Effect of food abundance on laying date and clutch size in the White Stork<i>Ciconia ciconia</i>

Tortosa, Francisco S.; Pérez, Lorenzo; Hillström, Lars

doi:10.1080/00063650309461302

Cited by 53 publications

(43 citation statements)

References 21 publications

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“…The link between nest occupation date and productivity can be spatially complex and vary between years (Gordo et al 2013). Mean clutch size recorded in our study was equal or higher than previously reported in Europe (Tortosa et al 2003;Profus et al 2004;Kosicki 2010), suggesting highly favorable feeding conditions in our study area (Tortosa et al 2003). Brood reduction was positively related to the number of hatchlings with most chicks dying 1-2 weeks after hatching (N.B., unpublished data; Kosicki 2012).…”

Section: Breeding and Growth Parameterscontrasting

confidence: 57%

Factors affecting growth parameters of White Stork nestlings in eastern Algeria

et al. 2015

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International audienceSurvival and reproduction of young can be affectedby growth parameters. It is thus important to estimateintraspecific growth rate variability andenvironmental factors affecting growth to better understandthe dynamics of populations and the potential impacts ofenvironmental changes. Growth parameters of White Stork(Ciconia ciconia) nestlings were estimated in eastern Algeria,in the southern part of the species’ range. A total of2,756 measurements of 65 nestlings from 18 nests weretaken for body mass, and tarsus, wing and bill lengths.Individual growth data were used to investigate the effectsof nest occupation date, laying and hatching dates, clutchsize, number of hatchlings, productivity, hatching order,and brood reduction on nestling growth patterns. Bodymass and bill length growth rates were lower in the studiedpopulation than in a more northerly White Stork population.This supports the hypothesis of a geographic variationin intraspecific growth parameters. Chicks from nests occupiedearly reached higher asymptotic body mass buttended to grow more slowly. However, chicks from latearriving birds compensated for the difference in body mass and wing length by higher growth rates. Wing length wassignificantly affected by asynchrony and hatching order.Last hatched chicks had larger asymptotic wing lengths,lower wing growth rates and longer growth periods. Wingsof nestlings from highly asynchronous broods grew fasterbut took more time to attain the inflection point. Broodreduction had a negative effect on nestling bill length athatching. Chicks from nests with little brood reduction hada longer bill at hatching than nestlings from nests with highbrood reduction

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Section: Breeding and Growth Parameterscontrasting

confidence: 57%

Factors affecting growth parameters of White Stork nestlings in eastern Algeria

et al. 2015

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“…However, it is difficult to imagine how this can affect reproduction in Spanish white storks since the period between arrival and laying dates notably exceeds that recorded for eastern European populations (about 15 days; Tryjanowski et al 2004). Furthermore, the guaranteed food supplies from rubbish dumps throughout the breeding season would diminish the importance of an early return (Tortosa et al 2002(Tortosa et al , 2003Massemin-Challet et al 2006). These strong differences force us to stress more caution when results for the better studied eastern European populations are extrapolated to the Iberian populations, because both groups are probably under different ecological pressures as a result of the environmental peculiarities of their breeding, wintering and passage areas (Bernis 1959).…”

Section: Discussionmentioning

confidence: 95%

Spatial patterns of white stork (Ciconia ciconia) migratory phenology in the Iberian Peninsula

2007

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In contrast to the attention attracted by temporal trends of phenology, the spatial patterns of arrivals, departures or stays of trans-Saharan birds are still nowadays largely unknown in most of their European breeding areas. In the case of the white stork (Ciconia ciconia), some studies have attempted to describe its migratory patterns throughout some European countries but, to our knowledge, no one has related these patterns to some kind of explanatory variable which offers an ecologically-based explanation for the heterogeneous phenology observable among populations. Here, arrivals, departures and stays of this species, recorded in hundreds of Spanish localities, were related to a set of environmental, geographical, biological and spatial predictors, and modeled by multiple regression. The best model for arrival dates accounted for up to 34% of variability of data and pointed towards an earlier arrival in those populations located in south-western Iberia and with higher population densities. This last relationship is probably due to the competition for nest-site fidelity maintenance. However, no variable was able to explain properly the blurred spatial pattern recorded for departure dates. Departure decisions are strongly influenced by social behavior in this species and depend on collective decisions influenced by peculiar local environmental conditions of each year rather than macrogeographical gradients. Environmental, geographical or spatial variables also did not capture much of the observed variability in the length of the stays among populations. However, this variable was strongly related to the arrival and departure dates of populations. White storks stay longer in localities with earlier arrivals and, especially, later departures.

