00000ctm a22000003a 4500 UP-8027390931313988990 Buklod 20171005104738.0 m |o d | ta 171005s xx d r |||| u| (iLib)UPVIS-00049674086 Gift VML/nllb/10/05/2017 eng LG 993.5 2017 F5 T36 Tandayag, Hanna Beth Butiong Evaluation of the inhibitory effect of probiotics and a microalgae against vibrio sp. in aquaculture wastewater by Hanna Beth Butiong Tandayag. 2017. ix, 41 leaves. text rdacontent unmediated rdamedia volume rdacarrier Thesis (Bachelor of Science in Fisheries) Institute of Aquaculture, College of Fisheries and Ocean Sciences, University of the Philippines Visayas. Due to intensified aquaculture activities, large amount of residues are produced in aquaculture that leads to deterioration of water quality and outbreaks of diseases such as vibriosis. Thus, there is an increasing demand for environment friendly aquaculture practices, and the use of probiotics and microalgae is recommended for sustainable aquaculture practices. A microcosm experiment was conducted to test the inhibitory effect of commercial probiotics, probiotic isolate (Pseudomonas sp.) and microalgae (Tetraselmis sp.) against Vibrio sp. In aquaculture wastewater at 0hr (initial). 2hr and 3hr sampling period. The experiment consisted of four treatments: (i) control (wastewater only); (ii) wastewater and commercial probiotics, (iii) wastewater and probiotic isolate, and (iv) wastewater and microalgae. All treatments were replicated. The results indicated that the probiotic isolate was most efficient in eliminating the population of pathogenic Vibrio species, with a percent pathogenic Vibrio count from 31.9% in the initial sampling (0hr) to 0 count in the 2nd and 3rd hr of sampling. Moerover, it has inhibitory effect on the total Vibrio bacteria in the wastewater, wherein continuous significant (p<0.05) decrease in the total Vibrio sp. Population was observed with probiotic isolate. Also, commercial probiotic and microalgae (Tetraselmis sp.) were effective in inhibiting the growth of pathogenic Vibrio species. This indicates that beneficial bacteria and microalgae can contribute in establishing basic mitigating solutions to the problems concerning wastewater and providing baseline sinformation in the control of pathogenic outbreaks in aquaculture. Probiotics. Microalgae. Vibrio. Pathogens. Aquaculture wastewater. Pedroso, Fiona L., Ph.D. Thesis Adviser. FI UPVIS UPV-CFOS LG 993.5 2017 F5 T36 Thesis