Risk assessment of parasitic helminths on cultured Nile tilapia (Oreochromis niloticus, L.)

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dc.contributor.authorAkoll, Peter
dc.contributor.authorKonecny, Robert
dc.contributor.authorMwanja, Wilson W.
dc.contributor.authorSchiemer, Fritz
dc.date.accessioned2022-12-27T18:49:18Z
dc.date.available2022-12-27T18:49:18Z
dc.date.issued2012
dc.description.abstractDisease outbreaks constrain aquaculture development. Knowledge on the potential risks of pathogens to farmed fish can help in designing management strategies for increased aquaculture productivity and sustainability. This study compares the helminth infections in reservoirs and therein operated cages as well as earthen fish ponds and the feeding stream in order to assess the significance of life cycle style and water sources in parasite transmission. In addition field experiments were setup to determine loading time and transmission rate. From 650 fish examined, 8 helminth species were recorded (3 from caged- and all 8 from pond-raised fish). The parasite community was dominated by trophically-transmitted species in both culture systems indicating the importance of trophic pathway in helminth transmission. The occurrence of trophically-transmitted helminths in caged-fish was positively related to their prevalence in reservoir-dwelling hosts indicating the importance of water supply in spread of helminths. The prevalence in pond-raised fish was higher than in stream-dwelling ones suggesting the presence of local sources of infective stages within ponds. Risk assessment revealed that monogeneans are high-risk parasites while heteroxenous helminths pose low to negligible threats to farmed fish. Although, cages appeared safer to heteroxenous parasites than ponds, their location in the water body, especially the distance from shores and depth is critical.en_US
dc.identifier.citationAkoll, P., Konecny, R., Mwanja, W. W., & Schiemer, F. (2012). Risk assessment of parasitic helminths on cultured Nile tilapia (Oreochromis niloticus, L.). Aquaculture, 356, 123-127. doi:10.1016/j.aquaculture.2012.05.027en_US
dc.identifier.other10.1016/j.aquaculture.2012.05.027
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/6664
dc.language.isoenen_US
dc.publisherAquacultureen_US
dc.subjectAquacultureen_US
dc.subjectAquatic ecologyen_US
dc.subjectCage-culturingen_US
dc.subjectFish pondsen_US
dc.subjectFreshwater fisheriesen_US
dc.subjectRisk analysisen_US
dc.titleRisk assessment of parasitic helminths on cultured Nile tilapia (Oreochromis niloticus, L.)en_US
dc.typeArticleen_US
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