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  2. Trawling - Wikipedia

    en.wikipedia.org/wiki/Trawling

    The gear itself can vary a great deal. Pelagic trawls are typically much larger than bottom trawls, with very large mesh openings in the net, little or no ground gear, and little or no chaffing gear. Additionally, pelagic trawl doors have different shapes than bottom trawl doors, although doors that can be used with both nets do exist.

  3. Longline fishing - Wikipedia

    en.wikipedia.org/wiki/Longline_fishing

    Longlines can be set to hang near the surface (pelagic longline) to catch fish such as tuna and swordfish or along the sea floor (demersal longline) for groundfish such as halibut or cod. Longliners fishing for sablefish , also referred to as black cod, occasionally set gear on the sea floor at depths exceeding 1,100 metres (3,600 ft) using ...

  4. Fishing techniques - Wikipedia

    en.wikipedia.org/wiki/Fishing_techniques

    Wild fish catch by gear type, World. Among the major fishing techniques bottom trawling is a destructive one. Fishing techniques are methods for catching fish. The term may also be applied to methods for catching other aquatic animals such as molluscs (shellfish, squid, octopus) and edible marine invertebrates.

  5. Trolling (fishing) - Wikipedia

    en.wikipedia.org/wiki/Trolling_(fishing)

    Artist's conception of tuna trolling operation, using outriggers to tow multiple trolling lines and give the appearance of schooling fish. Trolling is a method of fishing where one or more fishing lines, baited with lures or bait fish, are drawn through the water at a consistent, low speed.

  6. Midwater trawling - Wikipedia

    en.wikipedia.org/wiki/Midwater_trawling

    Midwater (pelagic) otter trawl 1: trawl warp, 2: otter boards, 3: longline chains, 4 hunter, 5: weights 6: headline with floats, 7: pre-net, 8: tunnel and belly, 9: codend Midwater trawling is trawling , or net fishing, at a depth that is higher in the water column than the bottom of the ocean.

  7. Demersal zone - Wikipedia

    en.wikipedia.org/wiki/Demersal_zone

    The distinction between demersal species of fish and pelagic species is not always clear cut. The Atlantic cod (Gadus morhua) is a typical demersal fish, but can also be found in the open water column, and the Atlantic herring (Clupea harengus) is predominantly a pelagic species but forms large aggregations near the seabed when it spawns on banks of gravel.

  8. Skipjack tuna - Wikipedia

    en.wikipedia.org/wiki/Skipjack_tuna

    It is a streamlined, fast-swimming pelagic fish common in tropical waters throughout the world, where it inhabits surface waters in large shoals (up to 50,000 fish), feeding on fish, crustaceans, cephalopods, and mollusks. It is an important prey species for sharks and large pelagic fishes and is often used as live bait when fishing for marlin ...

  9. Pelagic zone - Wikipedia

    en.wikipedia.org/wiki/Pelagic_zone

    Altogether, the pelagic zone occupies 1,330 million km 3 (320 million mi 3) with a mean depth of 3.68 km (2.29 mi) and maximum depth of 11 km (6.8 mi). [2] [3] [4] Pelagic life decreases as depth increases. The pelagic zone contrasts with the benthic and demersal zones at the bottom of the sea. The benthic zone is the ecological region at the ...

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