1. Estimating Seabird Bycatch in Gillnet Fisheries in the Danish Øresund using Remote Electronic Monitoring
Authors: Glemarec, G. , Kindt-Larsen, L. , Larsen, F.
Bycatch in gillnet fisheries causes the death of thousands of seabirds each year
Electronic monitoring is a cost-effective solution to collect reliable data in small-scale gillnet fisheries
Goals
Assess the magnitude of bycatch of seabirds in the study area
Identify the factors that explain the observed levels of bycatch
BPUE
Number of birds per km.hour
Preliminary results
1849 days at sea analysed
9702 unique hauls recorded
623 bird bycatch identified
65% Anatidae (mostly eider duck)
16% Phalacrocoracidae (great cormorant)
15% Alcidae (common guillemot and razorbill)
<1% other species (including seagull, loon and grebe)
2% of all bycatch is not identifiable at species level
Spring - Summer
Fall - Winter
Bycatch rates
Ratio of observed seabird bycatch to fishing effort, i.e. number of birds captured per net length (km) multiplied by soak time (hour), for spring and summer (left), and for fall and winter (right)