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IRC-OUSL 2025
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03. BIOLOGICAL SCIENCES
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Browsing 03. BIOLOGICAL SCIENCES by Issue Date

Browsing 03. BIOLOGICAL SCIENCES by Issue Date

Now showing items 1-20 of 25

MORPHOLOGICAL AND MOLECULAR CHARACTERIZATION OF Citrus GERMPLASM IN SRI LANKA

Wickramaarachchi, W. A. N. R.; Rodrigo, W. W. P.; Weerakoon, S. R. (The Open University of Sri Lanka, 2025)

Sri Lanka has a rich variety of Citrus species, ranging from wild-growing limes in village backyards to cultivated hybrid mandarins and oranges in commercial plantations. Despite their economic and cultural importance, ...
PREVALENCE OF MACROLIDE RESISTANCE AMONG METHICILLIN-RESISTANT Staphylococcus aureus (MRSA): A META ANALYTIC ASSESSMENT

Senanayake, D. M. P. C.; Daulagala, P. W. H. K. P.; Rankothge, M. N.; Kumarasinghe, K. W. A. A. I. (The Open University of Sri Lanka, 2025)

Methicillin-resistant Staphylococcus aureus (MRSA) is a globally significant pathogen characterized by high virulence and exceptional adaptability. It shows resistance to multiple antibiotics, particularly β-lactams ...
SYNTHESIS OF ΑLPHA-PINENE HYDROPEROXIDES AND TOXICITY ASSESSMENT VIA ZEBRAFISH EMBRYO

Yasarathna, K. G. S. N.; de Silva, D. P. N.; Abeytunga, D. T. U. (The Open University of Sri Lanka, 2025)

Alpha-pinene is a naturally occurring monoterpene present in the essential oils of various plants. The oxidation of α-pinene with singlet oxygen [1O2(1Δg)] yields hydroperoxide and hydroxide derivatives that possess ...
COMPARATIVE ACTIVITY PATTERN ANALYSIS OF ENDEMIC CHEVROTAINS IN SRI LANKA

Tharinduni, W. A. L.; Hippala, H. M. U. K.; Gunathilaka, N. W. D. C. N.; Jayasekara, E. G. D. P.; Mahaulpatha, W. A. D. (The Open University of Sri Lanka, 2025)

Chevrotains are the most primitive ruminants, with few species surviving globally. Sri Lanka has two endemic species: Moschiola meminna in the dry zone and Moschiola kathygre in the wet zone. Data on their activity ...
HABITAT PREFERENCE OF THE SRI LANKAN SLOTH BEAR (Melursus ursinus inornatus) IN RAINY SEASON USING OCCUPANCY MODELING IN WILPATTU NATIONAL PARK, SRI LANKA

Hippala, H. M. U. K.; Tharinduni, W. A. L.; Anawarathna, M. A. D. C. K.; Jayasekara, E. G. D. P.; Mahaulpatha, W. A. D. (The Open University of Sri Lanka, 2025)

The study focused on the endangered Sri Lankan sloth bear (Melursus ursinus inornatus), assessing its habitat preferences through occupancy modeling to improve target conservation efforts in protected areas. The study ...
INFLUENCE OF DISTURBANCE REGIMES ON FIG-WASP RELATIONSHIPS AND SYCONIAL CHARACTERISTICS OF Ficus tinctoria (MORACEAE) IN SOME SELECTED SITES OF KANDY AND MATALE DISTRICTS

Wijesinghe, W. M. A. U.; Wijetunga, W. M. G. A. S. T. B. (The Open University of Sri Lanka, 2025)

The fig–fig wasp interaction is an obligate mutualistic relationship. Ficus tinctoria (Moraceae) is a hemi-epiphytic dioecious fig tree species. The present study investigated the influence of vegetation disturbance ...
EFFECT OF CLIMATIC CHANGES ON REPORTED DENGUE CASES IN SRI LANKA: A RETROSPECTIVE STUDY FROM YEAR 2020 TO 2024

