Trap-net modification

[Description pending]

Reducing bycatch in coral reef trap fisheries: escape gaps as a step towards sustainability

Study Type: 

wild

Location: 

Curacao

Target catch: 

Groupers and snappers

Effect on bycatch species: 

Short and tall gap traps reduced bycatch of bycatch fish by 74% and 80%, key herbivores by 58% and 50% and butterflyfish by 90% and 98%, respectively.

Effect on target catch: 

Catches of high-value fish were not affected

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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: 

Lake Opinicon, Canada

Target catch: 

sunfish, bullheads, yellow perch, rock bass, black crappie

Effect on bycatch species: 

60% of turtles escaped through large hole in net

Effect on target catch: 

77% of fish escaped through large hole in net

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Field Study

Study Type: 

wild

Location: 

Lake Opinicon, Canada

Target catch: 

sunfish, bullheads, yellow perch, rock bass, black crappie

Effect on bycatch species: 

All turtles escaped from the chimney opening

Effect on target catch: 

Retained 88% of target catch

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Field Study

Study Type: 

wild

Location: 

Missouri, United States

Target catch: 

Freshwater fish

Effect on bycatch species: 

Modified net captured significantly fewer turtles

Effect on target catch: 

No difference

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Field Study 194

Study Type: 

wild

Location: 

Baltic Sea

Target catch: 

Salmon and whitefish

Effect on bycatch species: 

Reduced interactions with gear

Effect on target catch: 

Target catch remained same or increased in 4 of 5 modified traps.

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