Abstract
Conventional applications of metapopulation theory have suggested that increasing migration between patches is usually good for conservation. A recent analysis by Hess has pointed out a possible exception to this: when infectious disease is present, migration may promote disease spread and therefore increase local extinction. We extend Hess's model to discuss this problem: when infections have spilled over from more abundant alternative hosts. This is often the case for species of conservation concern, and we find that Hess's conclusions must be substantially modified. We use deterministic analytic and stochastic numerical approaches to show that movement between patches will rarely have a negative impact, even when the probability of external infection is low.
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Selected References
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- Castle M. D., Christensen B. M. Hematozoa of wild turkeys from the midwestern United States: translocation of wild turkeys and its potential role in the introduction of Plasmodium kempi. J Wildl Dis. 1990 Apr;26(2):180–185. doi: 10.7589/0090-3558-26.2.180. [DOI] [PubMed] [Google Scholar]
- Flamand J. R., Greth A., Haagsma J., Griffin F. An outbreak of tuberculosis in a captive herd of Arabian oryx (Oryx leucoryx): diagnosis and monitoring. Vet Rec. 1994 Jan 29;134(5):115–118. doi: 10.1136/vr.134.5.115. [DOI] [PubMed] [Google Scholar]
- Gascoyne S. C., King A. A., Laurenson M. K., Borner M., Schildger B., Barrat J. Aspects of rabies infection and control in the conservation of the African wild dog (Lycaon pictus) in the Serengeti region, Tanzania. Onderstepoort J Vet Res. 1993 Dec;60(4):415–420. [PubMed] [Google Scholar]
- Kat P. W., Alexander K. A., Smith J. S., Munson L. Rabies and African wild dogs in Kenya. Proc Biol Sci. 1995 Nov 22;262(1364):229–233. doi: 10.1098/rspb.1995.0200. [DOI] [PubMed] [Google Scholar]
- Landolt M., Kocan R. M. Transmission of avian pox from starlings to Rothchild's mynahs. J Wildl Dis. 1976 Jul;12(3):353–356. doi: 10.7589/0090-3558-12.3.353. [DOI] [PubMed] [Google Scholar]
- Montali R. J., Scanga C. A., Pernikoff D., Wessner D. R., Ward R., Holmes K. V. A common-source outbreak of callitrichid hepatitis in captive tamarins and marmosets. J Infect Dis. 1993 Apr;167(4):946–950. doi: 10.1093/infdis/167.4.946. [DOI] [PubMed] [Google Scholar]
- O'Brien S. J., Roelke M. E., Marker L., Newman A., Winkler C. A., Meltzer D., Colly L., Evermann J. F., Bush M., Wildt D. E. Genetic basis for species vulnerability in the cheetah. Science. 1985 Mar 22;227(4693):1428–1434. doi: 10.1126/science.2983425. [DOI] [PubMed] [Google Scholar]
- Roelke-Parker M. E., Munson L., Packer C., Kock R., Cleaveland S., Carpenter M., O'Brien S. J., Pospischil A., Hofmann-Lehmann R., Lutz H. A canine distemper virus epidemic in Serengeti lions (Panthera leo). Nature. 1996 Feb 1;379(6564):441–445. doi: 10.1038/379441a0. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sillero-Zubiri C., King A. A., Macdonald D. W. Rabies and mortality in Ethiopian wolves (Canis simensis). J Wildl Dis. 1996 Jan;32(1):80–86. doi: 10.7589/0090-3558-32.1.80. [DOI] [PubMed] [Google Scholar]
- Woodroffe R, Ginsberg JR. Edge effects and the extinction of populations inside protected areas . Science. 1998 Jun 26;280(5372):2126–2128. doi: 10.1126/science.280.5372.2126. [DOI] [PubMed] [Google Scholar]