Bycatch of marine mammals and seabirds in gillnet fisheries is a hazard for conservation globally. This dissertation considered the case of the German gillnet fleet in the Baltic Sea to generate an understanding of fishers social practices to inform bycatch mitigation management. As a result of qualitative methods, I identified 3 types of fishers´ agency and 2 forms of bycatch practices, differing between normalizing seabird bycatch and non-normalizing bycatch of marine mammals. I discussed the results in light of fisheries management and derived recommendations for management measures.<fre>
