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Identifying key demographic parameters for the viability of a growing population of the endangered Egyptian Vulture Neophron percnopterus

  • HELENA TAULER (a1), JOAN REAL (a1), ANTONIO HERNÁNDEZ-MATÍAS (a1), PERE AYMERICH (a2), JORDI BAUCELLS (a3), CARLES MARTORELL (a3) and JOAN SANTANDREU (a4)...
Summary
Summary

The Egyptian Vulture Neophron percnopterus is a threatened species throughout its worldwide range. The Iberian Peninsula holds 50% of its global population, which has declined by 25% over the last 20 years. Despite this negative global trend, an increase in the number of individuals over the last 25 years has been observed in Catalonia, where it has colonised areas in which it was previously unknown. In this study, we describe the demographic evolution of an increasing population of Egyptian Vultures in central and eastern Catalonia and we apply population models and maximum likelihood procedures to investigate both the main demographic processes driving the observed trends and the viability of the population. The number of pairs in this region increased from one to 22 in the period 1988–2012. The best-supported models suggest that adult survival in this population may be higher than in other Iberian populations and that furthermore, there is a continuous influx of immigrants. Based on the most likely scenarios, Population Viability Analysis predicts that the population will continue to increase. Sensitivity analysis indicates that the adult survival rate has the greatest influence on population dynamics so conservation efforts will be more effective if concentrated on improving this rate.

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*Author for correspondence; email: htauler@ub.edu
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V. J. Bakker , D. F. Doak , G. W. Roemer , D. K. Garcelon , T. J. Coonan , S. A. Morrison , C. Lynch , K. Ralls and R Shaw . (2009) Incorporating ecological drivers and uncertainty into a demographic population viability analysis for the island fox. Ecol. Monogr. 79: 77108.

A. D. Barnosky , E. A. Hadly , J. Bascompte , E. L. Berlow , J. H. Brown , M. Fortelius , W. M. Getz , J. Harte , A. Hastings , P. A. Marquet , N. D. Martinez , A. Mooers , P. Roopnarine , G. Vermeij , J. W. Williams , R. Gillespie , J. Kitzes , C. Marshall , N. Matzke , D. P. Mindell , E. Revilla and A. B Smith . (2012) Approaching a state shift in Earth’s biosphere. Nature 486: 5258.

M. Carrete , J. A. Sánchez-Zapata , J. R. Benítez , M. Lobón and J. A Donázar . (2009) Large scale risk-assessment of wind-farms on population viability of a globally endangered long-lived raptor. Biol. Conserv. 142: 29542961.

G Caughley . (1994) Directions in conservation biology. J. Anim. Ecol. 63: 215244.

M. J. Conroy and J. C Senar . (2009) Integration of demographic analyses and decision modeling in support of management of invasive Monk Parakeets, an urban and agricultural pest. Pp. 491–510 in Modeling demographic processes in marked populations. US: Springer.

D. F. Doak , W. F. Morris , C. Pfister , B. E. Kendall and E. M Bruna . (2005) Correctly estimating how environmental stochasticity influences fitness and population growth. Am. Nat. 166: 1421.

J. A. Donázar , C. J. Palacios , L. Gangoso , O. Ceballos , M. J. González and F Hiraldo . (2002) Conservation status and limiting factors in the endangered population of Egyptian Vulture (Neophron percnopterus) in the Canary Islands. Biol. Conserv. 107: 8997.

J. A. Donázar , A. Cortés-Avizanda and M Carrete . (2010) Dietary shifts in two vultures after the demise of supplementary feeding stations: consequences of the EU sanitary legislation. Eur. J. Wildl. Res. 56: 613621.

C. Duhem , E. Vidal , J. Legrand and T Tatoni . (2003) Opportunistic feeding responses of the Yellow-legged Gull Larus michahellis to accessibility of refuse dumps: The gulls adjust their diet composition and diversity according to refuse dump accessibility. Bird Study 50: 6167.

