UPV Digital Repository (UPV–DR)
The official Institutional Repository of the University of the Philippines Visayas (UPV)
UPV–DR serves as the institutional repository and digital archives that preserves and provides access to UPV's academic outputs. It aims to facilitate wider dissemination, increased societal use, and enhanced visibility of UPV faculty members, staff, and students’ researches, creative works, and innovations. It aims to promote UPV’s scholarly and artistic works, enhance collaborations between the academe and the industry, and amplify extension work and public service.
UPV–DR aims to preserve institutional records, permanent records, and university memories. It also aims to provide access to the intellectual outputs of UPV researchers, artists, and innovators, such as publications in journals, books, conference proceedings, theses and dissertations, and artistic works, among others. Access is generally unrestricted and is compliant with the Open Archives Initiative (OAI) protocol.
UPV–DR is managed by the UP Visayas University Library.
Collections in UPV-DR
Select a community to browse its collections.
Recent Submissions
Sediment organic matter, nitrogen, and phosphorus of four tivers in Miagao, Iloilo
Cahilig, Guen Gian D. (Department of Chemistry, College of Arts and Sciences, University of the Philippines Visayas, 2019-06)
The four rivers of Miagao are examples of aquatic areas where sediment pollution can be related and mostly caused by anthropogenic and non-point sources. The four rivers of Miagao, namely Bacauan, Naulid, Oyungan and Tumagbok rivers, were assessed and observed to have low levels of water due to the dry season, presence of water stagnation due to dikes; other factors such as discharges from domestic activities and livestock wastes, and thick vegetation are also present in the river. The relevance of this study is to provide baseline information about the levels of organic matter, NH4-N, and available phosphorus present in the river, provide public knowledge about the negative impacts of excessive levels of those parameters; and locate possible sources of the pollution through the values obtained.
For the total phosphorus concentration present in river sediments, the values are ranging from 0.0648 ppm to 0.154 ppm. Therefore, the values of the available phosphorus are harmful and can cause eutrophication to the river. However, for the values of organic matter and nitrogen, it was reported to be not harmful to the river but can still contribute to the excessive nutrient levels and eutrophication of the river.
Valuing the conservation of endangered species and their habitats in the Northwest Panay Peninsula Park: A preliminary study using contingent valuation method-(Personal Interview) of Kalibo Residents
Cahilig, Anahaw (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2007-03)
Northwest Panay Peninsula (NWPP) is one of the centers of endemism of the country. It is home to diverse species of flora and fauna including species endemic to Panay with status ranging from endangered to critically endangered and an extremely and highly- urgent site for conservation. A survey using Contingent Valuation Method (CVM) was done in selected barangays of Kalibo, Aklan to determine the willingness to pay of the residents to the conservation of the endangered species and their habitats in the NWPP. The results showed that the Kalibo-residents were unfamiliar with the existence of the NWPP and the endangered species it harbors. The study yields a mean WTP using the Survivor function Approach of the Kalibo respondents of Php 3.17. month or Php 38.04/ yearly. Despite the low awareness about the NWPP and the endangered species, the eight barangays included in this study would pay Php 283474.08 for its conservation and of all Kalibo residents (Social WTP) with 12,628 households, they would pay Php 480, 369.12 annually. With the high level of unawareness about NWPP, it is recommended by the researchers that more sources of information should be made available, not just to the Aklanons, but all throughout the country since this abundance in biodiversity are pride of the Filipino Nation.
Community structure of superfamily trochoidea (Mollusca Gastropoda) in coral reef sites in Taklong Island National Marine Reserve, Guimaras
Cagampang, Ma. Thrysky Kharmylle A. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)
Mollusks are considered to be one of the most diverse animal groups. These are widely distributed in tropical areas such as the Philippines. One of the most diverse classes of Phylum Mollusca is Class Gastropoda. It is comprised of more than 65, 000 species. Superfamily Trochoidea is considered to be its largest superfamily with more than 2000 species. Guimaras is a province here in the Philippines. There are a variety of islands that can be found in Guimaras. One of this is Taklong Island located in the municipality of Nueva Valencia. This study describes the community structure of Superfamily Trochoidea in three selected reef flat sampling sites namely, Talisay, Kalirohan, and Banago in Taklong Island National Marine Reserve (TINMR). Plot metlrod was used in this study. There was a total of 369 gastropod individuals collected but only 242 were alive. Live samples belonged to 12 families including 2 families of Super Family Trochoidea, namely, Trochidae and Turbinidae. There were 8 species identified that belonged to these 2 families of Superfamily Trochidea. Under family Trochidae, was 1 species, Tectus fenestratus; under family Turbinidae were three species, namely, Astralium calcar, Astralium provisorium and Turbo argyrostomus. Dead species of Family Trochidae include Trochus conus, Trochus hanleyanus, Trochus sp. and Trochus maculatus. In general, Astralium calcar was found to be the most abundant among all live species. The low diversity of trochoids reported in this study could be an underestimate due to sampling design. Most species of Superfamily Trochoidea, especially the topshells, are nocturnal while this study was conducted at daytime. In general, the gastropod community in TINMR proved to be rich and diverse.
