John M. Pearce, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 42
Filter Total Items: 29
No results found.
Filter Total Items: 80
Transmission and reassortment of avian influenza viruses at the Asian-North American interface Transmission and reassortment of avian influenza viruses at the Asian-North American interface
Twenty avian influenza viruses were isolated from seven wild migratory bird species sampled at St. Lawrence Island, Alaska. We tested predictions based on previous phylogenetic analyses of avian influenza viruses that support spatially dependent trans-hemispheric gene flow and frequent interspecies transmission at a location situated at the Asian–North American interface. Through the...
Authors
Andrew M. Ramey, John M. Pearce, Craig R. Ely, Lisa M. Sheffield Guy, David B. Irons, Dirk V. Derksen, S. Ip
Limited evidence of trans-hemispheric movement of avian influenza viruses among contemporary North American shorebird isolates Limited evidence of trans-hemispheric movement of avian influenza viruses among contemporary North American shorebird isolates
Migratory routes of gulls, terns, and shorebirds (Charadriiformes) are known to cross hemispheric boundaries and intersect with outbreak areas of highly pathogenic avian influenza (HPAI). Prior assessments of low pathogenic avian influenza (LPAI) among species of this taxonomic order found some evidence for trans-hemispheric movement of virus genes. To specifically clarify the role of...
Authors
John M. Pearce, Andrew M. Ramey, S. Ip, Robert E. Gill
Migratory patterns and population structure among breeding and wintering red-breasted mergansers (Mergus serrator) and common mergansers (M. merganser) Migratory patterns and population structure among breeding and wintering red-breasted mergansers (Mergus serrator) and common mergansers (M. merganser)
Philopatry has long been assumed to structure populations of waterfowl and other species of birds genetically, especially via maternally transmitted mitochondrial DNA (mtDNA), yet other migratory behaviors and nesting ecology (use of ground vs. cavity sites) may also contribute to population genetic structure. We investigated the effects of migration and nesting ecology on the population...
Authors
John M. Pearce, K. G. McCracken, Thomas K. Christensen, Y.N. Zhuravlev
Mechanisms of population heterogeneity among molting common mergansers on Kodiak Island, Alaska: Implications for genetic assessments of migratory connectivity Mechanisms of population heterogeneity among molting common mergansers on Kodiak Island, Alaska: Implications for genetic assessments of migratory connectivity
Quantifying population genetic heterogeneity within nonbreeding aggregations can inform our understanding of patterns of site fidelity, migratory connectivity, and gene flow between breeding and nonbreeding areas. However, characterizing mechanisms that contribute to heterogeneity, such as migration and dispersal, is required before site fidelity and migratory connectivity can be...
Authors
John M. Pearce, Denny Zwiefelhofer, Nate Maryanski
Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America
Although continental populations of avian influenza viruses are genetically distinct, transcontinental reassortment in low pathogenic avian influenza (LPAI) viruses has been detected in migratory birds. Thus, genomic analyses of LPAI viruses could serve as an approach to prioritize species and regions targeted by North American surveillance activities for foreign origin highly pathogenic...
Authors
John M. Pearce, Andrew M. Ramey, Paul L. Flint, Anson V. Koehler, Joseph P. Fleskes, J. Christian Franson, Jeffrey S. Hall, Dirk V. Derksen, S. Ip
Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California
The global redistribution of pathogens, such as highly pathogenic avian influenza, has renewed interest in the connectivity of continental populations of birds. Populations of the Northern Pintail (Anas acuta) wintering in Japan and California are considered separate from a management perspective. We used data from band recoveries and population genetics to assess the degree of...
Authors
Paul L. Flint, Kiyoaki Ozaki, John M. Pearce, Brian Guzzetti, Hiroyoshi Higuchi, Joseph P. Fleskes, Tetsuo Shimada, Dirk V. Derksen
Science and Products
Filter Total Items: 42
Filter Total Items: 29
No results found.
Filter Total Items: 80
Transmission and reassortment of avian influenza viruses at the Asian-North American interface Transmission and reassortment of avian influenza viruses at the Asian-North American interface
Twenty avian influenza viruses were isolated from seven wild migratory bird species sampled at St. Lawrence Island, Alaska. We tested predictions based on previous phylogenetic analyses of avian influenza viruses that support spatially dependent trans-hemispheric gene flow and frequent interspecies transmission at a location situated at the Asian–North American interface. Through the...
Authors
Andrew M. Ramey, John M. Pearce, Craig R. Ely, Lisa M. Sheffield Guy, David B. Irons, Dirk V. Derksen, S. Ip
Limited evidence of trans-hemispheric movement of avian influenza viruses among contemporary North American shorebird isolates Limited evidence of trans-hemispheric movement of avian influenza viruses among contemporary North American shorebird isolates
Migratory routes of gulls, terns, and shorebirds (Charadriiformes) are known to cross hemispheric boundaries and intersect with outbreak areas of highly pathogenic avian influenza (HPAI). Prior assessments of low pathogenic avian influenza (LPAI) among species of this taxonomic order found some evidence for trans-hemispheric movement of virus genes. To specifically clarify the role of...
Authors
John M. Pearce, Andrew M. Ramey, S. Ip, Robert E. Gill
Migratory patterns and population structure among breeding and wintering red-breasted mergansers (Mergus serrator) and common mergansers (M. merganser) Migratory patterns and population structure among breeding and wintering red-breasted mergansers (Mergus serrator) and common mergansers (M. merganser)
Philopatry has long been assumed to structure populations of waterfowl and other species of birds genetically, especially via maternally transmitted mitochondrial DNA (mtDNA), yet other migratory behaviors and nesting ecology (use of ground vs. cavity sites) may also contribute to population genetic structure. We investigated the effects of migration and nesting ecology on the population...
Authors
John M. Pearce, K. G. McCracken, Thomas K. Christensen, Y.N. Zhuravlev
Mechanisms of population heterogeneity among molting common mergansers on Kodiak Island, Alaska: Implications for genetic assessments of migratory connectivity Mechanisms of population heterogeneity among molting common mergansers on Kodiak Island, Alaska: Implications for genetic assessments of migratory connectivity
Quantifying population genetic heterogeneity within nonbreeding aggregations can inform our understanding of patterns of site fidelity, migratory connectivity, and gene flow between breeding and nonbreeding areas. However, characterizing mechanisms that contribute to heterogeneity, such as migration and dispersal, is required before site fidelity and migratory connectivity can be...
Authors
John M. Pearce, Denny Zwiefelhofer, Nate Maryanski
Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America
Although continental populations of avian influenza viruses are genetically distinct, transcontinental reassortment in low pathogenic avian influenza (LPAI) viruses has been detected in migratory birds. Thus, genomic analyses of LPAI viruses could serve as an approach to prioritize species and regions targeted by North American surveillance activities for foreign origin highly pathogenic...
Authors
John M. Pearce, Andrew M. Ramey, Paul L. Flint, Anson V. Koehler, Joseph P. Fleskes, J. Christian Franson, Jeffrey S. Hall, Dirk V. Derksen, S. Ip
Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California
The global redistribution of pathogens, such as highly pathogenic avian influenza, has renewed interest in the connectivity of continental populations of birds. Populations of the Northern Pintail (Anas acuta) wintering in Japan and California are considered separate from a management perspective. We used data from band recoveries and population genetics to assess the degree of...
Authors
Paul L. Flint, Kiyoaki Ozaki, John M. Pearce, Brian Guzzetti, Hiroyoshi Higuchi, Joseph P. Fleskes, Tetsuo Shimada, Dirk V. Derksen