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No evidence for offspring sex-ratio adjustment to social or environmental conditions in cooperatively breeding purple-crowned fairy-wrens

Kingma, Sjouke A.; Hall, Michelle; Peters, Anne-Marie


When fitness returns or production costs vary between male and female offspring, selection is expected to favor females that adjust offspring sex ratio accordingly. However, to what extent vertebrates can do so is the subject of ongoing debate. Here, we explore primary sex ratios in 125 broods of cooperatively breeding purple-crowned fairy-wrens Malurus coronatus. We expected that females might adjust offspring sex ratio because this passerine species experiences considerable variation in...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Behavioral Ecology and Sociobiology
DOI: 10.1007/s00265-010-1133-7


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