Planning / Study groups

• Planning Group of Herring Surveys (PGHERS) should meet, at Flødevigen, Norway, from 26 to 30 January 2004 (chair to be announced) to:

a) combine the 2003 survey data to provide indices of abundance for the population within the area;

b) coordinate the timing, area and effort allocation and methodologies for acoustic and larvae surveys for herring and sprat in the North Sea, Division VIa and IIIa and Western Baltic in 2004;

c) review and update the PGHERS manual for acoustic surveys to address standardization of all sampling tools and survey gears;

d) evaluate the results of the investigations of survey overlaps between vessels in the North Sea acoustic survey;

e) assess the status and future of the HERSUR database

• The 2002 WG recommended a Study Group on Herring in the Irish and Celtic Seas [SGHICS] to meet in 2002/03. This study group was to re-evaluate the current data used for the stock assessment of Irish Sea and Celtic Sea herring by re-compilation of long-term data sets, evaluation of the long-term variation in biological parameters (weights-at-age, length-at-age, maturity and condition) of Irish Sea and Celtic Sea herring, and to carry out an otolith exchange of Irish and Celtic Sea herring, the results of which are to be assessed by the study group. This study group was not approved by ASC in 2002; however, there is still a need to undertake all these tasks. Therefore, the WG recommends that a group is convened to meet the terms of reference presented for SGHICS.

1.9.7 Others

• The Report-CD sent out to HAWG members should also contain a copy of the “Working documents” and

“Presentations” folder from the network drive.

• In the light of the substantial contribution the WGs are expected to deliver for the quality control handbook, the authorship of this handbook is changed from Lassen and Sparholt to Lassen and Sparholt (eds.) or ICES, following rules of good scientific practice.

Table 1.3.1.1 Working group estimates of catch from 29F0 and ICES area VIId, 1998 to 2002.

ICES rectangle 29F0 Area VIId

Q1 Q2 Q3 Q4 total WG catch official catch

1998 18 873 16 19,464 20,371 47819 22828

1999 76 10 35 17,021 17,142 43600 23326

2000 20 1 2 16,413 16,436 38718 18109

2001 29 2 2 23,403 23,437 43737 20645

2002 44 12 5 24,853 24,915 45808 37014

average 37 180 12 20,231 20,460 43936 24384

Table 1.5.1: Available disaggregated data for the HAWG per March 2003

her_3a22 1991-2000 X raw data, provided by Jørgen Dalskov, Mar. 2001, splitting revised 1998 X provided by Jørgen Dalskov, Mar. 2001, splitting revised

1999 X provided by Jørgen Dalskov, Mar. 2001, splitting revised, catch data revised 2000 X provided by Jørgen Dalskov, Mar. 2001

2001 X provided by Jørgen Dalskov, Mar. 2002 2002 X provided by Jørgen Dalskov, Mar. 2003

Celtic Sea and VIIj

her_irls 1999 X provided by Ciarán Kelly, Mar. 2000 2000 X provided by Ciarán Kelly, Mar. 2001 2001 D provided by Ciarán Kelly, Mar. 2002 2002 D provided by Ciarán Kelly, Mar. 2003

Clyde

her_clyd 1999 X provided by Mark Dickey-Collas, Mar. 2000 2000-2002 included in VIaN

Irish Sea

her_nirs 1998 X provided by Mark Dickey-Collas, Mar. 2000 1999 X provided by Mark Dickey-Collas, Mar. 2000 2000 X W provided by Mark Dickey-Collas, Mar. 2001 2001 X provided by Mark Dickey-Collas, Mar. 2002 2002 X provided by Richard Nash, Mar. 2003

North Sea

her_47d3, her_nsea 1991 X provided by Yves Verin, Feb. 2001 1992 X provided by Yves Verin, Feb. 2001 1993 X provided by Yves Verin, Feb. 2001 1994 X provided by Yves Verin, Feb. 2001 1995 X provided by Yves Verin, Feb. 2001 1996 X provided by Yves Verin, Feb. 2001 1997 X provided by Yves Verin, Feb. 2001 1998 X W provided by Yves Verin, Mar. 2000

1999 W D provided by Christopher Zimmermann, Mar. 2000 2000 W D provided by Christopher Zimmermann, Mar. 2001 2001 W D provided by Christopher Zimmermann, Mar. 2002 2002 W D provided by Christopher Zimmermann, Mar. 2003

West of Scotland (VIa(N))

her_vian 1997 X provided by Ken Patterson, Mar. 2002 1998 X provided by Ken Patterson, Mar. 2002

