Single-stock exploitation boundaries

As in 2008, the new analysis available for this stock has not given a 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 over the last 2 years: “Landings should not exceed the level recorded in 2006 of 9400 t.”

In addition, ICES offers the following consideration:

In 2007, ICES identified key issues that would need to be resolved before reaching further improvements in the assessment. The various surveys give a reasonably consistent result for the eastern part of the area. The status of the western part is more uncertain, due to potential mixing with North Sea plaice and limited survey coverage. The landings-at-age matrix does not show proper tracking of the cohorts, probably due to i) mixing of the IIIa stock with the North Sea plaice stock on the main fishing ground in southwestern Skagerrak, and ii) uncertainty in ageing due to low sampling levels.

In 2009, ICES still considered these issues as outstanding, although uncertainty due to age reading is likely to have decreased in the recent years.

This advice will be updated in 2011.

Year	ICESAdvice	Single-stock Exploitation Boundaries	Predicted catch corresp. to advice	Agreed TAC Kattegat	Agreed TAC Skagerrak	ICESLandings
1992	TAC		14.0	2.8	11.2	11.9
1993	Precautionary TAC		-	2.8	11.2	11.3
1994	If required, precautionary TAC		-	2.8	11.2	11.3
1995	If required, precautionary TAC		-	2.8	11.2	10.8
1996	If required, precautionary TAC		-	2.8	11.2	10.5
1997	No advice		-	2.8	11.2	10.1
1998	No increase in F from the present level		11.9	2.8	11.2	8.4
1999	No increase in F from the present level		11.0	2.8	11.2	8.5
2000	F < Fpa		11.8	2.8	11.2	8.8
2001	F < Fpa		9.4	2.35	9.4	11.7
2002	F < Fpa		8.51	1.62	6.42	8.7
2003	F < Fpa		18.4	3.0	10.4	8.9
2004	3	F < Fpa	3	1.8	9.5	9.1
2005		F < Fpa	< 9.5	1.9	7.6	6.9
2006		No increase in F	< 9.6	1.92	7.68	9.4
2007		Maintain current TAC	<9.6	2.125	8.5	8.8
2008		No increase in catch	<9.4	2.338	9.350	8.6
2009	Same advice as last year	No increase in catch	<9.4	2.338	9.350
2010	Same advice as last year	No increase in catch	<9.4
Weights in ‘000 t.1) In March 2002 ACFM revised its advice to 11.6 for both areas combined. 2) The TAC for the two areas combined was adjusted to 11 200 tonnes in mid-2002.3) Single-stock boundary and the exploitation of this stock should be conducted in the context of mixed fisheries.