Shark catch in pelagic longline fishery: Comparison of circle and tuna hooks

The use of circle hooks (4.3 sun and 5.2 sun) instead of standard Japanese tuna hooks (3.8 sun) on pelagic longlines, had little impact on catch rates, mortality or size composition of blue sharks.
Field Studies:

Location	Fishing gear	Reduction technique	Bycatch species	Effect on bycatch species	Catch	Effect on target catch	Type
North Pacific, Japan	Hooks-and-Lines	Circle hooks	Sharks	Little effect on catch rates, mortality or size composition	Swordfish	Not reported	In the wild