Intralocus sexual conflict and offspring sex ratio.

Abstract:

:Males and females frequently have different fitness optima for shared traits, and as a result, genotypes that are high fitness as males are low fitness as females, and vice versa. When this occurs, biasing of offspring sex-ratio to reduce the production of the lower-fitness sex would be advantageous, so that for example, broods produced by high-fitness females should contain fewer sons. We tested for offspring sex-ratio biasing consistent with these predictions in broad-horned flour beetles. We found that in both wild-type beetles and populations subject to artificial selection for high- and low-fitness males, offspring sex ratios were biased in the predicted direction: low-fitness females produced an excess of sons, whereas high-fitness females produced an excess of daughters. Thus, these beetles are able to adaptively bias sex ratio and recoup indirect fitness benefits of mate choice.

journal_name

Ecol Lett

journal_title

Ecology letters

authors

Katsuki M,Harano T,Miyatake T,Okada K,Hosken DJ

doi

10.1111/j.1461-0248.2011.01725.x

subject

Has Abstract

pub_date

2012-03-01 00:00:00

pages

193-7

issue

3

eissn

1461-023X

issn

1461-0248

journal_volume

15

pub_type

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