Nephrops, Firth of Clyde and Sound of Jura, Demersal otter trawl

Nephrops norvegicus
Content last updated
04 June 2019
Stock
Nephrops in Firth of Clyde and Sound of Jura; Functional Unit (FU) 13
Management
European Union
Stock Status
2 of 5
Low risk
Management
2 of 5
Low risk
Bycatch
4 of 5
High risk
Habitat
4 of 5
High risk

Stock status

2 of 5
Low risk

Nephrops in the Firth of Clyde and Sound of Jura has been scored a low risk for stock status. The stock is in a safe condition but harvested at a rate slightly above optimum. The abundance has been well above the level associated with sustainable harvesting (MSY Btrigger) but the rate of harvest has fluctuated just above that associated with maximum sustainable yield since 1995.

Management

2 of 5
Low risk

The management of the stock of Nephrops in the Firth of Clyde and Sound of Jura has been identified as a low risk. 

The stock is assessed annually by ICES. Although the Total Allowable Catch (TAC) is set for the West of Scotland (ICES Subarea 6) as a whole, which could lead to increases in fishing effort on individual functional units. However, there are safeguards under the Multi Annual Plan for the management of Western Waters fisheries to avoid overexploitation of these individual functional units.   

Surveillance of enforceable measures outside of quota management can be considered moderately effective with adequate enforcement and compliance.

Bycatch

4 of 5
High risk

The bycatch risk of this fishery is scored as a high risk. Bycatch and discard rates are high in Nephrops trawls due to the small cod end mesh requirements of the target species. However, measures to reduce bycatch and discards in these fisheries have been the subject of much research over the years, resulting in technical measures which improve selectivity implemented as a statutory requirement. There also features of trawl design which can reduce discards which can be implemented on a non-statutory basis.

Habitat

4 of 5
High risk

The habitat risk of this fishery is scored as high risk. Nephrops trawlers target specific habitats containing burrowing mud communities. Changes in the biodiversity of these areas have been associates with trawling. There is a process in place under the OSPAR convention and UK Marine Acts to avoid adverse impacts through the designation of Marine Protected Areas.