Comparison of circle hooks and J hooks in the catch rate of target and bycatch species taken in the Korean tuna longline fishery
Experiments were conducted aboard Korean pelagic longline vessels to determine if there were differences in the catch rates of target (tuna and billfish) and bycatch (sharks and other bony fish) species between 3 types of hooks; 4.0 traditional tuna hook (J-4), size 15 circle hook (C15) and size 18 circle hook (C18). Within the target group significant differences between catch rates were only found between the J-4 and C18 hooks. In the bycatch species group, significant differences were found between J4 and C15 and between J4 and C18. Overall, the large circle hook (C18)