La Tour du Valat

Article

Powerlines and the demise of large terrestrial bird populations in the eastern Karoo, South Africa

Mark D. Anderson, Auteur ; Steven E. Piper, Auteur

Dans Ostrich (78(2) June, 2007)

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Article

Modelling survival rates in the Cape Griffon Gyps coprotheres, with emphasis on the effects of supplementary feeding

Steven E. Piper, Auteur ; Andre F. Boshoff, Auteur ; H. Ann Scott, Auteur

Dans Bird Study (46(Suppl.) 1999)

Survival rates are crucial demographic parameters for modelling the population dynamics of the Cape Griffon vulture. Previous survival estimates based on ring recoveries are seriously flawed and have been heavily criticized. To provide better es[...]

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