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• W2280647529 abstract "In many parts of the world, wild stocks of fish are dwindling especially in Africa where drought, pollution and over-exploitation are some of the causative factors. The continent is not spared other climatic catastrophies such as global warning with its effects on the flora and fauna (both terrestrial and aquatic). This may lead to the manifestation of diseases caused by parasitic organisms, which have been known to co-exist with their hosts. The work reported here attempted to highlight the importance of studying the ecological relationship between parasites and their hosts in their wild environments i.e. the microhabitats (fish) and the macrohabitat (the lake). This work aimed at determing the distribution of four teleostean fishes Oreochromis leucostictus (Trewavas), Micropterus salmoides (Lacepede). Tilapia zillii (Gervais) and Barbus amphigrama (Boulenger) as hosts of the parasites, to establish the occurrence and prevalence of helminth parasites in each of the four species and to determine and quantify the relationships between the helminth parasites and the teleostean hosts. The distribution of the four fish species as hosts of the helminth parasites was studied for a period of two years. The occurrence of the helminth parasites, intensity of infection in each species, prevalence of each parasite on each host, differential establishment, seasonal variation in prevalence and intensity of infection and the effects of these parasites on their hosts were determined. The effect of water chemistry on the intensity of infection was established by comparing the main Lake Naivasha which is fresh and the more saline Oloidien Bay. Statistical tests used to establish the relationship between the parasites and their hosts were the chi-square, analysis of variance, split-plot technique and regression analysis. The results showed a significant variation in the monthly distribution of the fish species within the lake (F11,32=4.07, P 0.05). Host specificity was also revealed among the parasites with two parasites Clinostomum and Amirthalingamia being very specific on O. leucostictus and T. zillii respectively (F15,2860=21.63; P 0.05), the intensity of infection of O. leucostictus with P. kenyensis increased with age (t4=7.061; P>0.01). These parasites showed no harmful effects no harmful effects on their host from the observation of the relationship between intensity with Contracaecum and the condition factor of the fish (F3,33=0.02; P>0.05). In conclusion, Lake Naivasha fish species do not harbour any ectoparasites but they are infected by larval stages of four endoparasites." @default.
• W2280647529 created "2016-06-24" @default.
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• W2280647529 date "2012-01-01" @default.
• W2280647529 modified "2023-09-26" @default.
• W2280647529 title "Ecological studies of Fish parasites in Lake Naivasha" @default.
• W2280647529 hasPublicationYear "2012" @default.
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