Fisheries targeting yellowfin tuna occur all year around.
Hook and line is one of the best methods of fishing with regards to sustainability. This can involve one person and a rod, or alternatively using a basic winch with a line of hooks. The hook and line fishing method has little impact on the surrounding environment and the catch can be selective. For example, any fish too small, or not the right species can be placed back into the water, with limited harm. Problems with large-volume, yet unmanaged baitfish* fisheries are also associated with pole and line fisheries. *See general coverage on tuna baitfisheries: Gillett, R. E. (2012). Global study of the management of baitfisheries that support pole-and-line tuna fishing SPC Fisheries Newsletter #139 - September/December 2012
Purse seine nets are used as walls to encircle fish. After the fish are surrounded, the bottom end of the purse seine net is pulled up and closed to form a bag that traps the fish. Schooling fish such as sardine, salmon and yellowfin tuna are caught by this method. Can be unselective, particularly if used alongside Fish Aggregating Devices (FADs), where sharks, rays, turtles, dolphins and juvenile tuna can be caught.
Longlining, as the name suggests, involves long fishing lines which can be as long as 100 kilometres. Attached to them are shorter lines with baited hook tied at fixed intervals. Longlines can be set at different depths to catch different species. Pelagic longline is where the lines are set near the surface of the water to catch open water fish such as bluefin tuna, yellowfin tuna and swordfish. Bycatch is a major environmental issue in the longline fishery, especially impacting billfish, sea turtles, pelagic sharks, and seabirds. Also there are concerns about the baitfish* fisheries for the bait that is needed to catch the fish using hooks; these can be substantial and are largely unmonitored and unmanaged.
 Note that the most recent year catch is always provisional and is updated later by ISSF. For 2021-10 report, at the time of the report, the WCPFC updated the YFT catch in the Western and Central Pacific for 2018 to be 695,442 tonnes and 681,039 tonnes for 2019 (a 2% decrease).
 At the time of the latest Status of Stock Technical Report (2021-10) the catches of YFT for IATTC in the Eastern Pacific were updated to be: 252,860 in 2018 and 240,974 in 2019.
 The catches of 2018 were updated as above. At the time of latest Status of Stock Technical Report (2021-10) the catches of YFT for IOTC in the Indian Ocean were updated to be: 440,833 in 2018 and 427,239 in 2019.
 The catch figures in the Atlantic Ocean have been updated from Technical report 2020-12 to TR 2021-10 – 135,106 in 2018 vs 132,158 in 2019.