Abstract:
:Somatic deterioration in ageing animals may arise from allocation of resources to reproduction at the expense of repair and maintenance. Thus, accumulated reproductive effort is likely to progressively limit the expression of sexual ornaments at older ages. We analysed the effect of age and reproductive effort on the sexual attractiveness (foot colour) of male blue-footed boobies. Using a long-term dataset, we found that, as animals age and accumulate reproductive events, the expression of foot colour deteriorates. In addition, after non-breeding events males displayed more colourful feet compared with males that reproduced the year before, suggesting that sabbatical years facilitate recovery. Our results indirectly support the idea that allocation of resources to reproduction limits sexual attractiveness and that animals could cope with the negative effects of senescence on sexual ornaments by skipping some breeding events.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Velando A,Drummond H,Torres Rdoi
10.1098/rsbl.2009.0759subject
Has Abstractpub_date
2010-04-23 00:00:00pages
194-6issue
2eissn
1744-9561issn
1744-957Xpii
rsbl.2009.0759journal_volume
6pub_type
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