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Displaying 131 - 140 of 568
| Location | Gear | Catch | Technique | Bycatch species | Type | Results |
|---|---|---|---|---|---|---|
Strait of Sicily |
Hooks-and-Lines
|
Swordfish |
Circle hooks
|
Caretta caretta (Loggerhead turtle) | Field study in the wild | The use of circle hooks (16/0) instead of J hooks (size 2) on pelagic longline gear, reduced the incidental capture of immature loggerhead sea turtles and did not affect the catch rates or fish size of the target species. There was also a significant difference in hook location between the two hooks, with more J hooks being swallowed. Circle hooks reduced the incidental capture of immature sea turtles |
Northeastern Australia |
Hooks-and-Lines
|
Bigeye and yellowfin tuna |
Alternative leader design
|
Sharks | Field study in the wild | Catch rates of blue marlin, snake mackerel and sharks were lower when nylon monofilament leaders, instead of wire leaders, were used on pelagic longline gear but bigeye tuna and black marlin catch rates increased. (No effect on yellowfin). Nylon leaders also had higher bite-off rates than the wire leaders. Wire leaders had higher catch rates of sharks when compared to nylon monofilament leaders |
Australia |
Trawls
|
Tiger prawn |
Excluder devices
|
Sea Snakes | Field study in the wild | The yarrow fisheye bycatch reduction device reduced the weight of small bycatch by an average of 22.7% and the number of seasnakes caught by an average of 43.3%, with no loss of tiger prawn. reduced mean weight of small bycatch and mean number of seasnakes caught |
Florida |
Traps
|
Blue crabs |
Trap guards (T-bars, otter guards)
|
Terrapins | Field study in the wild | This study determined that 73.2% of diamondback terrapins could have been prevented from entering crab pots if bycatch reduction devices (BRDs) had been used. Additionally, there was no significant difference in the sex, size or number of crabs in pots fitted with BRDs. The use of bycatch reduction devices would reduce incidental capture of diamondback terrapins |
Western Australia |
Trawls
|
red emperor, scarlet perch, spangled emperor, Rankin cod, blue spot emperor, rosy threadfin brea, flagfish, frypan snapper, red snapper and goldband snapper |
Excluder devices
|
Small Cetaceans (maximum length < 7.5 meters) | Field study in the wild | A semi-flexible exclusion grid with a bar spacing of 15.5 cm reduced dolphin bycatch in the Pilbara trawl fishery by close to 50% and reduced the bycatch of sea turtles, large sharks and rays. However, the fate of the dolphins that encountered the grid and escaped is unknown. Reduced dolphin bycatch by almost 50% and reduced bycatch of sea turtles, large sharks and large rays |
Norway |
Hooks-and-Lines
|
Torsk (Brosme brosme), ling (Molva molva) and haddock (Melanogrammus aeglefinus) |
Bird-scaring devices
|
Seabirds | Field study in the wild | Bird-scaring lines, underwater setting and line shooters all reduced the incidental capture of seabirds, with bird-scaring lines being the most effective. These mitigation measures also reduced bait loss and increased the catch rates of target species. Reduced incidental capture of seabirds, mostly fulmars |
Norway |
Hooks-and-Lines
|
Torsk (Brosme brosme), ling (Molva molva) and haddock (Melanogrammus aeglefinus) |
Sub-surface sets (gillnets)
|
Seabirds | Field study in the wild | Bird-scaring lines, underwater setting and line shooters all reduced the incidental capture of seabirds, with bird-scaring lines being the most effective. These mitigation measures also reduced bait loss and increased the catch rates of target species. Reduced incidental capture of seabirds, mostly fulmars |
Norway |
Hooks-and-Lines
|
Torsk (Brosme brosme), ling (Molva molva) and haddock (Melanogrammus aeglefinus) |
Sub-surface bait setting
|
Seabirds | Field study in the wild | Bird-scaring lines, underwater setting and line shooters all reduced the incidental capture of seabirds, with bird-scaring lines being the most effective. These mitigation measures also reduced bait loss and increased the catch rates of target species. Reduced incidental capture of seabirds, mostly fulmars |
Pamlico Sound, North Carolina |
Gillnets
|
flounder |
Low profile gillnet
|
Sea Turtles | Field study in the wild | Low profile gillnets with a panel height of six feet and no tie downs or additional floats had significantly fewer interactions with sea turtles and caught significantly less bycatch than standard gillnets. Catches of the target species (flounder) were also reduced in the low profile gillnets. Reduced incidental capture of sea turtles and bycatch species |
Pamlico Sound, North Carolina |
Gillnets
|
flounder |
Sub-surface sets (gillnets)
|
Sea Turtles | Field study in the wild | Low profile gillnets with a panel height of six feet and no tie downs or additional floats had significantly fewer interactions with sea turtles and caught significantly less bycatch than standard gillnets. Catches of the target species (flounder) were also reduced in the low profile gillnets. Reduced incidental capture of sea turtles and bycatch species |