FIRMS Stock Status and Trend Summaries (extracted from reports), results for: "tuna", "albacore" |
---|
Title | Factsheet | Exploitation Rate | Abundance Level | Exploitation State |
---|
Northern Bluefin tuna - Western Atlantic, 2014 | ICCAT, 2014 | F2010-2012/F0.1: Low potential recruitment = 0.60 (0.50-0.72) | SSB2013/SSBFMSY: Low potential recruitment =2.25 (1.92-2.68) / High potemtial recruitment =0.48 (0.35-0.72) | | Yellowfin tuna - Indian Ocean, 2017 | IOTC, 2017 | Subject to overfishing (F2017/FMSY (plausible range) = 1.20 (1.00–1.71)) | Overfished (SB2017/SBMSY (plausible range) = 0.83 (0.74–0.97)) | | Albacore - Indian Ocean, 2014 | IOTC, 2014 | Not subject to overfishing (F2014/FMSY (80% CI) = 0.85 (0.57–1.12)) | Not overfished (SBcurrent/SBMSY (80% CI) = 1.80 (1.38–2.23)) | | Bigeye tuna - Eastern Pacific (EPO), 2018 | IATTC, 2018 | Fishing mortality rate close to that for MSY | Spawning biomass close to that for MSY | Fully exploited | Albacore - Mediterranean Sea, 2010 | ICCAT, 2010 | F2009/FMSY <=1 | B2009/BMSY= Not estimated | | Frigate tuna - Maldives, 2009 | FAO, 2009 | | | Underexploited | Tuna and tuna-like species - Global, 2009 | FAO, 2009 | | | | Yellowfin tuna - Atlantic, 2018 | ICCAT, 2018 | Fcur/FMSY = 0.96 range (0.56 - 1.50) | Bcur/BMSY = 1.17 range (0.75 - 1.62) | | Skipjack tuna - Eastern Pacific, 2018 | IATTC, 2018 | Moderate fishing mortality | Intermediate abundance | Uncertain | Yellowfin tuna - Eastern Pacific, 2018 | IATTC, 2018 | Moderate fishing mortality, close to that corresponding to MSY | Intermediate abundance | Fully exploited | Albacore - North Atlantic, 2014 | ICCAT, 2014 | F2014/FMSY = 0.54 range (0.35-0.72) | B2015/BMSY = 1.36 range (1.05-1.78) | | Albacore - Northern Pacific, 2018 | IATTC, 2018 | Moderate fishing mortality | Intermediate abundance | Moderately exploited | Bullet tuna - Indian Ocean, 2014 | IOTC, 2014 | Not assessed/Uncertain (F2014/FMSY (80% CI) = unknown) | Not assessed/Uncertain (B2014/BMSY (80% CI) = unknown) | | Frigate tuna - Indian Ocean, 2014 | IOTC, 2014 | Not assessed/Uncertain (F2014/FMSY (80% CI) = unknown) | Not assessed/Uncertain (B2014/BMSY (80% CI) = unknown) | | Longtail tuna - Indian Ocean, 2015 | IOTC, 2015 | Subject to overfishing (F2015/FMSY (80% CI) = 1.04 (0.84–1.46) ) | Overfished (B2015/BMSY (80% CI) = 0.94 (0.68–1.16)) | | Northern Bluefin tuna - East Atlantic and Mediterranean Sea, 2014 | ICCAT, 2014 | F2013/F0.1 = 0.4 | SSB2013/SSBF0.1: Medium recruitment (1950-2006) =1.10 / Low recruitment (1970s)=1.60 / High recruitment (1990s)=0.67 | | Pacific bluefin tuna - Eastern Pacific (EPO), 2018 | IATTC, 2018 | High fishing mortality | Low abundance | Overexploited | Albacore - South Atlantic, 2014 | ICCAT, 2014 | F2014/FMSY = 0.54 range (0.31-0.87) | B2015/BMSY = 1.10 range (0.51-1.80) | | Skipjack tuna - West Atlantic, 2013 | ICCAT, 2013 | F2013/FMSY = Likely<1 | B2013/BMSY = Likely>1 | | Bigeye tuna - Indian Ocean, 2015 | IOTC, 2015 | Not subject to overfishing (F2015/FMSY (plausible range) = 0.76 (0.49–1.03)) | Not overfished (SB2015/SBMSY (plausible range) = 1.29 (1.07–1.51)) | | Skipjack tuna - East Atlantic, 2013 | ICCAT, 2013 | F2013/FMSY = Likely<1 | B2013/BMSY = Likely>1 | | Bigeye tuna - Atlantic, 2017 | ICCAT, 2017 | F2017/FMSY = 1.63 range (1.14-2.12) | B2017/BMSY = 0.59 range (0.42-0.80) | | Skipjack tuna - Indian Ocean, 2016 | IOTC, 2016 | Not subject to overfishing (C2016/C40%SSB (80% CI) = 0.88 (0.72-0.98)) | Not overfished (SB2016/SB40%SSB (80% CI) = 1.00 (0.88–1.17)) | | Southern Bluefin tuna - Global, 2018 | CCSBT, 2018 | Moderate (Below Fmsy) | Low abundance | Overexploited |
Status and Trend Summaries (extracted from reports) Results for domain [resource] keyword=[tuna] keyword=[albacore] 24 result(s) resource | Fact sheets | biological state & trend |
---|
Northern Bluefin tuna - Western Atlantic, 2014 | ICCAT, 2014 | Exploit Rate: F2010-2012/F0.1: Low potential recruitment = 0.60 (0.50-0.72) Abundance Level: SSB2013/SSBFMSY: Low potential recruitment =2.25 (1.92-2.68) / High potemtial recruitment =0.48 (0.35-0.72) | | Yellowfin tuna - Indian Ocean, 2017 | IOTC, 2017 | Exploit Rate: Subject to overfishing (F2017/FMSY (plausible range) = 1.20 (1.00–1.71)) Abundance Level: Overfished (SB2017/SBMSY (plausible range) = 0.83 (0.74–0.97)) | | Albacore - Indian Ocean, 2014 | IOTC, 2014 | Exploit Rate: Not subject to overfishing (F2014/FMSY (80% CI) = 0.85 (0.57–1.12)) Abundance Level: Not overfished (SBcurrent/SBMSY (80% CI) = 1.80 (1.38–2.23)) | | Bigeye tuna - Eastern Pacific (EPO), 2018 | IATTC, 2018 | Exploit State: Fully exploitedExploit Rate: Fishing mortality rate close to that for MSY Abundance Level: Spawning biomass close to that for MSY | | Albacore - Mediterranean Sea, 2010 | ICCAT, 2010 | Exploit Rate: F2009/FMSY <=1 Abundance Level: B2009/BMSY= Not estimated | | Frigate tuna - Maldives, 2009 | FAO, 2009 | Exploit State: Underexploited | | Tuna and tuna-like species - Global, 2009 | FAO, 2009 | | Complete description  The following classification of the status of stocks is used throughout this document.
- U Non-fully exploited.
- F Fully exploited.
- O Overexploited.
For Further clarifications on the criteria for the classification of fish stock status, see the Source Report (Appendix - Assessment methodology, Table 1)
A summary on the status of various stocks of tuna and tuna-like species is given in
Table D19. It was obtained by interpreting results of stock assessments according to the
classification procedure adopted by FAO in this review. Those assessments available
at the time of preparation of this review (end of March 2011) were taken mostly from
Web pages of: -
Commission for the Conservation of Southern Bluefin Tuna (CCSBT );
-
Inter-American Tropical Tuna Commission (IATTC ) for the
eastern Pacific;
-
International Commission for the Conservation of Atlantic Tunas (ICCAT );
-
Indian Ocean Tuna Commission (IOTC );
-
Western Central Pacific Fishery Commission (WCPFC ).
