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Bigeye tuna - Western and Central Pacific Ocean (WCPO), 2005
Marine Resource  Fact Sheet
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Stock status report
Bigeye tuna - Western and Central Pacific Ocean (WCPO), 2005
Fact Sheet Citation  
Owned byInter-American Tropical Tuna Commission (IATTC)   more>>
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Species:
Thunnus obesus
Species thumbnail
Fao Names :  en - Bigeye tuna, fr - Thon obèse(=Patudo), es - Patudo
Distribution of Bigeye tuna - Western and Central Pacific Ocean (WCPO)
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Area Details Advanced search
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Regional
Considered a management unit: Yes
 
 
Habitat and Biology
Bottom type: Unspecified    Depth zone: Abyssal    Horizontal distribution: Oceanic    Vertical distribution: Pelagic    

Geographical Distribution
Jurisdictional distribution: Highly migratory

Water Area Overview
Spatial Scale: Regional

Geo References
Resource Structure
Considered a single stock: Yes
Management
Considered a management unit: Yes
Biological State and Trend
Exploitation state: Fully exploited


The current bigeye assessment indicates the stock is not in an overfished state although current fishing mortality rates are approaching or exceeding the overfishing benchmark. The current level of exploitation appears not to be sustainable in the long term, unless the high recent recruitment is maintained in the future. Lower future recruitment is a possibility if the recruitment trends for bigeye in the EPO are mirrored in the WCPO. Should recruitment fall to average levels, current catch levels would result in stock reductions to near and possibly below MSY-based reference points. Reduction of juvenile fishing mortality in the equatorial regions would have significant benefits for both the bigeye tuna stock and the longline fishery. On this basis, the SCTB recommended that, as a minimum measure, there be no further increase in the fishing mortality rate for bigeye tuna from the recent level.
Bibliography
 
“Stock assessment of bigeye tuna in the western and central Pacific Ocean. Standing Committee on Tuna and Billfish, Majuro, Marshall Islands, August, 2004. 73 p.” Hampton, J., P. Kleiber, A. Langley, and K. Hiramatsu 2004 SCTB-17/SA-2 SCTB Click to open.
“The Western and Central Pacific tuna fishery: 2003: overview and status of stocks. xix 66 p.” Langley, A., Hampton, J., Williams, P. and Lehodey, P. 2005 Tuna Fisheries Assessment Report 6 SPC Click to open.
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