UPV Theses and Dissertations
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Item The effect of different feeding schemes on mudcrab Scylla serrata larvae fed with Artemia salinaBachoco, Anabelle M. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1998-04)The study on the effect of different feeding schemes of mudcrab Scylla serrata fed with Artemia salina was conducted to identify the zoeal stage of S. serrata where an addition of Artemia to the diet results to higher survival, shorter intermoult duration, higher growth index, and shorter metamorphosis to the megalopa stage. All treatments were fed with Brachionus at a density of 20 ind./ml. Results showed that larvae fed with Artemia from day 0 had consistently high percent survival and this is significantly higher compared to other treatments. This was followed by larvae fed with Artemia at day 3 and at day 6. However, statistical analysis showed that there is no significant difference between the two treatments. Significantly low percent survival was obtained on larvae fed with Artemia at day 9. Results also showed that larvae fed with Artemia at day 0 metamorphosed to megalopa stage after 18 days and obtained the shortest average intermoult duration of 3.6 days and highest growth index of 5 6. This was followed by larvae fed with Artemia at day 3, day 6, and day 9. Artemia has high nutritive value which contributed to high survival, shorter intermoult period, high growth index and shorter metamorphosis period up to the megalopa stage.Item Costs and returns of backyard hog fattening: A comparative study of members and non-members of the Katin-aran Center in Pavia, IloiloAsuncion, Allan V. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1993-10)This study evaluates and compares the economic performance in backyard hog fattening of members and non-members of the Katin-aran Center in Brgy. Amparo Pavia. Iloilo. Primary data was gathered using an interview schedule from 42 members and 33 non-members. Half of the member respondents raised four piglets, while the majority of the non-member respondents raised one piglet. In the purchase of piglets, all of the respondents purchased their piglets using the visual inspection. In the selling of the fattened hogs, most of the respondents used the visual inspection method, while a few of them used the liveweight method. Most of the member respondents purchased their □iglets at the age of 46-60 days old. The non-member respondents purchased their piglets at ages 30-45 days and 46-60 days. Member respondents employed not only the dry and wet feeding method, but also practiced both methods to increase the weight of their piglets, while the non-member respondents used only the dry and wet feeding method. Most of the respondents fed their hogs three times a day with different kinds of feeds, such as kangkong. rice/corn bran, hogmash, and fishmeal. The majority of the respondents cleaned their hogpens once a day. gave supplementary treatment, dewormed, and vaccinated their piglets. Most respondents bathed their piglets once a day. The results of the study agreed with its hypothesis that members of the Backyard Hog Fattening Project of the Katin-aran Center earn higher profits and returns than non-members. Member respondents also yielded a higher rate of return on investment, rate of return on total operating cost, ratio of profit to variable cost, and ratio of profit to total revenue than non-member respondents. The problems encountered by the respondents include limited capital high cost of feeds. the unpredictable weather conditions and temperature. pests and diseases. inadequate water supply and the disposal of wastes.Item Comparison of the length-weight relationship between starved and fed Scylla tranquebarica crabletsArroyo. Ritchel B. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2003-04)This study aimed to determine the length-weight as well as the width-weight relationships of the Scylla tranquebarica crablets when starved and fed during the intermolt and premolt stages. Molt stages were identified and then the crablets were subjected to feeding or starvation for 36 days. Regression analysis showed the length-weight relationship of the Scylla tranquebarica crablets, including carapace length, carapace width, and body weight when fed and starved. Regression lines for each category differed from one another. Results showed that the fed crablets in intermolt and premolt stages showed greater body weight gain per unit carapace length and carapace width. The intermolt fed gave the highest weight gain per unit length and unit width among the treatments. Equations for interconversions of length and weight and for length and width are reported for the premolt and intermolt stages when fed and starved.Item Project EDI WAM!: Everybody Do It: War Against Malnutrition in Brgy. Roma, San Joaquin, IloiloBalogo, Philip G.; Bomediano, Maria Jonnah R.; Esparagoza, Marevi T.; Gallo, Czareena Anne; Mallari , Maria Katerina; Murillo, Gilbert Guy D.; Ortono, Jevi Marie P.; Oteda, Kristine Joy D.; Pameroyan, Nesly Joy G.; Radones, Charmaine Mae Keyien G.; Santocildes, Camille S.; Tirador, Anna Katharina L. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-05)The Millenium Development Goals for the Philippines by 2015 is to reduce the underweight-by-age prevalence to 17.2% among 0-5 years old children. So far in 2013, the prevalence decreased from 20.7% in 2003 to 19.9%. Western Visayas ranks second (26.0%) in the most malnourished regions in the country, with trends increasing in Iloilo from 25.1% in 2008 to 27.4% in 2013. According to the National Nutrition Council, this small change in number for the past 10 years makes it unlikely that the country will achieve its MDG. Project EDI WAM! Every body Do It: War Against Malnutrition in Barangay Roma, San Joaquin, Iloilo aims to decrease the prevalence of malnutrition by 70% among children aged 24 to 72 months. Operation Timbang showed that out of the 42 children, 11 were identified as malnourished, giving a prevalence of 26.19%. Project EDI WAM! aims to decrease the number of undernourished children through health education, feeding, and supplementation programs. A functional core group of 9 members was formed and was later transformed into a Barangay Health Board. Cooking lessons dubbed Pinoy Mother Chef improved the mothers' food preparation practices and behavior. Hygiene and Sanitation increased by 36.60%, while proper meal planning increased by 24.83%. Ready-to-Use therapeutic food (RUTF) was prepared and supplemented to the children. Knowledge of mothers on health and nutrition also increased by 35.54%. Out of the 11 malnourished children, 4 were turned to normal, giving a decrease of 36.36%. The 70% goals was not achieved and may be attributed to the short period of time that the project was implemented. However there is a significant increase in weight among all the recipients (2.79% ) and malnourished (4.92%). A Mothers’ Association was established to continue the project advocacy, making the cooking and feeding program an annual event.Item Effects of high and low protein diets on the gut evacuation rate of Tilapia niloticaAndrada, Bryan Andrew S. