A study was made of the spatial pattern of the progeny produced in boxes with 25 oviposition tubes, by groups of six Drosophila melanogaster females during 24, 72 and 216 h. Each female was fertilized by a male carrier of a dominant mutation in such a manner that the behavior of each female of the group as well as that of each group could be determined by a study of their progeny. The pattern of spatial distribution of the progeny was aggregated, reaching its highest value at 72 h. Gregarious behavior of individuals was defined by the number of sites among which they disseminated their progeny in a 24 h-cycle; while for groups it was estimated by the variance/mean ratio. The fertility, egg-adult development time and mortality rate were recorded. Comparisons between the tubes showed statistically significant differences in the number of individuals and of phenotypical composition. These gregarious distributions could contribute to local genetic differentiation.
O padrão espacial da prole produzida em caixas com 25 tubos de desova por grupo de 6 fêmeas de Drosophila melanogaster durante 24, 72 e 216 h foi estudado. Cada fêmea foi fertilizada por um macho portador de uma mutação dominante, de tal forma que o comportamento de cada fêmea do grupo, assim como o comportamento de cada grupo, puderam ser tratados pelo acompanhamento de sua prole. O padrão de distribuição espacial da prole foi agregado, alcançando seu valor máximo em 72 h. Em indivíduos gregários, o comportamento foi definido pelo número de locais nos quais eles disseminaram sua prole em ciclos de 24 h, enquanto que, para grupos, foi estimado pela taxa média de variância. A fertilidade, o tempo de desenvolvimento ovo-adulto e a taxa de mortalidade foram registrados. As comparações entre os tubos mostraram diferenças estatisticamente significantes no número de indivíduos e de composição fenotípica com distribuições gregárias que poderiam contribuir para a diferenciação genética local
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