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Related Experiment Videos

Selection, inheritance, and the evolution of parent-offspring interactions.

Judith E Lock1, Per T Smiseth, Allen J Moore

  • 1School of Biological Sciences, University of Manchester, Manchester M13 9PT, United Kingdom.

The American Naturalist
|July 22, 2004
PubMed
Summary

Quantitative genetics reveals how parent-offspring behaviors are linked. Positive genetic correlations and trade-offs maintain variation in traits like parental provisioning and offspring begging in burying beetles.

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Area of Science:

  • Behavioral Ecology
  • Quantitative Genetics
  • Evolutionary Biology

Background:

  • Parent-offspring interactions are crucial for fitness.
  • Few studies use quantitative genetics to study these interactions.
  • Understanding genetic links and selection pressures is key to explaining behavioral variation.

Purpose of the Study:

  • To investigate genetic correlations between parental and offspring behaviors.
  • To quantify social selection on these behaviors in burying beetles.
  • To explain the persistence of behavioral variation in parent-offspring interactions.

Main Methods:

  • Utilized a cross-fostering design in Nicrophorus vespilloides.
  • Assessed genetic correlations independent of social influences.

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  • Measured selection gradients on parental provisioning, larval begging, and sibling competition.

    • Main Results:

    • Found positive genetic correlations among all measured parental and offspring behaviors.
    • Parental provisioning positively impacted offspring performance and fitness.
    • Larval begging positively affected offspring performance, while sibling competition had negative effects.

    Conclusions:

    • Genetic correlations and functional trade-offs maintain coadaptations between parent and offspring behaviors.
    • Variation persists in beneficial traits due to linked genetic effects and ecological trade-offs.
    • Studying suites of functionally related behaviors is essential for a comprehensive understanding.