Evidence for fatal collisions and kleptoparasitism while plunge-diving in Gannets
Version of Record online: 26 MAY 2011
© 2011 The Authors. Ibis © 2011 British Ornithologists’ Union
Volume 153, Issue 3, pages 631–635, July 2011
How to Cite
MACHOVSKY CAPUSKA, G. E., DWYER, S. L., ALLEY, M. R., STOCKIN, K. A. and RAUBENHEIMER, D. (2011), Evidence for fatal collisions and kleptoparasitism while plunge-diving in Gannets. Ibis, 153: 631–635. doi: 10.1111/j.1474-919X.2011.01129.x
- Issue online: 14 JUN 2011
- Version of Record online: 26 MAY 2011
- Received 29 July 2010;revision accepted 18 April 2011.Associate Editor: Niall Burton.
- accidental collisions;
- Australasian Gannet;
- Cape Gannet;
Plunge-diving is a highly successful strategy for dealing with the challenges confronting birds feeding on pelagic prey. We tested for evidence of fatal injuries due to collision between conspecifics in plunge-diving Australasian Gannets Morus serrator and Cape Gannets Morus capensis, respectively, by performing post-mortem examinations of carcasses recovered from New Zealand waters and analysing video footage of Cape Gannet foraging events from South Africa. We found evidence of accidental collisions between Gannets and also observed a case of attempted kleptoparasitism, in which a diving Cape Gannet targeted a previously captured fish in the beak of a conspecific.