1999 W D provided by Paul Fernandes, Mar. 2000, W included in North Sea 2000 W D provided by Emma Hatfield, Mar. 2001, W included in North Sea 2001 W D provided by Emma Hatfield, Mar. 2002, W included in North Sea 2002 W D provided by Emma Hatfield, Mar. 2003, W included in North Sea

West of Ireland

her_irlw 1999 X (W) provided by Ciaran Kelly, Mar. 2000 2000 X (W) provided by Ciaran Kelly, Mar. 2001 2001 D provided by Ciaran Kelly, Mar. 2002 2002 D provided by Ciaran Kelly, Mar. 2003

Sprat in IIIa

spr_kask 1999 X (W) provided by Else Torstensen, Mar. 2000 2000 X (W) provided by Else Torstensen, Mar. 2001 2001 X (W) provided by Lotte Askgaard Worsøe, Mar. 2002 2002 X (W) provided by Lotte Askgaard Worsøe, Mar. 2003

Sprat in the North Sea

spr_nsea 1999 X (W) provided by Else Torstensen, Mar. 2000 2000 X (W) provided by Else Torstensen, Mar. 2001 2001 X (W) provided by Lotte Askgaard Worsøe, Mar. 2002 2002 X (W) provided by Lotte Askgaard Worsøe, Mar. 2003

Sprat in VIId & e

spr_ech 1999 X (W) provided by Else Torstensen, Mar. 2000 2000 X (W) provided by Else Torstensen, Mar. 2001 2001 X (W) provided by Lotte Askgaard Worsøe, Mar. 2002 2002 X (W) provided by Lotte Askgaard Worsøe, Mar. 2003

National Data

Germany: Western Baltic 1991-2000 X provided by Tomas Gröhsler, Mar. 2001 (with sampling)

Germany: North Sea 1995-1998 W provided by Christopher Zimmermann, Mar 2001 (without sampling) Norway: Sprat 1995-1998 W provided by Else Torstensen, Mar 2001 (without sampling) Sweden 1990-2000 W provided by Johan Modin, Mar 2001 (without sampling)

UK/England & Wales 1985-2000 X database output provided by Marinelle Basson, Mar. 2001 (without sampling UK/Scotland 1990-1998 W provided by Sandy Robb/Emma Hatfield, Mar. 2002

Format

Fis hS to ck he r-47d 3 He rring in S ub -a re a IV, D iv is io ns VIId & IIIa (a utumn-s p a wne rs ) Ye a r

As s Ye a r 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002

1988 1989 1990

1991 1549000 1411000 1320000 1346000 1992 1340000 1247000 1277000 1320000 1287000 1993 1456000 1354000 1307000 1184000 1055000 965000 1994 1391000 1260000 1149000 986000 730000 974000 981000 1995 1286000 1138000 993000 778000 484000 790000 718000 690000 1996 1240000 1135000 939000 699000 458000 517000 496000 410000 434000 1997 1265076 1154078 949692 691979 464538 547082 550544 538841 688000 1998 1266239 1151072 957442 702220 470703 543290 549669 518584 745556 1137000 1999 1276674 1169165 980157 716278 462326 512679 500848 488163 656703 878178 1169000 2000 1248953 1149110 971648 714005 458257 502026 474149 447538 568037 701465 905645 908000 2001 1224623 1115764 915372 684053 444981 473353 466975 434421 529153 701800 815482 771796 1244000 2002 1247511 1174169 960957 680708 448835 502526 480400 483788 584344 781524 935096 943389 1428052 1699000

R ho 0.58468 0.77733 1.62668 2.17035

Ab 0 .0 6 3 9 0 .0 9 2 0 .2 0 4 4 0 .3

As d 0.08519 0.14996 0.23187 0.33663

Figure 1.3.1 Example of a proposed quality control database.

Figure 1.3.2 Standardized (pivot table) output of the proposed quality control database.

Figure 1.3.1.1 English Channel and southern North Sea (ICES Div. IVc and VIId): existing and proposed gravel extraction sites. Sources: www.eastchannel.info (for proposed sites), www.sandandgravel.com (for licensed sites), redrawn. Rectangle 29F0 highlighted.

-1° E 0° E 1° E 2° E 3° E 4° E

Figure 1.3.1.2 Herring larvae in the English Channel and southern North Sea. Abundance of larvae (<11mm) per m² from 5 survey series, winters 1997 to 2001.

3 2 1 0 1 2 3 4 5 49

50 51 52 53 54

0.2 0.4 0.6