The knowledge and data on the principal market tunas are generally much better than
those for other species of tuna and tuna-like species. They have been studied for many
years and more research effort is devoted to them. However, even for these species,
significant uncertainties exist in the basic biological knowledge and data. For example,
relatively recent research indicates that the life span of southern bluefin tuna, one of
the best studied tuna, may be considerably longer than previously believed. Moreover,
for this species, as compared with trade statistics, the catches were substantially
under reported for a number of years. For Atlantic bluefin tuna, another well-studied
species, officially reported catches might be significantly smaller in the past than those
actually taken. This conclusion is based on information from a trade-based statistical
programme introduced by ICCAT (Miyake, 1998) as well as from capacity estimates
(ICCAT, 2009). When considering the information on the stock status, uncertainties in
stock assessment need to be taken into account.
Most tuna stocks are fully exploited, some are overexploited. Generally, some
temperate tuna species (i.e. Atlantic and southern bluefins [most desired for sashimi])
are much more overexploited (depleted) than any of the tropical tuna species. For the
Pacific bluefin (also used for sushimi), the yield-per-recruit could be increased if the
number of small bluefin caught by trolling and purse seining can be reduced.
The stocks of albacore (temperate species) used mostly for canning are not fully
exploited in the South Pacific but they are fully exploited in the Indian Ocean and the
South Atlantic and overexploited in the North Atlantic and the North Pacific. The
status of albacore in the Mediterranean Sea is unknown. Generally, most tropical principal market tunas have reacted well to exploitation
owing to their very high reproductive potential, wide geographical distribution,
opportunistic behaviour and other population dynamics characteristics that make them
highly productive. With proper management, they are capable of sustaining high yields.
There may still be potential for increasing catches of skipjack in the western and
central Pacific with lower potential in the other oceans. However, skipjack are caught
together with tuna species that are fully exploited or overexploited. Therefore, until
more selective fishing methods are developed, it is not desirable to increase the catches
of skipjack.
Most other stocks of tropical tunas have become fully exploited and a few are
overexploited. Generally, a possibility of further deterioration in the status of tropical
tunas should not be underestimated. Concerns are increasing over the exploitation of
bigeye in all oceans. This is another species that is highly desired for sashimi and has a
shorter life span than bluefin. In addition to possibly causing overfishing in the future,
the increasing purse seine catches of small bigeye may negatively affect the yield per
recruit.
The status of many tuna and tuna-like species other than the principal tunas is highly
uncertain or simply unknown. Therefore, the intensification of their exploitation
raises concerns. Significant uncertainties in the status of many billfishes represent a
serious conservation problem. Some stocks are overexploited in the Atlantic and
the Pacific, while their status is mainly unknown in the Indian Ocean. Because of
commercial exploitation, there is more known about swordfish than other billfishes. In
the Mediterranean Sea, the swordfish stock seems to be overexploited, but the overall
situation in the remainder of the Atlantic and Pacific is more optimistic. However, in
the Indian Ocean, there are concerns about the intensification of swordfish fishing
owing to the risk of potential local overexploitation.
