UPV Theses and Dissertations
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Item Philippine Muslim youths in Iloilo City: Their personal well-being, sense of national identity, and views on post 9/11 sociopolitical issuesBalilhe, Charinson C.; Guillerme, Kerry Anne O. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2007-03)This research examined the personal well-being, sense of national identity, and views on post 9/11 sociopolitical issues of Philippine Muslim youths in Iloilo City. Twenty-one (21) males and twelve (12) females, 13-27 years of age, unmarried, and of Maranao descent participated in this research. Scales were used to rate the respondents' personal well-being and for general ethnicity. A questionnaire for pride in being Filipino used to determine their sense of national identity, and an open-ended questionnaire to determine their views on post 9/11 sociopolitical issues. It was found out that the Philippine Muslim youths in Iloilo City have high level personal well-being where most respondents showed high scores in self-esteem, self-efficacy, and satisfaction with life. Most of the respondents also showed strong national identity. Respondents had held different views on post 9/11 sociopolitical issues. While 76% do not support the terrorists group, others (45%) do not support the man-hunt against it. and that 48% believe that the 9/11 event was plain terrorism.Item Influence of sediments of varying grain size composition on growth, survival and burrowing activity of the Ball Sea cucumber, Phyllophorus proteus (Bell,1884) juvenilesAmuenda, Jazriel Ann A. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2016-05)Phyllophorus proteus is a high-value sea cucumber species in Philippines but is also one of the most exploited. Hatchery-produced juveniles are used for stock enhancement as a means of restoring depleted population however biology of P. proteus have not yet been studied on. Burrowing incidence of ball sea cucumber P. proteus (Echinodermata: Holothuroidea) juveniles (4-5 length x ≤1mm width), growth, survival and their associated daily behaviour were compared in 3 different substrate collected from Sagay, Negros Occ. (A-mostly coarse), Panobolon, Guimaras (B-intermediate) and Carles, Iloilo (C-mostly fine). This was to establish the most suitable type of substrate to use in the culture system for this high-value sea cucumber. The highest incidence of burrowing was observed in sediment profile C but the difference in the mean number of burrowing individuals between treatments was statistically insignificant (p>0.05). After 4 weeks, growth of P. proteus juveniles was significantly higher (p<0.05) when reared on profile C (growth rate: 0.79±.13mm %d-l) than either profile B (p=0.009) (0.34±0.14 mm %d-1) or profile A (p=0.030) (0.21±0.11mm %d-1). Survival is highest in profile B (S=100%), intermediate in profile C and lowest in profile A although the difference is insignificant (p>0.05) Very fine-fine-grained sediments is the most preferred by ball sea cucumber juveniles while coarse sand seems to be unsuitable.Item Effects of sodium iodide-enriched brine shrimp (Artemia salina) on the growth, survival and metamorphosis of rabbitfish (Siganus guttatus) bloch larvaeCabanilla-Legaspi, Ma. Irene C. (University of the Philippines Visayas, 2018-06)Metamorphosis is considered the most crucial stage in larval fish development that dictates the overall larval fish survival and production output in a hatchery system. This physiological process is modulated by thyroid hormones produced from the thyroid gland the biosynthesis of which is dependent on the supply and availability of the mineral iodine. The present study evaluated the supplementation of iodine to rabbitfish (Siganus guttatus) larvae to determine the influence of this mineral on thyroid hormone levels, metamorphosis, growth performance, stress tolerance and survival. To efficiently deliver iodine to the larvae, the enrichment protocol was optimized by exposing the Artemia to increasing concentrations of this mineral (0.05 g L-1,0.1 g L-1, 0.2 g L-l, 0.4 g L-1 and 0.8 g L-1). The best iodine enrichment treatment was selected (0.8 g NaI L-1) and used to evaluate the influence of this mineral on larval development, growth, metamorphosis, stress tolerance and survival. Results suggest that growth of rabbitfish in terms of body weight was higher in the treated group (0.20±0.01g) as compared to the control group (0.14±0.01g). This significant growth response is associated with accelerated period of metamorphosis by 11.2 days and a lower muscle fiber count in the treated group (0.003±0.005 μm2-1). Higher levels of triiodothyronine (T3) and thyroxine (T4) were also observed in the group receiving the iodine-enriched Artemia that coincides with the larvae’s accelerated period to metamorphose. T3 in the treated group (15.31±1.22 ng g-1) is higher compared with the control (8.67±1.5 ng g-1) and T4 in the treated group (459.25±136.9 ng g-1) is also higher compared with the control group (170.86±92.55ng g-1) at 27 days after hatching which coincides with the onset of metamorphosis leading to early metamorphosis of larvae in the treated group. In addition, the present results showed that the larvae in treated group were significantly tolerant to stress, quantified as the cumulative stress index (15.33±2.40 CSI) indicating the positive response of the larvae to the dietary iodine enrichment. In summary, sodium iodide-enriched live food (Artemia) accelerated rabbitfish larvae metamorphosis, improved growth and stress tolerance in rabbitfish larvae. The results of this study can be used as a model iodine enrichment protocol to improve the hatchery output of other high-valued marine fish species in culture.