Introduction

Chapter Objectives

1. Provide background information on the purse-seine bycatch species of greatest concern
2. Summarize best practices for each of the bycatch mitigation hierarchy steps to avoid and reduce bycatch
3. Describe techniques for the safe handling and release of bycatch

Understanding Bycatch Mitigation Steps or Hierarchy

Bycatch in purse-seine fisheries presents a significant challenge to sustainable fishing. To address this issue effectively, a hierarchical — or step-by-step — approach can be adopted at various stages of the fishing operation. This means prioritizing actions that prevent or avoid bycatch before fishing begins, rather than relying solely on post-catch measures that are more likely to result in unwanted bycatch mortality.

Different actions can be implemented during different stages of the fishing process. Below, we outline the tiers of the bycatch mitigation hierarchy, with practical examples relevant to purse-seine fisheries.