by Fortheboyz,
| Fishing Method Pole and Line |  |
|---|---|
| - can be operated by hand or like a winch - method is common to sport fisheries - also used in commercial fisheries - the use of this method has minimal negative impact - the recommended choice of Greenpeace | How its done: -a group of target fish is located -water is sprayed from the back of the fishing vessel and small bait fish (sardines) are scattered onto the surface of the water -tuna will think that it is a live school of prey fish and be attracted - fish is hooked and flicked up and over the head of the fisherman and onto the deck. |
| Fishing Method Longline (Considered ideal for catching Albacore, Bigeye and Yellowfin) |  |
|---|---|
| - fishing boats trail a long line of baited hooks - fishing lines can be miles long, with thousands of baited hooks. - hooks can catch non target fish like swordfish, sharks - also may catch other marine life like sea turtles, albatrosses (birds), and dolphins - this fishing method requires careful management or there could be a lot of bycatch (The picture to the right shows a Bigeye thresher caught by longline.) |  Public Domain Photo Source by a NOAA Observer. https://de.m.wikipedia.org/wiki/Datei: Alopias_superciliosus_bycatch.jpg |
| Fishing Method Purse Seine |  |
|---|---|
| LOCATING TUNA: -fishermen locate a free-swimming school of tuna - may use aircraft or high-tech fish finders that locate fish underwater -some fishermen set the net around floating objects, (e.g., logs or seaweed), or around man-made structures called fish aggregating devices or FADs. -when FADs are used it causes greater bycatch -sometimes a fast swimming school of dolphins is targeted to find tuna since they are known to swim together | HOW ITS DONE: -once a large school of fish is found , a purse like net closes up (drawstring purse), capturing the fish -fishermen pull the net on to the vessel, so they can collect their catch. -It is an efficient way to fish for the fishermen because lots of fish are caught -purse seining around FADs tends to scoop up more bycatch compared to free-school purse seining -bycatch includes dolphins, turtles, sharks and immature tuna that hasn’t had a chance to reproduce as well as and other species or fish -when fishermen use purse seines the right way – to target a tightly knit school of free-swimming tuna – it is an efficient fishing method -but purse seines fishing can be harmful if used with fish aggregating devices or when dolphins are targeted to catch tuna |
| FISHING METHOD Gillnet FISHING |  |
|---|---|
| - A gillnet is a wall of netting that hangs in the water - when using gillnets their is the risk of bycatch amoung all species of fish -research shows that sharks are very vulnerable -turtle mortality is high because of gillnets operating in the Indian Ocean | - gillnets have minimum seabird bycatch - the size of fish caught in the net, depends on the net mesh size -having a large mesh size allows juvenile or small fish to escape -fish die because the net closes on their gills and then they suffocate |
International Seafood Sustainability Foundation (ISSF) Fishing Methods Overview
The ISSF believes that all fishing methods have advantages as well as areas of concern. . And all can be improved. This site gives key statistics, By Catch information and the fuel efficiency of each fishing method. <https://iss-foundation.org/about-tuna/fishing-methods/>
Marine Steward Council. Fishing methods and gear types
<https://www.msc.org/what-we-are-doing/our-approach/fishing-methods-and-gear-types>
Fishing Gear 101 blog series. by Elizabeth Brown. 2016
Purse Seines – The Encirclers <http://safinacenter.org/2015/12/fishing-gear-101-purse-seines-the-encirclers/> Some good information on the potential dangers of FAD’s
The Truth About FADs (Fish Aggregating Devices)
When FAD is used it causes greater bycatch (see https://www.youtube.com/watch?v=VVbp7PijR6Y)