The lake Spexhultasjön is a moderate humic mesotrophic lake that is not acidified. The fish fauna was investigated by using a standard method for sampling freshwater fish with multi mesh gill nets. The fish fauna was diverse with perch, pike, tench, common whitefish, and roach. Perch and roach dominated. There were few pikes. The tench were few but big. The common whitefish was caught in deep water. The lake has condition class 2 according to the national environment protection board. The perch has a reproduction disorder. The roach has probably forced the perch into the benthoseating stage to early. A proposal intended to the county administrative board is to increase the production of a predator like pike or pike-pirch. The county administrative board ought to investigate why the share of pike is low and the roaches reproduction disorder.

<p>The lake Spexhultasjön is a moderate humic mesotrophic lake that is not acidified. The fish fauna was investigated by using a standard method for sampling freshwater fish with multi mesh gill nets. The fish fauna was diverse with perch, pike, tench, common whitefish, and roach. Perch and roach dominated. There were few pikes. The tench were few but big. The common whitefish was caught in deep water. The lake has condition class 2 according to the national environment protection board. The perch has a reproduction disorder. The roach has probably forced the perch into the benthoseating stage to early. A proposal intended to the county administrative board is to increase the production of a predator like pike or pike-pirch. The county administrative board ought to investigate why the share of pike is low and the roaches reproduction disorder.</p>

Östersjön är ett stressat hav som i stor utsträckning påverkas av mänskliga aktiviteter, och under de senaste 100 åren har mycket i ekosystemet förändrats. I Östersjön har blåstången en viktig och dominerande roll på grunda hårdbottnar, då den bildar sammanhängande vegetationsbälten som utgör habitat för andra organismer. I mitten på 70-talet kom rapporter om att blåstångens utbredning minskade och senare också att fisksamhället förändrades. Blåstången var förr ett viktigt inslag som t ex jordförbättringsmedel och fisket var en stor och viktig näring för ortsbefolkningen på Öland. Dokumentation om hur ekosystemet utmed Ölands östra kust såg ut innan 70-talet är dock begränsad. För att få fram en beskrivning av hur kusten har förändrats sedan 1930-talet har en kvalitativ intervjustudie genomförts med personer som levt och verkat vid Ölands östra kust. Undersökningsgruppen bestod av 13 personer i åldrarna 70-90 år, alla med någon slags anknytning till jordbruk eller fiske. Intervjuerna tog i genomsnitt 90 minuter och genomfördes under januari och februari månad 2006. Alla de intervjuade kunde berätta om förändringar i alg- och fisksamhället. Till exempel upplevdes algerna som ett bekymmer i fiskeredskapen och fiskfångsten minskade. Utöver resultatet av intervjustudien har en nutida miljöundersökning bidragit till att ge en bredd i beskrivningen till 2015. Mycket har förändrats och därmed påverkat alg- och fisksamhället i Östersjön sedan 30-talet. Genom att göra delvis strukturerade intervjuer med människor som levt och verkat längs Ölands östra kust ville jag få fram en tydligare bild av utvecklingen än vad som hittills funnits dokumenterad. Speciellt har jag fokuserat på förändringar i fisksamhället och på förekomsten av blåstång från 1930-talet och framåt. / The Baltic Sea is under severe stress which is mainly caused by human activities and for the past 100 years, much of the ecosystem has changed. The bladderwrack (Fucus vesiculosus) has a key role in shallow rocky shores where it can cover large areas forming belts from a few decimeters below the surface to a depth of several meters. These habitats serve as shelter and nursery for many fish and invertebrate species. In the mid-70s bladderwrack started to decline in some Baltic coastal areas, and later also the fish communities changed in these areas. In the past, bladderwrack was used by local farmers on Öland to improve and fertilize soils and coastal fishing was a comparatively large and important industry for people living on the island. There is limited information on how the status of the ecosystem (e.g. distribution of bladderwrack and status of coastal fish communities) along Öland's eastern coast was before the 70s. To obtain a description of how the coastal ecosystems have changed since the 1930s, qualitative interviews were carried out with people who lived and worked on Öland's eastern coast. The study group consisted of 13 persons aged 70-90 years, all with some sort of connection to agriculture or fishing. Each interview took on average 90 minutes and was conducted during January and February 2006. By making the semi-structured interviews with people who lived and worked along Öland's east coast, I wanted to bring out a clearer picture of changes in coastal fish and macroalgal communities than previously has been documented. Specifically, I have focused on changes in the fish community and the occurrence of bladder wrack from the 1930s onwards. All the people interviewed had experienced and could tell about changes in algal and fish community. They describe a decline in the catches of several fish species, a decline in bladderwrack communities and a simultaneously increase of filamentous algae both on the shores and as epiphytes on fishing gears. In addition to the results of the interview study I have used more recent reports and research papers to discuss the result.