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.
<br><br>
<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.
<br><br>
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 657

Study Type: 

wild

Location: 

Pacific Ocean

Target catch: 

Tuna

Effect on bycatch species: 

Blue and oceanic whitetip shark bycatch increased.

Effect on target catch: 

Tuna catches were significantly higher, but lengths for bigeye and skipjack were smaller; shortbill spearfish and striped marlin catch was lower; no difference in swordfish catch rates, but lengths were greater

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 654

Study Type: 

wild

Location: 

South Africa

Target catch: 

Tuna

Effect on bycatch species: 

Weighted branch lines with hybrid streamer lines reduced seabird mortalities by 86% compared to unweighted branch lines.

Effect on target catch: 

No effect

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 652

Study Type: 

wild

Location: 

Southern Ocean

Target catch: 

Southern bluefin tuna

Effect on bycatch species: 

The use of both tori-lines and blue-dyed bait (squid and fish) resulted in no interactions with seabirds

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 651

Study Type: 

wild

Location: 

Southern Ocean

Target catch: 

Southern bluefin tuna

Effect on bycatch species: 

Decreased bycatch

Effect on target catch: 

The CPUE of the target southern bluefin tuna was reduced, except when blue-dyed fish bait was used.

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 646

Study Type: 

wild

Location: 

South Pacific

Target catch: 

Southern bluefin tuna

Effect on bycatch species: 

No difference in seabird avoidance between the two types ("WCPFC type and "Light type") of tori-lines

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study

Study Type: 

wild

Location: 

Western North Pacific

Target catch: 

None reported

Effect on bycatch species: 

Tori-line light streamer reduced bait-taking behavior and bycatch of seabirds compared to the tori line

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 629

Study Type: 

wild

Location: 

North Pacific Ocean

Target catch: 

None reported

Effect on bycatch species: 

In experiement 1, the mean number of seabirds appearing and the catch per unit effort (for seabirds) was not statistically different between the four tori-lines. In experiment 2, seabird attack rates (Laysan albatross and shearwater) were not statistic

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 613

Study Type: 

wild

Location: 

Eastern Australia

Target catch: 

Tuna

Effect on bycatch species: 

Live bait sank more quickly than dead bait, increasing the exposure of hooks to seabirds but the sink rates of individual live bait species were very variable. With respect to dead bait, those on the 160 g leaded swivel with a distance of 2 m leader len

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study

Study Type: 

wild

Location: 

Eastern Australia

Target catch: 

Tuna

Effect on bycatch species: 

Mainlines with a loose configuration reached depth more slowly than tight configurations, allowing more time for seabirds to become incidentally hooked

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Pages