Nephrops in the Noup (FU10), Demersal otter trawl

Nephrops norvegicus
Content last updated
18 July 2019
Stock
Nephrops in the Noup, FU10
Management
EU
Stock Status
3 of 5
Moderate risk
Management
3 of 5
Moderate risk
Bycatch
5 of 5
Very high risk
Habitat
3 of 5
Moderate risk

Stock status

3 of 5
Moderate risk

Nephrops in Noup, FU10 has been scored a moderate risk. Although the stock is not regularly assessed it is considered to be stable and lightly exploited.

The risk score was calculated using the RASS scoring guideline’s data-limited approach where the low vulnerability score for Nephrops (14/100; Sealifebase) was weighted with an uncertain stock indicator and the and the harvest rate (percentage of the stock caught every year) is low at 2.9% which is less than half that which is considered to correspond with Maximum Sustainable Yield (FMSY) for Nephrops stocks in the North Sea.

Management

3 of 5
Moderate risk

Nephrops in Noup, FU10 has been scored moderate risk. Whilst the Functional Unit is assessed biennially as a data-limited stock by ICES, the TAC is set for the North Sea as a whole, which could lead to uncontrolled increases in fishing effort in individual Functional Units. 

There is provision within the current Multi Annual Plan for the North Sea to introduce measures to conserve individual Nephrops Functional Units if required. However, a full set of reference levels is not available for this Functional Unit at present, so it could be difficult to define whether these measures should be introduced.

Surveillance is generally moderately effective, though more effective on larger vessels. Compliance is considered adequate with no officially reported problems.

Bycatch

5 of 5
Very high risk

The bycatch risk of this fishery are scored very high risk. This is because the bycatch and reported discard rates are high (>50%) 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, which in turn have been implemented as a statutory requirement. Further measures, such as modified trawl designs, have been implemented on a non-statutory basis. Furthermore, the cod recovery plan has been implemented in this area and this is expected to have had an influence on the discarding levels in North Sea demersal fisheries and the incoming EU landings obligation is also intended to reduce discarding.

Habitat

3 of 5
Moderate risk

The habitat risk of this fishery has been scored a moderate risk. This is because, with in the core area of this fishery there are vulnerable marine habitats identified and currently there is some spatial management to avoid trawling affecting these habitats. However, there remains some uncertainties about the location of some sensitive seabed habitats so these remain at risk.