Marine mammal surveys in Dutch waters in 2014

Abstract

In July 2014 aerial surveys to estimate the abundance of Harbour porpoises Phocoena phocoena on the Dutch Continental Shelf were conducted. In total, 229 sightings of 273 individual Harbour Porpoises were collected. Porpoise densities varied between 0.37-3.08 animals/km² in the (four) different areas. The overall density on the entire Dutch Continental Shelf was 1.29 animals/km²