Bony Fishes

Field Study 791

Study Type: 

wild

Location: 

Gulf of Maine

Target catch: 

Pink shrimp

Effect on bycatch species: 

Atlantic herring bycatch decreased 86.6%; flounder spp. bycatch increased by <3%

Effect on target catch: 

Increased 13.5%

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Field Study 782

Study Type: 

wild

Location: 

Nantucket Sound

Target catch: 

Loligo squid

Effect on bycatch species: 

The two extensions were able to remove scup at mean rates of 86-100% , although small (<10 cm FL) scup were not excluded. No difference in removal rates between the two extensions.

Effect on target catch: 

The vee excluder removed more squid (53-69%) from the net compared to the ring excluder (7-58%).

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Field Study 769

Study Type: 

wild

Location: 

Papua New Guinea and Solomon Islands

Target catch: 

Skipjack and yellowfin tuna

Effect on bycatch species: 

Double-FADS caught larger bigeye tunas but the catch rate was slightly less than on normal FAD sets.

Effect on target catch: 

Fewer skipjack tuna were caught by number and weight. Yellowfin tuna catch was higher.

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Field Study 707

Study Type: 

wild

Location: 

British Columbia, Canada

Target catch: 

Spot prawn

Effect on bycatch species: 

Elimination of rockfish bycatch. Drastic reduction in number and size of other fish caught

Effect on target catch: 

~40% reduction of prawn catch

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Field Study

Study Type: 

wild

Location: 

Western and Central Pacific Ocean

Target catch: 

Tuna

Effect on bycatch species: 

Only two out of 105 silky sharks were able to escape through the release panel. No finfish species escaped.

Effect on target catch: 

None reported

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Field Study

Study Type: 

wild

Location: 

Eastern Pacific Ocean

Target catch: 

Billfish and tuna

Effect on bycatch species: 

Significant differences were found between J4 and C15 and between J4 and C18.

Effect on target catch: 

Significant differences between catch rates were only found between the J-4 and C18 hooks. Large circle hooks (C18) had the lowest catch rates for tunas and small circle hooks (C15) had the lowest catch rates for billfish

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Field Study 641

Study Type: 

wild

Location: 

Gulf of Maine

Target catch: 

Pink shrimp (Pandalus borealis)

Effect on bycatch species: 

Reduced the bycatch of silver hake, red hake, American plaice and witch flounder compared to the Nordmore Grid and allowed larger fish to escape

Effect on target catch: 

The catch and size of pink shrimp was not significantly different between the Nordmore Grid and Rope Grid

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