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Gene Flow02:39

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Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
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Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
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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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Related Experiment Video

Updated: Jun 16, 2025

Using the FishSim Animation Toolchain to Investigate Fish Behavior: A Case Study on Mate-Choice Copying In Sailfin Mollies
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Using the FishSim Animation Toolchain to Investigate Fish Behavior: A Case Study on Mate-Choice Copying In Sailfin Mollies

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Mate-choice copying accelerates species range expansion.

Manuel Sapage1,2, Mauro Santos1,3,4, Margarida Matos1,2

  • 1cE3c - Centre for Ecology, Evolution and Environmental Changes & CHANGE - Global Change and Sustainability Institute, Faculty of Sciences, University of Lisbon , Campo Grande, Lisbon 1749-016, Portugal.

Proceedings. Biological Sciences
|August 21, 2024
PubMed
Summary
This summary is machine-generated.

Mate-choice copying, a social learning behavior, can accelerate population expansion across environments. Its adaptiveness depends on how individuals learn mate preferences and the genetic basis of the targeted trait.

Keywords:
individual-based simulationslocal adaptationmate-choice copyingpopulation dynamicssexual selectionsocial learning

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Area of Science:

  • Evolutionary Biology
  • Behavioral Ecology
  • Population Genetics

Background:

  • Mate-choice copying is a social learning mechanism where females adjust mating preferences based on other females' choices.
  • This behavior can influence population dynamics, potentially impacting dispersal and local adaptation.
  • Understanding mate-choice copying is crucial for predicting population expansion and evolutionary trajectories.

Purpose of the Study:

  • To investigate how mate-choice copying affects the speed and success of population expansion across environmental gradients.
  • To compare the impact of different mate-choice copying strategies (targeting single vs. similar individuals) and trait determination (genotype-only vs. genotype-by-environment interaction).

Main Methods:

  • Agent-based modeling was used to simulate populations expanding across an environmental gradient.
  • Two mate-choice copying strategies were implemented: targeting a single male or targeting similar males.
  • The genetic basis of the male trait was varied: determined solely by genotype or influenced by genotype-by-environment interactions.

Main Results:

  • When traits are solely genotype-determined, populations with females targeting similar males expanded faster, increasing the number of potential copiers.
  • When traits involve genotype-by-environment interactions, populations with females targeting single males showed higher dispersal and faster expansion, but fewer potential copiers.
  • Mate-choice copying can accelerate population spread, but its adaptive value varies with the context and information used.

Conclusions:

  • Mate-choice copying can be a significant factor in accelerating range expansion.
  • The specific strategy of mate-choice copying and the genetic architecture of the preferred trait critically influence population expansion dynamics and adaptiveness.
  • These findings highlight the complex interplay between social learning, genetics, and environmental factors in shaping ecological and evolutionary processes.