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John M. Pearce, Ph.D. (Former Employee)

Science and Products

Filter Total Items: 42
A Yellow-billed Loon swimming in a small lake

Science Informing Endangered Species Act Decisions and Recovery Planning

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing Endangered Species Act decisions and...
By
Species Management Research Program, Alaska Science Center
Science Informing Endangered Species Act Decisions and Recovery Planning

Science Informing Endangered Species Act Decisions and Recovery Planning

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing Endangered Species Act decisions and...
Learn More
Two Black Brant in a wetland near the Colville River Delta

Science Informing the Status and Trends of Migratory Birds

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making on the status and trends...
By
Ecosystems Mission Area, Species Management Research Program, Alaska Science Center
Science Informing the Status and Trends of Migratory Birds

Science Informing the Status and Trends of Migratory Birds

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making on the status and trends...
Learn More
A satellite tagged Pacific walrus on a piece of sea ice

Science for Oil and Gas Leasing-related Decisions

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making for oil and gas leasing...
By
Species Management Research Program, Alaska Science Center
Science for Oil and Gas Leasing-related Decisions

Science for Oil and Gas Leasing-related Decisions

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making for oil and gas leasing...
Learn More
A satellite tagged Pacific walrus on a piece of sea ice

Marine Ecosystems

The USGS conducts research on marine wildlife, habitats, and processes to provide science to inform our partners as they make decisions relative to species status, resource use, and human activities.
By
Ecosystems Mission Area, Land Management Research Program, Species Management Research Program, Alaska Science Center
Marine Ecosystems

Marine Ecosystems

The USGS conducts research on marine wildlife, habitats, and processes to provide science to inform our partners as they make decisions relative to species status, resource use, and human activities.
Learn More
Snow Goose near the Colville River, northern Alaska

Broad-scale Research Conducted Across the 1002 Area and the NPR-A of Alaska

Selected Bibliography of Broad-scale Research Involving USGS and Conducted Across the 1002 Area and the NPR-A of Alaska Compiled as of 12/17/2018
By
Land Management Research Program, Species Management Research Program, Alaska Science Center
Broad-scale Research Conducted Across the 1002 Area and the NPR-A of Alaska

Broad-scale Research Conducted Across the 1002 Area and the NPR-A of Alaska

Selected Bibliography of Broad-scale Research Involving USGS and Conducted Across the 1002 Area and the NPR-A of Alaska Compiled as of 12/17/2018
Learn More
A stream flowing from a small lake on the Arctic Coastal Plain

Research Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area)

Selected Bibliography of Research Involving USGS and Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area) Compiled as of 12/17/2018
By
Species Management Research Program, Alaska Science Center
Research Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area)

Research Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area)

Selected Bibliography of Research Involving USGS and Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area) Compiled as of 12/17/2018
Learn More
No Result Found
Filter Total Items: 29
No results found.
Filter Total Items: 80

Behavioral vs. molecular sources of conflict between nuclear and mitochondrial DNA: The role of male-biased dispersal in a Holarctic sea duck Behavioral vs. molecular sources of conflict between nuclear and mitochondrial DNA: The role of male-biased dispersal in a Holarctic sea duck

Genetic studies of waterfowl (Anatidae) have observed the full spectrum of mitochondrial (mt) DNA population divergence, from apparent panmixia to deep, reciprocally monophyletic lineages. Yet, these studies often found weak or no nuclear (nu) DNA structure, which was often attributed to male-biased gene flow, a common behaviour within this family. An alternative explanation for this...
Authors
Jeffrey Peters, Kimberly Bolender, John Pearce
By
Ecosystems Mission Area, Alaska Science Center

Glass wool filters for concentrating waterborne viruses and agricultural zoonotic pathogens Glass wool filters for concentrating waterborne viruses and agricultural zoonotic pathogens

The key first step in evaluating pathogen levels in suspected contaminated water is concentration. Concentration methods tend to be specific for a particular pathogen group, for example US Environmental Protection Agency Method 1623 for Giardia and Cryptosporidium1, which means multiple methods are required if the sampling program is targeting more than one pathogen group. Another...
Authors
Hana Millen, Jordan Gonnering, Ryan Berg, Susan K. Spencer, William Jokela, John Pearce, Jackson S. Borchardt, Mark A. Borchardt
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds

Surveillance has revealed low prevalence of avian influenza viruses (AIV) in shorebirds except Ruddy Turnstones (Arenaria interpres) on the North American Atlantic coast. Similarly, of five species of shorebirds surveyed in Alaska in 2010, Ruddy Turnstones had the highest AIV antibody prevalence; prevalence of AIV RNA was low or zero.
Authors
John Pearce, Daniel Ruthrauff, Jeffrey Hall
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center

SYBR green-based real-time reverse transcription-PCR for typing and subtyping of all hemagglutinin and neuraminidase genes of avian influenza viruses and comparison to standard serological subtyping tests SYBR green-based real-time reverse transcription-PCR for typing and subtyping of all hemagglutinin and neuraminidase genes of avian influenza viruses and comparison to standard serological subtyping tests

Continuing outbreaks of H5N1 highly pathogenic (HP) avian influenza virus (AIV) infections of wild birds and poultry worldwide emphasize the need for global surveillance of wild birds. To support the future surveillance activities, we developed a SYBR green-based, real-time reverse transcriptase PCR (rRT-PCR) for detecting nucleoprotein (NP) genes and subtyping 16 hemagglutinin (HA) and...
Authors
K. Tsukamoto, P.C. Javier, M. Shishido, D. Noguchi, John Pearce, H.-M. Kang, O.M. Jeong, Y.-J. Lee, K. Nakanishi, T. Ashizawa
By
Ecosystems Mission Area, Alaska Science Center

Habitat use and movement patterns of Northern Pintails during spring in northern Japan: the importance of agricultural lands Habitat use and movement patterns of Northern Pintails during spring in northern Japan: the importance of agricultural lands

From 2006 to 2009, we marked 198 Northern Pintails (Anas acuta) with satellite transmitters on their wintering areas in Japan to study their migration routes and habitat use in spring staging areas. We hypothesized that the distribution of pintails during spring staging was influenced by patterns of land use and expected that the most frequently used areas would have more agricultural...
Authors
Noriyuki Yamaguchi, Jerry Hupp, Paul Flint, John Pearce, Yusuke Shigeta, Tetsuo Shimada, Emiko Hiraoka, Hiroyoshi Higuchi
By
Ecosystems Mission Area, Alaska Science Center

Interspecies transmission and limited persistence of low pathogenic avian influenza genomes among Alaska dabbling ducks Interspecies transmission and limited persistence of low pathogenic avian influenza genomes among Alaska dabbling ducks

The reassortment and geographic distribution of low pathogenic avian influenza (LPAI) virus genes are well documented, but little is known about the persistence of intact LPAI genomes among species and locations. To examine persistence of entire LPAI genome constellations in Alaska, we calculated the genetic identities among 161 full-genome LPAI viruses isolated across 4 years from five...
Authors
Andrew Reeves, John Pearce, Andrew Ramey, Brandt Meixell, Jonathan Runstadler
By
Ecosystems Mission Area, Alaska Science Center

Evidence for limited exchange of avian influenza viruses between seaducks and dabbling ducks at Alaska Peninsula coastal lagoons Evidence for limited exchange of avian influenza viruses between seaducks and dabbling ducks at Alaska Peninsula coastal lagoons

Avian influenza virus (AIV) prevalence and sequence data were analyzed for Steller's eiders (Polysticta stelleri) to assess the role of this species in transporting virus genes between continents and maintaining a regional viral reservoir with sympatric northern pintails (Anas acuta). AIV prevalence was 0.2% at Izembek Lagoon and 3.9% at Nelson Lagoon for Steller's eiders and 11.2% for...
Authors
Andrew Ramey, John Pearce, Andrew Reeves, J. Christian Franson, Margaret Petersen, S. Ip
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center

Comparative mitochondrial genetics of North American and Eurasian mergansers with an emphasis on the endangered scaly-sided merganser (Mergus squamatus) Comparative mitochondrial genetics of North American and Eurasian mergansers with an emphasis on the endangered scaly-sided merganser (Mergus squamatus)

The scaly-sided merganser, Mergus squamatus, is considered one of the most threatened sea duck species in the Palearctic with limited breeding and wintering distribution in China and Russia. To provide information for future conservation efforts, we sequenced a portion of the mitochondrial (mt) DNA control region in four species of mergansers and three additional sea duck taxa to...
Authors
Diana Solovyeva, John Pearce
By
Ecosystems Mission Area, Alaska Science Center

Interspecific exchange of avian influenza virus genes in Alaska: The influence of trans-hemispheric migratory tendency and breeding ground sympatry Interspecific exchange of avian influenza virus genes in Alaska: The influence of trans-hemispheric migratory tendency and breeding ground sympatry