Wanasinghe, W. M. R. S; Herath, H. M. J. P; Kiridana, A. H. K.; Perera, A. P. S.; Bandaranayaka, K. O. (The Open University of Sri Lanka, 2025)

Dengue fever remains a significant public health challenge in Sri Lanka, with rising incidence and expanding geographic distribution in recent years. This study investigates the spatial and temporal variations of dengue ...
INVESTIGATION OF THE ANTIOXIDATIVE AND SUN-PROTECTIVE PROPERTIES OF Aegle marmelos AND Cardiospermum halicacabum HERBAL EXTRACTS

Mandakini, A. A. D. M.; Dharmarathna, S. M. Y. P.; Fernando, B. A. K.; Nethmini, S. H. S.; Wasana, G. G. D.; Liyanagama, L. G. N. D.; Kumarasinghe, S. D. K.; Pemarathna, E. G. D. P. M.; Perera, G. D. M. V.; Senevirathne, S. M. A. P. (The Open University of Sri Lanka, 2025)

Medicinal plants are rich natural sources of bioactive phytochemicals and are widely used in the cosmetic industry due to their compatibility in types, with fewer side effects. Therefore, it is essential to assess their ...
INTRASPECIFIC VARIATION IN SCHNEIDER’S LEAF-NOSED BAT (Hipposideros speoris) ACROSS THREE ECOLOGICALLY DISTINCT ROOSTS IN SRI LANKA

Samarakoon, S. M. P. S.; Fernando, T. S. P.; Wijesinghe, M. R. (The Open University of Sri Lanka, 2025)

Hipposideros speoris occurring across all bioclimatic zones is one of the most widespread bat species in Sri Lanka. This study focused on ecological traits and body morphometrics of three colonies of H. speoris from ...
HYDROGEN PEROXIDE-MEDIATED MODULATION OF GERMINATION RATE AND SEEDLING VIGOR IN Psophocarpus tetragonolobus (L.) DC.

Kumarasinghe, K. W. A. A. I.; Rankothge, M. N.; Senanayake, D. M. P. C.; Daulagala, P. W. H. K. P. (The Open University of Sri Lanka, 2025)

Winged bean (Psophocarpus tetragonolobus (L.) DC.), a tropical legume rich in protein, micronutrients, and antioxidants, holds significant potential for food security and sustainable agriculture due to its nutritional ...
MICROPLASTIC CONTAMINATION IN SELECTED SHRIMP FARMS AND ADJACENT WATER BODIES IN PUTTALAM DISTRICT, SRI LANKA

Basnayake, B. M. K. G.; Dahanayake, D. D. G. L. (The Open University of Sri Lanka, 2025)

Microplastics (MPs) have emerged as a widespread environmental pollutant, posing significant threats to aquatic ecosystems and human health. This study investigated the prevalence, distribution, and characteristics of ...
THE EFFECT OF SUGAR AND GINGER EXTRACTS AS FLORAL PRESERVATIVES TO INCREASE THE VASE LIFE OF CHRYSANTHEMUMS

Kumarasinghe, N. G. S. D.; Dhananjani, H. G. I.; Weerasooriya, S. W. J. D.; Dayananda, P. G. P. M.; Palleweediya, P. D. U.; Wijenayake, M. S. H.; Somarathna, U. G. I. N.; Weerasinghe, W. G. L. N.; Dharmarathna, S. M. Y. P; Senadheera, P. (The Open University of Sri Lanka, 2025)

Cut flowers play an important role in the commercial floriculture industry and bring export earnings that highly contribute to the economy of the country. Their vase life and longevity depend on the flower variety and ...
COMMUNITY KNOWLEDGE, ATTITUDES, AND PRACTICES ON SEA TURTLE CONSERVATION IN MADIHA AND POLHENA, SRI LANKA

Abeywickrama, Hasali; Nilakarawasam, Nayana; Rodrigo, Wasana (The Open University of Sri Lanka, 2025)

The global sea turtle population is threatened due to anthropogenic activities. The coastline of Sri Lanka, including Madiha and Polhena beaches, provides critical habitats for five species of sea turtles. Their ...
SUBMERGENCE TOLERANCE IN SELECTED RICE VARIETIES OF SRI LANKA: AN EVALUATION OF Oryza sativa L. ACROSS DIVERSE WATER SOURCES

