Field Study 570

South-western Atlantic Ocean

Target catch: 

Tuna, blue sharks, swordfish

Study Type: 

Field study in the wild

Effect on target catch: 

Catch rates of targeted species including bigeye and albacore tuna and blue sharks were increased with the use of circle hooks, while no difference was found for yellowfin tuna, shortfin mako or hammerhead sharks or for dolphinfish.

Effect on bycatch species: 

The incidental capture of loggerhead sea turtles was reduced by 55% and for leatherback sea turtles by 65% when circle hooks were used.

Bycatch species: 

Fishing Gear: 

Reduction technique: