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Turbot in the Celtic Sea, Bay of Biscay and Iberian Coast, Gillnet

fish

Psetta maxima

Content last updated
1st Feb 2016

Stock:
Turbot in ICES divisions VIIe, f, h, j and IXa and sub area VIII (Celtic Sea, Bay of Biscay and Iberian waters)

Management:
EU

Overview

Turbot, Psetta maximus is a large, fast growing flatfish distributed from Iceland in the Northeast Atlantic to the Mediterranean and Adriatic in the south. It occurs at relatively low abundance throughout its distributional range. Spawning occurs offshore whilst the nursery grounds are found close inshore along sandy beaches, and the fish move offshore as they grow. The maximum depth at which turbot are found is around 100m. Turbot are considered to be relatively sedentary species, but there are reports of migratory behaviour. Turbot is close to the northern limit of its range in north European waters.

 

A population genetic study of turbot structure is still ongoing but there are indications of distinct turbot populations in the Baltic and Irish Sea.

 

The Northern Atlantic stock, which includes the North Sea, the southern coast of Iceland, the western coast of Scotland and Ireland, to the Celtic Sea (including the Western Approaches – 51°N, 10°W) is different from the stock originating from the Bay of Biscay and the Atlantic side of southern Europe, the southern stock.

 

Transition zones between the northern and southern stocks are found in the English Channel and between the northern stock and the Baltic Sea in the Kattegat and the Belt Sea.

 

Turbot is caught together with another large flatfish such as brill (Scophthalmus rhombus) with the English Channel (VIId,e) and the Celtic Sea (VIIf and VIIg-k) providing the second and third most important fishing grounds for this species. However, these fishing ground are by far much less important than the North Sea providing only mean landings of around 8% and 7% respectively of all North East Atlantic turbot landings over the entire time-series, Landings from other areas are negligible.

 

Turbot in divisions VIIe, f, h, j and sub areas VIII and IXa remain data-limited stocks with no TAC or advised ICES catch.

 

References

ICES. 2012. Report of the Working Group on Assessment of New MoU Species (WGNEW), 5 – 9 March 2012, . ICES CM 2012/ACOM:20. 258 pp.

Stock Status

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Turbot in Division VIIe, f, j, h and sub area VIII and IXa has been scored as high risk. This is because turbot has a medium vulnerability score and the population trend is unknown due to the limited information available.

Turbot in Division VIIe, f, j, h and sub area VIII and IXa has been scored as high risk. This is because turbot has a medium vulnerability score and the population trend is unknown due to the limited information available.

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Management

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The management of Turbot in Division VIIe, f, h, j and sub area VIII and IXa has been scored a high risk. This is because there are no management decisions or assessments of stock status for turbot, there is only minimal data being collected and there are no specific management measures in place to restrict harvesting. However, there are management measures in place to control effort in the fisheries.

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Bycatch

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The bycatch in the demersal gillnet fishery has been scored a high risk. This is because there is a risk of bycatches of non-target species and cetaceans in the fisheries in some of the areas, and there has been limited monitoring and no estimates of the effects on populations or technical measures introduced to prevent catches. The EU landings obligation is intended to reduce discarding of TAC species over the period up to 2020 and technical measures are being developed to reduce incidental catches of endangered, protected and threatened species. EU regulations specify the use of acoustic deterrents on gillnets, depending on area, to reduce by catch.

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Habitat

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The habitat impact of the demersal gillnet fishery has been scored a very low risk. This is because set gillnets have relatively little impact on the seabed compared to other fishing activities. Lost or abandoned gillnets can get entangled on habitat features and weights can cause surface penetration of the seabed. Some spatial management is in place to protect vulnerable areas.

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Outlook

Current risk status Outlook Reason
Stock High Unknown The status of the stock and reference point for long-term sustainability and fishing mortality is unknown. Vulnerability has been scored as moderate and temporal trends in spawning stock biomass remain unclear.
Management High Stable The management of the stock is likely to remain stable in the future. The EU Common Fisheries Policy is going through reform and there is some uncertainty on how this will impact fisheries management in this area.
Bycatch High Improving There is a risk of cetacean capture and no indication of the effects on cetacean populations. The EU landings obligation is intended to reduce discarding of managed species over the period up to 2020.
Habitat Very low Stable Technical and spatial management measures are under development and will likely reduce the risk further.

Type Current Risk Status Outlook Reason

Stock

Management

Bycatch

Habitat

Nutritional Information

 
Energy
95 (kcal)
5%*
LOW
Fat
2.7 (g)
4%*
LOW
Saturates
0.7 (g)
4%*
LOW
Sugar
0 (g)
0%*
LOW
Salt
0.17 (g)
3%*

*per 100 g raw

Nutrition information per 100g (raw)

Rich in Protein | Vitamin B12 | Selenium

Good Source Of Vitamin B6 | Phosphorus

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