An analysis has been made of the cohesion between the number of breeding Sandwich Terns and availability of pelagic fish. The diet of the terns and the breeding parameters are dealt with. Further more the method of research, radio tracking, is explained.
auteur(s): Institute for Forestry and Nature Research = Instituut voor Bos- en Natuuronderzoek (IBN-DLO); A. Brenninkmeijer, E.W.M. Stienen