Abstract

Management of heather moorland for driven Red Grouse (Lagopus lagopus scotica) shooting in the British uplands may benefit some raptors by reducing predation risk, especially when breeding, and by increasing food availability. We describe changes in abundance and breeding success of four raptor species and Common Raven (Corvus corax) during a 27-year study on a grouse moor in southwest Scotland in relation to whether or not the moor was managed by gamekeepers. Ground-nesting raptors, Hen Harrier (Circus cyaneus) and Merlin (Falco columbarius), increased during periods of grouse moor management and had a higher proportion of successful nesting attempts. Predation was the main apparent cause of breeding failure. In contrast, grouse moor management did not influence either abundance or breeding success of tree- and crag-nesting species, i.e., Peregrine (Falco peregrinus), Common Buzzard (Buteo buteo), and Raven. Buzzard sightings increased during the study, in line with their national recovery, whereas Peregrine and Raven showed little change in abundance. The results of our study highlight that management for Red Grouse can benefit both Hen Harrier and Merlin. However, on a UK scale these benefits to Hen Harriers, but not Merlin, are outweighed by their illegal killing, caused by fears that their consumption of Red Grouse can undermine the economics of grouse moor management.

Keywords

ground-nesting; predation; predator control; prey abundance; population dynamics

Published in

Avian Conservation and Ecology
2020, Volume: 15, number: 1, article number: 21
Publisher: RESILIENCE ALLIANCE

SLU Authors

• Roos, Staffan

  • SLU Swedish Species Information Centre, Swedish University of Agricultural Sciences
    
  • RSPB Centre for Conservation Science

UKÄ Subject classification

Ecology


Publication identifier

DOI: https://doi.org/10.5751/ACE-01568-150121

Permanent link to this page (URI)

https://res.slu.se/id/publ/107132