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“…The hydrological network density and the distance from the nest to the nearest cultivated arable field reflect foraging conditions on the breeding grounds. The amount of available food is known as a very important environmental parameter affecting breeding success in White Storks (Tryjanowski and Kuźniak 2002;Tortosa, Pérez, and Hillström 2003;Denac 2006). The fact that the nest-site is of equal importance with foraging conditions emphasizes the significance of this parameter for breeding success.…”

Section: Discussionmentioning

confidence: 99%

Possible effects of electromagnetic field on White StorksCiconia ciconiabreeding on low-voltage electricity line poles

Vaitkuvienė

Dagys

2014

Zoology and Ecology

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In this study, we analyzed the breeding success of the White Stork (Ciconia ciconia) in nests built on poles of lowvoltage overhead electricity lines (OEL). Many previously conducted studies have shown the negative impact of the electromagnetic field (EMF) on bird breeding success. Over the past few decades, in many European countries, White Storks have been increasingly observed building their nests on poles of OEL, with electricity lines functioning as a nest support. This means that there is a growing tendency for their nests to be located in zones of increased electromagnetic pollution. Our study results showed that the most significant factors influencing the breeding success of White Storks nesting on poles of OEL are the nest-site, hydrological network density, and distance to arable land. The analysis of White Stork breeding success in the nests built on poles of operating and non-operating OEL revealed a significant difference. Breeding success in the nests having direct contact with electricity lines was found to be the lowest. Our study results suggest that even low-voltage electricity current-generated EMF can produce a significant negative effect on the breeding success of birds nesting directly on electricity lines.Išanalizuotas baltųjų gandrų Ciconia ciconia perėjimo sėkmingumas ant žemos įtampos elektros oro linijų sukrautuose lizduose. Daugelyje ankstesnių tyrimų buvo nustatytas neigiamas elektromagnetinio lauko poveikis paukščių perėjimo sėkmingumui. Europos šalyse per pastaruosius kelis dešimtmečius baltieji gandrai lizdus vis dažniau krauna ant elektros oro linijų atramų. Elektros laidai tampa atrama lizdams, jie sukraunami didesnio elektromagnetinio užterštumo zonoje. Tyrimo rezultatai parodė, kad gandrams perint ant elektros oro linijų atramų, perėjimo sėkmingumą įtakojantys svarbiausi veiksniai yra lizdo vieta, hidrologinio tinklo tankumas ir atstumas iki dirbamos žemės. Lizduose, sukrautuose ant eksploatuojamų ir nebeeksploatuojamų elektros oro linijų atramų, perėjimo sėkmingumas reikšmingai skyrėsi. Mažiausias perėjimo sėkmingumas buvo lizduose, besiliečiančiuose su elektros laidais. Šio tyrimo rezultatai leidžia teigti, kad net ir žemos įtampos (0,4 kV) sukuriamas elektromagnetinis laukas gali turėti reikšmingą neigiamą poveikį tiesiai ant elektros laidų įsikuriančių paukščių perėjimo sėkmingumui.

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Effect of food abundance on laying date and clutch size in the White StorkCiconia ciconia

Cited by 53 publications

References 21 publications

Factors affecting growth parameters of White Stork nestlings in eastern Algeria

Factors affecting growth parameters of White Stork nestlings in eastern Algeria

Spatial patterns of white stork (Ciconia ciconia) migratory phenology in the Iberian Peninsula

Possible effects of electromagnetic field on White StorksCiconia ciconiabreeding on low-voltage electricity line poles

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