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Related Concept Videos

Mate Choice01:20

Mate Choice

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Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
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Frequency-dependent Selection01:21

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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Background and Environment Affect Phenotype02:27

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
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Natural Selection and Mating Preferences01:06

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The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
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In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.  
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In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
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Observation and Quantification of Mating Behavior in the Pinewood Nematode, Bursaphelenchus xylophilus
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Mating frequency mediates personality expression in facultatively polyandrous mites.

Peter Schausberger1,2, Shogo Usugi3, Chenhao Wang3

  • 1Laboratory of Ecological Information, Graduate School of Agriculture, Kyoto University, Sakyo-Ku, Kyoto, 606-8502, Japan. peter.schausberger@univie.ac.at.

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Summary

Female mating frequency influences animal personality. Multiple matings increase females' sociability and behavioral consistency, suggesting a strategy to protect fitness by reducing social conflict.

Keywords:
ActivityAnimal personalityAsset protectionMating frequencyMitesMonandryPolyandryRepeatabilityResidual reproductive valueSociability

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Area of Science:

  • Behavioral Ecology
  • Animal Personality Studies
  • Evolutionary Biology

Background:

  • Animal personalities exhibit consistent individual differences.
  • Personality expression is influenced by life events like mating and reproduction.
  • Facultatively polyandrous females may gain assets (residual reproductive value) from multiple matings.

Purpose of the Study:

  • To test if increased mating frequency in females enhances their assets.
  • To investigate if higher assets promote behaviors that reduce fitness loss.
  • To determine if mating influences behavioral repeatability in group settings.

Main Methods:

  • Study conducted on group-living predatory mites (Phytoseiulus persimilis).
  • Females were exposed to one or two mates.
  • Postmating repeatability of activity and sociability was assessed in mixed and same mating-type groups.

Main Results:

  • Mating frequency had minimal impact on activity but significantly affected sociability.
  • Polyandrous females displayed greater sociability and repeatability in sociability than monandrous females.
  • Behavioral changes in polyandrous females serve as strategies for asset protection within groups.

Conclusions:

  • Mating frequency critically influences female personality expression post-mating.
  • Mate-related variables are crucial for understanding animal personality.
  • Asset protection principle may explain behavioral shifts in response to mating strategies.