Fisheries and Resources Monitoring System

Haddock - Western Channel
Marine Resource  Fact Sheet
ICES Advice 2012
Haddock - Western Channel
Fact Sheet Citation  
Haddock in Divisions VIIb-k
Owned byInternational Council for the Exploration of the Sea (ICES) – More
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FAO Names: en - Haddock, fr - Églefin, es - Eglefino, zh - 黑线鳕, ru - Пикша
Geographic extent of Haddock - Western Channel
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
Management unit: No        Reference year: 2012
Biological State and Trend
State & Trend Descriptors
Exploitation rateAbove targetHigh fishing mortality
Abundance levelAbove triggerIntermediate abundance

SSB shows a slowly increasing trend over the time-series and is well above MSY Btrigger. Fishing mortality remains above FMSY and shows a declining trend over the time-series with some fluctuations. Recruitment is highly variable and in the past the SSB and catches have increased after good recruitment. Recruitment of the 2009 year class was exceptionally good, and catches have increased since 2010. However, most of the increase in catch is being discarded because these fish were under the minimum landing size (mainly in 2010) and over-quota (mainly in 2011).
Habitat and Biology
Depth zone: Shelf (50 m - 200 m).   Vertical distribution: Demersal/Benthic.  

Adult haddock appear to be continuously distributed from the north of Biscay along the Irish coasts and the west of Scotland into the North Sea. It is not clear from their distribution if the Divisions VIIb–k stock is distinct from the surrounding areas.
Geographical Distribution
Jurisdictional distribution: Shared between nations

Water Area Overview
Spatial Scale: Sub-Regional

Ecoregion: Celtic Sea and West of Scotland.
Geo References
Resource Structure
Considered a single stock: Yes

The fisheries

Haddock are caught in mixed demersal fisheries. Some fleets are using 80 mm mesh to target Nephrops, 90 mm mesh in mixed fisheries, and 100 mm to target gadoids and other species.
Catch distribution Total catch (2011) = 26.8 kt, of which 47% are landings (all fleets combined) and 53% discards.
Scientific Advice

ICES advises on the basis of the MSY transition that landings should be no more than 9500 tonnes.

Technical measures should be introduced to reduce discard rates in fisheries catching haddock.
Overall Assessment Results
Figure Haddock in Divisions VIIb–k. Summary of stock assessment (weights in thousand tonnes). Top right: SSB/F for the time-series used in the assessment. Predicted recruitment values are shaded; predicted SSB is shown by dashed line.
Assessment Model

Quality consideration

There is considerable uncertainty around the estimated discard numbers-at-age due to the diverse fishing (and discarding) practices and relatively low numbers of discard samples. Improving discard estimates would require a significant increase in the number of observer trips or other monitoring means.

The estimates of F and trends in recruitment and SSB appear to be quite robust to the absolute level of discards used in the model.

Scientific basis

Assessment type ASAP (Age-Structured Assessment Programme; NOAA toolbox).
Input data Catch-at-age; combined French/Irish WIBTS groundfish survey; Irish commercial tuning index.
Discards and bycatch Discards included in the assessment.
Indicators None.
Other information This stock was benchmarked in 2012
Working group report WGCSE
Management unit: No

Management plans

No specific management objectives are known to ICES.
Source of information

The above excerpts are from the first two pages of the ICES advice, the supporting information to this advice can be read in full at the following reference:
ICES. Haddock in Divisions VIIb–k. Report of the ICES Advisory Committee, 2012. ICES Advice, June 2012. Click to open
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