Present address: Laboratório de Ecologia, Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia, Campus Jequié, Av. José Moreira Sobrinho s/n, CEP 45206-510, Jequié, BA, Brazil.
Modelling post-release survival of reintroduced Red-billed Curassows Crax blumenbachii
Article first published online: 14 JUN 2011
© 2011 The Authors. Ibis © 2011 British Ornithologists’ Union
Volume 153, Issue 3, pages 562–572, July 2011
How to Cite
BERNARDO, C. S. S., LLOYD, H., BAYLY, N. and GALETTI, M. (2011), Modelling post-release survival of reintroduced Red-billed Curassows Crax blumenbachii. Ibis, 153: 562–572. doi: 10.1111/j.1474-919X.2011.01142.x
- Issue published online: 14 JUN 2011
- Article first published online: 14 JUN 2011
- Received 10 January 2011; revision accepted 3 May 2011. Associate Editor: Stuart Marsden.
- Atlantic rainforest;
- mark software;
- survival probability
Modelling post-release survival probabilities of reintroduced birds can help inform ‘soft-release’ strategies for avian reintroductions that use captive-bred individuals. We used post-release radiotelemetry data to estimate the survival probabilities of reintroduced captive-bred Red-billed Curassow Crax blumenbachii, a globally threatened Cracid endemic to the Brazilian Atlantic Rainforest. Between August 2006 and December 2008, 46 radiotagged Curassows from the Crax Brazil breeding centre were reintroduced to the Guapiaçu Ecological Reserve (REGUA), Rio de Janeiro state, Brazil, in seven different cohorts. Reintroduced birds were most vulnerable during the first 12 months post-release from natural predation, domestic dogs and hunting. Annual post-release survival probability was high (75%) compared with published estimates for other Galliform species. However, when considering survival in all birds transported to REGUA (some birds died before release or were retained in captivity) and not only post-release survival, ϕ in this study was closer to estimates for other species (60%). The duration of the pre-release acclimatization period within the soft-release enclosure and the size of the released cohorts both positively influenced post-release survival of reintroduced Curassows. Our results are relevant to future Cracid reintroductions and highlight the importance of utilizing post-release monitoring data for evidence-based improvements to soft-release strategies that can significantly enhance the post-release survival of captive-bred birds.