Comparações estatísticas entre as 6 espécies mostraram diferenças significativas em relação aos 3 parâmetros analisados. rosinae, e três populações de diferentes origens geográficas da espécie D. Additional studies of the courtship song of other species of the fasciola subgroup, as well as for other subgroups of the repleta group, and studies, using molecular makers, that focus on the genetic basis of the differences among these species in courtship song would allow us to evaluate the association of courtship song and sexual isolation in these species, and would also help us to understand the evolution of these behavioural differences.ĭrosophila fasciola subgroup courtship song evolution behaviorĬom o objetivo inicial de caracterizar o padrão sonoro da corte sexual de machos de diferentes espécies do subgrupo fasciola e determinar a possível ocorrência de variação e o grau de diferenciação tanto inter como intraespecífico, foram analisados os parâmetros intervalo intrapulso (PI), intervalo interpulso (IPI) e freqüência intrapulso (IF) de 6 diferentes espécies: D. Low variability among populations within the same species was already observed for other subgroups and could be explained by the following hypotheses: strong selection acting on the song parameters, gene flow, or recent colonization from a common source. The PI was the only parameter that was significantly different among the three population of D.
sympatric effects on song evolution and 4. different selection pressures with absence of flow gene 2.
Four different hypotheses could explain this variation: 1. The IPI was the most variable parameter among these species, suggesting that this parameter is important for female discrimination. There were significant differences among the six species for these three courtship song parameters. The parameters analyzed were intrapulse interval (PI), interpulse interval (IPI), and intrapulse frequency (IF). The aim of this work was to characterize the male courtship song pattern of various species of the fasciola subgroup and to determine the level of variation both within and among species.
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