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

Authors
Macario, A.C., Islam, T., Babaran, R.P., Balsomo, A.J. and Tomiyama, T.
Year
Journal/Publisher Name
Scientific Reports
Volume (Issue #)
15(1)
Page #s
12
Contact information
Angelo C. Macario. Hiroshima University, Japan-angelomacario@zscmst.edu.ph
Ricardo P. Babaran, University of the Philippines- rpbabaran@upv.edu.ph
Summary

This study investigated 11 different longline hook sizes to increase catch of nemipterid fisheries  while reducing bycatch in the Phillippines. The largest hook demonstrated the lowest catch in count and weight, but did catch larger individual fish. Middle-sized hooks led to higher target catch, but also higher bycatch. The authors suggest that larger hooks would increase individual catch sizes and reduce bycatch, and that regulation of hook sizes is essential for for sustainable fishery management.

 

Link
https://www.nature.com/articles/s41598-025-85726-4.pdf

Field Studies

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

Study Type
Field study in the wild
Location
Philippines
Target catch
fish (nemipterid)
Effect on bycatch species
larger hook sizes yielded less bycatch
Effect on target catch
smaller hooks yieled higher catch by count and weight, but larger hooks yielded larger individual target fish
Reduction technique
Hook size
Fishing Gear
Hooks-and-Lines