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1999-03)Gut evacuation rate of young Nile tilapia, Tilapia nilotica fed commercial pelleted diets containing high or low protein diet were determined in the laboratory. The decline in gut fullness of the fish with time was examined at low and high protein diets. Two mathematical models were used to express the decline in gut fullness of the fish with time. Fish fed the low protein diet followed more closely the linear model while those fed the high protein diet followed the logarithmic model. The level of protein resulted in different gut evacuation rates (GER), expressed as coefficients b of the gut fullnesstime curve. GER values were higher in either linear or logarithmic models for fish fed low protein diet than for those fed high protein diet.Item Diel feeding patterns of angelwing clam Pholas (Monothyra) orientales (Gmelin, 1970)Alojepan, Marbe Joy L. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1999-04)Filtration rate of Pholas orientalis measured using the indirect suspension deletion method and monitored by direct algal cell counts. Phytoplankton Isochrysis galbana was used as food at an algal cell concentration of 2.5 x 103 cells ml ”'. Biological rhythms have been demonstrated in all animals and plants except bacteria. They control rhythmic patterns in behavior and physiology of a living organism. Biological rhythms, or oscillations, have a “period” that is measured from one arbitrary point or phase of the rhythm to the next occurrence of that phase. They are best demonstrated in a 24 h cycle or circadian cycle. There is a widely varying feeding activity in the 24h cycle of P. orientalis observed at a constant temperature of 27$C and hydrogen ion concentration of 35%o Like any other bivalves, P. orientalis has defined feeding periods equivalent to food uptake at 2400h-0300h. Such observation could be supported by a previous study by Corda stating that optimal feeding was obtained at total darkness. Periods of digestion occur shortly after the periods of feeding. P. orientalis when actively feeding were observed to have extended siphons, larger valve openings, and an inclination of 45. One primary external stimulus that affected filtration rate was the amount of light present. Biorhythms provide temporal information, such as the time of day or season of the year, which facilitates adaptation of the organism to internal or external environments.Item A comparative study of the effects of supplementary feeding and artificial substrate on the production of milkfish fingerlings in brackishwater pondsAdeyemi, Frederick F. (University of the Philippines Visayas, 1983-03)The growth and survival of milkfish fry in response to supplementary feeding and artificial substrate were evaluated at stocking densities of 75 and 100 fry/m2 for a period of 56 days from August 21 to October 15, 1982. The study was conducted in eighteen 40m2 experimental nursery ponds of the University of the Philippines Brackishwater Aquaculture Centre, Leganes, Iloilo. A 3 x 2 factorial experiment in completely randomized design was used and six treatment combinations between level of inputs (no inputs, supplementary feeding or artificial substrate) and stocking density (75 or 100 fry/m2) were investigated with three replicates per treatment. The best fish growth was obtained in Treatment VI (100 fry/m2 with substrate) with mean final weight and length of 1.59 gm. and 5.36 cm. respectively while Treatment IV (100 fry/m2 without feeding or substrate) gave the poorest fish growth with mean final weight and length of 0.83 gm. and 4.60 cm. respectively. Differences in mean weight and length among treatments were, however, not statistically significant. Mean percentage survival was significantly higher at a stocking density of 75 fry/m2 (82.8%) than at 100 fry/m2 (64.1%) but supplementary feeding or artificial substrate ix did not show any statistically significant effect on survival. At either 75 or 100 fry/m2 stocking density, supplementary feeding gave a numerically higher percentage survival than artificial substrate. Economic analysis revealed that a stocking density of 75 fry/m2 without supplementary feeding or artificial substrate was the most profitable treatment with a return on investment of 39.2%. At a stocking density of 100 fry/ m2, supplementary feeding with rice bran was more profitable than the use of artificial substrate with returns on investment of 22.6% and 9.1% respectively.Item Growth and yield Rabbitfish (Siganus guttatus) reared in river floating net cages at various stocking densities and feeding schemesAbalos, Rosie S. (University of the Philippines Visayas, 1995-03)Six treatment combinations consisted of three stocking densities of 50, 100, 200, rabbitfish (Siganus guttatus) per cubic meter (m3) at two feeding schemes of sliding 10, 8, 6, 5% commercial feed of fish biomass (F1) and 5% commercial feed of fish biomass daily with Chaetomorpha linum. "lumut" fed to satiation (F2) were tested to determine the growth and yield of rabbitfish in river floating net cages for 120 days. The F1 at stocking density of 50 fish/m3 and fed commercial feeds daily at sliding (10-8-6-5% BW) feeding scheme registered the highest mean growth of 105.6 g/fish. However, statistical analysis showed no significant difference (P>0.05) in growth among treatments. In terms of production, the F2 at 200 fish/m3 and fed commercial feeds at 5% BW plus "lumut" registered the highest mean production of 18.23 kg/m3 . Production was highly significant (P<0.01) in between stocking densities but not between feeding schemes. Survival (90 - 96%) and mean feed conversion ratios (3.6 - 4.4) were not significantly different (P>0.05) among treatments. Rearing S. guttatus in floating net cage at 200 fish/m fed commercial feeds daily at 5% BW plus "lumut" fed to satiation appeared to give the highest net income of P705.96/m and a benefit-cost-ratio of 1.42.