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Boldness, Aggression, and Shoaling Assays for Zebrafish Behavioral Syndromes

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Testing Cheverud's conjecture for behavioral correlations and behavioral syndromes.

Ned A Dochtermann¹

¹Department of Biology; University of Nevada, Reno, Reno, Nevada 89557

Evolution; International Journal of Organic Evolution

|June 8, 2011

Summary

Phenotypic correlations between animal behaviors reliably indicate genetic correlation direction but not always magnitude. Researchers must carefully consider questions to use these correlations effectively for understanding evolutionary implications.

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Area of Science:

Behavioral ecology
Quantitative genetics
Animal behavior

Background:

Behavioral syndromes and animal personalities research often assumes phenotypic correlations reflect genetic correlations.
The concordance between phenotypic and genetic correlations for behaviors has not been rigorously evaluated.

Purpose of the Study:

To test the assumption that phenotypic correlations accurately represent genetic correlations in behaviors.
To assess the reliability of phenotypic correlations for estimating the magnitude and direction of genetic correlations in animal behavior.

Main Methods:

Analysis of published estimates of phenotypic and genetic correlations for behaviors.
Statistical examination of the relationship between phenotypic and genetic correlation values.

Main Results:

Phenotypic and genetic correlations for behaviors are strongly related.
The average absolute difference between phenotypic and genetic correlations is high, similar to other traits.
Phenotypic correlations explain 75% of the variation in genetic correlations and typically share the same sign.

Conclusions:

Phenotypic correlations reliably estimate the direction of underlying genetic relationships for behaviors.
While not always precise for magnitude, phenotypic correlations offer significant insights into genetic correlations and their evolutionary implications.
Researchers can use phenotypic correlations cautiously to infer genetic underpinnings of behavioral syndromes and animal personalities.