Experimental Design for Testing Bycatch Reduction Devices in Crab Traps

Feb 07, 2026

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This project aims to design an experiment that tests the effectiveness of Bycatch Reduction Devices (BRDs) in crab traps to minimize the catch of Diamondback Terrapins while still allowing for blue crab harvest. The experiment will involve multiple trials to ensure accuracy, with clear distinctions between independent and dependent variables. Constants will be established to control external factors, and different levels of BRD implementation will be tested. The goal is to develop a sustainable solution that balances crab fishing with the conservation of terrapins.

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Experimental Design for Testing Bycatch Reduction Devices in Crab Traps

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Ms. Jacobson Bruton High School October 31, 2012 Ms. Jacobson October 31, 2012
Diamondback Terrapin Malaclemys terrapin
Blue crab: Callinectessapidus
THE PROBLEM:
I just wish there was someone out there who could figure out how to catch crabs without catching me!
How can we keep terrapins out of crab traps but still catch crabs? Diamondback Terrapin: Males: 10cm wide 5cm tall Females: 15cm wide 7cm tall Blue crab: 12.5cm wide 2.5 cm tall
BRD! (Bycatch reduction device)
Your Task: Make an Experimental Design Diagram showing how you would test the ability of BRDs to reduce the number of terrapins caught in crab traps. Terms to Include: • Trials • Constants • IV • DV • Levels