Abstract
Food preference of M. leuckarti was experimentally analysed in relation to different species of live and dead crustaceans. Also their possibility of using detritus from bottom sediments as a source of food was tested. It has been found that M. leuckarti readily feed on dead organisms, and detritus from bottom sediments is sufficient for their survival. On the basis of experimental results the feeding strategy of M. leuckarti in lakes is discussed. It seems that the availability of different species of live prey depends on the mode of their swimming and on their body cover, while the availability of dead prey depends only on the body cover. Detritus may be an important source of food, particularly when the live prey are scarce in the pelagic zone, or not easily available.
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