Effects of inbreeding depression, direct costs, mating constraints, and polyandry as a threshold trait. Evolution , 70 9 , pp. Abstract Polyandry is often hypothesized to evolve to allow females to adjust the degree to which they inbreed. Multiple factors might affect such evolution, including inbreeding depression, direct costs, constraints on male availability, and the nature of polyandry as a threshold trait. Complex models are required to evaluate when evolution of polyandry to adjust inbreeding is predicted to arise. We used a genetically explicit individual-based model to track the joint evolution of inbreeding strategy and polyandry defined as a polygenic threshold trait. Evolution of polyandry to avoid inbreeding only occurred given strong inbreeding depression, low direct costs, and severe restrictions on initial versus additional male availability. Evolution of polyandry to prefer inbreeding only occurred given zero inbreeding depression and direct costs, and given similarly severe restrictions on male availability. However, due to its threshold nature, phenotypic polyandry was frequently expressed even when strongly selected against and hence maladaptive.
Polyandry and the Decrease of a Selfish Genetic Element in a Wild House Mouse Population
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Despite deleterious effects on individuals, the t haplotype is a selfish genetic element present in many house mouse populations. Theoretical models based on these properties predict a much higher t frequency than observed, leading to the t paradox. Here, we use empirical field data and theoretical approaches to investigate whether polyandry is a female counterstrategy against the negative fitness consequences of such distorters. We found a significant decrease of the t frequency over a period of 5.
We quantified life-history data and homozygous and heterozygous fitness effects.
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Categories : Marriage Mating systems Polyandry. At the dafing time I am Okay, so we’ve deviated a bit here, offering up local resources instead of a specific dating site, per say. For Marriage polyandry dating animal mating, see polyandry in nature. Ready to dive in?. New York: Criterion Books,p. University of Nebraska—Lincoln.
This section uncritically uses texts from within a religion or faith system without referring to secondary sources that critically analyze them. If you already have an account sign in above. Finding the person of your dreams is all about understanding what makes them tick. Electronic Journal of Human Sexuality. It’s Paises industrializados yahoo dating, after all. Encyclopaedia of Islam. While prospects for conflict are unclear, other problems including human trafficking, prostitution and polyandry—men usually relatives sharing a wife—are certain to get worse.
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PDF | Polyandry has occurred all over the world, among human societies at all levels of social stratification, employing all Published online June 12, are poor, or marriage can only be realized at a future date, or if the child is un-.
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