Breaking news norms and formats: An analysis of Patrol ng Pilipino's integration of short form vertical videos in news content creation on Tiktok
Cagalawan, Mariane Gabrielle C.; Masigon, Neil Terrence S.; Pefianco, Marie Andrea (Division of Humanities, College of Arts and Sciences, University of the Philippines Visayas, 2024-05)
In response to the looming necessity to adapt to the changing media landscape. Patrol ng Pilipino emerged as one of the Philippines’ pioneering online media outlets consistently producing short-form vertical videos. Drawing from the principles of the Diffusion of Innovations (DOI) theory, this paper examines how Patrol ng Pilipino integrated short-form vertical videos into its news content creation on TikTok. Through a thematic analysis of semi-structured interviews with seven participants (two news authorities and five reporters) and Patrol ng Pilipino's five most-viewed TikTok videos (April 2023 - March 2024), this research found that Patrol ng Pilipino recognizes short-form vertical videos' adaptability to evolving news consumption habits and audience preferences. This highlights a distinct contrast to traditional media and underscores the need for a journalistic presence on TikTok. Additionally, the ABS-CBN franchise loss and traditional media consumption decline prompted the organization to integrate short-form vertical videos in news content creation. With this, Patrol ng Pilipino implemented a measured approach to establish a journalistic presence, prioritizing journalistic integrity while leveraging TikTok's affordances for audience engagement. The study also revealed advantages and disadvantages associated with integrating new media formats into journalistic practice, suggesting the dual nature of TikTok. Lastly, the findings highlight the complex opportunities short-form vertical video platforms present for news production. News organizations must adapt to this changing landscape, where news consumption habits increasingly favor digital formats. However, this adaptation necessitates a careful balancing act: journalists must uphold core journalistic ethics while embracing the demands of new platforms.
Toxicity of the aqueous leaf extract of datilis (Muntingia calabura) on the fry and fingerling of Oreochromis niloticus
Cagampang, Ma. Hazel C. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1994-08)
A 96-hour static bioassay on the effects datilis (Muntingia calabura) leaf extract on the fry and fingerlings of Oreochromis niloticus was conducted to determine the Average Median Lethal Concentration (LC50) of datilis (Muntingia calabura) leaf extract on the fry and fingerlings of Oreochromis niloticus and to describe the behavioral responses of the fish to the extract. The assay consisted of six treatments: 0, 12.5, 25, 50, 100, and 200 ppm concentrations of the extract. Physico-chemical conditions (e.g. temperature, pH, salinity, dissolved oxygen, ammonia, nitrite, and hardness level of water) were monitored. Results showed that the average LC50 at the 12, and 24- hour period of the extract in fingerlings (128.61 and 92.37 ppm) were significantly higher (P<0.05) than in the fry (65.45, and 60,99) respectively. Mortality was higher at higher concentrations than at lower concentrations of the extract. Highest mortality was in 200 ppm followed by 100 ppm, then 50 ppm. No death occurred in 0, 12.5 and 25 ppm concentrations of the extract. Mortality was also significantly higher (P<0.05) in fingerlings than in fry. The fish, exhibited avoidance - response reaction and loss of equilibrium. Possibly, the death and unusual behavior manifested by the fish may be due to saponins present in the extract. Physico—chemical conditions were within the tolerable range for the fish hence, these may not have contributed to the death of fish. This study provides preliminary data on the toxic effects of the aqueous leaf extract of datilis on the fry and fingerlings of ?Oreochromis niloticus.