| | Yellowfin tuna - Atlantic, 2018 | ICCAT, 2018 | Exploit Rate: Fcur/FMSY = 0.96 range (0.56 - 1.50) Abundance Level: Bcur/BMSY = 1.17 range (0.75 - 1.62) | | Skipjack tuna - Eastern Pacific, 2018 | IATTC, 2018 | Exploit State: UncertainExploit Rate: Moderate fishing mortality Abundance Level: Intermediate abundance | | Yellowfin tuna - Eastern Pacific, 2018 | IATTC, 2018 | Exploit State: Fully exploitedExploit Rate: Moderate fishing mortality, close to that corresponding to MSY Abundance Level: Intermediate abundance | | Albacore - North Atlantic, 2014 | ICCAT, 2014 | Exploit Rate: F2014/FMSY = 0.54 range (0.35-0.72) Abundance Level: B2015/BMSY = 1.36 range (1.05-1.78) | | Albacore - Northern Pacific, 2018 | IATTC, 2018 | Exploit State: Moderately exploitedExploit Rate: Moderate fishing mortality Abundance Level: Intermediate abundance | | Bullet tuna - Indian Ocean, 2014 | IOTC, 2014 | Exploit Rate: Not assessed/Uncertain (F2014/FMSY (80% CI) = unknown) Abundance Level: Not assessed/Uncertain (B2014/BMSY (80% CI) = unknown) | | Frigate tuna - Indian Ocean, 2014 | IOTC, 2014 | Exploit Rate: Not assessed/Uncertain (F2014/FMSY (80% CI) = unknown) Abundance Level: Not assessed/Uncertain (B2014/BMSY (80% CI) = unknown) | | Longtail tuna - Indian Ocean, 2015 | IOTC, 2015 | Exploit Rate: Subject to overfishing (F2015/FMSY (80% CI) = 1.04 (0.84–1.46) ) Abundance Level: Overfished (B2015/BMSY (80% CI) = 0.94 (0.68–1.16)) | | Northern Bluefin tuna - East Atlantic and Mediterranean Sea, 2014 | ICCAT, 2014 | Exploit Rate: F2013/F0.1 = 0.4 Abundance Level: SSB2013/SSBF0.1: Medium recruitment (1950-2006) =1.10 / Low recruitment (1970s)=1.60 / High recruitment (1990s)=0.67 | | Pacific bluefin tuna - Eastern Pacific (EPO), 2018 | IATTC, 2018 | Exploit State: OverexploitedExploit Rate: High fishing mortality Abundance Level: Low abundance | | Albacore - South Atlantic, 2014 | ICCAT, 2014 | Exploit Rate: F2014/FMSY = 0.54 range (0.31-0.87) Abundance Level: B2015/BMSY = 1.10 range (0.51-1.80) | | Skipjack tuna - West Atlantic, 2013 | ICCAT, 2013 | Exploit Rate: F2013/FMSY = Likely<1 Abundance Level: B2013/BMSY = Likely>1 | | Bigeye tuna - Indian Ocean, 2015 | IOTC, 2015 | Exploit Rate: Not subject to overfishing (F2015/FMSY (plausible range) = 0.76 (0.49–1.03)) Abundance Level: Not overfished (SB2015/SBMSY (plausible range) = 1.29 (1.07–1.51)) | | Skipjack tuna - East Atlantic, 2013 | ICCAT, 2013 | Exploit Rate: F2013/FMSY = Likely<1 Abundance Level: B2013/BMSY = Likely>1 | | Bigeye tuna - Atlantic, 2017 | ICCAT, 2017 | Exploit Rate: F2017/FMSY = 1.63 range (1.14-2.12) Abundance Level: B2017/BMSY = 0.59 range (0.42-0.80) | | Skipjack tuna - Indian Ocean, 2016 | IOTC, 2016 | Exploit Rate: Not subject to overfishing (C2016/C40%SSB (80% CI) = 0.88 (0.72-0.98)) Abundance Level: Not overfished (SB2016/SB40%SSB (80% CI) = 1.00 (0.88–1.17)) | | Southern Bluefin tuna - Global, 2018 | CCSBT, 2018 | Exploit State: OverexploitedExploit Rate: Moderate (Below Fmsy) Abundance Level: Low abundance | Complete description  The 2017 stock assessment suggested that the SBT spawning biomass is at 13% of its initial biomass as well as below the level that could produce maximum sustainable yield. However, there has been improvement since the 2011 stock assessment which indicated the stock in 2010 was at 5.5% of initial biomass. The current TAC has been set using the management procedure adopted in 2011, which has a 70% probability of rebuilding to the interim target biomass level by 2035. Work to develop a new management procedure results in an estimate of spawning biomass as 17% of its initial value, with an increase in spawning biomass of 79% since 2009. | |
|