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    Comparative development of larval performance of catfish hybrids (Clarias macrocephalus Gunther x Clarias gariepinus Burchell)
    Cabanos, Cerrone Salamat (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2003-03)
    Our native catfish, Clarias macrocephalus, is one of the most well-accepted fish in the country. With its soft and savory flesh, this species has high demand in local markets. However, due to its relatively slow growth and poor breeding activity, our native catfish has become rarely used nowadays in aquaculture. This led to the introduction of exotic and faster growing species like the African catfish, Clarias gariepinus, and Thai catfish, Clarias batrachus, which in turn, resulted to the near extinction of the native species. There is therefore a perceived need to undertake a breeding program involving this native catfish and other exotic species. One potential solution to increase our production rate of the native catfish is to hybridize it with the African catfish. Interspecific hybridization has been a popular breeding program utilized by researchers attempting to produce fish expressing hybrid vigor (positive heterosis) or for combining valuable traits from more than one species. This study is on the characterization of the early developmental stages of fertilized eggs and the comparison of larval performance (in terms of percent fertilization, hatching and larval survival) resulting from the artificial cross of Clarias macrocephalus (native catfish) and Clarias gariepinus (African catfish) and its parental species. In comparing the rates of egg development among crosses (all macrolecithal and discoidal cleavage), it was determined that fertilized eggs of the standard hybrid cross (C. gariepinus male x C. macrocephalus female) have a relatively faster rate of development than those from the reciprocal cross (C. macrocephalus male x C. gariepinus female). Results on determination of larval performance showed that there is no significant difference in percent fertilization and percent survival after 7 days between hybrid and parental crosses. However, in terms of percent hatching, the reciprocal hybrid cross (C macrocephalus male x C. gariepinus female), together with the C. gariepinus x C. gariepinus parental cross had a significantly higher percent hatching (P < 0.01) compared to the standard cross (C. gariepinus male x C. macrocephalus female).
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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.