Report of the Study Group on Fish and Fisheries Issues in the

3,35

MB

BSRP (SGBFFI)

61

stron

3888

ID

Helsinki Commission

2005

rok

Contents

Executive Summary

1 Introduction

1.1 Participation

1.2 Terms of Reference.

1.3 Activities of BSRP related to SGBFFI 2004 recommendations

2 Baltic herring growth modelling

2.1 Herring growth database

2.2 Environmental data

2.3 Analysis of temporal and spatial variability

2.4 Analysis of the effect of environmental variables on CF20

2.5 Statistical modelling

2.6 Discussion.

2.7 Future growth modelling for stock development forecasts

3 Environmental parameters affecting herring population dynamics.

3.1 Gulf of Riga herring

3.2 Herring in the Bothnian Sea

3.3 Herring in the Gulf of Finland.

3.4 Herring stocks in the Baltic proper

4 Compilation of historical data on Baltic fish species

4.1 Cod otolith weight data

4.2 Cod stomach analyses

4.3 Data requirements from ecosystem surveys

4.4 Historical stock assessment data of cod.

4.5 Status of coastal fish meta-database

5 Fish stock dynamic in the coastal zone

5.1 Environmental effects on coastal fish stocks.

5.1.1 Update of existing knowledge on environmental processes affecting dynamics of coastal

fish species.

5.1.2 Suggestions from the ICES BSRP SGBFFI to the HELCOM Thematic assessment report on

coastal fish

5.2 Data on population structure of non-assessed commercial fish stocks in the Baltic .

5.2.1 Results of the completed studies by fish species

5.2.2 Ongoing research

5.2.3 Ongoing stock assessments of coastal species

5.2.4 Gaps in knowledge.

5.3 Investigation of herring spawning grounds in the Baltic Sea

6 Regional integrated assessment and research organisation in the Baltic Sea within and outside

ICES.

7 Evaluation of first joint SGMAB and SGBFFI meeting

8 Conclusions and recommendations

9 References.

Annex 1: List of participants.

Annex 2: Coastal fish data meta-file.

Annex 3: Draft 2005 Resolution (Category 2)