Integration of Demographic Analyses and Decision Modeling in Support of Management of Invasive Monk Parakeets, an Urban and Agricultural Pest

We investigated from 2003 to 2006 the population dynamics of Monk Parakeets (Myiopsitta monachus), an invasive, exotic, pest species inhabiting northeastern Spain. Our study focused on several colonies of parakeets in Barcelona. Starting in 2003, we trapped and marked birds at the main Barcelona colony in Ciutadella Park during 2 annual periods: winter (pre-nesting) and late summer (post-nesting), respectively. We marked 459 individuals, and subsequently reencountered marked birds at the colony via recapture, and additionally obtained resightings of parakeets throughout Barcelona (n = 381 recaptures and 570 resightings). We used a variation of the Robust Design in conjunction with reverse-time CR modelling to estimate survival and recruitment rates, and to determine the relative contribution of survival and recruitment to population growth rate. Due to high dispersal, apparent survival rates were low, so we used the combined recapture-resighting data to provide more realistic estimates of demographic survival. We then combined the projections with estimates of survival and recruitment elasticity from our statistical models in a decision model, in order to investigate alternative management scenarios for reducing damage from continued parakeet expansion. Given the logistical and social constraints under which managers operate, it appears that the most effective management strategy would be removal by trapping (in urban areas) or shooting (in rural areas) of birds during summer-winter period.

[1]  J. M. Winterbottom,et al.  BIRD POPULATION STUDIES: B. The Population of Twenty-one Acres near Fort Jameson , 1933 .

[2]  David R. Anderson,et al.  Population ecology of the mallard: VI. The effect of exploitation on survival , 1976 .

[3]  Cj Pennycuick.  Animal marking: recognition marking of animals in research , 1978 .

[4]  S. A. Temple,et al.  Exotic Birds: A Growing Problem with No Easy Solution , 1992 .

[5]  Stephen Pruett-Jones,et al.  NATURAL HISTORY OF THE MONK PARAKEET IN HYDE PARK, CHICAGO , 1995 .

[6]  Stephen Pruett-Jones,et al.  Exponential Population Growth of Monk Parakeets in the United States , 1996 .

[7]  Richard J. Barker,et al.  JOINT MODELING OF LIVE-RECAPTURE, TAG-RESIGHT, AND TAG-RECOVERY DATA , 1997 .

[8]  David R. Anderson,et al.  Model Selection and Inference: A Practical Information-Theoretic Approach , 2001 .

[9]  K. Burnham,et al.  Program MARK: survival estimation from populations of marked animals , 1999 .

[10]  D. Simberloff,et al.  Eradication revisited: dealing with exotic species. , 2000, Trends in ecology & evolution.

[11]  David R. Anderson,et al.  Model selection and inference : a practical information-theoretic approach , 2000 .

[12]  D. Pimentel,et al.  Environmental and Economic Costs of Nonindigenous Species in the United States , 2000 .

[13]  David M. Lodge,et al.  Predicting invaders: Response from Kolar and Lodge , 2001 .

[14]  C. Kolar,et al.  Progress in invasion biology: predicting invaders. , 2001, Trends in ecology & evolution.

[15]  M. Conroy,et al.  Analysis and Management of Animal Populations , 2002 .

[16]  Juan Carlos Senar,et al.  Population size of the Monk Parakeet Myiopsitta monachus in Catalonia , 2003 .

[17]  Andrew P. Hendry,et al.  Contemporary evolution meets conservation biology , 2003 .

[18]  Kate E. Jones,et al.  Influences on the transport and establishment of exotic bird species: an analysis of the parrots (Psittaciformes) of the world , 2004 .

[19]  Christopher J. Butler.  Feral Parrots in the Continental United States and United Kingdom: Past, Present, and Future , 2005 .

[20]  Raimundo Real,et al.  Assessing the potential range expansion of the exotic monk parakeet in Spain , 2006 .

[21]  Hamdy A. Taha,et al.  Operations research: an introduction / Hamdy A. Taha , 1982 .

[22]  David Pimentel,et al.  Environmental and Economic Costs of Biofuels , 2010 .

[23]  A Rosenwax,et al.  Avian medicine and surgery in practice , 2011 .