How effective is electronic monitoring in mixed bottom-trawl fisheries?

摘要: In the context of landing obligation under European Common Fisheries Policy, electronic monitoring (EM) is often presented as one solutions to fully document catches. EM includes video record catch handling process on board vessels. This study evaluated efficacy for cod (Gadus morhua) catches vessels in a mixed bottom-trawl fishery and tested hypothesis that are difficult detect with monitoring, specifically large volumes bycatch. 2011, quota pilot started Dutch which was used an audit system review consistency reported Eleven joined voluntary basis. Participants received 30% increase individual were compensated extra effort days at sea. return, all counted against their quota. differs from fisheries where proven be successful method, e.g. hook line or single-species low bycatch volumes. We conclude distinguishing small numbers because there correlation between logbook data (Pearson r = 0.17). expect similar difficulty other demersal trawl volumes, when similar-looking species targeted. Meanwhile, implementing will pose challenges Limitations applicability control most common types Europe burden implementation obligation. Improved protocols technical adaptations may reduce some limitations encountered this study.