Traps

Traps are baited or nonbaited stationary devices set on the bottom or, less frequently, in midwater. Fish enter the trap freely but are subsequently prevented from leaving. Large traps are more common in coastal waters while smaller traps may be deployed to greater depths.
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<i>Pots</i> consists of cages or baskets used to target shellfish, cephalopods, crustaceans, and reef fish. Pots are placed in multiple sets and the location of each pot is marked with a surface buoy. <i>Fyke nets</i> and <i>stow nets</i> are fixed to the bottom and rely on currents to bring fish into contact with them. Additionally, fyke nets use "wings" to guide the fish into mesh bags, where they are captured. Both types are most commonly set near shore. <i>Barriers, weirs, fences</i> and <i>corrals</i> are used in tidal areas and span the entirety of the water column. Fish enter through a narrow opening and are then trapped in a holding compartment.
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For more detailed information, please visit the FAO Fisheries and Aquaculture Department <a href="http://www.fao.org/fishery/geartype/108/en" target="_blank"> traps </a> web page.

Fishing gear threat to right whales (Eubalaena glacialis) in Canadian waters and the risk of lethal entanglement

Study Type: 

summary

Location: 

Bay of Fundy and Scotian Shelf

Target catch: 

crab, hagfish, lobster

Effect on bycatch species: 

Lobster traps pose greatest threat during spring and summer migration periods (to/from Critical Habitat)

Effect on target catch: 

N/A

Article: 

Fishing Gear: 

Bycatch species: 

Review of sinking groundline performance in the Maine lobster fishery, with recommendations for improving its fishability.

Study Type: 

summary

Location: 

Northwest Atlantic

Target catch: 

Lobster

Effect on bycatch species: 

N/A

Effect on target catch: 

N/A

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Acoustically triggered buoyless lobster trap recovery system

Study Type: 

lab

Location: 

Northwest Atlantic

Target catch: 

Lobster

Effect on bycatch species: 

Not tested

Effect on target catch: 

Not tested

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Effectiveness of mitigation measures to reduce interactions between commercial fishing gear and whales

Study Type: 

summary

Location: 

Western Australia

Target catch: 

N/A

Effect on bycatch species: 

Preliminary results suggest pingers made no difference to Humpback whale behavior

Effect on target catch: 

N/A

Article: 

Fishing Gear: 

Bycatch species: 

Implications of fishing rope strength on the severity of large whale entanglements

Study Type: 

wild

Location: 

US east coast and Canadian Maritimes

Target catch: 

Various

Effect on bycatch species: 

Ropes with a breaking strength of 1,700 lbs or less could reduce life-threatening entanglements of North Atlantic Right whales by at least 72%. Right and humpback were entangled in ropes with stronger breaking strength than those involving minke whales.

Effect on target catch: 

N/A

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Assessments of vision to reduce right whale entanglements

Study Type: 

wild

Location: 

Cape Cod Bay

Target catch: 

N/A

Effect on bycatch species: 

There was a significant difference in first change in behavior between black and green ropes and red and orange ropes.

Effect on target catch: 

N/A

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Taut vertical line and North Atlantic right whale flipper interaction: Experimental observations

Study Type: 

wild

Location: 

Maine

Target catch: 

N/A

Effect on bycatch species: 

Interactions between the vertical line and the leading edge of a whale flipper model closest to the whale "body" resulted in significant damage to the flipper.

Effect on target catch: 

N/A

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

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

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Seal exclusion devices in cod pots prevent seal bycatch and affect their catchability of cod

Study Type: 

wild

Location: 

Swedish coast

Target catch: 

Cod

Effect on bycatch species: 

Reduced sea bycatch to zero

Effect on target catch: 

Oval shaped SEDs and ones with larger rectangle opening increased catchability of pots

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

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