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Documents disponibles écrits par cet auteur (18)
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Article
M. M. Benito, Auteur ; P. H. Becker, Auteur ; J. Gonzalez-Solis, Auteur
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B. Limmer, Auteur ; P. H. Becker, Auteur
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F. R. Mattig, Auteur ; H. U. Rosner, Auteur ; K. Giessing, Auteur ; P. H. Becker, AuteurOwing to the international importance of the Wadden Sea for waders and waterfowl a long-term program to monitor chemical contamination of birds breeding in the Wadden Sea has been established in the early 1980s with Oystercatcher (Haematopus ost[...]
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E. Kalmbach, Auteur ; P. H. Becker, AuteurWe investigated chick development and feeding rate in the neotropic cormorant, Phalacrocorax brasilianus, in a colony in Central Chile. The year of our study was characterized by relatively good foraging conditions. Brood sizes varied from two t[...]
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J. Gonzalez-Solis, Auteur ; P. H. Becker, Auteur ; H. Wendeln, Auteur ; M. Wink, AuteurBias in sex ratios at hatching and sex specific post hatching mortality in size dimorphic species has been frequently detected, and is usually skewed towards the production and survival of the smaller sex. Since common terns Sterna hirundo show [...]
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J. D. Ludwigs, Auteur ; P. H. Becker, AuteurDans Ardea (90(3) 2002)Most Common Terns return at the age of two years to their natal colony site and recruit after one or more years prospecting. Whereas this general pattern is known, the mechanisms regulating recruitment are poorly understood. This paper reports o[...]
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J. Gonzalez-Solis, Auteur ; P. H. Becker, Auteur ; L. Jover, Auteur ; X. Ruiz, AuteurIt has been Suggested that breeding performance differs between young and old birds due to the appearance and disappearance of phenotypes through differential survival (selection hypothesis) or differential recruitment (delayed breeding hypothes[...]
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B. Limmer, Auteur ; P. H. Becker, Auteur
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Morphometrics of the pink-footed shearwater (Puffinus creatopus): influence of sex and breeding site
D. Guicking, Auteur ; W. Fiedler, Auteur ; C. Leuther, Auteur ; R. Schlatter, Auteur ; P. H. Becker, AuteurWe present morphometric data for the pink-footed shearwater (Puffinus creatopus) from both Chilean breeding colonies on Isla Mocha and Juan Fernandez: weight, total length, wing length, tail length, head length, three bill and three tarsus size [...]
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J. Gonzalez-Solis, Auteur ; P. H. Becker, AuteurWe investigated courtship feeding and copulatory behaviour of common terns Sterna hirundo in relation to age. We found a significant positive correlation between the number of courtship feedings delivered to females and the number of mountings. [...]
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P. H. Becker, Auteur ; C. C. Voigt, Auteur ; J. M. Arnold, Auteur ; R. Nagel, AuteurWe describe a non-invasive technique to obtain blood samples from incubating birds without trapping and handling. A larval instar of the blood-sucking bug Dipetalogaster maximus (Heteroptera) was put in a hollowed artificial egg which was placed[...]
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P. H. Becker, Auteur ; H. Wendeln, Auteur ; J. Gonzalez-Solis, AuteurDans Ardea (89(1) 2001)From 1992 to 1999, we used subcutaneously injected transponders, enabling remote and automatic annual identification with the aim of performing an integrated population study of a Common Tern sterna hirundo colony. Within a few years, population[...]
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P. H. Becker, Auteur ; H. Zhang, AuteurReplacement clutches may increase the annual reproductive output of individuals and the population, but cause additional effort and may have fitness consequences. Whether longevity and lifetime reproductive success are affected by renesting is u[...]
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J. M. Arnold, Auteur ; S. Oswald, Auteur ; B. Limmer, Auteur ; P. H. Becker, Auteur
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P. H. Becker, Auteur ; S. Bradley, Auteur
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P. H. Becker, Auteur ; M. Wink, AuteurWe studied wing-length, head-bill-length, sternum-length and body mass of Common Tern fledgling cadavers from a colony in Wilhelmshaven on the German North Sea coast, relative to sex, which was determined by PCR. The masses after death indicated[...]
