A long-term large-scale study of the breeding biology of the Spanish imperial eagle (Aquila adalberti)

2007 ◽  
Vol 148 (3) ◽  
pp. 309-322 ◽  
Author(s):  
Antoni Margalida ◽  
Luis Mariano González ◽  
Roberto Sánchez ◽  
Javier Oria ◽  
Luis Prada ◽  
...  
Oryx ◽  
2009 ◽  
Vol 43 (01) ◽  
pp. 113 ◽  
Author(s):  
Enric Ortega ◽  
Santi Mañosa ◽  
Antoni Margalida ◽  
Roberto Sánchez ◽  
Javier Oria ◽  
...  

1992 ◽  
Vol 59 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Luis M. González ◽  
Javier Bustamante ◽  
Fernando Hiraldo

The Auk ◽  
2003 ◽  
Vol 120 (1) ◽  
pp. 180-186 ◽  
Author(s):  
Miguel Ferrer ◽  
Isabelle Bisson

Abstract Over a period of 19 years, we studied 237 breeding attempts of Spanish Imperial Eagles (Aquila adalberti) in Doñana National Park (southwestern Spain), including 29 pairs with at least one immature member, to investigate age-related effects on population fecundity. Without considering effect of territory quality, adult pairs were significantly more productive than immature pairs. Highly significant differences in breeding performance among territories were independent of age-classes of birds occupying them. Low-quality territories were more frequently occupied by immature pairs, whereas high-quality territories were occupied mostly or exclusively by adult birds. Therefore, age and territory quality appear to be interrelated. We found no effect on average population fecundity due to breeding by immature pairs.


PLoS ONE ◽  
2011 ◽  
Vol 6 (3) ◽  
pp. e17196 ◽  
Author(s):  
Pascual López-López ◽  
Miguel Ferrer ◽  
Agustín Madero ◽  
Eva Casado ◽  
Michael McGrady

2008 ◽  
Vol 27 (11) ◽  
pp. 2985-2998 ◽  
Author(s):  
Solenne Chardonnet ◽  
Pierre Le Marechal ◽  
Hélène Cheval ◽  
Jean-Pierre Le Caer ◽  
Paulette Decottignies ◽  
...  

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