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International shipping comprises an environmental risk: import of ecosystem foreign, and potentially harmful and disease-causing organisms, called non-indigenous species (NIS). One of the main vectors of introduction of NIS in ports is discharged ballast water of ships.

This study reports on bryozoan species collected at three offshore gas platforms in the Dutch part of the North Sea. Four out of thirteen observed species are considered as rare in the Netherlands, whereas Cribrilina punctata is a new species for Dutch waters.

Testen en ontwikkelen van een stroomgoot voor het scheiden van macrozoöbenthos van grof sediment