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Related Concept Videos

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...
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.
Conservation of Small Populations02:04

Conservation of Small Populations

Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less likely to...
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...
Conservation of Declining Populations02:07

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
Mutation, Gene Flow, and Genetic Drift01:09

Mutation, Gene Flow, and Genetic Drift

In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).

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Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

Mating system affects population performance and extinction risk under environmental challenge.

Agata Plesnar-Bielak1, Anna M Skrzynecka, Zofia M Prokop

  • 1Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland.

Proceedings. Biological Sciences
|September 15, 2012
PubMed
Summary
This summary is machine-generated.

Mating systems significantly influence survival during environmental change. Polygamous bulb mite populations thrived in higher temperatures, while monogamous populations went extinct, highlighting the adaptive role of mating systems.

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Area of Science:

  • Evolutionary biology
  • Ecology
  • Population genetics

Background:

  • Organismal adaptation to environmental shifts is crucial for survival.
  • Mating systems can influence population adaptability through effects on fertility and sexual selection.

Purpose of the Study:

  • To investigate the impact of mating systems on population performance during environmental change.
  • To determine if mating systems affect extinction risk under novel conditions.

Main Methods:

  • Experimental evolution was employed using bulb mites (Rhizoglyphus robini).
  • Populations were subjected to controlled environmental changes, specifically increased temperature.
  • Monogamy and polygamy were experimentally enforced to compare their effects.

Main Results:

  • Monogamous populations showed a significant decline in fitness and went extinct within 17 generations under increased temperature.
  • Polygamous populations demonstrated resilience and survived the environmental challenge.
  • The mating system modulated the negative effects of thermal environmental change.

Conclusions:

  • The mating system plays a critical role in a population's ability to adapt to environmental change.
  • Polygamy may confer a survival advantage in the face of rapid environmental shifts.
  • Understanding mating systems is vital for predicting extinction risk in changing environments.