Senescing sexual ornaments recover after a sabbatical
نویسندگان
چکیده
منابع مشابه
Senescing sexual ornaments recover after a sabbatical.
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-...
متن کاملChapter 10 --sexual Ornaments and Mate Choice Mate Choice and Sexual Ornaments
Get out of your chair and go look at some animals behaving. I hope that spring is in the air so that you can see animals courting and mating. Look at insects, birds, mammals, or reptiles. Go to the beach and look at the fiddler crabs. So sad if the dead of winter has set in and animals aren’t engaged in mating rituals. Look at fish in an aquarium. Go to a tropical fish store and look at a tank ...
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Ornamental traits function by improving attractiveness and are generally presumed to experience directional selection for mating success. However, given the greater investment of females in offspring than males, female-specific ornaments can in theory signal fecundity yet be constrained by fecundity costs. Theoretical work predicts that such constraints can lead to stabilizing selection via mal...
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Sexual ornaments are favoured to be both less integrated with other organismal traits for greater expression, and yet more integrated with organismal development and functions to better indicate the physiological quality of an organism. Two conceptual approaches in morphological evolution – the consideration of internal and external processes and the evolution of integration and modularity – ar...
متن کاملThe Handicap Process Favors Exaggerated, Rather than Reduced, Sexual Ornaments
Why are traits that function as secondary sexual ornaments generally exaggerated in size compared to the naturally selected optimum, and not reduced? Because they deviate from the naturally selected optimum, traits that are reduced in size will handicap their bearer, and could thus provide an honest signal of quality to a potential mate. Thus if secondary sexual ornaments evolve via the handica...
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ژورنال
عنوان ژورنال: Biology Letters
سال: 2009
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2009.0759