The movement and transmission of avian influenza viral strains via wild migratory birds may vary by host species as a result of migratory tendency and sympatry with other infected individuals. To examine the roles of host migratory tendency and species sympatry on the movement of Eurasian low-pathogenic avian influenza (LPAI) genes into North America, we characterized migratory patterns...
Authors
John Pearce, Andrew Reeves, Andrew Ramey, Jerry Hupp, S. Ip, M. Bertram, M.J. Petrula, B.D. Scotton, K.A. Trust, Brandt Meixell, J.A. Runstadler
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center

Variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in Japan Variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in Japan

In North America, spring migration routes and breeding distribution of northern pintails Anas acuta vary because some individuals opportunistically nest at mid-latitudes in years when ephemeral prairie wetlands are available, whereas others regularly nest in arctic and sub-arctic regions where wetland abundance is more constant. Less was known about migration routes and breeding...
Authors
Jerry Hupp, Noriyuki Yamaguchi, Paul Flint, John Pearce, Ken-ichi Tokita, Tetsuo Shimada, Andrew Ramey, Sergei Kharitonov, Hiroyoshi Higuchi
By
Ecosystems Mission Area, Alaska Science Center

Satellite‐tracking of Northern Pintail Anas acuta during outbreaks of the H5N1 virus in Japan: Implications for virus spread Satellite‐tracking of Northern Pintail Anas acuta during outbreaks of the H5N1 virus in Japan: Implications for virus spread

We fitted Northern Pintail Anas acuta in Japan with satellite transmitters and monitored their spring migration movements relative to locations where the highly pathogenic H5N1 avian influenza virus was detected in Whooper Swans Cygnus cygnus in 2008. Pintails were assumed not to be infected with the H5N1 virus at the time they were marked because capture occurred between 2 and 5 months...
Authors
Noriyuki Yamaguchi, Jerry Hupp, Hiroyoshi Higuchi, Paul Flint, John Pearce
By
Ecosystems Mission Area, Alaska Science Center

Intercontinental reassortment and genomic variation of low pathogenic avian influenza viruses isolated from northern pintails (Anas acuta) in Alaska: examining the evidence through space and time Intercontinental reassortment and genomic variation of low pathogenic avian influenza viruses isolated from northern pintails (Anas acuta) in Alaska: examining the evidence through space and time

Migration and population genetic data for northern pintails (Anas acuta) and phylogenetic analysis of low pathogenic avian influenza (LPAI) viruses from this host in Alaska suggest that northern pintails are involved in ongoing intercontinental transmission of avian influenza. Here, we further refine this conclusion through phylogenetic analyses which demonstrate that detection of...
Authors
Andrew Ramey, John Pearce, Paul Flint, S. Ip, Dirk Derksen, J. Christian Franson, Michael Petrula, Bradley Scotton, Kristine Sowl, Michael Wege, Kimberly Trust
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center

Science and Products

Filter Total Items: 42
A Yellow-billed Loon swimming in a small lake

Science Informing Endangered Species Act Decisions and Recovery Planning

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing Endangered Species Act decisions and...
By
Species Management Research Program, Alaska Science Center
Science Informing Endangered Species Act Decisions and Recovery Planning

Science Informing Endangered Species Act Decisions and Recovery Planning

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing Endangered Species Act decisions and...
Learn More
Two Black Brant in a wetland near the Colville River Delta

Science Informing the Status and Trends of Migratory Birds

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making on the status and trends...
By
Ecosystems Mission Area, Species Management Research Program, Alaska Science Center
Science Informing the Status and Trends of Migratory Birds

Science Informing the Status and Trends of Migratory Birds

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making on the status and trends...
Learn More
A satellite tagged Pacific walrus on a piece of sea ice

Science for Oil and Gas Leasing-related Decisions

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making for oil and gas leasing...
By
Species Management Research Program, Alaska Science Center
Science for Oil and Gas Leasing-related Decisions

Science for Oil and Gas Leasing-related Decisions

Through the Changing Arctic Ecosystems (CAE) Initiative, the U.S. Geological Survey (USGS) is informing key resource management decisions by better understanding how wildlife populations of special interest to the Department of the Interior (DOI) are responding to rapid physical changes in the Arctic. Below are some examples of how CAE research is informing decision-making for oil and gas leasing...
Learn More
A satellite tagged Pacific walrus on a piece of sea ice

Marine Ecosystems

The USGS conducts research on marine wildlife, habitats, and processes to provide science to inform our partners as they make decisions relative to species status, resource use, and human activities.
By
Ecosystems Mission Area, Land Management Research Program, Species Management Research Program, Alaska Science Center
Marine Ecosystems

