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Skip to Search Results- 7Lewis, Mark A.
- 4Peacock, Stephanie J.
- 3Krkosek, Martin
- 3Krkošek, Martin
- 2Boutin, S.
- 2Derocher, A.E.
- 24Biological Sciences, Department of
- 21Biological Sciences, Department of/Journal Articles (Biological Sciences)
- 9Graduate and Postdoctoral Studies (GPS), Faculty of
- 9Graduate and Postdoctoral Studies (GPS), Faculty of /Theses and Dissertations
- 5Mathematical and Statistical Sciences, Department of
- 5Mathematical and Statistical Sciences, Department of/Research Publications (Mathematical and Statistical Sciences)
- 2Boyce, Mark (Biological Sciences)
- 1Boutin, Stan (Biological Sciences)
- 1Boyce, Mark (Biological Science)
- 1Leighton, Lindsey R. (Earth and Atmospheric Sciences)
- 1Mark Lewis (Biological Sciences and Mathematical and Statistical Sciences)
- 1Martin Krkošek (Ecology and Evolutionary Biology, University of Toronto)
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A microsatellite polymorphism in the gamma interferon gene is associated with resistance to gastrointestinal nematodes in a naturally-parasitized population of Soay sheep
Download2001
Pemberton, J. M., Coltman, D. W., Pilkington, J. G., Wilson, K., Stear, M. J.
Abstract: Free-living Soay sheep (Ovis aries) on the island of Hirta, St Kilda, Scotland, are naturally parasitized bq gastrointestinal nematodes, predominantly Teladorsagia circumcincta. In this paper we show that reduced faecal egg counts (FEC) are associated with an allele at a microsatellite...
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Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice
Download2012-01-01
Ashander, Jaime, Lewis, Mark A., Krkošek, Martin
Exchange of diseases between domesticated and wild animals is a rising concern for conservation. In the ocean, many species display life histories that separate juveniles from adults. For pink salmon (Oncorhynchus gorbuscha) and parasitic sea lice (Lepeophtheirus salmonis), infection of juvenile...
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Brown Bear (Ursus arctos) Predation of Broad Whitefish (Coregonus nasus) in the Mackenzie Delta Region, Northwest Territories
Download2009
On 2 October 2007, we observed evidence of at least one brown bear (Ursus arctos) predating and caching broad whitefish (Coregonus nasus) at Pete’s Creek, a tributary of the Mackenzie River, Northwest Territories. While predation on whitefish by brown bears has been reported as traditional...
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2014-01-01
Peacock, Stephanie J., Connors, Brendan M., Krkošek, Martin, Irvine, James R., Lewis, Mark A.
The impact of parasites on hosts is invariably negative when considered in isolation, but may be complex and unexpected in nature. For example, if parasites make hosts less desirable to predators then gains from reduced predation may offset direct costs of being parasitized. We explore these...
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2010
Longrich, N. R., Currie, P. J., Erickson, G. M., Horner, J. R.
Background: Tyrannosaurus rex was one of the largest terrestrial carnivores of all time, and consequently its ecology and diet have been the focus of much discussion. However, there is little direct evidence of diet or feeding habits in this species. Methodology/Principal Findings: Examination...
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2013-01-01
Krkosek, Martin, Orr, Craig, Peacock, Stephanie J., Proboszcz, Stan, Lewis, Mark A.
The resilience of coastal social-ecological systems may depend on adaptive responses to aquaculture disease outbreaks that can threaten wild and farm fish. A nine-year study of parasitic sea lice (Lepeophtheirus salmonis) and pink salmon (Oncorhynchus gorbuscha) from Pacific Canada indicates that...
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2013-01-01
Lewis, Mark A., Proboscsz, S., Orr, C., Krkošek, M., Peacock, S.J.
The resilience of coastal social–ecological systems may depend on adaptive responses to aquaculture disease outbreaks that can threaten wild and farm fish. A nine-year study of parasitic sea lice (Lepeophtheirus salmonis) and pink salmon (Oncorhynchus gorbuscha) from Pacific Canada indicates that...
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Fall 2010
Predation by cougars (Puma concolor) variously can structure ecosystems and preserve biodiversity, engender conflict where livestock and pets are killed, and even drive prey populations to extinction. Effective management requires a firm grasp of the ecological drivers of predation, but these...
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Fall 2012
In western North America cougar populations are increasing and expanding eastward. Simultaneously, growing human populations are creating new challenges for managers charged with maintaining the viability of cougar populations and their ungulate prey. Information on how cougars respond to...
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2012-02-24
Ecological systems are complex. All too often, complex models are fit to ecological data without consideration of whether parameters are estimable. I present a recent example for a parasite transmission model tracking the diffusion of sea lice from salmon farms in coastal British Columbia, fit...