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Related Concept Videos

Mate Choice01:20

Mate Choice

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.
Natural Selection and Mating Preferences01:06

Natural Selection and Mating Preferences

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.
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...
Types of Selection01:46

Types of Selection

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...
Speciation Rates01:07

Speciation Rates

Overview
Frequency-dependent Selection01:21

Frequency-dependent Selection

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.
What is a Species?01:17

What is a Species?

Overview

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Related Experiment Video

Updated: May 28, 2026

Measuring and Altering Mating Drive in Male Drosophila melanogaster
07:02

Measuring and Altering Mating Drive in Male Drosophila melanogaster

Published on: February 15, 2017

Mating system shifts on the trailing edge.

Donald A Levin1

  • 1Section of Integrative Biology, University of Texas-Austin, TX 78713, USA. dlevin@uts.cc.utexas.edu

Annals of Botany
|October 8, 2011
PubMed
Summary
This summary is machine-generated.

Global warming threatens trailing edge species. Increased self-fertilization may help populations survive stress, but it reduces genetic diversity, hindering long-term adaptation.

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Last Updated: May 28, 2026

Measuring and Altering Mating Drive in Male Drosophila melanogaster
07:02

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Visually Sexing Loggerhead Shrike (Lanius Ludovicianus) Using Plumage Coloration and Pattern
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Observation and Quantification of Mating Behavior in the Pinewood Nematode, Bursaphelenchus xylophilus
09:55

Observation and Quantification of Mating Behavior in the Pinewood Nematode, Bursaphelenchus xylophilus

Published on: December 25, 2016

Area of Science:

  • Ecology
  • Evolutionary Biology
  • Conservation Biology

Background:

  • Trailing edge populations face extinction risk due to climate change.
  • Focus has been on physiological traits, neglecting mating patterns.
  • Mating patterns influence population size and adaptive capacity.

Purpose of the Study:

  • Investigate the role of mating patterns in trailing edge populations.
  • Explore the potential for increased self-fertilization under stress.
  • Assess the impact of self-fertilization on population viability and adaptation.

Main Methods:

  • The study hypothesizes plastic responses to stress increase self-fertilization rates.
  • Examines evidence for stress-induced changes in self-compatibility and floral morphology.
  • Analyzes the consequences of altered mating patterns on genetic diversity.

Main Results:

  • Small trailing edge populations exhibit low cross-fertilization due to poor pollination and limited self-incompatibility alleles.
  • Self-compatible plants may increase self-fertilization under stress.
  • Stress can induce floral changes that promote self-pollination.

Conclusions:

  • Increased self-fertilization can partially offset reduced cross-fertilization in stressed populations.
  • While offering a temporary survival advantage, increased selfing significantly reduces genetic diversity.
  • Reduced genetic diversity may ultimately impede adaptation to environmental change.