Marine Ecosystems

The USGS conducts research on marine wildlife, habitats, and processes to provide science to inform our partners as they make decisions relative to species status, resource use, and human activities.
Learn More
Snow Goose near the Colville River, northern Alaska

Broad-scale Research Conducted Across the 1002 Area and the NPR-A of Alaska

Selected Bibliography of Broad-scale Research Involving USGS and Conducted Across the 1002 Area and the NPR-A of Alaska Compiled as of 12/17/2018
By
Land Management Research Program, Species Management Research Program, Alaska Science Center
Broad-scale Research Conducted Across the 1002 Area and the NPR-A of Alaska

Broad-scale Research Conducted Across the 1002 Area and the NPR-A of Alaska

Selected Bibliography of Broad-scale Research Involving USGS and Conducted Across the 1002 Area and the NPR-A of Alaska Compiled as of 12/17/2018
Learn More
A stream flowing from a small lake on the Arctic Coastal Plain

Research Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area)

Selected Bibliography of Research Involving USGS and Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area) Compiled as of 12/17/2018
By
Species Management Research Program, Alaska Science Center
Research Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area)

Research Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area)

Selected Bibliography of Research Involving USGS and Conducted in the Arctic National Wildlife Refuge (ANWR) Coastal Plain (1002 Area) Compiled as of 12/17/2018
Learn More
No Result Found
Filter Total Items: 29
No results found.
Filter Total Items: 80

Behavioral vs. molecular sources of conflict between nuclear and mitochondrial DNA: The role of male-biased dispersal in a Holarctic sea duck Behavioral vs. molecular sources of conflict between nuclear and mitochondrial DNA: The role of male-biased dispersal in a Holarctic sea duck

Genetic studies of waterfowl (Anatidae) have observed the full spectrum of mitochondrial (mt) DNA population divergence, from apparent panmixia to deep, reciprocally monophyletic lineages. Yet, these studies often found weak or no nuclear (nu) DNA structure, which was often attributed to male-biased gene flow, a common behaviour within this family. An alternative explanation for this...
Authors
Jeffrey Peters, Kimberly Bolender, John Pearce
By
Ecosystems Mission Area, Alaska Science Center

Glass wool filters for concentrating waterborne viruses and agricultural zoonotic pathogens Glass wool filters for concentrating waterborne viruses and agricultural zoonotic pathogens

The key first step in evaluating pathogen levels in suspected contaminated water is concentration. Concentration methods tend to be specific for a particular pathogen group, for example US Environmental Protection Agency Method 1623 for Giardia and Cryptosporidium1, which means multiple methods are required if the sampling program is targeting more than one pathogen group. Another...
Authors
Hana Millen, Jordan Gonnering, Ryan Berg, Susan K. Spencer, William Jokela, John Pearce, Jackson S. Borchardt, Mark A. Borchardt
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds

Surveillance has revealed low prevalence of avian influenza viruses (AIV) in shorebirds except Ruddy Turnstones (Arenaria interpres) on the North American Atlantic coast. Similarly, of five species of shorebirds surveyed in Alaska in 2010, Ruddy Turnstones had the highest AIV antibody prevalence; prevalence of AIV RNA was low or zero.
Authors
John Pearce, Daniel Ruthrauff, Jeffrey Hall
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center

SYBR green-based real-time reverse transcription-PCR for typing and subtyping of all hemagglutinin and neuraminidase genes of avian influenza viruses and comparison to standard serological subtyping tests SYBR green-based real-time reverse transcription-PCR for typing and subtyping of all hemagglutinin and neuraminidase genes of avian influenza viruses and comparison to standard serological subtyping tests

Continuing outbreaks of H5N1 highly pathogenic (HP) avian influenza virus (AIV) infections of wild birds and poultry worldwide emphasize the need for global surveillance of wild birds. To support the future surveillance activities, we developed a SYBR green-based, real-time reverse transcriptase PCR (rRT-PCR) for detecting nucleoprotein (NP) genes and subtyping 16 hemagglutinin (HA) and...
Authors
K. Tsukamoto, P.C. Javier, M. Shishido, D. Noguchi, John Pearce, H.-M. Kang, O.M. Jeong, Y.-J. Lee, K. Nakanishi, T. Ashizawa
By
Ecosystems Mission Area, Alaska Science Center

Habitat use and movement patterns of Northern Pintails during spring in northern Japan: the importance of agricultural lands Habitat use and movement patterns of Northern Pintails during spring in northern Japan: the importance of agricultural lands

