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Documents disponibles écrits par cet auteur (7)
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Article
E. H. Chin, Auteur ; O. P. Love, Auteur ; A. M. Clark, Auteur ; T. D. Williams, AuteurIn sexually size-dimorphic species, the larger sex can be more sensitive to stressful environmental conditions, often resulting in reduced growth and elevated mortality rates. Development of the immune system is regarded as highly resource depen[...]
Article
N. Warnock, Auteur ; M. A. Bishop, Auteur ; J. Takekawa, Auteur ; T. D. Williams, Auteur
Article
T. D. Williams, Auteur ; J. K. Christians, AuteurReproductive performance varies with age in a wide range of organisms, and increasingly such patterns are interpreted in terms of state-dependent models. We sought to characterise 'state' with regards to age-related variation in clutch size, egg[...]
Article
J. K. Christians, Auteur ; T. D. Williams, AuteurEgg mass shows large intraspecific variation in birds and is repeatable within individuals. The mechanisms underlying this variation are unknown. We hypothesized that measures of egg quality (the mass of yolk protein, yolk lipid, and albumen pro[...]
Article
D. J. Moore, Auteur ; T. D. Williams, Auteur ; R. D. Morris, AuteurWe assessed the nutritional importance of male provisioning to females during egg production and its effects on clutch parameters (egg size, length of the laying period) in Common Terns Sterna hirundo: (1) we estimated the costs of egg productio[...]
Article
T. D. Williams, Auteur ; C. J. Martyniuk, AuteurChanges in tissue masses associated with egg production were investigated in female Zebra Finches Taeniopygia gutatta using dietary and hormonal manipulations. We tested three hypotheses: that changes in organ masses, (a) reflect utilisation of [...]
Article
K. G. Salvante, Auteur ; T. D. Williams, AuteurDaily variation in circulating levels of the avian yolk precursor, vitellogenin (VTG), throughout the laying cycle was investigated in female zebra finches Taeniopygia guttata and compared with predicted ovarian follicle demand (based on a model[...]
