Trends in Sex Ratios of the Reproductive Broods of Formica obscuripes (Hymenoptera: Formicidae)

Publisher Website
Google Scholar
Abstract
Although other workers have reported that the proportion of males released during the reproductive flights of Formica species declines with time, the activity of sexuals in Illinois colonies of the western thatching ant suggests that this pattern is not generally true. Some nests produced all males, some all females, and others a mixture of the sexes. Of this last group, in only 1 of 5 nests in 1976 and 2 of 5 in 1977 did the proportion of males decrease with time. The nongenerality of this trend is consistent with the hypothesis that sex ratios in these colonies are not in evolutionary equilibrium.

This publication has 2 references indexed in Scilit: