Dyed bait

Bait dyed blue to reduce its visibility to non-target species such as seabirds hovering around longlines as baited hooks are deployed.

Food color and marine turtle feeding behavior: Can blue bait reduce turtle bycatch in commercial fisheries?

Study Type: 

wild

Location: 

Costa Rica

Target catch: 

swordfish and tuna

Effect on bycatch species: 

Reduced interactions

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Field Study 652

Study Type: 

wild

Location: 

Southern Ocean

Target catch: 

Southern bluefin tuna

Effect on bycatch species: 

The use of both tori-lines and blue-dyed bait (squid and fish) resulted in no interactions with seabirds

Effect on target catch: 

None reported

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Field Study 651

Study Type: 

wild

Location: 

Southern Ocean

Target catch: 

Southern bluefin tuna

Effect on bycatch species: 

Decreased bycatch

Effect on target catch: 

The CPUE of the target southern bluefin tuna was reduced, except when blue-dyed fish bait was used.

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Field Study 365

Study Type: 

wild

Location: 

Wollongong, Australia

Target catch: 

Tuna

Effect on bycatch species: 

Blue-dyed squid bait reduced subsurface interactions with seabirds by 68%. Seabirds struck only 3-8% of surface blue-dyed squid bait compared with 75-98% of non-dyed squid bait. Birds struck 48% of blue-dyed fish bait at the surface during the first tw

Effect on target catch: 

None reported

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Field Study 359

Study Type: 

wild

Location: 

East Cape, New Zealand

Target catch: 

Bigeye tuna

Effect on bycatch species: 

Results were inconclusive

Effect on target catch: 

No signficiant effect reported for individual species and when all species were combined the results were inconclusive

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Experiments in the Western Atlantic Northeast Distant Waters to Evaluate Sea Turtle Mitigation Measures in the Pelagic Longline Fishery. Report on Experiments Conducted in 2001

Study Type: 

wild

Location: 

Atlantic

Target catch: 

Swordfish and tuna

Effect on bycatch species: 

Did not reduce bycatch

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