A decade of harbour porpoise occurrence in German waters—Analyses of aerial surveys, incidental sightings and strandings

Siebert, Ursula; Gilles, Anita; Lucke, Klaus; Ludwig, Martje; Benke, Harald; Kock, Karl-Hermann; Scheidat, Meike
Journal of Sea Research (2006)

Data on the occurrence of harbour porpoises (Phocoena phocoena) in German waters from 1988 to 2002 were collected from dedicated aerial surveys, incidental sightings and strandings. Aerial surveys conducted in…


Diet overlap between harbour porpoise and bottlenose dolphin: An argument in favour of interference competition for food?

Spitz, Jérôme; Rousseau, Yann; Ridoux, Vincent
Estuarine, Coastal and Shelf Science (2006)

In aquatic ecosystems, competitive interactions are occasionally described. Violent attacks on harbour porpoises by bottlenose dolphins were reported and it was proposed that this behavior could result from competitive interactions…