UPV Theses and Dissertations
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Item Habitat-type and temporal comparison of the meiobenthic composition of Taklong Island National Marine ReserveBurgos, Lorelie A. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2009-03)Meiofauna are very important indicators of human disturbances in the natural ecosystem. It plays a major role in the primary production, rapid nutrient cycling and other benthic chemical processes. Knowledge regarding marine benthic communities is scarce and is limited only to temperate regions. Moreover, only a few have been conducted in the Philippines, while no studies have been conducted in the Taklong Island National Marine Reserve, Nueva Valencia, Guimaras, so this serves as the baseline for further studies to be conducted in the place. This study provides a characterization of the spatial and temporal distribution of meiobenthic fauna in the Taklong Island National Marine Reserve. Specifically, the study aimed to compare the composition of meiobenthic infauna in different habitat types and to examine changes in their abundance and distribution from 4, 16 and 26 weeks after the oil spill. Meiobenthic samples were collected in Taklong Island National Marine Reserve during the Rapid and Monitoring Phases of the Benthos Project of the UPV Oil Spill Response Program. Surveys were conducted in September 2 and November 23, 2006 and February 9 2007, respectively 4, 16 and 26 weeks after the spill. Nine stations within the area were chosen based on the station grid for the biological surveys. A total of 20 taxa were identified, with nematodes being numerically dominant. It also showed the highest mean abundance in all the sampling period and for the entire habitat type. The over all mean density was (80276.71494 ind. m2, SD =19988.37), with the highest peak in February 20072007 which is 26 weeks after the oil spill (143,508.4 ind/m2). And the lowest density was recorded in the month of September 2006, 4 weeks after the oil spill (47,205.43 ind. m2). For the habitat type soft bottom has the highest recorded mean density in the entire sampling period. For the temporal variation food source, organic matter and temperature dictates the changes in distribution of meiofauna but in the study it mostly because of the oil spill happened before the sampling period.Item Abundance, composition and vertical distribution of calanoid copepods in Central Sulu seaBurgos, Lora A. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)Calanoid copepods are dominant component of the copepod community, which in turn highlights their influence on the overall zooplankton assemblage of the water column. Studying their abundance and distribution, is important on understanding their role in the dynamics of commercially important organism like the fish. Calanoid samples in study, were part of the zooplankton samples taken during the Joint PhilEx oceanographic cruise on board RAZ Melville in December 2007 in the Central Sulu Sea from MOCNESS station 29. Calanoid abundance, composition and distribution were investigated. Fifteen (15) calanoid families were identified all throughout the water column (0 - 400 m). The calanoid assemblage was dominated by 27 % Eucalanidae, 12 % Rhincalanidae, Scolecitrichidae with 7 % and other families contributing to roughly 19 % of the total. The water column was divided into 2 distinct depth cluster based on species distributions; (1) layers above thermocline (0 - 150m) and (2) deeper layers (200 - 400m). Furthermore, upper layers were characterized by distinctive calanoid family assemblage which includes; Calanidae, Euchaetidae, Eucalanidae, Candaciidae, Rhincalanidae, and Temoridae. While deeper layers, calanoid families includes; Metridinidae, Scolecitrichidae, Rhincalanidae, and Euchaetidae. ANOSIM results showed significant differences between these depth clusters, with global R = 0.81 and p = 0.01. These appear to be highly related to the thermocline in both stations, where typically higher upper-layer primary productivity can support dense communities of zooplankton.Item Economic valuation of seagrasses in Nueva Valencia, Guimaras: A contingent valuation studyBundal, Kristine Shiela Mae B.; Taperla, Roald Ray B. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-06)This study assessed the willingness of the residents of Guimbal, Iloilo, to pay for the conservation of seagrasses in Nueva Valencia, Guimaras. The study was conducted to find solutions to the problem of growing seagrass decline in the area. The lack of necessary policies or programs and conservation financing, that would protect and improve the integrity of the resource are putting a lot of pressure not only on the associate resources, but also on the livelihood of the people who are dependent on the resource. The contingent valuation method (CVM) was used to elicit people’s willingness-to-pay to contribute to a conservation trust fund for the protection and improvement of the state of the estimated 20- hectare area of seagrasses in Barangay Tando. It has been under serious threats of rapid decline ever since the occurrence of the 2006 M/T Solar-1 oil spill, which also affected the area. The study found out that 89.32% of the respondents would be willing to pay to support the conservation of the seagrass ecosystem. The study also found out that the primary motivation behind the willingness-to-pay of the respondents was their concern for the benefit of future generations. In addition, based on the people’s WTP, an estimated amount of PHP 900,917.64 could be raised annually to fund or support the conservation of the seagrasses and its associate resources in Barangay Tando. Given this potential source of revenue, the residents preferred a payment collection scheme through additional taxes on property or utility bills like electricity bill. Furthermore, this study reveals pertinent socioeconomic and conservation financing implications that need to be considered in managing seagrass resources.Item Mangrove community structure survey in Barangay Guisi and Linayasan, Altavas, AklanBullo, Gliford G. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2004-04)The mangrove forest is a complex and unique community of medium to large tress, shrubs, vines and palms, oddly thriving with luxuriant growth in the least inviting habitats which have the barest and limited conditions for the growth and survival of higher plant life. This study aims to assess the community structure of mangroves in Barangay Guisi and Linayasan, Altavas, Aklan using accepted ecological indicators. The sampling site, Altavas, Aklan is located at the upper median of Panay Island. There was a total of 15 true mangrove species belonging to the 9 families in the area. The nine families are Family Myrsinaceae represented by Aegiceras corniculatum, Family Avicenniaceae represented by Avicennia alba, Avicennia marina, Avicennia officinalis and Avicennia rumphiana; Family Rhizophorceae represented by Rhizophora apiculata, Rhizophora mucronata, Bruguiera gymnorrhiza and Bruguiera parviflora; Family Bombacaceae represented by Camptostemon phihppensis; Family Rubiaceae represented by Scyphiphora hydrophylaceae; Family Meliaceae represented by Xylocarpus granatum and Family Palmae represented by Nypa fruticans. Avicennia rumphiana has the highest mean basal area of 23.21 (m2/ha), while Xylocarpus granatum had the lowest mean basal area of 0.01 (m2/ha). Avicennia rumphiana has the highest relative density of 57, while Xylocarpus granatum has the lowest relative density with a value of 1. Avicennia rumphiana and Avicennia officinalis had the highest relative frequency of 19.8667 Aegiceras corniculatum, Excoecaria agallocha, Scyphtphora hydrophylaceae and Xylocarpus grunatum on the other hand had the lowest relative frequency of 0.4. Avicennia rumphiana is the dominant species with a relative dominance value of 23.66, and Xylocarpus granatum is the least dominant species with relative dominance value of 0.01. Avicennia rumphiana is the most important species in the area with an importance value of 127.1816, and the least important species, as observed, is Xylocarpus granatum with an importance value of 1.685863. The index of diversity is 0.918655 for the entire area.Item Vulnerability to natural hazards of households in the coastal Barangays of New Washington, AklanBulacan, Nirvana Dominique F.; Carillo, Shelica Cheyene T. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2015-06)Natural phenomena such as typhoon, flood, storm surge, sea level rise and coastal erosion are some of the natural hazards that affect the world especially the coastal inhabitants. In line with this, coastal inhabitants are considered the most vulnerable to natural hazards. This study explores the vulnerability and socio-economic factors affecting it. This study aims to determine the extent of vulnerability to natural hazards of households in coastal barangays of New Washington, Aklan. Vulnerability Index (VI) was used to measure vulnerability in terms of natural hazard exposure, sensitivity and adaptive capacity. While, Vulnerability as Expected Poverty (VEP) was used to determine socioeconomic factors that may affect vulnerability. The VI results to low vulnerability of households. Whereas, VEP determined some socio-economic factors that statistically affect vulnerability in terms of per capita consumption expenditure such as highest educational attainment and employment in agriculture or industry of the household head, land ownership, number of family members and income per capita.Item The adsorption capacity of silica gel and rice hull ash on phenol and anilineBulatao, Ben Fermin P. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2011-04)Chemical waste has been a problem here in the University of the Philippines Visayas, Miagao, Iloilo. Various methods of removal have been utilized. Extraction of silica gel from rice hull and rice hull ash was used to remove organic compounds (phenol and aniline). In this study, silica gel and rice hull ash adsorption on phenol and aniline were investigated with varying contact time and initial concentration. Silica gel reaches its optimum adsorption of both phenol and aniline at 60 minutes contact time. Silica gel was the basis for rice hull ash’s contact time because rice hull ash is 90% by weight silica gel.. Silica gel-phenol system decreases it adsorption capacity as the initial concentration is increased from 25 ppm to 100 ppm. Rice hull ash- phenol system, on the other hand, shows that the adsorption capacity increases as the initial concentration is increased. Both on silica gel-aniline system and rice hull ash- aniline system have increasing adsorption as initial concentration is increased. As the contact time is increased, adsorption increases only until it reaches its optimum adsorption which is 60 minutes contact time where saturation is reached. Increasing initial concentration however has different effect on adsorption on all system explained by the adsorption isotherms. The isotherms show that phenol has the fastest rate to form a monolayer (K and Q°) with the greatest binding strength (b) on silica gel. It is also observed that phenol and aniline formed a monolayer (1/n) on the surface of the silica gel and rice hull ash.Item Antifungal activities of alginate films incorporated with lemon grass (Cymbopogon citratus) essential oil on sliced breadBronzal, Lucile A. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)The accumulation of non-degradable and non-recyclable waste materials leads researches to venture on biopolymer films which have been regarded as the promising green substitutes of non-biodegradable plastic materials. However, food products can be subjected to contamination by bacteria and fungi. The addition of plant derived essential oil can control microbial contamination of foods by reducing the growth rate of target microorganisms or by inactivating microorganisms by direct or indirect contact. Incorporating antimicrobial compounds into films provides a different way to improve the safety of ready-to-eat foods. In this study, the efficiency of synthesized alginate films incorporated with lemon grass essential oil (LGEO) for antifungal activity on white bread was evaluated. Two sets of film were prepared the (1) LGEO - Ethanol incorporated films and (2) LGEO — β-cyclodextrin inclusion complex films via solution casting method. Furthermore, the FTIR analysis of the generated films was also assessed to identify the functional groups present in the film that facilitates its antifungal property. Experimental results showed that LGEO enhanced the antifungal properties in the films and significantly slowed down the propagation of fungi on white sliced bread. After two weeks of storage, all bread samples packed with various film samples showed fungal growth. It was found out that citral is the main component of essential oil which contributes to the inhibition of fungal growth. The incorporation of LGEO in the film decreased the O-H peak absorbance while the inclusion complex in the film increases the O-H peak absorbance and broad O-H peaks were also obtained.Item The effect of different levels of salinity on the spanning of ablated mudcrab Scylla serrataBueno, Jesse L. