When is enough, enough? Quantifying trade-offs between information quality and sampling effort for fishing gear...

Area of Science:

• Fisheries Science
• Marine Biology
• Conservation Technology

Background:

• Global fisheries face pressure for increased industry involvement in fishing gear development and performance evaluation.
• European Union policies emphasize flexibility and stakeholder engagement in fisheries management.
• Developing new fishing gears requires industry participation in testing and data collection.

Purpose of the Study:

• To determine the necessary sample size for accurately evaluating the relative selective performance of new fishing gears compared to standard gears.
• To assess the trade-offs between sampling effort and uncertainty in data collection for fisheries management.

Main Methods:

• Analysis of catch ratio curves and their associated uncertainties.
• Evaluation of the relationship between sampling effort and data accuracy.
• Statistical analysis of fish length data collected from different fishing gears.

Main Results:

• Accurate evaluation of fishing gear performance is achievable with relatively small sample sizes (500 to 1000 individuals) per species.
• Catch ratio curves and uncertainty analysis effectively measure gear selectivity.
• Industry-collected data on fish length can reliably assess gear performance.

Conclusions:

• Empowering the fishing industry to develop, test, and collect data on fishing gears enhances management flexibility.
• Small-scale data collection efforts by fishermen are sufficient for evaluating gear selectivity.
• Increased industry involvement in gear innovation can lead to more diverse and effective fisheries solutions.