How much do deep sea divers make?

Pelagic trawling is a much "cleaner" method of fishing, in that the catch usually consists of just one species. However, some cases of it have been attacked for depleting resources which are important sources of food for certain sea birds. An instance of this was the RSPB linking a population crash of sea birds in the North Sea to pelagic fishing for sand eels, which are food for many seabird species. This led to political pressure for the closure of this fishery; the seabird populations subsequently improved. However, a second population crash of seabirds which occurred with no effect on the stocks of sand eel, cast doubt on this link.