August 8, 2019 — The following was released by the International Seafood Sustainability Foundation:
The International Seafood Sustainability Foundation (ISSF) has issued an updated “snapshot” of Large-Scale Tuna Purse Seine Fishing Fleets report as of June 2019. The total number of purse seinevessels, calculated based on data from the five tuna Regional Fisheries Management Organizations (RFMOs), has decreased from 1,871 in 2018 to 1,843 today, mainly due to the removal from RFMO lists of vessels under 24m that are now inactive.
Having an accurate estimate of active vessels is critical for managing tuna fishing capacity regionally as well as globally. Although purse seine vessels account for approximately 65 percent of the 4.9-million-tonne global tuna catch, multiple databases must be searched to count all authorized purse seine vessels. To provide an annual best estimate — and to track capacity changes from year to year — ISSF analyzes and aggregates information from the five tuna RFMOs and other sources. As the report explains, these figures may underestimate the total fleet, because many small-scale purse seiners or purse seiners operating in only one exclusive economic zone (EEZ) do not have to be listed on RFMOs’ records of authorized fishing vessels.
Through its research, ISSF found that in the tropical tuna large-scale purse seine (LSPS) fleet, fish hold volume (FHV) grew by 1 percent since 2018. The report shows approximately 686 vessels (up 2 percent, from 673 last year) defined as large-scale purse seine (LSPS) vessels targeting tropical tuna species (skipjack, yellowfin, and bigeye), with a combined fishing capacity of over 860,000 m3. The increase is not all due to new vessel constructions, but also to the addition to RFMO lists of older vessels that were not listed in the past. These vessels may have been inactive for some time or participating in a different fishery, but this type of information is not readily available.