Harbour porpoises : laboratory studies to reduce bycatch

Consists of six papers, entitled: Acoustic signals by harbour porpoises (Phocoena phocoena) / W.C. Verboom and R.A. Kastelein. - Source levels and echolocation signal characteristics of juvenile harbour porpoises (Phocoena phocoena) in a pool / A.D. Goodson, R.A. Kastelein and C.R. Sturtivant. ...