Follow the fish: do harbour porpoises (Phocoena phocoena) respond to better water quality up rivers?
Leopold, M.F.; Solé, L.; IJsseldijk, L.L.; Dijkman, E.; Jauniaux, T.; Haelters, J. (2015). Follow the fish: do harbour porpoises (Phocoena phocoena) respond to better water quality up rivers?, in: Leopold, M.F. Eat and be eaten: porpoise diet studies. pp. 113-135