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Fixed Action Patterns

Fixed Action Patterns

A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.

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Related Experiment Video

Updated: Dec 13, 2025

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

Catch a Tiny Fish by the Tail

Henk L Granzier¹

¹Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona.

Biophysical Journal

|August 1, 2020

Summary

No abstract available in PubMed .

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