Competitive interactions among raptors in boreal forests

Oecologia
Harri HakkarainenSven Jungell

Abstract

We examined inter-specific interactions among goshawks ( Accipiter gentilis), common buzzards (Buteo buteo) and honey buzzards (Pernis apivorus) in western Finland in 1983-1996. Because goshawks are among the largest birds of prey species in boreal forests they may take over the nest of smaller and less-competitive forest-dwelling raptors when searching for suitable places for breeding. Accordingly, more than half of newly established goshawk territories were found on the territories previously occupied by the common buzzard and the honey buzzard. Otherwise, territory sharing between these species was rare. Fledgling production of honey buzzards was not associated with the presence of goshawks, probably owing to the almost 2 months later onset of breeding. This probably decreases competitive interactions between these two species. An intensive interference competition, instead, seemed to be evident between common buzzards and goshawks, because the fledgling production of common buzzards was decreased by 20% as a result of failures during incubation and nestling period in the vicinity (<1 km) of occupied goshawk nests. Similarly, territory occupancy of common buzzards till the next breeding season was significantly reduced in th...Continue Reading

Citations

Dec 8, 2010·Oecologia·María V Jiménez-FrancoJosé F Calvo
Apr 11, 2014·PloS One·María V Jiménez-FrancoJosé F Calvo
Feb 5, 2016·Oecologia·Heidi BjörklundToni Laaksonen
Aug 29, 2013·Biological Reviews of the Cambridge Philosophical Society·Rui LourençoErkki Korpimäki
Oct 1, 2015·PloS One·Heidi BjörklundToni Laaksonen
Apr 6, 2019·The Journal of Animal Ecology·Jennyffer CruzBenjamin Zuckerberg
Nov 8, 2018·Current Zoology·Beneharo RodríguezUNKNOWN Handling editor: Anders Møller
Sep 24, 2020·The Journal of Animal Ecology·Yannick SeyerJean-François Therrien

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