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.

Field Study

Study Type: 

summary

Location: 

Atlantic and Pacific

Target catch: 

pelagic fishes (tuna, swordfish)

Effect on bycatch species: 

examing factors relevant to post-release mortality in sharks released from longline gear

Effect on target catch: 

not examined

Bycatch species: 

Fishing Gear: 

Field Study

Study Type: 

wild

Location: 

Central Pacific

Target catch: 

pelagic sharks and fishes

Effect on bycatch species: 

examining rates of post-release mortality from longline gear

Effect on target catch: 

examined in other research

Bycatch species: 

Fishing Gear: 

Field Study

Study Type: 

wild

Location: 

Central Pacific

Target catch: 

pelagic sharks and fishes

Effect on bycatch species: 

examining rates of post-release mortality from longline gear

Effect on target catch: 

examined in other research

Bycatch species: 

Fishing Gear: 

Field Study 815

Study Type: 

wild

Location: 

South Africa

Target catch: 

Tuna

Effect on bycatch species: 

0.439 birds/1000 hooks (night) vs. 2 birds/1000 hooks (day)

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 814

Study Type: 

wild

Location: 

South Africa

Target catch: 

Tuna

Effect on bycatch species: 

1.07 birds/1000 hooks (unweighted) vs. 0.06 birds/1000 hooks (weighted)

Effect on target catch: 

No detectable affect

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 813

Study Type: 

wild

Location: 

South Africa

Target catch: 

Tuna

Effect on bycatch species: 

Hybrid lines appeared to reduce sea bird attacks, but not statistically conclusive

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 798

Study Type: 

wild

Location: 

Scotian Shelf

Target catch: 

Swordfish

Effect on bycatch species: 

No effect

Effect on target catch: 

Significantly reduced on hooks treated with control lead (56%) and Nd/Pr (48%)

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 793

Study Type: 

wild

Location: 

Seychelles

Target catch: 

Tunas and swordfish

Effect on bycatch species: 

75% of bycatch species were caught during day sets, with lancetfish being the most common. Sharks were most common during night sets.

Effect on target catch: 

75% of market species were caught during day sets.

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 785

Study Type: 

wild

Location: 

Western North Pacific

Target catch: 

Tunas and swordfish

Effect on bycatch species: 

Number of albatross and shearwater attacks were reduced with paired tori lines. Secondary attacks were also significantly lower with paired tori lines.

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

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