期刊
BIRD STUDY
卷 48, 期 -, 页码 221-228出版社
BRITISH TRUST ORNITHOLOGY
DOI: 10.1080/00063650109461221
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The Spanish Bonelli's Eagle populations have decreased markedly because of high mortality. We recorded 424 cases of dead eagles between 1990 and 1998 in Spain which after cross-comparison corresponded to 377 individuals. Electrocution (55% of deaths), followed by direct persecution (26%) were the main causes of death. No differences in the cause of death were found between sexes. Non-adult eagles mostly died of electrocution whereas adults were mainly the victims of persecution. A log-linear model showed that these differences were associated with a difference in tire spatial distribution of age classes, rather than to age or experience per se. Persecution ions the main cause of death in breeding areas and electrocution in non-breeding auras. There were differences between regions: electrocution ions the main cause in Catalonia and Central Spain (50% and 86% respectively) whereas direct persecution was the main cause in Levant and Northern Spain (52% and 43% respectively). We recommend that steps are taken in order to reduce eagle mortality, taking into account the differences between regions and areas.
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