Effect of Rubbish Dumps on Breeding Success in the White Stork in Southern Spain

Tortosa, Francisco S.; Caballero, José L.; Reyes-López, Joaquı́n

doi:10.1675/1524-4695(2002)025[0039:eordob]2.0.co;2

Cited by 115 publications

(115 citation statements)

References 9 publications

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“…This hypothesis was also supported by food supplementation experiments which demonstrated that, at least in some populations, reproductive success of white storks is limited by the food availability during the breeding season (Djerdali et al 2008). Similarly, it was found that stork pairs occupying territories with unlimited anthropogenic food supplies and negligible intra-specific competition (e.g., near rubbish dumps) had higher reproductive success in comparison to pairs that exploited natural food resources, even if their territories were of good quality (Tortosa et al 2002;Massemin-Challet et al 2006). We also found a tendency for the negative density-dependent effects to occur during the years of delayed population arrival at breeding grounds, which further supports the link between the phenology of spring migration and spatial patterns of productivity within the populations of white stork.…”

Section: Discussionmentioning

confidence: 77%

Timing of arrival at breeding grounds determines spatial patterns of productivity within the population of white stork (Ciconia ciconia)

2013

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Early arrival at breeding grounds have important fitness consequences for migratory birds, both at individual and population level. The aim of this study was to investigate how the timing of arrival at the breeding territories affects the spatial patterns of reproductive success within a population of white storks (Ciconia ciconia). Data were gathered annually for ca. 200 pairs of storks breeding in central Poland between 1994 and 2011. Geostatistical analysis of data indicated that in years of delayed arrival of the population (measured by the first quartile arrival date), the reproductive output of storks was negatively autocorrelated, which indicated that there was a tendency for pairs of high breeding success to neighbour with pairs of low success. By contrast, in years when first storks returned in early dates to the breeding grounds, their reproductive success did not show any kind of spatial autocorrelation. These results suggest that delayed return of the first-arriving storks of the population may increase intensity of intra-specific competition to the level at which high-quality breeding pairs monopolize most of available resources at the expense of neighbouring lowquality pairs, which have lower reproductive success as a consequence. Such hypothesis was further supported with the analysis of nesting densities, showing that the latearriving breeding pairs incurred greater fitness costs (or derived lower fitness benefits) while breeding in high densities comparatively to the early-arriving conspecifics.

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Section: Discussionmentioning

confidence: 77%

Timing of arrival at breeding grounds determines spatial patterns of productivity within the population of white stork (Ciconia ciconia)

2013

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“…The food provided by garbage seems to affect migrating habits of White Storks (Tortosa et al 1995). Breeding performance is also known to be affected by food availability at dumps as reported in the White Stork (Tortosa et al 2002) and Herring Gulls Larus argentatus (Pons & Migot 1995).…”

Section: Resultsmentioning

confidence: 99%

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

Tortosa¹,

Pérez²,

Hillström³

2003

Bird Study

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“…Este porcentaje es bajo si lo comparamos con el 34% de avistamientos obtenidos en una población estudiada en la provincia de Córdoba entre 1990 y 2001 (n = 145 pollos anillados), cuyas áreas de cría también se situaban próximas a vertederos (ver Tortosa et al, 2002). Una tasa de avistamiento/recuperación baja podría explicarse por una mayor tasa de mortalidad en la población de cigüeñas de Navarra en comparación a otras poblaciones, lo cual, por otro lado, parece poco probable.…”

Section: Discussionunclassified

“…El uso de los vertederos también se observó para las cigüeñas que más se alejaron de su colonia origen. Esto sugiere que el alimento hallado en vertederos no solo puede tener un papel importante en la productividad de las parejas reproductoras (Tortosa et al, 2002), sino también en el sustento de las aves invernantes y/o migratorias (Sanz-Aguilar et al, 2015;Flack et al, 2016) y en el mantenimiento de tasas altas de supervivencia en juveniles. No obstante, en nuestro estudio se pone de manifiesto la existencia de un mayor esfuerzo de muestreo en vertederos en relación a otro tipo de há-bitats, como por ejemplo cultivos o humedales, para los que se conoce la abundante presencia de cigüeñas.…”

