Sex ratio variation in the dioecious shrub Oemleria cerasiformis
Article Abstract:
A study of sex ratio variation in 60 natural populations of the North American dioecious shrub Oemleria cerasiformis is reported. The study revealed that there was an excess of males in 56 of the 60 populations. genet ratio in young plants was 1:1, but was male-biased in mature plants due to differential mortality. Examination of dead genets confirmed that the greater mortality of females was the main cause of male-biased sex ratio in O. cerasiformis.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1993
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Intracolonial sex ratio variation with and without local mate competition in an ant
Article Abstract:
The highly female-biased investment ratio among wingless ant sexuals of Technomyrmex albipes is due to the restricted mating pool or local mate competition. Technomyrmex albipes have two distinct sex ratios in the same in the same population and colony. These unique differences result from the differences in dispersal tactics and the mating structure of alate and wingless reproductive ants.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1996
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