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Related Concept Videos

Fixed Action Patterns01:06

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: Jun 3, 2026

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish
14:58

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish

Published on: April 6, 2019

Do blind cavefish have behavioral specializations for active flow-sensing?

Delfinn Tan1, Paul Patton, Sheryl Coombs

  • 1Department of Biological Sciences, JP Scott Center for Neuroscience, Mind and Behavior, Bowling Green State University, OH 43403, USA.

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
|March 25, 2011
PubMed
Summary
This summary is machine-generated.

Blind cavefish (Astyanax) use their lateral line system for active flow-sensing. Blind cavefish exhibit specialized swimming behaviors, utilizing lateral line feedback for navigation in novel environments.

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Area of Science:

  • Behavioral Ecology
  • Sensory Biology
  • Neuroethology

Background:

  • Blind cavefish rely on active sensing via their lateral line system.
  • Burst-coast swimming generates flow signals crucial for detection.
  • Understanding behavioral adaptations for flow-sensing is key.

Purpose of the Study:

  • Investigate behavioral specializations in blind cavefish for active flow-sensing.
  • Determine if blind cavefish regulate flow signal production using lateral line feedback.
  • Compare swimming kinematics between blind and sighted Astyanax morphs.

Main Methods:

  • Comparative analysis of swimming kinematics in blind and sighted Astyanax.
  • Manipulation of lateral line functionality (deprivation).
  • Observation in novel, dark environments after familiarization periods.

Main Results:

  • Blind morphs showed a higher incidence of straight swim cycles compared to sighted morphs.
  • Lateral line deprivation and environmental familiarization reduced straight swim cycles in blind morphs.
  • Swimming kinematics were largely conserved, but blind morphs demonstrated enhanced lateral line feedback use.

Conclusions:

  • Blind cavefish possess evolved abilities to use lateral line feedback for navigation.
  • This specialization aids in linking swim cycles for straight trajectories.
  • Behavioral adaptations address limitations of active flow-sensing in spatial orientation.