Preference and choice for a mate with similar heterozygosity levels increases reproductive success

Lies Zandberg (Speaker)

Activity: Talk or presentationPublic lecture/debate/seminar

Description

NVG Presentation Price 2016 In mate choice research population wide preferences for traits that indicate quality are often assumed. However an increasing number of studies indicate that individuals may differ in their preference for a mate. In particular for genetic traits it is expected that individuals might choose a complementary mate rather than one that is universally attractive. In this study we uniquely combined mate preference tests with a field experiment to study the fitness benefits of the measured preferences. We tested 139 wild great tits (Parus major) for their preferences in a six-choice test setup. Both males and females showed an assortative preference for heterozygosity. Moreover, in the subsequent field study, foster pairs with similar heterozygosity levels raised more chicks to fledge than dissimilar foster pairs. Thus by choosing for a partner with similar heterozygosity levels, rather than the absolute level of heterozygosity, individuals gained direct benefits. With these results we’ve shown that individuals differ in their mate preferences depending on their own traits and that finding a compatible mate can increase reproductive success.
Period1 Dec 2016
Event title24th Annual Meeting of the Netherlands Society for Behavioural Biology (NVG), Soesterberg, The Netherlands
Event typeConference
Conference number24
LocationSoesterberg, Netherlands