The Strength of Direct Selection against Female Promiscuity Is Associated with Rates of Extrapair Fertilizations in Socially Monogamous Songbirds

2006 ◽  
Vol 167 (5) ◽  
pp. 739-744 ◽  
Author(s):  
Tomáš Albrecht ◽  
Jakub Kreisinger ◽  
Jaroslav Piálek
Keyword(s):  
Direct Selection ◽  
Female Promiscuity ◽  
Socially Monogamous

scholarly journals Extrapair mating between relatives in the barn swallow: a role for kin selection?

2005 ◽  
Vol 1 (4) ◽  
pp. 389-392 ◽  
Author(s):  
Oddmund Kleven ◽  
Frode Jacobsen ◽  
Raleigh J Robertson ◽  
Jan T Lifjeld
Keyword(s):  
Kin Selection ◽  
Barn Swallow ◽  
Random Choice ◽  
Extrapair Mating ◽  
Female Promiscuity ◽  
Social Partners ◽  
Socially Monogamous ◽  
Insurance Mechanism ◽  
Genetic Parents ◽  
New Hypothesis

Why do females of many species mate with more than one male? One of the main hypotheses suggests that female promiscuity is an insurance mechanism against the potential detrimental effects of inbreeding. Accordingly, females should preferably mate with less related males in multiple or extrapair mating. Here we analyse paternity, relatedness among mating partners, and relatedness between parents and offspring, in the socially monogamous North American barn swallow ( Hirundo rustica erythrogaster ). In contrast to the inbreeding avoidance hypothesis, we found that extrapair mating partners were more related than expected by random choice, and tended to be more related than social partners. Furthermore, extrapair mating resulted in genetic parents being more related to their extrapair young than to their withinpair young. We propose a new hypothesis for extrapair mating based on kin selection theory as a possible explanation to these findings.

scholarly journals The role of genetic constraints and social environment in explaining female extra-pair mating

2019 ◽  
Author(s):  
Daiping Wang ◽  
Wolfgang Forstmeier ◽  
Katrin Martin ◽  
Alastair Wilson ◽  
Bart Kempenaers
Keyword(s):  
Statistical Power ◽  
Genetic Correlations ◽  
Social Environments ◽  
Genetic Constraints ◽  
Female Promiscuity ◽  
Monogamous Species ◽  
Socially Monogamous ◽  
Pair Mating ◽  
Extra Pair Mating

AbstractWhy females of socially monogamous species copulate with males other than their partner has been a long-standing, unresolved puzzle. We previously reported that female promiscuity appears to be a genetic corollary of male promiscuity (intersexual pleiotropy hypothesis). Here we put this earlier finding to a critical test using the same population of zebra finches Taeniopygia guttata. After three generations of artificial selection on male courtship rate, a correlate of extra-pair mating, we assess whether female promiscuity changed by indirect selection and we re-examine the crucial genetic correlations. Our new analyses with substantially increased statistical power clearly reject the hypothesis that male and female promiscuity are genetically homologous traits. Our study highlights that individual females show low repeatability in extra-pair mating behavior across different social environments. This emphasizes the potential importance of pair bond strength and the availability of favored extra-pair males as factors explaining variation in patterns of female promiscuity.

Evidence of obligate female promiscuity in a socially monogamous passerine

2006 ◽  
Vol 60 (2) ◽  
pp. 255-259 ◽  
Author(s):  
Frode Fossøy ◽  
Arild Johnsen ◽  
Jan T. Lifjeld
Keyword(s):  
Female Promiscuity ◽  
Socially Monogamous

scholarly journals Measuring Pre- and Post-Copulatory Sexual Selection and Their Interaction in Socially Monogamous Species with Extra-Pair Paternity

Cells ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 620
Author(s):  
Emily Rebecca Alison Cramer
Keyword(s):  
Sexual Selection ◽  
Fertilization Success ◽  
Direct Selection ◽  
Selection Gradients ◽  
Extra Pair Paternity ◽  
Male Trait ◽  
Monogamous Species ◽  
Socially Monogamous ◽  
Sperm Trait ◽  
Sperm Traits

When females copulate with multiple males, pre- and post-copulatory sexual selection may interact synergistically or in opposition. Studying this interaction in wild populations is complex and potentially biased, because copulation and fertilization success are often inferred from offspring parentage rather than being directly measured. Here, I simulated 15 species of socially monogamous birds with varying levels of extra-pair paternity, where I could independently cause a male secondary sexual trait to improve copulation success, and a sperm trait to improve fertilization success. By varying the degree of correlation between the male and sperm traits, I show that several common statistical approaches, including univariate selection gradients and paired t-tests comparing extra-pair males to the within-pair males they cuckolded, can give highly biased results for sperm traits. These tests should therefore be avoided for sperm traits in socially monogamous species with extra-pair paternity, unless the sperm trait is known to be uncorrelated with male trait(s) impacting copulation success. In contrast, multivariate selection analysis and a regression of the proportion of extra-pair brood(s) sired on the sperm trait of the extra-pair male (including only broods where the male sired ≥1 extra-pair offspring) were unbiased, and appear likely to be unbiased under a broad range of conditions for this mating system. In addition, I investigated whether the occurrence of pre-copulatory selection impacted the strength of post-copulatory selection, and vice versa. I found no evidence of an interaction under the conditions simulated, where the male trait impacted only copulation success and the sperm trait impacted only fertilization success. Instead, direct selection on each trait was independent of whether the other trait was under selection. Although pre- and post-copulatory selection strength was independent, selection on the two traits was positively correlated across species because selection on both traits increased with the frequency of extra-pair copulations in these socially monogamous species.

scholarly journals MULTIPLE GENETIC BENEFITS OF FEMALE PROMISCUITY IN A SOCIALLY MONOGAMOUS PASSERINE

Evolution ◽  
2007 ◽  
Vol 62 (1) ◽  
pp. 145-156 ◽  
Author(s):  
Frode Fossøy ◽  
Arild Johnsen ◽  
Jan T. Lifjeld
Keyword(s):  
Genetic Benefits ◽  
Female Promiscuity ◽  
Socially Monogamous
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