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Updated: Jul 3, 2026

Measuring Neural and Behavioral Activity During Ongoing Computerized Social Interactions: An Examination of Event-Related Brain Potentials

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Published on: November 15, 2014

Social information and emigration: lessons from immigrants.

J Cote¹, J Clobert

¹Laboratoire Fonctionnement et Evolution des Systèmes Ecologiques, Université Pierre et Marie Curie, 7, quai Saint-Bernard, 75005 Paris, France.

Ecology Letters

|May 15, 2007

Summary

Potential emigrants may receive crucial information from immigrants about population densities. This study shows immigrants influence emigration decisions, impacting species persistence in fragmented habitats.

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Area of Science:

Ecology
Behavioral Ecology
Evolutionary Biology

Background:

Dispersal is a key factor in species persistence, especially in fragmented habitats.
Emigration decisions are often made with incomplete information, incurring significant costs.
Previous research focused on post-emigration information gathering, neglecting pre-emigration information acquisition.

Purpose of the Study:

To investigate if immigrants transmit information about their origin population's density to potential emigrants.
To determine the effect of immigrant-derived information on resident emigration decisions.

Main Methods:

Manipulated population densities of common lizards (Lacerta vivipara).
Introduced immigrants from these manipulated populations into a new population.
Observed and analyzed the emigration rates of resident lizards based on the origin of the immigrants.

Main Results:

Resident emigration was significantly influenced by the origin of the introduced immigrants.
Immigrants acted as a source of information regarding surrounding population densities.
The origin of immigrants affected the dispersal patterns of the resident population.

Conclusions:

Immigrants serve as a vital information channel for potential emigrants regarding habitat conditions.
Immigrant-mediated information can significantly impact dispersal dynamics.
This information transfer mechanism is crucial for species persistence in fragmented landscapes.