Rapport nr 104: Användning av perifytonfällor för bedömning av fiskodlingars eutrofierande effekt samt undersökning av nya kontroll- och referenspunkter för bottenfaunaprovtagning vid miljökontrollprogrammet för fiskodling på Åland
LASTUNIEMI, M (2002)
LASTUNIEMI, M
Åbo Akademi, Husö biologiska station
2002
Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden.
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Julkaisun pysyvä osoite on
https://urn.fi/URN:ISBN:952-12-0988-7
https://urn.fi/URN:ISBN:952-12-0988-7
Tiivistelmä
Use of periphyton growth plates for monitoring purposes was studied in the summer of 2001
around five fish farms in the Aland archipelago. The gowth plates were incubated for two weeks
and growth of periphyton was measured as the amount of chlorophy/1-a (mglrrf) extracted from the
filters used as growth plates.
Due to loss of filter the results were indistinct but indicated a connection between the amount of fish farmed and periphyton growth. Time of year also seemed to be of importance for the growth of periphyton.
According to proposal by Mehtonen (2000), new control and reference sites were surveyed for benthic fauna control. Species compostition, abundance and biomass of benthic fauna as we/1 as
structure and organic content of the sediment were studied.
The results showed that some of the suggested control and reference sites were not suited for bottom fauna sampling and new sites therefore need to be found.
around five fish farms in the Aland archipelago. The gowth plates were incubated for two weeks
and growth of periphyton was measured as the amount of chlorophy/1-a (mglrrf) extracted from the
filters used as growth plates.
Due to loss of filter the results were indistinct but indicated a connection between the amount of fish farmed and periphyton growth. Time of year also seemed to be of importance for the growth of periphyton.
According to proposal by Mehtonen (2000), new control and reference sites were surveyed for benthic fauna control. Species compostition, abundance and biomass of benthic fauna as we/1 as
structure and organic content of the sediment were studied.
The results showed that some of the suggested control and reference sites were not suited for bottom fauna sampling and new sites therefore need to be found.