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Related Experiment Video

Updated: Jun 12, 2026

Visually Sexing Loggerhead Shrike (Lanius Ludovicianus) Using Plumage Coloration and Pattern

Visually Sexing Loggerhead Shrike (Lanius Ludovicianus) Using Plumage Coloration and Pattern

Published on: March 8, 2020

Risky dispersal: avoiding kin competition despite uncertainty.

J Cote¹, J Clobert

¹Laboratoire Fonctionnement et Evolution des Systèmes Ecologiques, Université Pierre et Marie Curie, 7, Quai Saint-Bernard, 75005 Paris, France. jdcote@ucdavis.edu

|May 28, 2010

Summary

Dispersal decisions in common lizards depend on the reason for leaving and individual body mass. Information from immigrants helps reduce risks, especially when competition drives dispersal, influencing whether larger or smaller lizards move.

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Area of Science:

Ecology
Evolutionary Biology
Behavioral Ecology

Background:

Dispersal is crucial for population dynamics and range expansion.
Information about habitat connectivity can mitigate dispersal risks.
Dispersal strategies may vary based on the cause of dispersal and individual traits.

Purpose of the Study:

To investigate how dispersal decisions in common lizards are influenced by the reason for dispersal (intraspecific vs. kin competition) and individual phenotype (body mass).
To determine if lizards use information from immigrants to assess habitat connectivity and adjust dispersal strategies.

Main Methods:

Field study on common lizards (Lacerta vivipara).
Observation of dispersal decisions in relation to patch connectivity.
Analysis of how dispersal patterns differ based on the cause of dispersal and individual body mass.

Main Results:

Dispersal decisions were contingent on both the cause of dispersal and body mass.
When intraspecific competition was the driver, lizards used connectivity information: larger lizards dispersed in low connectivity, smaller lizards in high connectivity.
When kin competition dominated, dispersal decisions were independent of connectivity, with larger lizards dispersing regardless of patch status.

Conclusions:

Kin competition may be a significant factor driving colonization, as it leads to dispersal decisions less influenced by environmental information.
Individual phenotype and the specific ecological pressures (competition type) interact to shape dispersal strategies.
Common lizards utilize information about habitat connectivity, but the extent of this utilization depends on the underlying reasons for dispersal.