Parasite spill-back from domestic hosts may induce an Allee effect in wildlife hosts
The exchange of native pathogens between wild and domesticated animals can lead to novel disease dynamics. A simple model reveals that the spill-back of native parasites from domestic to wild hosts may cause a demographic Allee effect. Because parasite spill-over and spill-back decouples the abundan...
| Main Authors: | , , |
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| Format: | Journal article |
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2012
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| _version_ | 1797076652073680896 |
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| author | Krkošek, M Ashander, J Lewis, M |
| author_facet | Krkošek, M Ashander, J Lewis, M |
| author_sort | Krkošek, M |
| collection | OXFORD |
| description | The exchange of native pathogens between wild and domesticated animals can lead to novel disease dynamics. A simple model reveals that the spill-back of native parasites from domestic to wild hosts may cause a demographic Allee effect. Because parasite spill-over and spill-back decouples the abundance of parasite infectious stages from the abundance of the wild host population, parasitism and mortality of the wild host population increases non-linearly as host abundance decreases. Analogous to the effects of satiation of generalist predators, parasite spill-back can produce an unstable equilibrium in the abundance of the host population above which the host population persists and below which it is at risk of extirpation. These effects are likely to be most pronounced in systems where the parasite has a high efficiency of transmission from domestic to wild host populations due to prolonged sympatry, disease vectors, or proximity of domesticated populations to wildlife migratory corridors. |
| first_indexed | 2024-03-07T00:06:46Z |
| format | Journal article |
| id | oxford-uuid:77cce4c0-b4d3-4f81-8327-ef6d54b2c353 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:06:46Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:77cce4c0-b4d3-4f81-8327-ef6d54b2c3532022-03-26T20:26:33ZParasite spill-back from domestic hosts may induce an Allee effect in wildlife hostsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:77cce4c0-b4d3-4f81-8327-ef6d54b2c353Mathematical Institute - ePrints2012Krkošek, MAshander, JLewis, MThe exchange of native pathogens between wild and domesticated animals can lead to novel disease dynamics. A simple model reveals that the spill-back of native parasites from domestic to wild hosts may cause a demographic Allee effect. Because parasite spill-over and spill-back decouples the abundance of parasite infectious stages from the abundance of the wild host population, parasitism and mortality of the wild host population increases non-linearly as host abundance decreases. Analogous to the effects of satiation of generalist predators, parasite spill-back can produce an unstable equilibrium in the abundance of the host population above which the host population persists and below which it is at risk of extirpation. These effects are likely to be most pronounced in systems where the parasite has a high efficiency of transmission from domestic to wild host populations due to prolonged sympatry, disease vectors, or proximity of domesticated populations to wildlife migratory corridors. |
| spellingShingle | Krkošek, M Ashander, J Lewis, M Parasite spill-back from domestic hosts may induce an Allee effect in wildlife hosts |
| title | Parasite spill-back from domestic hosts may induce an Allee effect in wildlife hosts |
| title_full | Parasite spill-back from domestic hosts may induce an Allee effect in wildlife hosts |
| title_fullStr | Parasite spill-back from domestic hosts may induce an Allee effect in wildlife hosts |
| title_full_unstemmed | Parasite spill-back from domestic hosts may induce an Allee effect in wildlife hosts |
| title_short | Parasite spill-back from domestic hosts may induce an Allee effect in wildlife hosts |
| title_sort | parasite spill back from domestic hosts may induce an allee effect in wildlife hosts |
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