L. Gangoso , R. Agudo , J. D. Anadón , M. de la Riva , A. S. Suleyman , R. Porter and J. A Donázar . (2012) Reinventing mutualism between humans and wild fauna: insights from vultures as ecosystem services providers. Conserv. Lett. 6: 172179.

C. García-Ripollès and P López-López . (2006) Population size and breeding performance of Egyptian Vultures (Neophron percnopterus) in Eastern Iberian Peninsula. J. Raptor Res. 40: 217221.

J. M. Grande , D. Serrano , G. Tavecchia , M. Carrete , O Ceballos ., R. Díaz-Delgado , J. L. Tella and J. A Donázar . (2008) Survival in a long-lived territorial migrant: effects of life-history traits and ecological conditions in wintering and breeding areas. Oikos 118: 580590.

M. Hernández and A Margalida . (2009) Poison-related mortality effects in the endangered Egyptian Vulture (Neophron percnopterus) population in Spain. Eur. J. Wildl. Res. 55: 415423.

A. Hernández-Matías , J. Real and R Pradel . (2011) Quick methods for evaluating survival of age-characterizable longlived territorial birds. J. Wildl. Manage. 75: 856866.

A. Hernández-Matías , J. Real , M. Moleón , L. Palma , J. A. Sánchez-Zapata , R. Pradel , M. Carrete , J. M. Gil-Sánchez , P. Beja , J. Balbontín , N. Vicent-Martin , A. Ravayrol , J. R. Benítez , B. Arroyo , C. Fernández , E. Ferreiro and J García . (2013) From local monitoring to a broad-scale viability assessment: a case study for the Bonelli's Eagle in western Europe. Ecol. Monogr. 83: 239261.

F. Liberatori and V Penteriani . (2001) A long-term analysis of the declining population of the Egyptian Vulture in the Italian peninsula: distribution, habitat preference, productivity and conservation implications. Biol. Conserv. 101: 381389.

M. Loreau , S. Naeem , P. Inchausti , J. Bengtsson , J. P. Grime , A. Hector , D. U. Hooper , M. A. Huston , D. Raffaelli , B. Schmid , D. Tilman and D. A Wardle . (2001) Biodiversity and ecosystem functioning: current knowledge and future challenges. Science 294: 804808.

A. Margalida and M. A Colomer (2012) Modelling the effects of sanitary policies on European vulture conservation. Sci. Rep. 2: 753.

A. Margalida , J. A. Donázar , M. Carrete and J. A Sánchez-Zapata . (2010) Sanitary versus environmental policies: fitting together two pieces of the puzzle of European vulture conservation. J. Appl. Ecol. 47: 931935.

A. Margalida , M. À. Colomer and D Oro . (2014) Man-induced activities modify demographic parameters in a long-lived species: effects of poisoning and health policies. Ecol. Appl. 24: 436444.

D. Oro and R Pradel . (2000) Determinants of local recruitment in a growing colony of Audouin's gull. J. Anim. Ecol. 69: 119132.

J. Real and S Mañosa . (1997) Demography and conservation of western European Bonelli’s eagle populations. Biol. Conserv. 79: 5966.

J. M. Reed and A. P Dobson . (1993) Behavioural constraints and conservation biology: Conspecific attraction and recruitment. Trends Ecol. Evol. 8: 253256.

B. E. Saether and O Bakker . (2000) Avian life history variation and contribution of demographic traits to the populations growth rate. Ecology 81: 642653.

M. Schaub , H. Jakober and W Stauber . (2013) Strong contribution of immigration to local population regulation: evidence from a migratory passerine. Ecology 94: 18281838.

C. J. Stubben and B. G Milligan . (2007) Estimating and analyzing demographic models using the popbio Package in R. J. Stat Software 22: 11.

W. C. Webb , J. M. Marzluff and J Hepinstall-Cymerman . (2011) Linking resource use with demography in a synanthropic population of common ravens. Biol. Conserv. 144: 22642273.

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Bird Conservation International
  • ISSN: 0959-2709
  • EISSN: 1474-0001
  • URL: /core/journals/bird-conservation-international
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