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VERSION:2.0
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BEGIN:VEVENT
DTSTAMP:20240329T022922Z
UID:https://www.bi.mpg.de/events/26444/2855
DTSTART:20201217T120000Z
DTEND:20201217T130000Z
CLASS:PUBLIC
CREATED:20201105T121626Z
DESCRIPTION:In evolutionary ecology\, the process of mate sampling is often
considered as a secondary problem compared to the more important question
of co-evolution between the traits expressed in one sex and the preferenc
es in the other sex. Since there are direct benefits from choosing a partn
er\, the processes of pair formation have been overlooked as a somewhat tr
ivial question. Yet\, the question of the choice between several partners
of varying quality is not as simple and immediate as it may seem at first
look. Difficulties arise at several levels. The study of mating strategies
often begins with field observations at the group or population level\, b
ut it is not straightforward to identify the actual choice criterion. If n
on-random pairing is observed\, many authors are tempted to conclude to th
e existence of an underlying sexual preference. Yet\, one cannot directly
link the pattern of assortative mating at the population level to a given
process of individual choice. Indeed\, simple models show that one can eas
ily generate such a pattern without assuming any sexual preference for the
individuals. On the contrary\, a pattern apparently resulting from random
choices can be generated from assumptions in which the individuals actual
ly rely on explicit sexual preferences. More generally\, the scramble comp
etition (always arising when there is a limited number of sexual partners)
is a sufficiently strong constraint to severely impair the evolution of a
ny choosy decision rules. In most cases\, the evolutionary stable strategy
is to use very low acceptance threshold. We also provide experimental mec
hanisms in favour of the adaptive value of this apparent absence of choice
. These results emphasize the urgent need for carefully considering the pa
iring process in sexual selection.\nVortragende(r): François-Xavier Decha
ume-Moncharmont
LAST-MODIFIED:20201123T121242Z
LOCATION:Seewiesen\, Raum: Online
ORGANIZER:Prof. Dr. Bart Kempenaers
SUMMARY:Talk François-Xavier Dechaume-Moncharmont: François-Xavier Dec
haume-Moncharmont\, Université Claude-Bernard Lyon 1\, Lyon\, Fran
ce: The difficulty in life is the choice
URL:https://www.bi.mpg.de/events/26444/2855
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