The Effects of Recent Eutrophication on Freshwater Fish

0,65

MB

Communities and Fishery on the Northern Coast of the Gulf of

24

stron

Finland, Baltic Sea

4433

ID

University of Helsinki

2002

rok

Contents

Abstract . 4

Original articles and author’s contribution 5

Introduction . 7

Marine eutrophication and the Baltic Sea 7

Eutrophication of the Gulf of Finland 7

Changes in fi sh communities in the Baltic Sea 8

Marine species . 8

Migratory species . 9

Freshwater species . 9

Eutrophication and fi sh communities in lakes; general trends . 9

Fishery in the northern Gulf of Finland . 10

Aims and research strategies 10

Material and methods . 11

Study area 11

Methods for collecting fi sh community data . 11

Methods for collecting fi shery data 13

Results and discussion . 13

General discussion . 19

Acknowledgements 20

References . 21