I study how warmer winters, as a consequence of climate change, affect predator-prey interactions and early life-history performance in fish, mainly brown trout (Salmo trutta), Atlantic salmon (Salmo salar) and burbot (Lota lota). My main focus is fish behavior, but I am also interested in physiological stress responses and gene expressions. In addition, I have also been involved in projects aimed to examine the effects that parasitic larvae of the endangered freshwater pearl mussel (Margaritifera margaritifera) have on brown trout.
Undergraduate and masters courses in scientific methods in freshwater ecology. Sampling and studying abiotic conditions, plankton, benthos and fish in both streams and lakes. Taxonomic identification of marine and freshwater organisms. Undergraduate courses in behavioral and community ecology.
Karl Filipsson; Tina Petersson; Johan Höjesjö; John J. Piccolo; Joacim Näslund; Niklas Wengström; E. Martin Österling (2018). Heavy loads of parasitic freshwater pearl mussel (Margaritifera margaritifera L.) larvae impair foraging, activity and dominance performance in juvenile brown trout (Salmo trutta L.). Ecology of Freshwater Fish 27: 70-77.
Karl Filipsson; Jeroen Brijs; Joacim Näslund; Niklas Wengström; Marie Adamsson; Libor Zavorka; E. Martin Österling; Johan Höjesjö (2017). Encystment of parasitic freshwater pearl mussel (Margaritifera margaritifera) larvae coincides with increased metabolic rate and haematocrit in juvenile brown trout (Salmo trutta). Parasitology Research 116: 1353 -1360.