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Black bream in the English Channel, Demersal pair trawl

fish

Spondyliosoma cantharus

Content last updated
7th Jan 2016

Stock:
Black bream in ICES divisions VIId and e (English Channel)

Management:
EU

Overview

Black bream (Spondyliosoma cantharus) is a widely distributed roundfish that inhabits the waters of the Northeastern Atlantic shelf and Mediterranean. This species is found over seagrass beds and rocky/sandy substrates up to a maximum depth of 300 m. Juveniles are found in shallower water, typically at depths of up to 50 m, and remain inshore until about two to three years of age.

 

This species is slow growing, long-lived and feeds on algae, seaweed and small invertebrates. Between March and May, females lay their eggs in a nest on sandy and gravel substrates which the male builds and protects (Pawson, 1995). Black bream is a hermaphrodite and undergoes a change in sex from male to female during its life cycle. They mature initially as a male at approximately 20 cm to 30 cm in length and then undergo a sex change to become female at a length of 40 cm or above (Pawson 1995).

 

The life history characteristics of black bream make this species particularly vulnerable to local over-exploitation given that males and females exhibit a high degree of habitat specificity during the spawning season. Black bream are targeted by fisheries when they form aggregations around nesting areas. Although fishery regulations for black bream are limited, the currently developing network of marine protected areas offer protection. Other than the use of marine protected areas, there is no management of this stock and continued monitoring of its population status and harvest levels is recommended.

 

References

Pawson, M.G. 1995. Biogeographical identification of English Channel fish and shellfish stocks. Fisheries Research Technical Report No. 99. MAFF Directorate of Fisheries Research, Lowestoft. [http://www.cefas.co.uk/Publications/techrep/tech99.pdf] [Date accessed: 31-Dec-15]

Stock Status

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The status of the black bream stock in Division VIId,e (English Channel) has been scored a very high risk. This is because the species has a relatively high vulnerability score of 52/100 and temporal trends in spawning stock biomass are unknown in recent years.

The status of the black bream stock in Division VIId,e (English Channel) has been scored a very high risk. This is because the species has a relatively high vulnerability score of 52/100 and temporal trends in spawning stock biomass are unknown in recent years.

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Management

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The management of black bream in Division VIId e (English Channel) has been scored a high risk. This is because management decisions are not informed by an annual stock assessment, minimal data has been collected for this stock and there are limited management measures in place to restrict harvesting.

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Bycatch

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The bycatch in the demersal pair trawl fishery for black bream has been scored a moderate risk. This is because in the although the demersal pair trawl fleet has the potential to take relatively high quantities of bycatch there is evidence that mitigation measures in this fishery are adequate to minimise discards. There is potential for bycatches of vulnerable species such as marine mammals but this has not ben reported in this fishery

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Habitat

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The habitat impact of the demersal pair trawl fishery for black bream in the English Channel has been scored a high risk. This is because demersal  trawls interact with seabed habitats resulting in abrasion and penetration from ground gear, sweeps and bridles. Some spatial management in place to restrict the footprint of this gear on the seabed.

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Outlook

Current risk status Outlook Reason
Stock High Unknown The status of the stock in the future is unknown. This species has a relatively high vulnerability score of 52/100, an annual assessment of stock status has not been conducted and temporal trends in spawning stock biomass remain unclear.
Management Moderate Stable The management of the stock is likely to remain stable in the future. The EU Common Fisheries Policy is going through reform and thus there is some uncertainty on how this will impact fisheries management in the English Channel. However, management is likely to remain stable.
Bycatch High Improving The bycatch impact of the demersal otter trawl fishery is likely to improve in the future. Targeted black bream fisheries using 100 mm mesh cod end have been observed to catch predominantly black bream with a low discard rate. Technical and spatial management measures are under development and will likely reduce the risk further.
Habitat Moderate Improving The habitat impact of the demersal otter trawl fishery is likely to improve in the future. Technical and spatial management measures are under development aimed at reducing the effects of trawling on black bream habitat  and will potentially reduce the risk further.

Type Current Risk Status Outlook Reason

Stock

Management

Bycatch

Habitat

Nutritional Information

 
Energy
96 (kcal)
5%*
LOW
Fat
2.9 (g)
4%*
 
Saturates
No data
No data%*
LOW
Sugar
0 (g)
0%*
LOW
Salt
0.28 (g)
5%*

*per 100 g raw

Nutrition information per 100g (raw)

Rich in Protein | Niacin | Vitamin B6 | Vitamin B12 | Phosphorus

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