Novel bait species

Changing the type of bait, such as switching from squid to mackerel, to deter non-target animals (such as sea turtles) that prefer one type of bait versus another.

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Study Type: 

Field study in the wild


Western North Atlantic

Target catch: 

Swordfish and tuna

Effect on bycatch species: 

Circle hooks decreased loggerhead and leatherback catch; even more effective for loggerheads when combined with mackerel bait

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.