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1994-04)Four salinity treatments with salinity levels of 15 ppt, 25 ppt, 35 ppt and 45 ppt with six replicates per treatment were utilized to determine its effect on the spawning of sexually mature bilaterally ablated mud crab Scylla serrata. The crabs range in weight from 250 grams to 580 grams and carapace width from 12.5 cm. to 16.5 cm. The results of the study showed significant difference (P<0.05) in the number of days when spawning occurred. The shortest duration when spawning occurred was at 25 ppt salinity with a mean value of 9.5 days. This was followed by 35 ppt and 15 ppt salinities with mean values of 15.69 days and 19.83 days respectively. Highest number of days when spawning occurred was at 45 ppt salinity at 24 days. All crabs died 2-3 days after spawning.Item The effects of compost produced from rice Oryza sativa straw and sugarcane Saccharum officinarum trash on the growth of pechay Brassica rapaBrizuela, Karlyn G. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2014-03)This study was designed to determine the effects of the application of compost produced from rice Oryza saliva straw and sugarcane Saccharum officinarum trash on the growth of pechay Brassica rapa. Experiments were carried out in a residential lot in Brgy. Punta Taytay, Bacolod City, Negros Occidental. Four set-ups were made with three replicates each. Each set-up corresponded to one compost treatment: treatment (A) was the rice straw compost, treatment (B) was the sugarcane trash compost, treatment (C) was the combination of rice straw and sugarcane trash compost, and treatment (D) served as the control in which no compost was added. The results of the statistical tests showed that there was a significant increase in the growth of pechay plants treated with the three different types of composts as compared to the pechay plants treated with the control. Among all the treatments, pechay plants treated with the combination of rice straw and sugarcane trash compost showed the highest growth yield in terms of the mean plant height (19.61 cm), mean fresh weight (44.95 g), and mean number of leaves per plant (8.99) at the time of harvest. Results also that showed that there was no significant difference in the mean fresh weight and mean number of leaves per plant at the time of harvest in pechay plants treated with the rice straw compost and the sugarcane trash compost.Item Mangrove community structure survey in Pedada Bay, Ajuy, IloiloBravo, Mark G. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2004-04)Mangroves are uniquely tropical, globally occurring and one of the most pervasive coastline ecosystems. They are one of the highly productive and one of the most diverse wetlands on earth. The objective of this study is to assess the community structure of mangroves in Pedada Bay, Ajuy, Iloilo, in particular the species composition and diversity in relation to the physical and chemical factors. Pedada Bay is located in the northern part of Panay Island. The transect line plot method was used to survey the community structure of the mangroves. The floristic composition of Pedada Bay was composed of a total of 18 true mangrove species belonging to 11 families. The true mangroves were Family Avicenniaceae represented by Avicennia marina and A. rumphiana, Family Bombacaceae represented by Camptostemon philippinensis, Family Combretaceae represented by Lumnitzera racemosa, Family Euphorbiaceae represented by Exoecaria agallocha, Family Meliaceae composed of Xylocarpus granatum and X. moluccensis, Family Myrsinaceae composed of Aegiceras corniculatum and A. floridum, Family Myrtaceae represented by Osbornia octodonta, Family Palmae represented by Nypa fruticans, Family Rhizophoraceae composed of Bruguiera cylindrica, Ceriops decandra, Rhizophora apiculata, R. mucronata, and R. stylosa, Family Rubiaceae, composed of Scyphiphora hydrophyllacea, and Family Sonneratiaceae, composed of Sonneratia alba. Average basal area for the entire Pedada Bay ranges from 300.564 m2/ha for Sonneratia alba to 0.008 m2/ha for Rhizophora mucronata. Average stems per hectare ranges from 1,988 for Avicennia marina to 5 stems per hectare for Aegiceras corniculatum. Of the three barangays of Pedada Bay, Barangay Pedada had the highest basal area while Barangay Luca had the lowest basal area. Sonneratia alba was the most dominant species in the bay. Avicennia marina was the densest, the most frequently occurring, and the most important species in Pedada Bay. The entire area had a high diversity index of 0.718. A distinct zonation pattern was observed in the area. Seedling density ranges from 1,421 seedlings for Sonneratia alba to 1 seedling for Scyphiphora hydrophyllacea. Sapling density ranges from 166 for Avicennia marina to 1 for Scyphiphora hydrophyllacea.