Evolution of sex-specific pace-of-life syndromes: causes and consequences

Hämäläinen, Anni, Immonen, Elina, Tarka, Maja and Schuett, Wiebke (2018) Evolution of sex-specific pace-of-life syndromes: causes and consequences. Behavioral Ecology and Sociobiology, 72. p. 50. ISSN 0340-5443

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Males and females commonly differ in their life history optima and, consequently, in the optimal expression of life history, behavioral and physiological traits involved in pace-of-life syndromes (POLS). Sex differences in mean trait expression typically result if males and females exhibit different fitness optima along the same pace-of-life continuum, but the syndrome structure may also differ for the sexes. Due to sex-specific selective pressures imposed by reproductive roles and breeding strategies, the sexes may come to differ in the strength of correlation among traits, or different traits may covary in males and females. Ignorance of these selective forces operating between and within the sexes may lead to flawed conclusions about POLS manifestation in the species, and stand in the way of understanding the evolution, maintenance, and variability of POLS. We outline ways in which natural and sexual selection influence sex-specific trait evolution, and describe potential ultimate mechanisms underlying sex-specific POLS. We make predictions on how reproductive roles and the underlying sexual conflict lead to sex-specific trait covariances. These predictions lead us to conclude that sexual dimorphism in POLS is expected to be highly prevalent, allow us to assess possible consequences for POLS evolution, and provide guidelines for future studies.

Item Type: Article
Additional Information: Part of the following topical collections: Pace-of-life syndromes: a framework for the adaptive integration of behaviour, physiology and life-history https://link.springer.com/journal/265/topicalCollection/AC_1599d894aa8e86f8ab8f4a8716a41230
Schools and Departments: School of Life Sciences > Evolution, Behaviour and Environment
Subjects: Q Science > QL Zoology > QL0750 Animal behaviour
Depositing User: Wiebke Schuett
Date Deposited: 28 Aug 2018 14:58
Last Modified: 28 Aug 2018 14:58
URI: http://sro.sussex.ac.uk/id/eprint/78332
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