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Differences in male:female ratio among species of the genus Carabus L. (Coleoptera: Carabidae) in south Sweden

The male: female (sex) ratio is of considerable importance in understanding population dynamics of species. A null hypothesis was tested that the male:female (sex) ratio of Carabus species does not differ measurably when entire seasons are considered, but may differ considerably over shorter periods, indicating differences in annual rhythms between the sexes. The sex ratios in nine Carabus species