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    STUDIA BIOLOGIA - Issue no. 1 / 2004  
         
  Article:   BREEDING BIOLOGY OF THE GOLDEN EAGLE (AQUILA CHRYSAETOS CHRYSAETOS L. 1758) IN THE GORGE OF TURDA NATURE RESERVE.

Authors:  ALIN DAVID, IOAN COROIU.
 
       
         
  Abstract:  The paper presents the results of the research regarding the biology and ethology of the Golden Eagle (Aquila chrysaetos chrysaetos) during the breeding season. The Golden Eagle is an extremely rare species in Romania as well as in its whole spreading area, due to the loss of its specific habitat and excessive hunting. Protecting this species requires, apart from the legislative measures, the knowledge of its biological features. The present study took place between 2000 and 2003 in the Gorge of Turda Nature Reserve and its main objective was to analyse breeding biology of this species. The observations were carried out in 140 days (70 days in the year 2000, 50 days in 2001 and 10 days in 2002 and in 2003). In 2000, the behaviour of the adults as well as that of the hatchlings were monitored during the whole breeding season. In 2001, great attention was paid to the brooding biology and in 2002 and 2003, the main objective of the investigations was the breeding success. In each of these 4 years, two eggs were laid at 3-day intervals. Both partners take part in the brooding, but in different proportions, the main role belonging to the female (67.53% in 2000 and 70.7% in 2001). The incubation lasted for 42 days. In 2000, in the fledging period, the male provided food for the family in the proportion of 85.24%. As a result of the competition between the hatchlings, in three of the four seasons the younger hatchling died about one month after hatching. The duration of fledging period was 65 days in 2000 and 64 days in 2001. Totally, the breeding success was of 62.5%. Knowledge of the ecological requirements and of the reproductive features of the Golden Eagle is a very important step for working out the long-term conservation strategies that are so important for the survival of this species.  
         
     
         
         
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