Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014
In summer 2014, the ecological status of the fish community in the lakes Markusbölefjärden and Vargsundet on the Åland Islands was investigated according to the EU Water Framework Directive. Bottom-set gillnets were used for fishing and hydrographical parameters were measured at the fishing sites. T...
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Åbo Akademi, Husö biologiska station
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ftdoria:oai:www.doria.fi:10024/167365 2023-05-15T15:47:18+02:00 Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014 Investigation of the fish community in the Lake Markusbölefjärden and the Lake Vargsundet 2014 WIKLUND, H 2014 PDF http://www.doria.fi/handle/10024/167365 sv swe Åbo Akademi, Husö biologiska station http://www.doria.fi/handle/10024/167365 URN:ISBN:978-952-12-3156-8 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. Forskningsrapport 2014 ftdoria 2019-09-08T08:21:41Z In summer 2014, the ecological status of the fish community in the lakes Markusbölefjärden and Vargsundet on the Åland Islands was investigated according to the EU Water Framework Directive. Bottom-set gillnets were used for fishing and hydrographical parameters were measured at the fishing sites. The number of bottom-set gillnets was higher than in the earlier investigations of lakes on Åland. In the Lake Vargsundet, a vertical profile was also sampled using pelagic gillnets. The ecological status of the lakes was classified as high, good, moderate, poor or bad. The ecological status of the fish community in the Lake Markusbölefjärden was classified as good, and in the Lake Vargsundet it was classified as high. One indicator species for high water quality, burbot (Lota lota L.) was found in the Lake Vargsundet. Variables used in previous investigations, such as fish community, physical-chemical factors, phytoplankton, aquatic plants and benthos, were included in the current overall classification of the lakes. Some of the values of the previous investigations were recalculated according to the new reference values so that they could be compared with the values from 2014. The resulting overall classification gave the Lake Markusbölefjärden a moderate ecological status and the Lake Vargsundet a good ecological status. As a recommendation for future investigations, use of gillnets by European standard protocol, instead of gillnets used in this investigation (Surveynet Coastal), is advised. Report Burbot Lota lota lota Doria (National Library of Finland) |
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Open Polar |
collection |
Doria (National Library of Finland) |
op_collection_id |
ftdoria |
language |
Swedish |
description |
In summer 2014, the ecological status of the fish community in the lakes Markusbölefjärden and Vargsundet on the Åland Islands was investigated according to the EU Water Framework Directive. Bottom-set gillnets were used for fishing and hydrographical parameters were measured at the fishing sites. The number of bottom-set gillnets was higher than in the earlier investigations of lakes on Åland. In the Lake Vargsundet, a vertical profile was also sampled using pelagic gillnets. The ecological status of the lakes was classified as high, good, moderate, poor or bad. The ecological status of the fish community in the Lake Markusbölefjärden was classified as good, and in the Lake Vargsundet it was classified as high. One indicator species for high water quality, burbot (Lota lota L.) was found in the Lake Vargsundet. Variables used in previous investigations, such as fish community, physical-chemical factors, phytoplankton, aquatic plants and benthos, were included in the current overall classification of the lakes. Some of the values of the previous investigations were recalculated according to the new reference values so that they could be compared with the values from 2014. The resulting overall classification gave the Lake Markusbölefjärden a moderate ecological status and the Lake Vargsundet a good ecological status. As a recommendation for future investigations, use of gillnets by European standard protocol, instead of gillnets used in this investigation (Surveynet Coastal), is advised. |
format |
Report |
author |
WIKLUND, H |
spellingShingle |
WIKLUND, H Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014 |
author_facet |
WIKLUND, H |
author_sort |
WIKLUND, H |
title |
Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014 |
title_short |
Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014 |
title_full |
Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014 |
title_fullStr |
Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014 |
title_full_unstemmed |
Rapport nr 138: Undersökning av fiskbestånden i Markusbölefjärden och Vargsundet 2014 |
title_sort |
rapport nr 138: undersökning av fiskbestånden i markusbölefjärden och vargsundet 2014 |
publisher |
Åbo Akademi, Husö biologiska station |
publishDate |
2014 |
url |
http://www.doria.fi/handle/10024/167365 |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_relation |
http://www.doria.fi/handle/10024/167365 URN:ISBN:978-952-12-3156-8 |
op_rights |
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. |
_version_ |
1766382079004639232 |