Evaluation of food quality in biological parameters of Drosophila melanogaster (Diptera: Drosophilidae): comparison between a laboratory population and a wild population
DOI:
https://doi.org/10.13102/scb8102Abstract
Feeding has influence on behavior and biological parameters of any kinds of animal species. In insects, it is necessary the use of laboratory-reared populations for the study of these aspects. Drosophila melanogaster Meigen, 1830 is the best organism to be used in laboratory experiments for these studies. Although the rearing species are widely utilized, the laboratory-reared populations can be a problem for evolution, life-history and behavior studies and also for preservation and biological control programs. Literature data shows that artificial rearing causes modifications in behavior s well as in physiologic and demographic traits of the populations when they are established in laboratory. The aim of this study was to compare the influence of the food quality, estimated by protein concentration of the diet, on immature performance and adult longevity of two D. melanogaster populations: one laboratory-reared and other originally from the field. The results showed that for basic biological aspects, such as, protein requirement in the immature and adult phase, the two populations had similar results. In both populations, the ingestion of the greatest protein concentration on immature phase results, generally, in better immature performance and larger adult longevity. Some differences have been registered between these two populations. Adult emergence was greater in laboratory population and the smaller ingestion of protein in immature phase reduced the adult longevity of laboratory males, but it did not affect the longevity of field males.
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