UPV Theses and Dissertations
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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 Composition of abundance of meiofaunal assemblages found in Banate Bay during NE monsoon and early summerArrivas, Johny Kevin B. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-05)The study was conducted in Banate Bay, Philippines to describe the composition and abundance of the meiofaunal assemblage in the area. Field sampling was done during December 2012 and March 2013. A total of 41 taxa were identified, dominated by nematodes followed by harpacticoid copepods. The overall mean density of meiofauna in the shallow waters of Banate bay was 28.8 ind.cm'2. The high meiofaunal density recorded in the present study was due to sediment granulometry, water depth and percent organic matter. Macrofauna: meiofauna ratio was also high due to sparse number of macrofauna observed and the physical disturbances associated with seasonal rainfall. The highest density was recorded in March 2013 and the lowest was recorded in December 2012, albeit no significant difference. The temporal distribution of meiofauna was positively correlated with salinity (R = 0.59). Seasonal rainfall also influenced the meiofaunal abundance by affecting turbidity and salinity as well as causing physical disturbances (e.g., storm). Spatial distribution of meiofauna between the stations was influenced by salinity rather than the sediment granulometry, organic matter and turbidity.Item Echinoid and Ophiuroid species in Taklong Island National Marine Reserve (TINMR), GuimarasAlmira, Eugenie Marie A. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-06)Taklong Island National Marine Reserve (TINMR) in Guimaras is one of the Philippines’ marine protected sites established to ensure continuity and productivity of marine organisms such as echinoderms. The study aims to determine the community structure of echinoid and ophiuroid species in selected shallow coastal sites around Taklong Island within TINMR. Sampling was done twice (June 2014 and Jan 2015) using belt transect method for echinoid species in three selected sites and random quadrat method for ophiuroid species in two sites. A total of twelve (12) echinoid and six (6) ophiuroid species were recorded. The most numerous echinoid and ophiuroid were Echinotrix calamaris and Ophiocoma erinaceus, respectively. The diversity of echinoids (H’= 0.37-0.95) and ophiuroids (H’= 0.53-1.40) in Taklong Island was relatively low. Presence and abundances of many echinoids and ophiuroids in a site varied with sampling time. Variation may be due to differences in substrate characteristics such as sea grass cover and coral cover as well as environmental factors.Item Relation of size and sex to the natural diet of the red crab Charybdis feriatus Linnaeus (Brachyura: Portunidae) from Pilar-Capiz Bays, Northern PanayAlabia, Irene Dolorfino (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2003-03)A total of 395 (males= 282; females=113) specimens of the red crab Charybdis feriatus were collected from Pilar-Capiz Bays from January-December 2002 and were used for the present study. Relative fullness index were computed for both sexes of different size classes. Results showed that stomachs of females were slightly fuller than that of males. Similar observation was made between juvenile and adult specimens. A total of 75 (males= 57; females= 18) gut contents were analyzed in detail. Major food items in the diet of the crabs include unidentified matter, unidentified eggs, fish, crab, and shrimp remains. Frequency of occurrence and combined visual estimation of unidentified organic matter were used for the examination. No dietary differences due to ontogenetic change were observed in the species while diet of male crabs were found to be more varied than those of females. However, frequency of occurrence of major food items in the stomachs of both sexes was comparable.Item A preliminary investigation on the physico-chemical parameters of the habitat and associated flora of Rafflesia sp. along the western side of Sibalom Natural ParkAlacapa, Lilluck F. