horizontal transmission of an isolate of the etomopathogenic fungus, beauveria bassiana kcf102, was examined by allowing inoculated eurygaster integriceps put. adults to mate with non-inoculated ones. in case of susceptibility to b. bassiana, there was no significant difference between the males and females. however, there was significant difference among treatments for mortality of non-inocula...

If mating with an inferior male has high fitness costs, females may try to avoid mating with these males. Alternatively, females may accept an inferior male to ensure they have obtained at least one mate, and/or to avoid the costs of resisting these males. We hypothesized that females compensate for mating with an inferior male by remating. We tested this hypothesis by measuring remating propen...

Recent work has called into question the reality of the rare male mating advantage, pointing out that it could be a statistical artifact of marking flies for behavioral observation or of experimental bias in collecting males. We designed an experiment to test for rare male mating advantage that avoids these sources of bias. Large numbers of males of three Drosophila pseudoobscura karyotypes wer...

Rearing environment can have an impact on adult behavior, but it is less clear how rearing environment influences adult behavior plasticity. Here we explore the effect of rearing temperature on adult mating behavior plasticity in the butterfly Bicyclus anynana, a species that has evolved two seasonal forms in response to seasonal changes in temperature. These seasonal forms differ in both morph...

The adaptive significance of learning is supported by studies showing its positive effects on mating behaviour, but they rarely go beyond fertilization success. Here we studied how learning contributes to qualitative reproductive investment, by testing the hypothesis that mating in the context that predicts male appearance has positive effects on female reproductive investment compared with uns...

Although multiple lines of evidence suggest that early adult life is very important in shaping the reproductive behavior of males, few studies have looked at the fitness consequences of the variation in reproductive behavior induced by differences in early life experience of males. Using a long term laboratory adapted population of Drosophila melanogaster Meigen (Diptera: Drosophilidae), early ...

the group size and behavior of goitered gazelle was studied over the year 2001 in kalmand-bahadoran protected area. gazelle groups showed no stable organization in kalmand protected area. in spring season, group size was smaller than other seasons and the largest groups were seen in winter. number of solitary gazelles increased during the mating season. adult males were territorial in mating se...