ABSTRACT
Several studies on harbour porpoise diets in the northeast Atlantic have revealed geographical variation in the main prey consumed (in the UK, Martin 1996, Santos 1998; in Norway, Denmark and Sweden, Aarefjord et al. 1995, Berggren 1996; in Germany, Lick 1991a,b, Benke & Siebert 1996; in Ireland, Rogan & Berrow 1996). One caveat is that not all of these studies were contemporaneous and the confounding effect of temporal shifts in diet cannot always be ruled out.
