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Development and Testing of an Aquaculture Environmental Control System Based on Behavioral Stress Responses.

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  • 1School of Science and Technology, Shanghai Open University, Shanghai 200433, China.

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|December 30, 2025
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Summary

This study introduces an intelligent aquaculture system using behavioral stress feedback for crucian carp. The system optimizes environmental control, significantly boosting profits and reducing fish stress for sustainable aquaculture.

Keywords:
aquaculturecontrolcrucian carpstress behavior

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Area of Science:

  • Aquaculture Engineering
  • Animal Behavior
  • Computational Biology

Background:

  • Intensive aquaculture faces challenges in passive environmental control, high energy use, and fish stress.
  • Current systems often neglect dynamic environmental adjustments based on fish well-being.

Purpose of the Study:

  • To develop a multi-objective environmental regulation system for crucian carp using behavioral stress feedback.
  • To optimize the output-input ratio by integrating behavior recognition, growth, and energy cost models.
  • To enhance both economic efficiency and animal welfare in aquaculture.

Main Methods:

  • Utilized YOLOv8s-FasterNet for real-time fish behavior recognition.
  • Developed specific growth rate and energy cost models for decision-making.
  • Implemented a multi-objective intelligent decision-making mechanism.
  • Conducted a 25-day experimental trial comparing the system to traditional threshold control.

Main Results:

  • The system demonstrated comparable final body weight and specific growth rate to the control group.
  • Achieved periodic profits 8.93, 1.43, and 1.03 times higher than traditional control at 2°C, 8°C, and 14°C, respectively.
  • Significantly reduced stress-induced damage in fish, with scores closer to healthy baseline compared to the control group.
  • Confirmed substantial energy savings through optimized environmental regulation.

Conclusions:

  • The developed intelligent system effectively balances economic profitability and fish health in intensive aquaculture.
  • Behavioral stress feedback provides a viable mechanism for optimizing environmental control.
  • This approach offers a promising solution for sustainable and intelligent aquaculture management.