Fish communities, biomanipulation and experimental gillnetting : Fish communities in South-Finnish lakes and their responses to biomanipulation assessed by experimental gillnetting

ISBN-13: 9783639089394 / Angielski / Miękka / 2009 / 136 str.

Mikko Olin

Opis

Biomanipulation, by removing planktivorous and benthivorous fish, has proved to be an effective method for restoration of eutrophicated lakes. Despite the increasing knowledge of complex food webs in lakes, problems and uncertainty have remained. Some of the main questions are related to fish and their role in attaining the objectives or sustaining the improvements. This book summarizes the results of a research program that concentrated on the characteristics of the fish community, gillnet test-fishing as a sampling method, and responses to biomanipulation in several South-Finnish lakes. According to this study, fish biomass and community structure can depend, besides on the nutrient concentration, also on the lake area and depth, and turbidity. Effective biomanipulation can change the fish community towards lower dominance of cyprinids and the resultant reduced biomass of cyanobacteria and shortened duration of the blooms.

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O autorze

Born in Helsinki, 1971.
Matriculation, 1990.
Master of Science, 1997.
Doctor of Agriculture and Forestry. University of Helsinki, 2005.
Doctoral researcher in University of Helsinki. Main projects:
Sustainable fishing of perch and pike and the ecosystem effects
of piscivore-fishing. Fish based ecological classification of
lakes.