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    Analysis of the cost structure and profitability of small-scale catfish farming in Zarraga, Iloilo
    Biene, Brylle D.; Tayco, Zaphara Mae M. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2013-04)
    Catfish farming has contributed significantly to the economy of Zarraga, Iloilo. Currently however there are a few existing literature on the economic viability of the venture. This study was undertaken to bridge that gap. Nineteen small-scale catfish farmers were chosen as respondents of the study using simple random sampling method. This study evaluated the economic performance of small-scale catfish farming using cost and return analysis. Measures and indicators of profitability such as benefit-cost ratio, rate of return on capital investment, payback period and break-even points were solved to determine profitability. Sensitivity analysis was also done to examine the effect of changes in major variables on the profitability of small-scale catfish farms. Results showed that small-scale catfish farming in Zarraga, Iloilo is profitable with positive pure, gross and financial profit. The findings also indicated that it is more sensitive to changes in the market price of catfish compared to changes in the prices of major inputs such as feeds, fingerlings and labor. It is recommended that local government programs such as fingerlings dispersal and research supporting catfish farming will be carried out.
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    Comparative growth rates and gross morphology of hybrid catfish Clarias gariepinus (female) x Clarias macrocephalus (male)
    Agase, Mark Christian A. (Division of Biological Sciences, Bachelor of Science in Biology, University of the Philippines Visayas, 2004-03)
    Catfishes are among the groups that has been considered economically important fishes in the Philippines and in other countries. The freshwater catfish Clarias macrocephalus is native to the Philippines but it is becoming scarce in many natural habitats. It is a favorite food dish due to its tender and delicious meet. Aquaculturists these days focus more their attention to the culture of exotic species like Clarias gariepinus and Clarias batrachus that in turn resulted to the near extinction of the native species. There is therefore a need to undertake a breeding program involving this native catfish and other exotic species.A 12-week study was conducted to compare the growth rates of the hybrid catfish C. macrocephalus (♂) X C. gariepinus (♀) in natural ponds and laboratory rearing conditions. In addition, the length-weight relationship was also determined. Gross morphology was also noted in the experiment.Results showed that the trend for SGR of the hybrid in natural pond and laboratory rearing conditions from weeks 2 to 12 is decreasing. Continued feeding of the hybrids on artificial diets results in poor fish growth. T-test revealed that there is a significant difference on the SGR for both the length and weight with hybrids in natural pond rearing conditions being consistently higher than the laboratory set-up.From the linear regression equation, there was no homogeneity of regression, coefficients, or slopes in the mean body lengths (MBL) and mean body weights (MBW) of me hybrids in the natural pond and laboratory rearing condition. It simply means that there is a significant difference on the growth rates of the hybrid as to the type of environment they are reared. The product-moment correlation showed that there is a linear relationship between the length and the weight of the hybrid fish, 7.9305378 X 104 being the constant. Gross morphology of the hybrids includes the appearance of a trident-shaped occipital process, which was not pointed and narrow as in the case of the parent C. gariepinus. A turtle shell-like design arranged bilaterally characterizes the dorsal side of the head. A modification of the dorsal fin was also noted as to the presence of the adipose fin at the posterior end of the dorsal fin, which was about 3-5 mm in length.