Lahiru, P. G. P.; Jayarangana, K. G. C.; Suraweera, A. G. C. G.; Dulara, T. P. E.; Dahanayake, I. S.; Kavindi, C. A. C; Sathsarani, R. V. M.; Maleesha, K. G. S.; Madushani, H. H.; Dulmini Dvinitha, N. V.; Nimashi Madhubhashini, A. B.; Gunawardana, D. D. D. D. (The Open University of Sri Lanka, 2025)

Submergence poses a major challenge to rice cultivation, significantly reducing harvest outcomes. Therefore, the adoption of rice varieties with enhanced tolerance to submergence is crucial. This study examines how ...
ECTOPARASITES OF CHIROPTERAN SPECIES IN THE MANNAR ISLAND AND POONERYN REGION OF SRI LANKA

Gunawansa, P.; Fernando, V. A. K.; Fernando, T. S. P.; Wijesinghe, M. R.; Weerakoon, D. K. (The Open University of Sri Lanka, 2025)

Bats are hosts to a variety of ectoparasites, which may impact their health and the transmission of zoonotic pathogens. However, studies on bat parasites in Sri Lanka are very limited and are mainly restricted to the ...
BIODEGRADATION OF RHODAMINE-B TEXTILE DYE USING CYANOBACTERIA UNDER OLIGOTROPHIC CONDITIONS

Kumari, R. M. C. P.; Udalagama, S. W. M. R. M. P. R.; Weeraarachchi, W. A. Y. B. S.; Wijerathne, K. M. S. D.; Bandara, S. M. D. C.; Ratnayake, R. R. (The Open University of Sri Lanka, 2025)

The persistence and resistance of Rhodamine-B and other analogous synthetic dyes in aquatic ecosystems are a cause of serious environmental and public health concern. Their persistence against degradation by conventional ...
LOW-COST MULTI-SENSOR PLATFORM FOR MONITORING INSECT BEHAVIORAL RESPONSES TO ENVIRONMENTAL CHANGE: A CASE STUDY IN ANTS

Bamunusingha, Y. D.; Bandaranayaka, K. O.; Illeperuma, G. D. (The Open University of Sri Lanka, 2025)

Insect foraging behaviour is influenced by various environmental factors; however, continuous monitoring under natural conditions remains technically and financially challenging. In this study, we present a cost-effective, ...
ASSESING DEGRADATION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHs) IN FRONT OF TIN (Sn) STRESS BY A SOIL BACTERIAL CONSORTIUM

Fernando, R. N. A.; Vidarshana, K. K. D. H.; Sajida, F.; Ilma, M. I. F.; Hasna, M. H.; Madanayake, K.; Dharmasiri, N. (The Open University of Sri Lanka, 2025)

Polycyclic Aromatic Hydrocarbons (PAHs) are persistent in the environment and are toxic pollutants which have carcinogenic and mutagenic properties. They are composed of two or more fused benzene rings. Bacteria present ...
PRELIMINARY GENETIC CHARACTERIZATION OF SELECTED MANGROVE SPECIES IN SRI LANKA

Sahan Bimsara, R. K.; Weerakoon, S. R.; Roshan S. Perera, K. A. (The Open University of Sri Lanka, 2025)

Mangroves are woody plants that thrive at the interface of land and sea, inhabiting harsh environmental conditions such as high temperature, strong wind, high salinity, extreme tide, and anaerobic muddy conditions. ...
DEVELOPMENT OF LARVAL STAGES OF Aedes aegypti IN POLLUTED WATER HABITATS IN COLOMBO DISTRICT AND THEIR SUSCEPTIBILITY TO TEMEPHOS INSECTICIDE

Liyanagedara, Nimasha (The Open University of Sri Lanka, 2025)

Dengue fever, primarily transmitted by Aedes aegypti and Aedes albopictus, affects approximately 400 million people worldwide annually. In Sri Lanka, recurring outbreaks have occurred since the 1960s, with severe ...

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