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West of Ireland and Porcupine Bank herring

Main characteristics and peculiarities
• fishery exploits a mixture of a winter/spring and an autumn spawning component
• the winter/spring spawning component is distributed in the northern part of the area
• main decline in the overall stock appears to have taken place on the autumn spawning component, particularly on the spawning grounds in the south of the area

Assessment Summary
year	2000 (WG 2001)
type	single species: Integrated Catch Analysis, with various assumed terminal Fs
assessment quality	poor
main problems	(1) no fishery independent data available (2) significant misreporting and TAC exceeding
fisheries independent information	no tuning data available
catch	15'000 t (1999: 26'100 t)
spawning stock biomass	35'000-54'000 t (1999: 68'700 t)
fishing mortality	F(adults [3-6])=0.4-0.6 (1999: 0.52)
reference points	Bpa: 110'000 t, Blim: 81'000 t, Fpa: 0.22, Flim: 0.33
state of the stock	outside safe biological limits (SSB below Bpa, F above Fpa)
perspective	if F is not significantly reduced, a further decline of the SSB is expected

Stock parameters (under construction)

This standard figure can be downloaded as a printable pdf-file (requires Acrobat Reader)

Distribution
West of Ireland and Porcupine Bank herring is distributed in ICES Areas VIa(South) and VIIb, c.

Management advice
Fishing mortality should be reduced to 0.2, which corresponds to catches of 14'000 t in 2002.

Source
ICES Working Group for the assessment of Herring South of 62°N 2000, ICES CM 2000/ACFM:10, and 2001, ICES CM 2001/ACFM:12

Data entered/updated by (Date)
Christopher Zimmermann (21-07-00/27-06-01)

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