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Studies on the intraspecific competition in dung breeding flies 2. some biological phenomena induced by overcrowding in immature stages of musca hervei diptera muscidae

, : Studies on the intraspecific competition in dung breeding flies 2. some biological phenomena induced by overcrowding in immature stages of musca hervei diptera muscidae. Medical Entomology and Zoology 35(4): 333-342

Laboratory studies were done to assess the effects of laraval density within cow dung on the growth and development of M. hervei. Villeneuve. Various numbers of eggs were reared with a fixed amount of reconstructed cow dung. In general, high larval densities beyond a certain level caused a large decrease in sizes of subsequent pupae and adults, despite the fact that the ratio of pupal length to width was almost constant for all sexes. Very small puparia, however, were thin-walled and fragile. These stunted pupae had a tendency to emerge into small adults, having corresponding size in hands and wings with the pupal size, in a shorter period than normal ones. There seemed to be a positive relationship between the pupal size and the survival period of subsequent adult flies in both sexes.


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