Pusat Pengajian Sains Kajihayat - Tesis

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An Assessment Of The Terrestrial Large Mammals Population Abundance, Conservation Status And Challenges Of Management In A West African Protected Area
(2025-09)
Lawal, Mohammed Umar
The global decline of large mammals is widely acknowledged as a major threat to ecosystems worldwide. In West and Central Africa, terrestrial large mammals are particularly threatened by trade and consumption. However, quantitative and scientific information on the population status and conservation of terrestrial large mammals within protected areas in Nigeria is either scarce or extremely limited. This research seeks to help close that information gap. In this study, the abundance, conservation status, seasonal population distribution, and the influence of poaching and vegetation factors on terrestrial large mammals were assessed in Old Oyo National Park, Nigeria, in 2022.
Effects Of Irrigation And Fertilizer Application On Water And Fertilizer Use And Soil Environment In Greenhouse Tomato
(2025-08)
Lyu, Xiaona
Efficient water and fertilizer management is crucial for optimizing greenhouse tomato (Solanum lycopersicon L.) production while mitigating environmental impacts such as soil degradation, nutrient loss, and pollution. This study aims to: (1) study the effects of water and fertilizer application patterns on growth, physiology, water consumption, yield, fruit quality, soil nutrients and microbial environment; (2) evaluate the response of the nutrient absorption of various parts of greenhouse tomato under different application of water and fertilizer; (3) propose the optimal combination of irrigation volume and fertilizer application suitable for efficient and high-quality tomato production in greenhouses.
Systematics And Biogeography Of The Genus Chitala (Osteoglossomorpha: Notopteridae) In Malaysia Using An Integrative Approach
(2025-09)
Ruzman, Luqman Hakim
The taxonomy of the freshwater featherback fish genus Chitala (Osteoglossomorpha: Notopteridae) remains unsettled because delimiting and naming Chitala species based solely on morphology led to different hypotheses. In this study, the number and identity of Chitala species present in Peninsular Malaysia were determined by employing an integrative taxonomic approach that combines morphological characters and two mitochondrial markers: the cytochrome c oxidase subunit I (COI) and cytochrome b genes.
Influence Of Aqualase And Grobiotic@- A On Growth, Digestive Enzyme Activities, Survival And Streptococcus Faecium Resistance In Rainbow Trout (Oncorhynchus Mykiss) Juveniles
(2022-08)
Azari, Abdolhamid
The present study was carried out to investigate the effects of supplementation with a probiotic, aqualase (thepax©) and a prebiotic, grobiotic,li)- a, respectively, on rainbow trout oncorhynchus mykiss, growth and health performance, two series of experiments were conducted to evaluate the use of these supplements in a commercial trout feed (chine, iran) against fish pathogenic bacteria, streptococcusfaecium and their effects on growth performance, haematological, immunological parameters and specific enzyme activities of rainbow trout, o. Mykiss. In both experiments, blood was sampled for haematological and immunological parameters after 4, 8 and 12 weeks, respectively of feeding. At the end of the trials, gastrointestinal tract of experimental fish were removed to assay for digestive enzymes activity and determination of the total bacterial count in the intestines. In the first experiment, five diets were prepared each comprising of a control (not supplemented); 1 and 2% g-a respectively and 0.1 and 0.2% aqualase. The diets were fed twice daily to triplicate groups of 300 o. Mykiss fingerlings (average 11.30 ± 0.21g) in concrete tanks for 12 weeks. The growth performance and survival rate were significantly higher in fish maintained on the both g-a and aq treatments compared with the control. However, final weight and survival fish fed g-a2% was the highest among all the treatments tested. Haematological parameters showed no significant difference between treatments, whereas immunological parameters consisting igm (56.10 ± 3.44 mg/ml) and lysozyme (12.27 ± 0.97 mg/ml) were found significantly higher in the fish fed with supplemented g-a2% between groups
Environmental Dna (Edna) As A Tool For Monitoring Native Belida Species (Chitala Lopis) And Introduced Belida Species (Chitala Ornata) In Malaysian Freshwater Ecosystem
(2025-09)
Adnan, Muhamad Hanif Iryani
The use of environmental dna (edna) methods offers significant advantages in terms of cost, time and labour for monitoring rare and introduced species. However, most of the edna studies to date have been conducted in temperate environments, while edna-based applications for monitoring tropical organisms, particularly freshwater fishes remain limited and lack standardised procedures. In this study, qpcr-based edna methods were used to detect the presence of two freshwater fish species from the genus chitala (family notopteridae), locally known as ‘ikan belida’. Chitala lopis is native to peninsular malaysia but is rare, whereas chitala ornata has been introduced in this region and may represent a threat to local ecosystems. A species-specific pair of primers incorporated with a probe-based assay was designed to detect c. Lopis, whereas a pair of primers designed by osathanunkul & minamoto (2020) coupled with sybr green-based assay was used for detecting c. Ornata. A series of validation steps were included to test the specificity and sensitivity of each method. Environmental water samples were collected from the two rivers where either species was reported, namely the perak river for c. Lopis and the perai river for c. Ornata. The possible impacts of several environmental factors on edna detection were evaluated by recording environmental parameters at each sampling site. Overall, edna of each species was successfully detected at their respective locations, but not at all sampling sites.

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