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2003-04)Rafflesia, bearing the largest flowers in the world, was found to exist in Sibalom Natural Park. In view of efforts to conserve the Rafflesia site, this study entitled, “A preliminary investigation on the physico-chemical parameters of the habitat and associated flora of Rafflesia sp. along the western side of Sibalom Natural Park”, aims to come up with information as to what conditions do these flowers grow and their associated flora. This study hopes to help strengthen biodiversity conservation efforts of the Department of Environment and Natural Resources. The study had ten sampling sites, five of which with the existence of Rafflesia sp. and five of which without Rafflesia sp.. In each of these areas the data gathered were girth of trees, saplings and seedlings, list and number of existing flora within the area, soil pH, soil texture, soil and air temperature, and relative humidity. The study found that the Rafflesia sp. in the Sibalom Natural Park grows at high relative humidity, relatively cool air and soil temperature, in soil with high amounts of clay and nearly neutral pH. The Rafflesia sp., aside from its host vine, exists with the plant locally known as ban-ban. No species of plant was found to dominate the areas where Rafflesia sp. exists.Item Prevalence of substance use among college students of state colleges in IloiloAgreda, Joji Marie Gela; Corio, Razel Joy Luceno; Hervas, Jeneline Espanol; Icabandi, Donna Joy Tabor; Melarin, Dianne Vallecera; Mosura, Joenalie Montano; Suspeñe, Rhoda Belandres; Vallejo, Arleen Joy Calanao (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2004-04)This study aimed to describe the prevalence, nature, and extent of substance use of college students enrolled in the main campuses of state colleges in Iloilo. There were 402 respondents coming from the main campuses of Iloilo State College of Fisheries (ISCOF), Northern Iloilo Polytechnic State College (NIPSC), Western Visayas College of Science and Technology (WVCST) and the lone campus of New Lucena Polytechnic College (NLPC). Data was collected through a questionnaire which was modified from the model core questionnaire developed by the World Health Organization (WHO). Results showed that 36.1% of the respondents had tried smoking. Their mean age of smoking initiation was 17 years with 13.5% having first tried smoking before 15 years of age. Their top three reasons for smoking are as follows: curiosity (44.1%), for fun (25.5%) and peer pressure (17.2%). Of the respondents who smoked within 30 days prior to the survey, 14.7% consumed more than 5 cigarettes per day. The results also showed that 33.8% of the respondents who have tried smoking usually smoke during parties while their usual place to smoke is either in their houses, dormitories or boarding houses (40.7%). There was a significant relationship between the smoking status of the respondents who have tried smoking and the following: gender (p < 0.0001), age (p = 0.0004) and year level (p < 0.01). On the other hand, smoking status of the respondents who have tried smoking has no significant relationship with the following: annual family income (p = 0.91). living arrangement (p = 0.63) and membership in fraternities/sororities (p = 0.17). Alcoholic use had a higher prevalence (65.4%) than cigarette smoking (36.1%). The mean age of those respondents who have tried drinking was also 17 years with 13.7% having tried drinking at an age below 15 years. Their top three reasons for drinking are: for fun (34.6%), curiosity (29.3%) and because family members drink (12.9%). Seventy percent of the respondents who have tried drinking drank 30 days prior to the survey with 10.9% consuming more than 5 bottles and another 10.9% consuming more than 5 glasses of alcoholic beverages. Of those who have been binge drinking 30 davs prior to the survey, 18.9% have been binge drinking 3 to 5 times. The usual occasion for the respondents to drink is during parties (72.9%) and the usual place for them to drink was either in their houses, dormitories or boarding houses (60.8%). The beverage of choice is beer (59.7%). The drinking status of those who have tried drinking had a significant relationship with the following: gender (p < 0.0001), year level (p = 0.005) and membership to fraternities/sororities (p = 0.04). Meanwhile, drinking status had no significant relationship with age (p = 0.06), annual family income (p = 0.85) and their living arrangements (p = 0.51). Shabu use had a prevalence of 2.7% among the respondents. The mean age of shabu use was also 17 years with 18.2% first trying it at 15 years of age. Their reasons for having tried shabu are: peer pressure (45.5%), curiosity (18.2%) and for fun (18.2%). Within 30 days prior to the survey. 45.5% of those who have tried using shabu have used shabu and 20.0% have used shabu in 20 or more days. They usually use shabu during parties (54.5%) and usually have tried using shabu either in their houses, dormitories and boarding houses (54.6%). Data shows that shabu use had a significant relationship with the following: gender (p = 0.0007). year level (p = 0.003) and fraternity/sorority membership (p = 0.05). It has no significant relationship with age (p = 0.09). annual family income (p = 0.92) and their living arrangements (p = 0.47). Results also showed that 5 % of the respondents have tried smoking marijuana and 4.2% have tried opiate type drugs. The mean age for having tried drugs other than shabu was also 17 years with 26.3 % having tried them at an age below 15. Thirty-one percent of those who have tried other drugs than shabu have tried within 30 days prior to the survey.Item Comparison of the growth of green algae, Nephroselmis sp. at different mediaAgana, Julie Ann E. