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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 Assessment model(s)
used for advice
Reports Images
YFT Yellowfin Tuna
Thunnus albacares
2019 / 2023* Stock Synthesis (V3.30.13.09),
JABBA (v1.5 Beta) and mpb (FLR)
Summary
Detailed
Yellowfin B/W drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Bigeye Tuna
Thunnus obesus
2018 / 2021 Stock Synthesis (V3.24P) 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 / 2021* West Atlantic:
ASPIC (v5.3.4)
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
North Atlantic:
mpb (FLR)

South Atlantic
:
ASPIC (v5.34) and BSP
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 East Atlantic and Mediterranean Sea:
VPA2box (V4.01)

West Atlantic:
VPA2box (V4.01) and Stock Synthesis (V3.24P)
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)
N/A Report  
Swordfish Atl.
Xiphias gladius
2017 / 2021 North Atlantic:
BSP and Stock Synthesis (V3.24AC)

South Atlantic
:
JABBA (v1.0)
Summary
Detailed
Swordfish color drawing
(Image owned and copy-righted by the Inter-American Tropical Tuna Commission, IATTC)
Swo-Mediterranean 2016 / 2020 XSA (FLR) Summary
Detailed
 
Sailfish
Istiophorus albicans
2016 / 2022* East Atlantic:
BSP and Stock Reduction Analysis

West Atlantic
:
Stock Synthesis
Summary
Detailed
Sailfish Drawing
(Courtesy of the FROM, Secretaría General de Pesca Marítima, Spain)
Blue Marlin
Makaira nigricans
2018 / 2024 Stock Synthesis (V3.24AD) and
JABBA (v1.1)
Summary
Detailed
Blue Marlin Drawing
by Les Gallagher (Les Gallagher: fishpics)
White Marlin
Kajikia albida
2019 / 2025 Stock Synthesis (V3.30.13.03) and
JABBA (v1.5 Beta)
Summary
Detailed
White Marlin Drawing
by Les Gallagher (Les Gallagher: fishpics)
Small Tunas
(various)
NA / TBD N/A 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
 
Summary
Prionace glauca
2015 / 2021
North Atlantic:
BSP and Stock Synthesis (V3.24U)

South Atlantic:
BSP and State-Space BSP

Detailed(BSH)
Blue shark Drawing
by A. López, (‘Tokio’)
Isurus oxyrinchus
2019 / TBD
North Atlantic:
Stock Synthesis (V3.24), JABBA and BSP2-JAGS

South Atlantic
:
CMSY and BSP2-JAGS
Detailed(SMA)
Shortfin mako shark Drawing
by A. López, (‘Tokio’)
Lamna nasus   2009 / 2020 Northwest Atlantic:
BSP and ASPM

Southwest Atlantic
:
BSP and CFASP

Northeast Atlantic
:
BSP and ASPM

Southeast Atlantic
:
N/A
Detailed(POR) Portbeagle Drawing
by A. López, (‘Tokio’)

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