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Great bustards Otis tarda in Morocco: status in spring 1999 and evidence of a decline in recent decades

Published online by Cambridge University Press:  24 April 2009

Juan C. Alonso ,
Simon J. Lane ,
Robert Dawson  and
Youssef Idaghdour
Simon J. Lane
Affiliation:
Departamento de Ecologia Evolutiva, Museo Nacional de Ciencias Naturales, José Gutíerrez Abascal 2, 28006, Madrid, Spain and Department of Biological Sciences, University of Newcastle, University Drive, Callaghan, New South Wales 2308, Australia.
Robert Dawson
Affiliation:
The International Foundation for Conservation and Development of Wildlife, PO Box 116, Inezgane, Morocco.
Youssef Idaghdour
Affiliation:
The International Foundation for Conservation and Development of Wildlife, PO Box 116, Inezgane, Morocco.
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Abstract

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A spring (1999) census was conducted of great bustards Otis tarda in north-western Morocco, where a poorly known population of this species occurs. Sixty-four birds were seen in four distinct areas. Adult males were seen displaying at three of these areas, indicating that they are probably traditional lek sites. No adult males were observed in the fourth area and its status as a lek site is uncertain. Two further sites were visited but no birds were seen. Two lst-year males were seen with their mothers, demonstrating successful breeding in 1998. We argue that the small number of birds, a population sex ratio of 1:3.3 in favour of females, evidence for a range contraction, and probable isolation from other great bustard populations mean that this population is now extremely endangered and will decline to extinction unless conservation measures are implemented immediately.

Keywords

Conservationextinction riskgreat bustardMoroccoOtis tardapopulation trendsstatus
Type
Short Communication
Information
Oryx , Volume 34 , Issue 2 , April 2000 , pp. 141 - 146
Copyright
Copyright © Fauna and Flora International 2000

References

Alonso, J.A., Alonso, J.C., Martín, E. & Morales, M.B. (1995) The Great Bustard in the Reserve of Las Lagunas de Villafáfila. Inst. Estudios Zamoranos-CSIC, Zamora [in Spanish and English].Google Scholar
Alonso, J.C. & Alonso, J.A. (eds) (1990) Parametros Demograficos, Selection de Habitat y Distribution de la Avutarda (Otis tarda) en Tres Regiones Españolas. Coleccián Técnica, ICONA, Madrid [in Spanish with English summary].Google Scholar
Alonso, J.C., & Alonso, J.A. (1996) The great bustard Otis tarda in Spain: present status, recent trends and an evaluation of earlier censuses. Biological Conservation, 77, 79–86.CrossRefGoogle Scholar
Alonso, J.C., Alonso, J.A. & Mufloz-Pulido, R. (1994) Mitigation of bird collisions with transmission lines through groundwire marking. Biological Conservation, 67, 129–134.CrossRefGoogle Scholar
Alonso, J.C., Martin, E., Alonso, J.A. & Morales, M.B. (1998) Proximate and ultimate causes of natal dispersal in the great bustard Otis tarda. Behavioral Ecology, 9, 243–252.CrossRefGoogle Scholar
Alonso, J.C., Morales, M.B. & Alonso, J.A. (2000) Partial migration, and lek fidelity and nesting area fidelity in female great bustards Otis tarda. The Condor, 102, 127–136.CrossRefGoogle Scholar
Collar, N.J. (1985) The world status of the great bustard. Bustard Studies, 2, 1–20.Google Scholar
Collar, N.J., Crosby, M.J. & Stattersfield, A.J. (1994) Birds to Watch 2. Birdlife International, Cambridge.Google Scholar
Goriup, P. (ed.) (1983) The houbara bustard in Morocco. Report of the Al-Areen/ICBP March 1982 preliminary survey. ICBP, Cambridge.Google Scholar
Hellmich, J. (1999) The great bustard Otis tarda L. in Morocco 1998. Unpublished report to The International Foundation for Conservation and Development of Wildlife, Inezgane, Morocco.Google Scholar
del Hoyo, J., Elliot, A. & Sargatal, J. (eds) (1996) Handbook of the Birds of the World, vol. 3. Hoatzin to Auks. Lynx Edicions, Barcelona.Google Scholar
Johnsgard, P.A. (1991) Bustards, Hemipodes and Sandgrouse: Birds of Dry Places. Oxford University Press, Oxford.Google Scholar
Morales, M.B. (1999) Ecología reproductiva y movimientos estacionales en la avutarda (Otis tarda). PhD thesis, Complutense University, Madrid.Google Scholar
Morales, M.B., Alonso, J.C., Alonso, J.A. & Martín, E. (2000) Migration patterns in male great bustards (Otis tarda). Auk, in press.CrossRefGoogle Scholar
Pineau, J. & Giraud-Audine, M. (1977) Notes sur les oiseaux nicheurs de l'extreme nord-ouest du Maroc: reproduction et mouvements. Alauda, 45, 75–103 [in French].Google Scholar
Urban, E.K., Fry, C.H. & Keith, S. (eds) (1986) The Birds of Africa, vol. 2. Academic Press, London.Google Scholar