Commercial Fishing: High Bycatch

Modeled demersal and pelagic high bycatch fishing pressure.

How Was It Measured?

This Pressure represents fish caught using high bycatch gear, which includes demersal destructive (e.g. trawl), demersal non-destructive (e.g. pots, traps) and pelagic (e.g. long-lines) gear. The species-gear associations are from Watson et al. Catch data are from 2006 and were spatialized by the Sea Around Us Project into ½ degree cell resolution. These values were then summed into EEZ reporting units; when cells spanned EEZ borders, catch was divided proportionally based upon amount of area in each EEZ. Full details for this data layer are provided in Halpern et al. (2008).