There are three main types of fishing technique employed by the Mediterranean fishing industries which cause the incidental capture of sea turtles. They are long-line fishing, trawl-net fishing and drift-net or gill-net fishing.
- Long-line fishing: each
fishing unit consists of a floating 'mother-line', 300m long, from
which hang the hooked 'groundlines', each 25m long, at 20m intervals.
- Units can be strung together
in great chains. It is not unusual for 200 units to be strung together
to reach a length of 60Km. This method of fishing is usually used
to catch Swordfish and Albacore in the Mediterranean.
- Trawl net fishing is
where a boat drags behind it an enclosed net. The net forms a sock
shaped enclosure catching any matter that enters it. The mesh of
the trawl net tends to be very small as this type of fishing is
primarily used for shrimping. The picture below shows the apparatus
used for trawl net fishing.
- Drift-net or gill-net fishing involves the use of huge net. The net is essentially an area of mesh; it is not fixed into any assembly.. The mesh of the net is just large enough to allow the heads of the fish to pass through while trapping them at their gills. The net is usually dragged behind a single boat in a loop or may be fastened to two boats on a parallel course. This type of fishing is usually used to catch Tuna, Swordfish and Albacore. Below is a diagram explaining how a drift-net is used.