Abstract:
:Female insects that mate multiply tend to have increased lifetime fitness, apparently because of greater access to male-derived resources (e.g. sperm, nuptial gifts) that elevate fertility/fecundity. Experiments that standardize the number of matings per female also show that polyandry can improve aspects of offspring performance, most notably early embryo survival (egg hatching success). This improvement is widely attributed to genetic benefits which would arise if polyandrous females skew paternity to produce fitter offspring. In two separate experiments with field crickets (Teleogryllus commodus) polyandrous females (two, three or four mates) did not have higher egg hatching success than monandrous females (effect sizes: r = 0.03 and 0.08 for the respective experiments), which is consistent with our finding of no sire effect on hatching success. Polyandry also had no effect on post-hatching offspring survival. Polyandrous females' offspring took significantly longer to mature but their sons were not heavier and their daughters were actually significantly smaller than those of monandrous females. Finally, after controlling for relative male size, monandrous females' sons were more successful when directly competing for a mate.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Jennions MD,Drayton JM,Brooks R,Hunt Jdoi
10.1111/j.1420-9101.2007.01333.xsubject
Has Abstractpub_date
2007-07-01 00:00:00pages
1469-77issue
4eissn
1010-061Xissn
1420-9101pii
JEB1333journal_volume
20pub_type
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