Acknowledgments This work was supported by FEDER through COMPETE – Programa
Operacional Factores de Competitividade and by national funding through Fundação para a Ciência e Tecnologia (FCT),within the research project FCOMP-01-0124-FEDER-013934.
Thanks are also given to the Centre for Environmental and Marine Studies (project Pest-C/MAR/
LA0017/2013) and to the Department of Biology of the University of Aveiro.