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Stock assessments are quantitative estimates of the status (abundance) of the fish stocks and of the intensity of fishing upon them. Assessments underpin the scientific advice for management that is provided by the Standing Committee on Research and Statistics to the Commission: They aim at evaluating the sustainability of current and proposed future harvest practices in light of the Commission's objective to maintain the populations at a level that permits their maximum sustainable catch. The species Executive Summaries and Detailed Reports of stock assessments prepared by the SCRS can be downloaded from this site. Readers are warned that the concusions reached from a stock assessment can depend on a number of factors such as the available data, the various hypotheses examined and the assumptions made during analysis.


SPECIES Last / Next assessment Reports Images
YFT Yellowfin Tuna
Thunnus albacares
2016 /2020 Summary
Detailed
Yellowfin B/W drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Bigeye Tuna
Thunnus obesus
2015 /2018 Summary
Detailed
Bigeye being caught
(Courtesy of J.C. Santana Fernandez, IEO Canarias)
Bigeye Drawing
(Courtesy of the FROM, Secretaría General de Pesca Marítima, Spain)
Bigeye B/W drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Bigeye color drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Skipjack Tuna
Katsuwonus pelamis
2014 /2019 Summary
Detailed
Skipjack Picture
(Courtesy of J.C. Santana Fernandez, IEO Canarias)
Skipjack Drawing
(Courtesy of the FROM, Secretaría General de Pesca Marítima, Spain)
Skipjack color drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Albacore
Thunnus alalunga
ATL 2016 / 2020

MED 2017 / 2021
Detailed
Detailed
Summary
Albacore color drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Atl. Bluefin Tuna
Thunnus thynnus t.
2017 /2020 Summary
Detailed
Bluefin color drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Southern Bluefin
Thunnus maccoyii
N/A
(assessed by CCSBT)
Report  
Swordfish Atl.
Xiphias gladius
2017 / 2021 Summary
Detailed
Swordfish color drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Swo-Mediterranean 2016 / 2019 Summary
Detailed
 
Sailfish
Istiophorus albicans
2016 / 2022* Summary
Detailed
Sailfish Drawing
(Courtesy of the FROM, Secretaría General de Pesca Marítima, Spain)
Blue Marlin
Makaira nigricans
2011 / 2018 Summary
Detailed
Blue Marlin Drawing
by Les Gallagher (Les Gallagher: fishpics)
White Marlin
Tetrapturus albidus
2012 / 2019* Summary
Detailed
White Marlin Drawing
by Les Gallagher (Les Gallagher: fishpics)
Small Tunas
(various)
NA / TBD Summary
Detailed
Atlantic bonito Drawing
Bullet tuna Drawing
Frigate tuna Drawing
King mackerel Drawing
Little tuna Drawing
Atlantic Spanish Mackerel Drawing
by A. López, (‘Tokio’)
Pelagic sharks
Prionace glauca
Isurus oxyrinchus
Lamna nasus
2015 / 2021*
2017 / 2019
2009 / TBD
Summary
Detailed (BSH)
Detailed (SMA)
Detailed (POR)
Blue shark Drawing
Shortfin mako shark Drawing
Portbeagle Drawing
by A. López, (‘Tokio’)

* Provisional date, subject to the Commission decision.
TBD-To be decided