The experimental trials of line weighting options for reduction of incidental mortality of seabirds in Korean tuna longline vessels

Location
South Atlantic Ocean, Indian Ocean
Article
The experimental trials of line weighting options for reduction of incidental mortality of seabirds in Korean tuna longline vessels
Target catch
Southern bluefin tuna (T. maccoyii), albacore tuna (T. alalunga), yellowfin tuna (T. albacares)
Study Type
Field study in the wild
Effect on target catch
For southern bluefin and yellowfin tuna, no significant effect. For albacore, catch rate significantly decreased
Effect on bycatch species
Unweighted branch lines (control) caught more than twice the number of seabirds compared to weighted branch lines
Bycatch species
Seabirds
Fishing Gear
Hooks-and-Lines
Reduction technique
Alternative leader design