Abstract
The Offshore Wind Ecological Programme (Wozep), commissioned by the Dutch Ministry of Economic Affairs and Climate to Rijkswaterstaat (RWS), aims to better understand the ecological impacts of offshore wind energy developments. Population models have been developed to assess impacts on certain bird species at the population level. These rely on various life-history parameters. For a number of the species of interest the existing information needed for these models was categorised as poor, which can ultimately limit the reliability of the model outcomes.
The aim of this project was to obtain additional information on survival rates for different life stages of the bird species of interest; specifically, through the analyses of ringing data. This report describes the ringing and colour-ringing data available for the species of interest and the analysis of survival rates for use in the population models that were constructed for these seabird species as part of the Offshore Wind Ecological Programme.