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North Sea Horse mackerel - North Sea, Eastern Channel and Skagerrak, 2008
Marine Resource  Fact Sheet
ICES Advice 2009
North Sea Horse mackerel - North Sea, Eastern Channel and Skagerrak, 2008
Fact Sheet Citation  
North Sea horse mackerel (Trachurus trachurus) (Division IIIa (eastern part), Divisions IVb,c, VIId)
Owned byInternational Council for the Exploration of the Sea (ICES) – More
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Species:
FAO Names: en - Atlantic horse mackerel, fr - Chinchard d'Europe, es - Jurel, ru - Ставрида обыкновенная
Geographic extent of North Sea Horse mackerel - North Sea, Eastern Channel and Skagerrak
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
Management unit: Yes
 
 
Habitat and Biology
Depth zone: Shelf (50 m - 200 m).   Vertical distribution: Pelagic.  

Geographical Distribution
Jurisdictional distribution: National

Water Area Overview
Spatial Scale: Sub-Regional

Geo References
Resource Structure
Considered a single stock: Yes
Assessment
 
Overall Assessment Results

Landing table
Scientific Advice

Single-stock exploitation boundaries


Table 6.4.19.1 Horse mackerel (Trachurus trachurus) in Divisions IIIa, IVb,c and VIId (North Sea stock). Single-stock exploitation boundaries (advice), management, and landings
Year

ICES

Advice

Predicted catch corresp. to advice

Agreed

TAC1

ICES

landings2

1987 Not assessed - 30 12
1988 No advice - 50 24
1989 No advice - 45 33
1990 No advice - 40 19
1991 No advice - 45 12
1992 No advice - 55 15
1993 No advice - 60 14
1994 No advice - 60 6
1995 No advice - 60 17
1996 No advice - 60 19
1997 No advice - 60 20
1998 Develop and implement management plan - 60 31
1999 Develop and implement management plan - 60 37
2000 Develop and implement management plan - 51 48
2001 No increase in catch - 51 46
2002 No increase in catch from 1982–1997 average <18 58 23
2003 No increase in catch from 1982–1997 average <18 50 32
2004 No increase in catch from 1982–1997 <18 42 35
2005 No increase in catch from 1982–1997 <18 43 29
2006

No increase in catch from 1982–1997

<18 43 36
2007

No increase in catch from 1982–1997

<18 43

41

2008

No increase in catch from 1982–1997

<18 39 35
2009 Same advice as last year < 18 39  
2010 Same advice as last year < 18    

Weights in ‘000 t.

1Division IIa and Subarea IV (EU waters only).

2Catch of North Sea stock (Divisions IVa (quarters 1–2), IIIa (except western part in quarters 3–4), IVb,c, and VIId).



Management
Management unit: Yes

Management Objectives

The data available for this stock do not change the perception of the stock and do not give reason to change the advice from 2007. The advice on this stock for the fishery in 2010 is therefore the same as the advice given in 2007 and reiterated in 2008. The advice on this stock for the fishery in 2010 is therefore the same as the advice given in 2008 for the 2009 fishery: “ICES reiterates the recommendation made since 2002 to limit the catches to below the 1982–1997 average of 18 000 t. It is necessary to constrain the fishery until there is more information about the structure of horse mackerel stocks, and sufficient information to show that higher exploitation rates are sustainable.

ICES’ advice is based on the time period when the catches in Division VIId were small. In recent years, catches in Division VIId have remained stable at a higher level but without a trend. However, the sustainability of these catches cannot yet be assessed and the basis of ICES’ advice remains unchanged.

The advice for horse mackerel assumes that all catches are counted against the TAC for each stock separately. In 2008 and before, the TAC covered only part of the distribution and fishing areas (EU waters). ICES advises that the management areas correspond to the distribution areas which include all EU, Norwegian, and Faroe Islands waters where horse mackerel are caught.

The table below shows a summary of the TACs set, ICES advice, and catches for 2008, and the 2009 advice and TACs.





Since 2002, the TAC advice has remained the same. Catches of North Sea horse mackerel have varied between 24 and 42 thousand tonnes during this period. In 2008, the catch was 34,750 tonnes which is almost double the advised catch. Most of the catch of North Sea horse mackerel is taken in ICES Division VIId (90% in 2008). The key problem is that the TAC for the western stock is allocated to this ICES division, but catches from this area are of North Sea horse mackerel. To ensure precautionary management of all the horse mackerel stock areas TACs should be allocated according to the advice section in the table above. Specifically, three measures need to be taken:

  1. The TAC for western horse mackerel should apply to all areas where western horse mackerel is caught (EU, Norwegian, and Faroe Islands waters) and where necessary be subject to agreement.
  2. Catches from ICES Division VIId should be taken against a TAC for the North Sea stock.
  3. Catches taken in Division VIIIc need to be taken against a TAC for the western stock.


If the management area limits are revised, measures should be taken to ensure that misreporting of juvenile catch taken in Divisions VIIe,h and VIId (the latter then belonging to the North Sea stock management area) is effectively hindered.


6.4.19.3 Horse Mackerel general. Catches (t) by Subarea. Data as submitted by Working Group members. Data of limited discard information are only available for some years.


Biological State and Trend
Exploitation rate: Undefined
Abundance level: Undefined
Source of information
 
ICES.2009.Report of the ICES Advisory Committee, 2009. ICES Advice, 2009.
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