Section: Discussionunclassified

“…Tal es el caso de varias especies de gaviotas, garzas y cigüeñas en relación a los vertederos (Tortosa et al, 2002;Ramos et al, 2009;Arizaga et al, 2013). Los efectos de estos recursos sobre diversos aspectos de la biología y ecología de dichas especies, entre ellos la tendencia de crecimiento de sus poblaciones así como los patrones de movimiento y distribución espacial, tienen interés tanto desde un punto de vista científico como administrativo (gestión de especies y poblaciones) (Blanco, 1996;Tortosa et al, 2002;Arizaga et al, 2014).…”

Section: Introductionunclassified

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Primeros datos sobre movimientos de cigüeñas blancas Ciconia ciconia L., 1758 anilladas como pollos en nido en Navarra: 2012-2015

Resano‐Mayor¹,

Barbarin²,

Alonso³

et al. 2016

Munibe, Cienc. nat.

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ResumenEn las últimas décadas, la población reproductora de cigüeña blanca Ciconia ciconia L., 1758 en Navarra ha aumentado exponencialmente. La abundancia de comida predecible en vertederos, que proporcionan uno de los recursos tróficos más utilizados por la especie, parece haber tenido influencia tanto a nivel demográfico como en la distribución espacio-temporal en el conjunto de la península ibérica. Con el objetivo de estudiar los patrones de dispersión, movimientos y usos del hábitat de la población de cigüeñas en Navarra, durante el periodo 2012-2015 se anillaron 243 pollos en 9 colonias de cría del sur de Navarra. De todos ellos, el 16% de los individuos (n = 37) fue observado con posterioridad, tanto vivos y en buen estado (i.e., avistamientos) como muertos (i.e., recuperaciones, en su mayoría por electrocución). Todos los avistamientos, excepto tres, se realizaron en vertederos (n = 64), en donde el esfuerzo de muestreo fue considerablemente mayor. Dos avistamientos correspondieron a cigüeñas observadas en humedales, así como otro ejemplar que se observó dos años después en la colonia donde nació (i.e., reclutamiento). La distancia promedio de avistamiento en relación a la colonia de anillamiento fue de 48 km (distancia máxima, 410 km). La mayoría de avistamientos/recuperaciones se realizó durante la primavera y verano, con independencia de la edad. Todas las aves que se hallaron muertas (n = 7) fueron jóvenes encontrados en la proximidad de sus colonias de nacimiento.Palabras clave: Colonias, dispersión, electrocución, hábitat, vertederos. AbstractIn recent decades, the breeding population of White Stork Ciconia ciconia L., 1758 in Navarre has increased exponentially. The abundance of predictable food in landfills, providing one of the most used food resources for the species, seems to have influenced both demographically and spatiotemporal distribution in the whole Iberian Peninsula. In order to study dispersal patterns, movements and habitat use of the White Stork population in Navarre, during the period 2012-2015, we ringed 243 chicks in 9 breeding colonies in southern Navarre. Of these, 16% of the individuals (n = 37) were observed afterwards both alive and in good condition (i.e., sightings) and dead (i.e., recoveries), mostly by electrocution. All the sightings, except three, were made in landfills (n = 61), where the sampling effort was considerably higher. Two sightings corresponded to storks observed in wetlands, and another individual was observed two years after at the colony where it was born (i.e., recruitment). The average sighting distance in relation to the colony was 48 km (maximum distance, 410 km). Most sightings/recoveries were obtained during the spring and summer, regardless of age. All dead birds (n = 7) were fledglings found in the vicinity of the colonies where they were born.Key words: Colonies, dispersion, electrocution, habitat, landfills. LaburpenaAzken hamarkadetan Nafarroako amiamoko zuri Ciconia ciconia L., 1758 populazio ugaltzaileak gora egin du modu esponentzialean. Z...

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Effect of Rubbish Dumps on Breeding Success in the White Stork in Southern Spain

Cited by 115 publications

References 9 publications

Timing of arrival at breeding grounds determines spatial patterns of productivity within the population of white stork (Ciconia ciconia)

Timing of arrival at breeding grounds determines spatial patterns of productivity within the population of white stork (Ciconia ciconia)

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

Primeros datos sobre movimientos de cigüeñas blancas Ciconia ciconia L., 1758 anilladas como pollos en nido en Navarra: 2012-2015

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