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Effects of shady environments on fish collective behavior
Haroldo V Ribeiro1, Matthew R Acre2, Jacob D Faulkner3
1Departamento de Física, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brazil. hvr@dfi.uem.br.
Scientific Reports
|October 25, 2022
Summary
Shady environments influence Silver Carp movement, making them slower and less interactive during the day. Fish exhibit higher speeds and persistence at night, with shade impacting schooling behavior.
Area of Science:
- Animal behavior
- Collective movement
- Ichthyology
Background:
- Understanding collective animal movement is crucial.
- Environmental factors significantly influence group dynamics.
- The impact of shade on fish behavior is understudied.
Purpose of the Study:
- To investigate the effects of shady environments on Silver Carp (Hypophthalmichthys molitrix) collective movement.
- To analyze how shade influences fish speed, persistence, and schooling behavior.
Main Methods:
- Time series analysis
- Complex network tools
- Behavioral observation in earthen ponds
Main Results:
- Shade increases fish residence during daylight.
- Fish are slower and less persistent under shade compared to open areas.
- Shade reduces schooling polarization, interactions, and neighbor stability.
- Fish maintain higher local order in shade than at night.
Conclusions:
- Shade is a significant environmental factor affecting Silver Carp behavior.
- Shade alters individual movement patterns and group coordination.
- Environmental context is critical for understanding collective animal dynamics.
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