Fish have the natural behaviour to move across various aquatic ecosystems and for some species this is of vital importance. Migration is often a seasonal phenomenon which occurs in order to move between habitats, such as winter refuges-, foraging- and spawning or nursery habitats, also escaping unfavourable …

With the increase of offshore activities in the Arctic, the question arises if currently existing oil spill response plans involve effective methods for removing oil slicks in Arctic conditions. The dispersant Corexit9500 is commonly applied as response agent to disperse oil slicks. It has been applied …

The harbour porpoise Phocoena phocoena is one of the smallest odontocetes, rarely reaching a length of 1.8 meters. Harbour porpoises are the most numerous cetacean in the North Sea. Over the past years, the harbour porpoise population has shifted from the northern part towards the southern part of the …

Harbour porpoises (Phocoena phocoena) are the smallest cetaceans in the North Sea. They have recovered from being rare to nowadays being present throughout the year in numbers reaching to 80 000 in the Dutch sector or the North Sea. The only area where studies were conducted prior to the disappearance …

This bachelor thesis reports on a study conducted at the research institute IMARES in the Netherlands. It focused on plastics ingested by northern fulmars (Fulmarus glacialis) around the North Sea region as a contribution to a better understanding of the fulmar in its role as an indicator for marine …

In this study, diets of 155 beached and by-caught harbour porpoises were reconstructed from the contents of their stomachs. The objective was to investigate whether different energy requirements of adult males and females during their lives translate into lasting differences in diets.