eesti teaduste
akadeemia kirjastus
Estonian Journal of Ecology
Effect of cyanobacterial blooms on the abundance of the flounder Platichthys flesus (L.) in the Gulf of Finland; 196–208

Tenno Drevs, Andres Jaanus, Ele Vahtmäe

An extensive cyanobacterial bloom in the southern Gulf of Finland was observed from the end of June to the middle of July 2002 with a subsequent decaying phase of algae during 2–3 weeks after the bloom collapse. Aphanizomenon was thepredominating genus in offshore areas, reaching in abundance the absolute maximum of the period 1997–2004. Mainly dead mass of phyto­plankton driven to the coastal waters by wind affected significantly the abundance of 1-year-old flounder. Catch per unit effort of commercial size flounder decreased at several national fishing rectangles that were exposed to strongest cyanobacterial blooms according to satellite images. Strong cyanobacterial blooms were followed by a decrease in the abundance indices of the flounder spawning stock in Estonian waters of the Gulf of Finland.


Anon. 1998. Harmful Algal Blooms in European Marine and Brackish Waters (Granely, E., Codd, G. A, Dale, B., Lipiatou, E., Maestrini, S. Y. & Rosenthal, H., eds). European Commission, Belgium.

 Anon. 2003a. Rannikumere seire. Allprogramm Eutrofeerumine. 2003. a. aruanne. (visited 29 Apr. 2004).

Anon. 2003b. Tervisekaitseserver. (visited 26 March 2003).

Campbell, R. C. 1989. Statistics for Biologists. Press Syndicate of the University of Cambridge.

Drevs, T. 1999. Population dynamics of flounder (Platichthys flesus) in Estonian waters. Proc. Estonian Acad. Sci. Biol. Ecol., 48, 310–320.

Drevs, T. 2000. On the flounder yield and spawning stock medium-term forecasts in Estonian waters. ICES CM 2000/V:02.

Edler, L., Kononen, K. & Kuosa, H. 1996. Harmful algae. In Third Periodic Assessment of the State of Marine Environment of the Baltic Sea, 1989–1993; Background document. Baltic Sea Envir. Proc., 64B, 192–194.

Finni, T., Kokonen, K., Olsonen, R. & Wallström, K. 2001. The history of cyanobacterial blooms in the Baltic Sea. Ambio, 4–5, 172–178.


Fogg, G. E. 2002. Harmful algae – a perspective. Harmful Algae, 1, 1–4.


HELCOM 1988. Guidelines for the Baltic Monitoring Programme for the third stage; Part D. Biological Determinands. Baltic Sea Environ. Proc., 27D.

HELCOM 2003. The Baltic Marine Environment 1999–2002. Baltic Sea Environ. Proc., 87, 19–23.

Jaanus, A. 1997. Fütoplankton. Riiklik keskkonnaseire programm. Mereseire alamprogramm. Eutro­feerumine. 1997. a. aasta-aruanne. Eesti Mereinstituut, Tallinn.

Jaanus, A. & Pellikka, K. 2003. Does increasing phosphorus necessarily cause increasing biomass of diazotrophic cyanobacteria? Proc. Estonian Acad Sci. Biol. Ecol., 52, 205–217.

Kankaanpää, H., Turunen, A.-K., Karlsson, K., Bylund, G., Meriluoto, J. & Sipiä, V. 2005. Heterogeneity of nodularin bioaccumulation in northern Baltic Sea flounders in 2002. Chemosphere, 8, 1091–1097.


Kanoshina, I. 2000. The influence of meteorological conditions and hydrophysical processes to the spatio-temporal variation of the summer phytoplankton bloom development in the Gulf of Finland, Baltic Sea. MSc thesis, University of Tartu, Tartu.

Karlsson, K., Sipiä, V., Kankaanpää, H. & Meriluoto, J. 2003. Mass spectrometric detection of nodularin and desmethylnodularin in mussels and flounders. J. Chromatogr. B, 784, 243–253.


Kiviste, A. 1999. Matemaatiline statistika MS Excel keskkonnas. GT Tarkvara OÜ, Tallinn.

Kotta, I. & Kotta, J. 2003. Merepõhjaloomastiku seire. In Muuga sadama merekeskkonna seire 2003. a., pp.13–27. Tartu Ülikool, Eesti Mereinstituut.

Kotta, J., Kotta, I. & Orav-Kotta, H. 2004. Muuga lahe põhjaloomastik – looduslik muutlikkus ja inimmõju. Estonia Maritima, 6, 53–72.

Mikelsaar, N. 1957. Lesta sigimisbioloogiast Läänemere idaosas. Eesti NSV TA Toim. Biol., VI, 255–264.

Mikelsaar, N. 1958. Flounder of the Eastern Baltic Sea. Cand. Biol. Thesis. Academy of Sciences of the Estonian SSR, Tartu (in Russian).

Mohn, R. K. & Cook, R. 1993. Introduction to sequential population analysis. In Scientific Council Studies, No. 17 (Amaratunga, T., ed.), pp. 47–51. NAFO, Dartmouth.

Ojaveer, E., Simm, M., Balode, M., Purina, I. & Suursaar, Ü. 2003. Effect of Microcystis aeruginosa and Nodularia spumigena on survival of Eurytemora affinis and the embryonic and larval development of the Baltic herring Clupea harengus membras. Environ. Toxicol., 8, 236–242.


Perttila, M. 2003. Assessment. State of the Gulf of Finland in 2002. Meri, 48, 48–55.

Sipiä, V. 2001. Accumulation of cyanobacterial hepatotoxins and okadaic acid in mussel and fish tissues from the Baltic Sea. PhD dissertation. Finnish Institute of Marine Research, Helsinki.

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