Journal ArticleDOI
Effect of food abundance on laying date and clutch size in the White Stork Ciconia ciconia
TLDR
The results support the hypothesis that food availability independently affects both laying date and clutch size and suggest that a progressive deterioration of natural food sources is the most probable reason for a decline in clutch size as the season advances.Abstract:
CapsuleFood independently affects both laying date and clutch size, suggesting that seasonal decline in clutch size is related to a decrease in food availability. Aim To test the effect of food abundance on laying date and clutch size of the White Stork and identify the cause of seasonal decline in the number of eggs laid. Methods During 1991 and 1996 we recorded clutch size and laying date of pairs breeding next to rubbish dumps (food abundant and constant throughout the breeding season) and birds breeding far from rubbish dumps (using natural food sources). Results In 1991 there was no difference in mean laying date between pairs nesting at rubbish dumps and control pairs. Clutch size was significantly larger at rubbish dump nests. In contrast, mean laying date was earlier in control pairs in 1996 and there was no significant differences in clutch sizes, even when controlling for laying date effect. Conclusion The results support the hypothesis that food availability independently affects both laying da...read more
Citations
More filters
Journal ArticleDOI
How are garbage dumps impacting vertebrate demography, health, and conservation?
TL;DR: The spatial and temporal effects of rubbish dumps on wildlife should be evaluated more deeply at a worldwide scale considering current differences in waste production from developing to developed countries.
Journal ArticleDOI
Are white storks addicted to junk food? Impacts of landfill use on the movement and behaviour of resident white storks (Ciconia ciconia) from a partially migratory population
Nathalie I. Gilbert,Ricardo A. Correia,Ricardo A. Correia,João P. Silva,Carlos Pacheco,Inês Catry,Inês Catry,Philip W. Atkinson,Jenny A. Gill,Aldina M. A. Franco +9 more
TL;DR: This study provides first confirmation of year-round nest use by resident white storks and is the first to quantify the extent and consistency of landfill attendance by individuals during the non-breeding and breeding seasons and the influence of landfill use on daily distances travelled, percentage of GPS fixes spent foraging and non-landfill foraging ranges.
Journal ArticleDOI
The effect of migration strategy and food availability on White Stork Ciconia ciconia breeding success
Sylvie Massemin-Challet,Jean-Paul Gendner,Sébastien Samtmann,Lorien Pichegru,Anita Wulgué,Yvon Le Maho +5 more
TL;DR: In this article, the influence of bird status (resident vs. migrant) and food availability (control nests vs. nests that benefit from high food supply) on reproductive success of Ciconia ciconia was investigated.
Journal ArticleDOI
Foraging ecology of bald eagles at an urban landfill
TL;DR: The Vancouver landfill was not a major energy source for eagles, in part because their foraging is inefficient due to the large number of potential pirates.
Journal ArticleDOI
Arrival date, age and breeding success in white stork Ciconia ciconia
TL;DR: It was shown that age was the factor most closely related to arrival date and breeding success, and food availability in the study area throughout the breeding cycle could be the factor mitigating differences in clutch size and nestling success related to individual arrival date.
References
More filters
Journal ArticleDOI
Food as a limit on breeding birds: a life-history perspective
TL;DR: Evidence for food limitation in the context of life history theory is reviewed because it provides a fundamental framework from which to interpret.
Journal ArticleDOI
Food supplementation experiments with terrestrial vertebrates: patterns, problems, and the future
TL;DR: The typical population response to food supplementation was two- to three-fold increase in density, but no change in the pattern of population dynamics, which points to the need for researchers to conduct food supplementation experiments in tropical environments.
Food supply and the annual timing of avian reproduction
TL;DR: It is shown that with constraints on parental investment, optimal clutch sizes should decline with season when egg reproductive value declines, independent on the nature of the constraining and proximate control mechanisms.
Journal ArticleDOI
Family planning in the kestrel (Falco tinnunculus): the ultimate control of covariation of laying date and clutch size
TL;DR: Plasma prolactin data of female kestrels show that this hormone is a serious candidate for a physiological component relaying time of year in the authors' model for clutch size regulation, which incorporates an increasing tendency to incubate the first eggs with progression of the season.
Journal ArticleDOI
The seasonal decline in tree swallow clutch size: physiological constraint or strategic adjustment?'
David W. Winkler,Paul E. Allen +1 more
TL;DR: The physiological condition and body size of 184 female Tree Swallows nesting near Ithaca, New York in 1993, 1994, and 1995 were analyzed and it was found that female age and wing length were the only significant predictors of laying date and thatfemale age and laying date were theOnly significant predictor of clutch size.
Related Papers (5)
Effect of Rubbish Dumps on Breeding Success in the White Stork in Southern Spain
Population dynamics of the White Stork Ciconia ciconia in western France
Age‐related environmental sensitivity and weather mediated nestling mortality in white storks Ciconia ciconia
Roger Jovani,José Luis Tella +1 more