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Reproductive Techniques for Ovarian Monitoring and Control in Amphibians
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Alternative reproductive tactics and evolutionary rescue.

Robert J Knell1, Jonathan M Parrett2

  • 1School of Natural Sciences, University of Hull, Hull, United Kingdom.

Evolution Letters
|August 5, 2024
PubMed
Summary
This summary is machine-generated.

Alternative reproductive tactics (ARTs) in males can disrupt or enhance a population's ability to adapt to environmental change. Fixed ARTs aid adaptation and evolutionary rescue, while simultaneous ARTs hinder it by increasing maladaptive gene flow.

Keywords:
adaptationchanging environmentsmating systemspolyphenismsexual selection“sneak” matings

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Area of Science:

  • Evolutionary biology
  • Population genetics
  • Ecology

Background:

  • Environmental change poses a threat to global biodiversity.
  • Sexual selection can accelerate population adaptation.
  • Alternative reproductive tactics (ARTs) in males complicate mating dynamics.

Purpose of the Study:

  • To investigate the impact of ARTs on population adaptation and evolutionary rescue under environmental change.
  • To determine how different types of ARTs (simultaneous vs. fixed) affect adaptive capacity.

Main Methods:

  • Individual-based modeling approach.
  • Simulations exploring scenarios with simultaneous and fixed ARTs.
  • Analysis of population adaptation rates and likelihood of evolutionary rescue.

Main Results:

  • Simultaneous ARTs reduce adaptive capacity and the probability of evolutionary rescue by increasing gene flow from low-quality males.
  • Fixed ARTs enhance adaptive capacity and evolutionary rescue by increasing mating success for high-quality males.
  • The type of ART critically influences population resilience to environmental change.

Conclusions:

  • ARTs can have contrasting effects on a population's ability to adapt to environmental change.
  • Fixed ARTs can promote evolutionary rescue, while simultaneous ARTs can impede it.
  • Understanding ARTs is crucial for predicting species' responses to global environmental shifts.