Modified Ground Gear

Modifications made to mobile fishing gear that fishes on the sea floor. An example would be the "Newhaven" spring tooth dredge, used in the Isle of Man queen scallop fishery. This dredge is wider and fishes higher off the benthos than what is typically used, and has a rubber lip instead of metal teeth (Hinz et al. 2009).

A simple technical measure to reduce bycatch and discard of skates and sharks in mixed-species bottom-trawl fisheries

Study Type: 

wild

Location: 

Minch and Stanton Banks

Target catch: 

Whitefish

Effect on bycatch species: 

Removing the 'tickler' chain resulted in decreased catches of sharks and skates

Effect on target catch: 

Catch rates for flatfish, haddock and whiting did not differ. Larger anglerfish were caught without the 'tickler' in place

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Field Study 844

Study Type: 

wild

Location: 

Venezuela

Target catch: 

shrimp

Effect on bycatch species: 

Decrease of 26-32%

Effect on target catch: 

Maintained or increased

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Field Study 804

Study Type: 

wild

Location: 

North Sea

Target catch: 

Plaice and sole

Effect on bycatch species: 

Significantly fewer invertebrates; no difference in undersized plaice; significantly fewer undersized sole

Effect on target catch: 

Significantly fewer plaice and sole

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Field Study 736

Study Type: 

wild

Location: 

Isle of Man

Target catch: 

Queen scallop

Effect on bycatch species: 

There was no significant difference in the abundance of bycatch between the traditional and new "Newhaven" dredge design.

Effect on target catch: 

The new "Newhaven" dredge caught significantly more queen scallops than the traditional dredge.

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