Détail de l'auteur
Documents disponibles écrits par cet auteur (6)
Ajouter le résultat dans votre panier Affiner la recherche
Article
K. Lesley Szostek, Auteur ; Peter H. Becker, Auteur ; Barbara C. Meyer, Auteur ; Stefan R. Sudmann, Auteur ; Heribert Zintl, AuteurDensity is known to be an important factor in population size regulation. Several mechanisms of density limitation have been identified in colonial birds. We studied competition in Common Terns Sterna hirundo to assess whether the factor limitin[...]
Article
Stefan R. Sudmann, AuteurThe breeding success of two Common Tern colonies in the Lower Rhine area, Germany, declined with increasing nest density during the period 1991 to 1997. On the rafts serving as artificial nesting platforms, the highest nest density was 2.13 clut[...]
Article
Stefan R. Sudmann, AuteurA new project of monitoring Common Terns in inland colonies is designed. Data relevant to the following questions should be collected: numbers of breeding pairs, nest density and breeding success in all colonies and in some colonies also data on[...]
Article
Peter H. Becker, Auteur ; Stefan R. Sudmann, AuteurThe results of a symposium on Common Term conservation held in Wilhelmshaven, Germany, in October 1997 are summarized. In 1996 about 8,500 pairs of Common Tern bred in Germany. The inland population has more than doubled since 1980. However, pop[...]
Article
Stefan R. Sudmann, Auteur ; Frank van Rienen, AuteurA device for spraying dyes onto nearby birds for individually marking without obviously disturbance is described. It can be used in colonies and was successful tested in Common Terns. Up to eight sprayers can be triggered separately by remote co[...]
Article
Stefan R. Sudmann, AuteurWaterbird counts in the Cologne area, Germany in the winters 1993/1994 to 1998/99 showed that large numbers of waterfowl stage and winter on waters used or created by man as well as on more natural waterbodies. During the study period, 39 specie[...]
