Field Study 723

Western North Atlantic
Target catch
Swordfish and tuna
Study Type
Field study in the wild
Effect on target catch
Circle hooks combined with mackerel bait increased swordfish catch by weight. With squid, decreased swordfish catch, increased bluefin and albacore tuna catch. Mackerel bait decreased bigeye and albacore tuna catch.
Effect on bycatch species
Circle hooks decreased loggerhead and leatherback catch; even more effective for loggerheads when combined with mackerel bait
Fishing Gear
Reduction technique