Effects of hook size on the catch variation, size selectivity, and bycatch of the bottom set longline fisheries targeting nemipterid fishes in the Philippines.

The use of various hook sizes exhibited highly significant differences in the catch quantities of the target fish group, the nemipterids ( p < 0.001, Table 1 ).

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The smooth-term predictions on fish catch counts and weights revealed an increasing trend transitioning from large to medium-sized hooks and a decreasing trend from medium to small hooks, with hook sizes #566 to #567 achieving peak performance in both catch counts and weights, suggesting their effectiveness in catching various fish species under the specified conditions (Figs. 1 -a and 2 -a).

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