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Article
Antoni Margalida, Auteur ; Luis Mariano Gonzalez, Auteur ; Roberto Sanchez, Auteur ; Javier Oria, Auteur ; Luis Prada, AuteurCapsule The sexes make significantly different contributions in the tasks of nest-building, incubation and food provisioning to chicks. Aims To determine the division of parental activities during breeding (nest-building, incubation, brooding, f[...]
Article
Luis Mariano Gonzalez, Auteur ; Javier Oria, Auteur ; Antoni Margalida, Auteur ; Roberto Sanchez, Auteur ; Luis Prada, Auteur ; Javier Caldera, Auteur ; Antonio Aranda, Auteur ; Jose Ignacio Molina, AuteurCapsule Dispersive capacity appears sufficient to establish natural re-occupation of the former range. Aims To document data on effective natal dispersal and age of maturity in the increasing, but fragmented, Spanish Imperial Eagle population. M[...]
Article
Roberto Sanchez, Auteur ; Anton Margalida, Auteur ; Luis Mariano Gonzalez, Auteur ; Javier Oria, AuteurThis study quantifies for the first time the biases associated with different methods (direct observations, pellets, remains, and pellets plus remains referred to as pooled data) used to assess the diet of the Spanish Imperial Eagle Aquila adalb[...]
Article
Antoni Margalida, Auteur ; Luis Mariano Gonzalez, Auteur ; Roberto Sanchez, Auteur ; Javier Oria, Auteur ; Luis Prada, Auteur ; Javier Caldera, Auteur ; Antonio Aranda, Auteur ; Jose Ignacio Molina, AuteurWe present data from a 17-year study of the population biology of a growing population of Spanish imperial eagles Aquila adalberti across most of its breeding range. The objective of this study was to analyse the effects of age, supplemental fee[...]
Article
Luis Mariano Gonzalez, Auteur ; Javier Oria, Auteur ; Roberto Sanchez, Auteur ; Antoni Margalida, Auteur ; Antonio Aranda, Auteur ; Luis Prada, Auteur ; Javier Caldera, Auteur ; Jose Ignacio Molina, AuteurThe distribution and abundance of Spanish Imperial Eagle Aquila adalberti populations between 1974 and 2004 were determined using information from national censuses. Its breeding area occupies the south-western quadrant of the Iberian Peninsula [...]
Article
Luis Mariano Gonzalez, Auteur ; Antoni Margalida, Auteur ; Roberto Sanchez, Auteur ; Javier Oria, AuteurWe studied the factors that led to brood reduction in 1192 nest/years of 143 territories of the Spanish imperial eagle during the period 1988-2003 and we carried out an innovative supplementary feeding programme in perches near nests in order to[...]
