Phenology and breeding parameters of Booted Eagle Hieraaetus pennatus in central Catalonia (Spain)

Authors: Josep BOSCH

Published: Volume 50(2), December 2003. Pages 181-189.

Language: Spanish

Original Title: Fenología y parÁmetros reproductivos del Aguililla Calzada Hieraaetus pennatus en Cataluña central (España)

Keywords: Booted eagle, breeding success, breeding density, phenology and Hieraaetus pennatus


Aims: Booted eagle Hieraaetus pennatus is a recent colonization species in Catalonia. There is an incipient population in this region since lastest 1980´s. Reproductive parameters was studied and compared with those obtained in the Tiétar valley (traditional breeding country in central Spain).

Location: Central Catalonia (north-east Spain).

Methods: Central Catalonia and Tiétar valley reproductive parameters were statistical compared by Student t test. Central Catalonia laying dates was correlated with mean rainfall and number of rainy days during pre-laying period and reproductive parameters (clutch size, hatchlings and mortality) with meteorological variables (mean rainfall and rainy days number) during all reproductive phases.

Results: For central Catalonia population no relationships were found between laying date and rainfall during pre-laying period. No differences were found for all studied reproduction parameters related with weather in several reproduction phases. A comparison of these results showed a higher productivity as Tiétar valley population (central Spain).

Conclusions: The higher breeding success of central Catalonia population than Tiétar valley population is probably due that Booted Eagle is density-dependent. Central Catalonia population is an incipient population that still has not reached regular breeding densities in occupied habitat, being lower than Tiétar valley breeding density. However, to a certain extent Booted Eagle breeding success is also probable conditioned for local climatic and topographic peculiarity.

Full Article:

Full Article

Enter your email and password to access the contents of the subscribers of the magazine. If you are not subscribed click here

We use own and third party cookies for the proper operation of the Website, carrying out analytical metrics, showing multimedia content and advertising, and interacting with social networks. More information in our Cookies Policy.
Accept Exit