In the Wrong Place at the Wrong Time: Identifying Spatiotemporal Co-occurrence of Bycaught Common Dolphins and Fisheries in the Bay of Biscay (NE Atlantic) From 2010 to 2019

摘要: The first Unusual Mortality Event (UME) related to fishing activity along the Atlantic coast recorded by French Stranding Network was in 1989: 697 small delphinids, mostly common dolphins, washed ashore, most of them with evidence having been bycaught. Since then, UMEs dolphins have observed nearly every year Bay Biscay; unprecedented records were broken since 2016. low and unequally distributed observation efforts aboard vessels Biscay, as well lack data on foreign fisheries necessitated use complementary (such stranding data) elucidate involvement dolphin bycatch. aim this work identify positive spatial temporal correlations between likely origins bycaught stranded (estimated from a mechanistic drift model) effort statistics inferred Vessel Monitoring System >12 m long. Fisheries whose correlated positively mortality areas after 2016 included midwater trawlers, Danish seiners, gillnetters, trammel netters, Spanish bottom trawlers gillnetters. For fleet only, logbook declarations, sales, surveys carried out Ifremer integrated into data. Six fleets active bycatch at least twice 2019: gillnetters hake, netters anglerfish, pair sea bass seiners whiting. Except for changes hake landings some fisheries, there no notable total practice (gear or target species) based required ICES Council European Union that could explain large increase Small scale unrecorded modified interactions but not be detected through mandatory data-calls. recent strandings caused their distribution and/or ecology, fishery practices undetectable available