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Related Concept Videos

Natural Selection and Mating Preferences01:06

Natural Selection and Mating Preferences

166
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,...
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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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Criticisms of the Evolutionary Perspective01:23

Criticisms of the Evolutionary Perspective

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In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
Evolutionary psychology provides one explanation for these findings, suggesting...
153
Evolutionary Psychology01:20

Evolutionary Psychology

386
Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the...
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Types of Selection01:46

Types of Selection

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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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Frequency-dependent Selection01:21

Frequency-dependent Selection

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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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Effect of Male Accessory Gland Products on Egg Laying in Gastropod Molluscs
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Resource acquisition and pre-copulatory sexual selection.

Hope Klug1,2, Chelsea Langley1, Elijah Reyes3

  • 1Department of Biology, Geology, and Environmental Science University of Tennessee at Chattanooga Chattanooga Tennessee USA.

Ecology and Evolution
|July 28, 2022
PubMed
Summary
This summary is machine-generated.

Resource acquisition significantly impacts sexual selection on mating traits. Mathematical models reveal that the timing of selection, trait trade-offs, and resource availability influence these evolutionary dynamics.

Keywords:
mate availabilitymate competitionmate limitationresource availabilityresource competitionsexual selection

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Area of Science:

  • Evolutionary biology
  • Behavioral ecology
  • Quantitative genetics

Background:

  • Sexual selection drives phenotypic evolution and biodiversity.
  • Animal mating often involves sequential resource acquisition and mate competition.
  • Existing research highlights resource acquisition's role in sexual selection, but lacks predictive models.

Purpose of the Study:

  • To develop a mathematical framework predicting how resource acquisition influences sexual selection.
  • To explore the impact of trade-offs between resource and mate acquisition traits.
  • To generate testable predictions for the evolution of mating traits.

Main Methods:

  • Utilized a mathematical modeling approach.
  • Investigated biologically relevant trade-off scenarios.
  • Analyzed selection across different mating and pre-mating pools.

Main Results:

  • Sexual selection on mate-acquisition traits is sensitive to the selection episode considered.
  • The association (positive or trade-off) between resource and mate acquisition traits is critical.
  • The proportion of individuals possessing these traits significantly modulates selection pressures.

Conclusions:

  • Resource acquisition is a key factor shaping sexual selection on mating traits.
  • Mathematical models provide a priori predictions for when and how resource acquisition influences sexual selection.
  • Findings offer testable hypotheses for empirical research on mating systems and sexual selection.