<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Aviles, J. M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Common cranes Grus grus and habitat management in holm oak dehesas of Spain</style></title><secondary-title><style face="normal" font="default" size="100%">BIODIVERSITY AND CONSERVATION</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">acorns</style></keyword><keyword><style  face="normal" font="default" size="100%">agricultural policies</style></keyword><keyword><style  face="normal" font="default" size="100%">holm oak dehesas</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2004///</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">13</style></volume><pages><style face="normal" font="default" size="100%">2015 - 2025</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Changes in agricultural policies have favored tree clearing and removal of shrubs to favor intensive farming in the holm oak Quercus ilex dehesas of Iberia. The effect of these changes for bird species wintering in this agricultural landscape has been rarely analyzed. Here the effects are studied of farming changes in traditional holm oak dehesas on population size, social structure and time budget of common cranes Grus grus in eight traditional wintering sites in Spain. The role of acorn availability, the principal winter food of the species, in relation to management is also assessed. The number of cranes in each wintering area was not related to degree of agricultural intensification, nor to the availability of acorns. However, crane flock size decreased, and the relative occurrence of isolated family groups increased in less intensively transformed wintering areas characterized by the predominance of fallow lands. The age composition of crane flocks varied with acorn availability since more juveniles were reported in areas with relatively lower acorn availability. Time budget was also related to acorn availability, since cranes spent relatively more time preening in those wintering areas with higher availability of acorns. Globally evidence suggests the need to maintain the fallow land (posios) to sustain the wintering populations of cranes in Iberia, since this agro-grazing system maintains most of the juvenile cranes using the western migratory route.</style></abstract><issue><style face="normal" font="default" size="100%">11</style></issue><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;pub-location: VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS&lt;br/&gt;publisher: KLUWER ACADEMIC PUBL</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Aviles, J. M.</style></author><author><style face="normal" font="default" size="100%">Parejo, D.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Farming practices and Roller Coracias garrulus conservation in south-west Spain</style></title><secondary-title><style face="normal" font="default" size="100%">BIRD CONSERVATION INTERNATIONAL</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Agricultural intensification</style></keyword><keyword><style  face="normal" font="default" size="100%">farming practices</style></keyword><keyword><style  face="normal" font="default" size="100%">Mediterranean</style></keyword><keyword><style  face="normal" font="default" size="100%">nest-boxes</style></keyword><keyword><style  face="normal" font="default" size="100%">reproduction</style></keyword><keyword><style  face="normal" font="default" size="100%">Roller Coracias garrulus</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2004///</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">14</style></volume><pages><style face="normal" font="default" size="100%">173 - 181</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">There are no previous studies supporting the link between the decline of Roller Coracias garrulus populations in the Palaearctic and agricultural intensification. We studied the effect of farming practices on Roller reproduction during 1988-1991 in south-west Spain. Nest-boxes were installed on power pylons that crossed six different man-made habitats representing the most characteristic habitats in the Mediterranean region: pasture fields with and without holm oak Quercus roffindifolia trees, cereal fields with and without holm oak trees, scrub fields and irrigated fields. Rollers nesting in nest-boxes erected in unwooded pasture field had the highest breeding success, suggesting that this is the most suitable nesting habitat of Rollers in the region. There were no significant effects of farming practices in habitat adjacent to nests on Roller laying date and clutch size. However, after controlling for laying date, current agricultural practices around nests affected chick mortality, with higher losses in irrigated fields. Breeding success and egg productivity were also affected by farming activities, with the lowest values in irrigated fields. Future conservation plans for Rollers should consider that nest-box provision might increase habitat suitability for Roller reproduction and that highly intensified agricultural practices might have deleterious effects on Roller populations.</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><notes><style face="normal" font="default" size="100%">APSAPSThe following values have no corresponding Zotero field:&lt;br/&gt;pub-location: 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA&lt;br/&gt;publisher: CAMBRIDGE UNIV PRESS</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Aviles, J. M.</style></author><author><style face="normal" font="default" size="100%">Medina, F. J.</style></author><author><style face="normal" font="default" size="100%">Sánchez, J. M.</style></author><author><style face="normal" font="default" size="100%">Parejo, D.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Does temporal variability of winter Common Cranes in the dehesas depend on farming practices?</style></title><secondary-title><style face="normal" font="default" size="100%">Waterbirds</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Agricultural intensification</style></keyword><keyword><style  face="normal" font="default" size="100%">Common Crane</style></keyword><keyword><style  face="normal" font="default" size="100%">Grus grus</style></keyword><keyword><style  face="normal" font="default" size="100%">holm oak dehesas</style></keyword><keyword><style  face="normal" font="default" size="100%">southwestern Spain</style></keyword><keyword><style  face="normal" font="default" size="100%">winter stability</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2002</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2002///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.bioone.org/doi/abs/10.1675/1524-4695(2002)025[0078:DTVOWC]2.0.CO;2</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">25</style></volume><pages><style face="normal" font="default" size="100%">86 - 92</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The inclusion of Spain and Portugal within the European Community has brought about a change in the traditional farming practices in the dehesas of Iberia to intensive cereal and to irrigated crops. Here we use seven-year counts of Common Cranes in 38 wintering sites to evaluate whether habitat structure modified by farm- ing practices in the Holm Oak (Quercus ilex) dehesas is an important determinant of variability in winter crane num- bers. We extracted, from a set of nine variables that express different levels of human management in the Holm Oak dehesas, two factors that accounted for the 66% of the variance. The first factor was related to livestock utiliza- tion of the dehesas, while the second one reflected Holm Oak presence. We ran a general linear model to analyze the influence of farming practices (PC1 and PC2), landscape heterogeneity and roost site stability on inter- and in- tra-season variability in numbers of winter cranes. Livestock presence, Holm Oak presence, landscape heterogeneity and roost type stability did not explain intra- and inter- season variability in crane numbers wintering in the Holm Oak dehesas of Spain.</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue></record></records></xml>