Henna Yliluikki, Novia University of Applied Sciences, University of Turku, Tammisaari, Finland, Katja Anttila, University of Turku, Biology, Turku, Finland, Ursula Strandberg, University of Eastern Finland, Joensuu, Finland and Jonna Engström-Öst, Novia University of Applied Sciences, Tammisaari, Finland