Hooks-and-Lines

Fish are attracted to hooks-and-lines by natural or artificial bair placed on a hook, which captures the fish when it bites the bait. One or multiple lines may be used to catch pelagic, demersal, or benthic species. Different line and hook types are used depending on the target species.
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<i>Set longlines</i> are used near the ocean bottom and consist of regularly spaced shorter lines, or snoods, attached to a long main line. <i> Drifting longlines </i> have a main line kept near the surface by floats, with baited hooks attached to long snoods. <i>Trolling lines</i> are towed behind a vessel at the surface or depth, and use baited hooks or lures. <i>Vertical lines</i> are attached to a sinker and have one or multiple hooks. <i> Poles and lines</i>, consisting of a baited hook or lure attached to a pole, are the gear type most frequently used by recreational fishermen. <i>Handlines</i>, such as those used for squid jigging, are vertically weighted lines attached to bait or lures; fish are hauled up into the boat when caught.
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For more detailed information, please visit the FAO Fisheries and Aquaculture Department <a href="http://www.fao.org/fishery/geartype/109/en" target="_blank"> hooks and lines</a> web page.

Displaying 81 - 90 of 143

Study Type: 

Field study in the wild

Location: 

South Africa

Target catch: 

tuna

Effect on bycatch species: 

Catch rates of birds were higher on unweighted compared to weighted branchlines.

Effect on target catch: 

Catch rates of fish were not significantly different between the two branchline types at night or during the dawn.

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Study Type: 

Field study in the wild

Location: 

South Africa

Target catch: 

tuna

Effect on bycatch species: 

The mean total attack rate was similar for each design but diving birds attacked further astern in response to both tori line types compared to surface foraging birds. The "hybrid" line did not allow attacks by divers within 50 m but the "light" line al

Effect on target catch: 

None reported

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

Study Type: 

Field study in the wild

Location: 

Hawaii

Target catch: 

Bigeye tuna

Effect on bycatch species: 

Statistically more sickle pomfret and fewer wahoo, dolphinfish, blue marlin, striped marlin and shortbill spearfish were caught on the experimental compared to the control sets

Effect on target catch: 

No significant differences in catch rates between the two set types was found

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Bycatch species: 

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Study Type: 

Field study in the wild

Location: 

Hawaii

Target catch: 

Bigeye tuna

Effect on bycatch species: 

Catch rates on circle hooks were significantly lower than on Japanese style and "J" hooks for 16 and 8 species respectively. Fish length was significantly shorter for four species on Japanese style hooks and for three species on "J" hooks. Survival was

Effect on target catch: 

There were no significant differences in catch, catch rate or mean length for bigeye tunas. Survival was significantly higher for bigeye tuna caught on circle vs. Japanese style hooks.

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Bycatch species: 

Reduction technique: 

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Study Type: 

Field study in the wild

Location: 

Brazil

Target catch: 

tuna (pelagic) and sharks (bottom)

Effect on bycatch species: 

CPUE was significantly higher for night, blue, silky, and oceanic whitetip sharks on circle hooks.

Effect on target catch: 

None reported for pelagic longlines. On bottom longlines, CPUE was higher for blacknose and nurse sharks and southern stingrays; no CPUE difference between hook type; more tiger and blacknose sharks were alive at haulback with circle hooks

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

Study Type: 

Field study in the wild

Location: 

Australia

Target catch: 

Bigeye tuna

Effect on bycatch species: 

None reported

Effect on target catch: 

Weighted longlines had a slightly higher overall CPUE (1.3 fish/100 hooks) compared to traditional longlines (1.08 fish/100 hooks) and caught more bigeye (0.95 fish/ 100 hooks) than traditional longlines (0.56 fish/100 hooks). Catch rates were not very

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Study Type: 

Field study in the wild

Location: 

Bay of Bengal

Target catch: 

Tunas and billfish

Effect on bycatch species: 

J-hooks caught a higer percentage (74.5%) of bycatch compared to target (25.5%) species, while circle hooks caught a similar percentage of each (53.3% and 46.7% respectively). Bycatch catch rates were higher on J-hooks (5.6 individuals/1,000 hooks) than

Effect on target catch: 

Target species catch rates were higher on circle hooks (2.2 individuals/1,000 hooks) compared to J-hooks (1.9 individuals/1,000 hooks). Swordfish caught by J-hooks were slightly larger than those caught on circle hooks.

Article: 

Bycatch species: 

Reduction technique: 

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Study Type: 

Field study in the wild

Location: 

Wollongong, Australia

Target catch: 

Tuna

Effect on bycatch species: 

Blue-dyed squid bait reduced subsurface interactions with seabirds by 68%. Seabirds struck only 3-8% of surface blue-dyed squid bait compared with 75-98% of non-dyed squid bait. Birds struck 48% of blue-dyed fish bait at the surface during the first tw

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Study Type: 

Field study in the wild

Location: 

Georges Bank

Target catch: 

Swordfish

Effect on bycatch species: 

No signficant difference in catch rates between gangions for loggerhead sea turtles.

Effect on target catch: 

There were no differences in the mean length at capture, but signficantly more swordfish were caught on the monofilament gangions.

Article: 

Bycatch species: 

Reduction technique: 

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Study Type: 

Field study in the wild

Location: 

Georges Bank

Target catch: 

Swordfish

Effect on bycatch species: 

No signficant difference in catch rates between gangions for white marlin.

Effect on target catch: 

There were no differences in the mean length at capture, but signficantly more swordfish were caught on the monofilament gangions.

Article: 

Bycatch species: 

Reduction technique: 

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