factors affecting women's participation in small-scale fisheries in Miagao, Iloilo
    Abordaje, Ira; Nocon, Kimberly (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2023-05)
    Small-scale fisheries is considered as a source of income that contributes to food security and livelihood sustainability, especially in coastal communities. However, women who fish are marginalized due to traditional gender roles. Their contributions to fisheries are frequently overlooked in economic analysis, fisheries management, and policy decisions. Women also uniquely experience multiple burdens due to gender roles and social expectations. This study analyzed the factors affecting women's decision to participate in small-scale fishing in Miagao, Iloilo. The study used surveys and the data were analyzed through binary logistic regression. Results showed that age, educational attainment, marital status, family income, and husband's income were significant in predicting women's participation. Furthermore, women are given secondary, easier tasks than men, participating in fisheries impacts women’s economic contribution and empowerment, and women in this industry still allot time for reproductive work despite spending most of their time accomplishing productive work in small-scale fisheries.
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    Contested waters: The Philippine national government and the plight of capture fisheries in Masinloc, Zambales
    Acelar, Benjie L.; Gonzales, Renzie Anne A. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2022-06)
    China’s militarized presence in disputed waters around Scarborough Shoal (Bajo de Masinloc) adversely affected capture fisheries in the area. Filipino fishers with low income and lacking advanced fishing technology faced greater vulnerabilities in the face of competition, threats, and harassment from foreign fishing vessels. The study examines the relationship between these Filipino fisherfolks and the Philippine government, in terms of security provided. The research utilized a state-centered relational approach and the concept of governance in explaining the dynamics of the relationship, the government being the law making and enforcing body in ensuring the protection of Filipino fisherfolks. The findings suggest a lack of compatibility and failure in communication in the relationship ofthe Philippine national government and the fisherfolks. This is due to the continued campaign of the fisherfolks for their safety and livelihood despite government undertakings. There is a greater need for measures by the Philippine government to secure the fisherfolks from the presence of Chinese fishing vessels in their traditional fishing grounds.
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    Survival of nursery-reared juvenile milkfish, Chanos-chanos at different transport density, temperature and anaesthetic combinations
    Failaman, Alan N. (University of the Philippines Visayas, 2020-06)
    Experiments were conducted to optimize transport conditions of nursery cultured juvenile milkfish in a closed plastic bag based transport system. In the first experiment combined effects of temperature (25-27°C, 20-22°C and 15-17°C) and anesthetics (2-phenoxyethanol at 200 mgL-1 for initial sedation and 80 mgL-1 for transport sedation) on oxygen consumption and survival ofjuvenile milkfish, Chanos chanos, were evaluated. Another experiment was conducted to optimize transport conditions at fish densities of 200, 400, 600, 800 and 1000 gL-1 for 4, 8, 12,16 and 20 hour duration. The study showed no significant difference on oxygen consumption rates ofmilkfishjuveniles subjected to various water temperature range and anesthetic combinations. Temperature range of 20 to 22°C in combination with anaesthetic (2-phenoxyethanol) application was the best condition for long duration confinement of milkfish juvenile in closed plastic transport bags. The study established the optimum juvenile milkfish transport density and the effective transport duration. With anaesthetic application (2-phenoxyethanol), juvenile milkfish density of 600 gL-1 is effective for 20 hours oftransport duration, 800 gL-1 for 8 hours oftransport duration and 1000 gL-1 effective for 4 hours transport duration. These results provide a practical protocol for the transport of juvenile milkfish from the nursery culture area to the grow-out production area.
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    Effects of dietary pH on growth performance and feed utilization of Nile tilapia (Oreochromis niloticus)
    Fabay, Ryan V. (University of the Philippines Visayas, 2020-06)
    Two feeding trials were conducted to investigate the effects of dietary pH (pH 2.5, 3.7, 4.6, 5.7-control, pH 7.0, and pH 8.0) and dietary acid source (acetic acid, citric acid, hydrochloric acid and control-no acid) on growth rate and feed utilization efficiency of the Nile tilapia fry. In addition, attractability indices of the diets at different pH and dietary acid sources were determined. Results of the first feeding trial showed that the feed with pH adjusted to 4.6 resulted in increased growth rate and improved feed utilization efficiency in the Nile tilapia. In the second feeding trial, the use of either hydrochloric, citric or acetic acid in adjusting the pH to the optimal 4.6 did not affect the growth performance of the fish. This study demonstrated that pH and not actually the kind of acid diet promoted growth and efficiency in the Nile tilapia fry. Furthermore, this study provides new information on the use of acid in aquaculture as feed additive for tilapia fry, which can be added to fish feed literature.