Nephrops in the Skagerrak-Kattegat, FU3-4, Demersal otter trawl
- Content last updated
- 29 October 2019
- Nephrops in the Skagerrak-Kattegat, Functional Units 3-4
- Stock Status
Nephrops in the Skagerrak-Kattegat has been scored moderate risk for stock status. This is because Neprhops in this functional unit have an unknown stock size (B) due to the as yet insufficient time series data. The harvest rate (F) is below FMSY.
The fishery management of Nephrops in Skagerrak and Kattegat, FU3-4 has been scored low risk. This is because whilst the functional unit is assessed annually by ICES, the stock still is still considered data limited. However, management controls in respect of the advice are consistent with the scientific advice and surveillance is generally effective with adequate enforcement and compliance.
The bycatch in the demersal otter trawl fishery has been scored high risk. This is because the 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, 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.
The habitat impact of this fishery has been scored a high risk. This is because bottom otter trawls interact with seabed habitats resulting in abrasion and penetration from ground gear, sweeps and bridles, there is no spatial management in place within the small area of mud where fishing takes place, and some sensitive habitats occur there. Changes in the biodiversity of these areas have been associated 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. This is not yet in place for Skagerrak and Kattegat fishery, however