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2004-03)Green algae play a significant role in the maintenance of the hatchery of economically important crustaceans, where a continuous supply of algae is needed to feed the larvae. Moreover, microalgae have the potential to be used to produce chemically complex molecules, which are difficult to synthesize. Thus, the present study was conducted to compare the growth of the green algae, Nephroselmis sp., using three different media. Specifically, the study aims (1) to compare the effect of different media on the growth of Nephroselmis sp. and (2) to determine which medium is the most suitable for growth of Nephroselmis sp. The result of the study showed that there was no significant difference in the growth of the green algae Nephroselmis sp. at three different media. The results showed that quantities of chemical composition of the different media are already sufficient for the growth of Nephroselmis sp.Item The relationship between the intensity of common soil-transmitted intestinal helminthiasis and nutritional status among schoolchildren of Miagao-West Central Elementary School (MWCES), Miagao, IloiloAlojepan, Jake L.; Lee, Raymond V.; Mediodia, Harold P.; Tansiongco, Venjune P.; Tubola, Keith Anthony V. (Division of Biological Sciences,, 2003-03)This study aimed to determine the relationship between the intensity of infection of common soil-transmitted intestinal helminths (STH): Ascaris lumbricoides, Trichuris trichiura and Hookworm species (Ancylostoma duodeuale and Necator americamus) and nutritional status among schoolchildren of Miag-ao West Central Elementary School (MWCES). This study also aimed to determine the prevalence of STH infection and nutritional status, either stunted or underweight schoolchildren. There were 285 study participants out of 436 schoolchildren of Miag-ao West Central Elementary School. Stool samples of the study participants were analyzed using Modified Kato-Katz Technique to determine the intensity of infections. The study participants were grouped according to the intensity of infection: negative, light and moderate to heavy. Nutritional status of the study participants was also determined and was classified into stunted, underweight and normal. Height-for-age value was used to determine stunting and weight-for-age value to determine those who are underweight. Frequency count was used for the descriptive analysis of the data gathered. The Chi-square test for association was used in the inferential statistics. The result of the study reveals that 51.2 % of the respondents were infected with Ascaris lumbricoides, 36.5 % with Trichuris trichiura and 4.9 % with hookworm. The findings also show that 16 8 % of the respondents were stunted and 27.4 % were underweight. Finally, study reveals that there is no significant relationship between the nutritional status and the intensity of infection of common soil- transmitted intestinal helminths among the schoolchildren of Miag-ao West Central Elementary School (p= 0 706)Item Effect of salinity on survival and growth of Scylla olivacea crabletsAndres, Eileen Beth N. (Division of Biological Sciences, College of Arts ad Sciences, University of the Philippines Visayas, 2002-04)The effect of salinity on survival and growth of Scylla olivacea crablets was investigated. Salinities of 12, 16, 20, 24 and 32 ppt were used as treatments. Survival, molt interval and growth in terms of weight, carapace length and carapace width were measured for two molts. Growth was measured three days after every molt. There was no significant difference on survival of the crablets between salinities at molt 1. At molt 2, survival was significantly higher at 32 ppt compared to survival at 12 ppt but not significantly different from survival at 24, 20 and 16 ppt. Moreover, duration of survival was significantly higher at 32 ppt than at 16 and 12 ppt but not significantly different from durations of survival at 24 and 20 ppt. On the other hand, molt interval was not significantly different at salinities of 12, 16, 20, 24 and 32 ppt from C1 to C2 and from C2 to C3. Although the highest weight, carapace length and carapace width were observed at 20 ppt at molt 1, there was no significant difference in growth of the crablets at different salinities. At molt 2, the highest weight was at 32 ppt, the highest carapace length was at 24 ppt and the highest carapace width was at 16 ppt and 32 ppt. No significant difference was found in growth of the crablets between salinities at molt 2.Item 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.