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  • Title: Food selection behaviour of potential biological agents to control intermediate host snails of schistosomiasis: Sargochromis codringtoni and Tilapia rendalli.
    Author: Chimbari MJ, Ndamba J, Madsen H.
    Journal: Acta Trop; 1996 May; 61(3):191-9. PubMed ID: 8790770.
    Abstract:
    The food selection behaviour of two fish species indigenous to Zimbabwe (Tilapia rendalli and Sargochromis codringtoni) was studied under laboratory conditions with a view to considering them as biological agents for snail control. Six glass aquaria were set up and divided into two sets each with two aquaria. One S. codringtoni was introduced into each aquarium of the first set while one T. rendalli was introduced into each aquarium of the other set. In one of the aquaria of each set the fish were supplied with snails and trout food. Snails and weeds were provided, but trout food was excluded in the second aquarium of each set while the third aquarium for each set was provided with trout food, snails and weeds. A fourth aquarium with weeds and snails but no fish was set up as a control. Data collected over 9 weeks showed that T. rendalli was primarily herbivorous while S. codringtoni was shown to be malacophagous. Presence of trout food made no difference in the snail-eating habit of S. codringtoni or the weed-eating behaviour of T. rendalli. However, trout food seemed to be a good protein supplement to T. rendalli as the fish with access to trout food gained more weight and length.
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