NEW REPORT! Updated Review of Bycatch

Our latest technical report meets the need for global estimates of bycatch in tropical tuna purse seine fishing

Authored by ISSF scientists Ana Justel-Rubio and Dr. Victor Restrepo, “Computing a Global Rate of Non-Target Species Catch (Bycatch) in Tropical Tuna Purse Seine Fisheries” defines “bycatch” as any catch, whether retained or discarded, that is not the main focus of tropical tuna fishing activity — so both non-target tunas and non-tuna species are considered.

The report covers 2011-2015 data and includes detailed information on:

  • Retained catch of target tunas (skipjack, yellowfin, and bigeye), bycatch rate of nontarget species expressed as a percentage of the catch, and average bycatch rates weighted by the amount of target tuna caught;
  • Retained catch of target tunas, bycatch rate of nontuna species (excludes minor tunas and bonitos) expressed as a percentage of the catch, and average bycatch rates weighted by the amount of target tuna caught.

Tables break down data by year, set type, and ocean region.

Download the report PDF on the ISSF site


NEW BLOG! Working with Fishers Worldwide

ISSF sponsored Skipper Workshops for the seventh consecutive year in 2016, convening purse seine fishers from around the world with marine scientists to listen and learn from each other about sustainable fishing. From 2009 through 2015, we presented workshops on 4 continents and in 17 countries, and more than 25 flags. We continued to broaden our horizons in 2016, welcoming new fleets to the initiative; half of the workshops were conducted with tuna fishing fleets and ports never visited before.

Thanks to the insights from the captains and crew from many countries, we have learned a great deal about how each tuna fishery and fleet works — fishers are willing to share their valuable knowledge and appreciate scientists and fishery managers taking time to hear their opinions.

Fishers are adopting many recommended sustainable practices voluntarily, even when it brings additional work to an already demanding job. In fact, many of these ideas — such as the design of non-entangling FADs and methods for releasing bycatch from deck safely and with easy-to-use equipment — emerged through direct cooperation between skippers with scientists.

Learn more in a new blog from Azti-Tecnalia’s Dr. Jefferson Murua