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Tuna, albacore

Thunnus alalunga

Method of production - Caught at sea
Capture method - Troll
Capture area - North Pacific (FAO 61,71,77)
Stock area - North Pacific
Stock detail - All Areas
Certification -
Fish type - Oily fish

Sustainability rating Click for explaination of rating

This fish, caught by the methods and in the area listed above, is a good sustainable fish to eat. Click on the rating icon above to read more and on the alternatives tab below to find similar fish to eat.


Sustainability overview

The North Pacific albacore stock was last assessed in 2014. Whilst biomass reference points (relating to MSY) have not been established for the fishery, the assessment indicated that the biomass is most likely healthy, and is achieving its interim management objective to not allow stocks to fall below the average of the 10 worst historical levels. Similarly, the assessment indicated that overfishing was not occurring. Approximately 60% of the total catch is taken in surface pole and line or troll fisheries. Whilst generally targeting smaller albacore, both these methods are very selective and have very little impact on non-target species, although some monitoring and basic management of bait fish used in pole and line fisheries is needed. Pelagic longlining is associated with the bycatch of vulnerable species, such as sharks, turtles and seabirds in particular. Mitigation measures are in place yet widespread monitoring is deficient and reporting of interactions with vulnerable species is very poor. There are a number of albacore fisheries in the North Pacific that are certified as sustainable, well managed fisheries by the Marine Stewardship Council (MSC) which represent the best choice.

Commercial buyers sourcing from the longline fisheries should establish what measures the flag state is taking to improve deficiencies in monitoring and reporting - particularly of interactions with vulnerable species - and specify the need for ongoing and demonstrable improvements. Large buyers should consider supporting such improvements.

Biology

Tuna belong to the family Scombridae. They are large, oceanic fish and are seasonally migratory, some making trans-oceanic journeys. Albacore are found throughout the world's temperate, sub-tropical and tropical oceans, although they are less common in the tropics. They are found from the surface to a depth of 600m where they often form mixed schools with skipjack, yellowfin and bluefin tuna. They grow more slowly than skipjack and yellowfin tuna, reaching a maximum size of 140cm, 60kg in weight and maximum age of 15 years. Albacore mature when about 90cm length and 4-5 years old. Spawning normally occurs between January and July.

Stock information

Stock area
North Pacific

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Stock information
The North Pacific albacore fishery was last assessed by the International Scientific Committee for Tuna and Tuna-like Species in the North Pacific Ocean (ISC) in 2014. The total annual catches of North Pacific albacore peaked in 1976 at about 125,000 t, declined to about 38,000 t in 1991, and then increased to about 122,000 t in 1999. The average catch between 2009 and 2013 was approximately 81,000t. In recent years, catches have been increasing, with 92,900t reported for 2013, a 16% increase from 2012. This is approaching the estimated Maximum Sustainable Yield (MSY) of 105,571t. MSY biological reference points have not been established for this fishery due to a lack of long-term data available, however, an interim management objective to maintain the spawning stock biomass (SSB) above the average of the ten historically lowest estimated points (ATHL) with a probability greater than 50% is in place (This objective is estimated to be greater than Bmsy).

Results of the 2014 assessment indicate that the stock is not being subject to overfishing, with current fishing mortality (F2010 to 2012), at approximately 0.51Fmsy. Similarly, the biomass is estimated to be well above its management objective, indicating the stock is most likely in a healthy state and not overfished. It is noted however, that if a low recruitment scenario is assumed, the probability of the current fishing mortality reducing the biomass below its objective, increases to 65%.

Management

Most tuna stocks range across and are accessed by numerous coastal states, making harmonised and effective management of these individual stocks very difficult. As a result, intergovernmental Regional Fisheries Management Organisations (RFMOs) have been established. There are five main tuna RFMOs worldwide and it is their responsibility to carry out data collection, scientific monitoring and management of these fisheries. The responsibility for the management of Albacore in the North Pacific is shared between the Inter-American Tropical Tuna Commission (IATTC) and the Western and Central Pacific Fishery Commission (WCPFC). Whilst these RFMOs are responsible for the development of management and conservation measures, the degree to which they are implemented, monitored and enforced still varies significantly between coastal states. For this reason, it is important to choose tuna that has been caught by vessels that are well regulated by their flag state. A number of American and Canadian albacore fisheries are certified as sustainable and well managed by the Marine Stewardship Council (MSC) and represent the best options.

There is no Total Allowable Catch (TAC) set for this stock, however country set catch quotas have reportedly been adhered to since 2009. Both IATTC and WCPFC have measures in place to limit fishing effort and capacity so as not to exceed the level experienced in 2005.

Both the IATTC and WCPFC require 5% observer coverage on longliners greater than 20m.

To help address IUU, both the IATTC and the WCPFC maintain an IUU Vessel list as well as a register of large longliners that are authorised to target albacore; it is also prohibited to undertake transhipments at sea between purse seiners (Some exemptions apply) and all other transhipments need to be documented and 100% observed as part of the regional observer programme.

Capture information

Approximately 25% of the albacore in the North Pacific is caught in surface troll fisheries primarily from USA and Canada. Trolling generally targets smaller albacore which tend to stay closer to the surface. It is a labour intensive yet very selective method of fishing with virtually no impact on non-target species.

Read more about capture methods


References
Froese, R. and Pauly, D. Editors, 2013. FishBase. World Wide Web electronic publication. Available at www.fishbase.org [Accessed Nov 2013].

IATTC, 2014. Active IATTC and AIDCP Resolutions and Recommendations. Available at http://www.iattc.org/ResolutionsActiveENG.htm [Accessed Jan 2015].

ISC, 2014. Stock assessment of albacore tuna in the North Atlantic Ocean. Report of the albacore working group. 16 to 21 July, 2014. Taipei, Taiwan. Available at http://isc.ac.affrc.go.jp/pdf/ISC14pdf/Annex%2011-%20NPALB%20Stock%20Assessment%20Report_revsied%2029Aug14.pdf [Accessed Jan 2015].

ISSF, 2014. ISSF Tuna Stock Status Update, 2014: Status of the world fisheries for tuna. ISSF Technical Report 2014-09. International Seafood Sustainability Foundation, Washington, D.C., USA. Available at http://iss-foundation.org/wp-content/uploads/downloads/2014/09/ISSF-2014-09-Status-of-the-Stocks-Sept-11-BYCATCH-APPENDIX.pdf [Accessed Nov 2014].

IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. . [Accessed December 2012]. WCPFC, 2014. Scientific committee tenth regular session: summary report. 6 to 14 August 2014. Majuro, Republic of the Marshall Islands. Available at https://www.wcpfc.int/system/files/SC10%20-%20final_posted_1.docx [Last accessed Jan 2015].

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