Longline Fishing  for Giant Tuna : BluefinTuna, Big Eye Tuna & Swordfish

The longline used for tuna fishing is made up of units (sometimes known as “baskets“), each of which consists of a main horizontal line about 250 to 800 m long with 4 to 15 branch-lines, each with a wire leader and a hook. The depth where the hooks are set in the water column is a crucial element, this depth in which the longline is settled can be regulated mainly by modifying the intervals of the main line between float lines and partially by adjusting the length of float-line and/or the speed of shooting, to a lesser extent, by modifying the length of the branch-lines.

longline basket set for Large pelagic; tuna, swordfish ; main line, branch, hook, swivel,singker, nylon monoline, wire leader, look, snap, snape with swivel, vinil spring

Longline Vessel Overview

Industrial tuna longliners are usually large vessel with length ranging between 30 and 70 m. The basic requirements of a tuna longliner, industrial type, are: adequate speed to reach far away fishing grounds, enough autonomy (fuel, water, accommodation of crew, etc.), capacity for (more…)