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2. Gillnetting - Wikipedia

   en.wikipedia.org/wiki/Gillnetting

   Net haulers are usually used to set and haul driftnets, with a drifter capstan on the forepart of the vessel. In developing countries most nets are hauled by hand. The mesh size of the gillnets is very effective at selecting or regulating the size of fish caught. The drift net has a low fuel/fish energy consumption compared to other fishing gear.

3. Fishing net - Wikipedia

   en.wikipedia.org/wiki/Fishing_net

   Surrounding net: A surrounding net surrounds fish on all sides. It is an evolution of the seine, and is typically used by commercial fishers. [32] Tangle net: Tangle nets, also known as tooth nets, are similar to gillnets except they have a smaller mesh size designed to catch fish by the teeth or upper jaw bone instead of by the gills. [33] Trammel

4. Surrounding net - Wikipedia

   en.wikipedia.org/wiki/Surrounding_net

   A surrounding net is deployed by a fishing boat that starts sailing in a circle. This allows for the net to come all the way around 360 degrees to completely surround the fish. This makes it so that there is no escape for the fish. There are floating buoys on the top of the net and weights on the bottom of the net to make sure that it forms a wall.

5. Trawling - Wikipedia

   en.wikipedia.org/wiki/Trawling

   In fish trawls, the grid is mounted so the smallest organisms (juvenile fish, shrimp) pass through the grid and enter the sea again. In shrimp trawls, the grid pushes the largest organisms (fish) through a hole in the roof of the net, reducing by-catch of fish. The latter type of grid is mandatory in Norway and has been in use for 20 years. [11]

6. Bottom trawling - Wikipedia

   en.wikipedia.org/wiki/Bottom_trawling

   The design requirements of a bottom trawl are relatively simple, a mechanism for keeping the mouth of the net open in horizontal and vertical dimensions, a "body" of net which guides fish inwards, and a "cod-end" of a suitable mesh size, where the fish are collected. The size and design of net used is determined by the species being targeted ...

7. Copper alloys in aquaculture - Wikipedia

   en.wikipedia.org/wiki/Copper_alloys_in_aquaculture

   [24] [25] This translates, for example, to two thousand pounds of unwanted organisms adhered to what was once a clean 10-pound fish pen net. In South Australia, biofouling weighing 6.5 tonnes (approximately 13,000 pounds) was observed on a fish pen net. [26] This extra burden often results in net breakage and additional maintenance costs.