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Organic hero. Pike and other large predatory fish reduce the effects of eutrophication so that underwater forests can survive. Photo: Tobias Dalin
Predatory fish give out healthier bays
sLarge stocks of predatory fish produce fewer filamentous algae and increase the incidence of large vegetation. A new international study shows that this, in turn, provides healthy habitats that benefit fish and humans alike.
The study again highlights the great importance of predatory fish to our waterways, not least in the Baltic Sea, where eutrophication is a widespread problem.
“The more predatory fish, the less microalgae.”
Based on small-scale experimental studies, we suspected that predatory fish might be resistant to the negative effects of feeding in coastal areas of the Baltic Sea. In this study, we succeeded in showing that this is the case, and that this is a powerful effect. Dr. Serena Dunady, Researcher at SLU Aqua.
The study, conducted by Stockholm University, the Swedish University of Agricultural Sciences and the University of Groningen, examined the food tissue of 32 Baltic coasts. The results show, among other things, that chick and pike reduce the occurrence of large ripples, which benefit crustaceans and insects, and thus eat more microalgae. This means that the larger plants, important to the coastal ecosystem of the Baltic Sea, can proliferate.
The conclusion is that predatory fish contribute to better habitats and better water quality, which greatly affects both recreational and commercial fishing
Read more about studying Here.
Read the scientific article Here.