From 2006 to 2009, we marked 198 Northern Pintails (Anas acuta) with satellite transmitters on their wintering areas in Japan to study their migration routes and habitat use in spring staging areas. We hypothesized that the distribution of pintails during spring staging was influenced by patterns of land use and expected that the most frequently used areas would have more agricultural...
Authors
Noriyuki Yamaguchi, Jerry Hupp, Paul Flint, John Pearce, Yusuke Shigeta, Tetsuo Shimada, Emiko Hiraoka, Hiroyoshi Higuchi
By
Ecosystems Mission Area, Alaska Science Center

Interspecies transmission and limited persistence of low pathogenic avian influenza genomes among Alaska dabbling ducks Interspecies transmission and limited persistence of low pathogenic avian influenza genomes among Alaska dabbling ducks

The reassortment and geographic distribution of low pathogenic avian influenza (LPAI) virus genes are well documented, but little is known about the persistence of intact LPAI genomes among species and locations. To examine persistence of entire LPAI genome constellations in Alaska, we calculated the genetic identities among 161 full-genome LPAI viruses isolated across 4 years from five...
Authors
Andrew Reeves, John Pearce, Andrew Ramey, Brandt Meixell, Jonathan Runstadler
By
Ecosystems Mission Area, Alaska Science Center

Evidence for limited exchange of avian influenza viruses between seaducks and dabbling ducks at Alaska Peninsula coastal lagoons Evidence for limited exchange of avian influenza viruses between seaducks and dabbling ducks at Alaska Peninsula coastal lagoons

Avian influenza virus (AIV) prevalence and sequence data were analyzed for Steller's eiders (Polysticta stelleri) to assess the role of this species in transporting virus genes between continents and maintaining a regional viral reservoir with sympatric northern pintails (Anas acuta). AIV prevalence was 0.2% at Izembek Lagoon and 3.9% at Nelson Lagoon for Steller's eiders and 11.2% for...
Authors
Andrew Ramey, John Pearce, Andrew Reeves, J. Christian Franson, Margaret Petersen, S. Ip
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center

Comparative mitochondrial genetics of North American and Eurasian mergansers with an emphasis on the endangered scaly-sided merganser (Mergus squamatus) Comparative mitochondrial genetics of North American and Eurasian mergansers with an emphasis on the endangered scaly-sided merganser (Mergus squamatus)

The scaly-sided merganser, Mergus squamatus, is considered one of the most threatened sea duck species in the Palearctic with limited breeding and wintering distribution in China and Russia. To provide information for future conservation efforts, we sequenced a portion of the mitochondrial (mt) DNA control region in four species of mergansers and three additional sea duck taxa to...
Authors
Diana Solovyeva, John Pearce
By
Ecosystems Mission Area, Alaska Science Center

Interspecific exchange of avian influenza virus genes in Alaska: The influence of trans-hemispheric migratory tendency and breeding ground sympatry Interspecific exchange of avian influenza virus genes in Alaska: The influence of trans-hemispheric migratory tendency and breeding ground sympatry

The movement and transmission of avian influenza viral strains via wild migratory birds may vary by host species as a result of migratory tendency and sympatry with other infected individuals. To examine the roles of host migratory tendency and species sympatry on the movement of Eurasian low-pathogenic avian influenza (LPAI) genes into North America, we characterized migratory patterns...
Authors
John Pearce, Andrew Reeves, Andrew Ramey, Jerry Hupp, S. Ip, M. Bertram, M.J. Petrula, B.D. Scotton, K.A. Trust, Brandt Meixell, J.A. Runstadler
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center

Variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in Japan Variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in Japan

In North America, spring migration routes and breeding distribution of northern pintails Anas acuta vary because some individuals opportunistically nest at mid-latitudes in years when ephemeral prairie wetlands are available, whereas others regularly nest in arctic and sub-arctic regions where wetland abundance is more constant. Less was known about migration routes and breeding...
Authors
Jerry Hupp, Noriyuki Yamaguchi, Paul Flint, John Pearce, Ken-ichi Tokita, Tetsuo Shimada, Andrew Ramey, Sergei Kharitonov, Hiroyoshi Higuchi
By
Ecosystems Mission Area, Alaska Science Center

Satellite‐tracking of Northern Pintail Anas acuta during outbreaks of the H5N1 virus in Japan: Implications for virus spread Satellite‐tracking of Northern Pintail Anas acuta during outbreaks of the H5N1 virus in Japan: Implications for virus spread

We fitted Northern Pintail Anas acuta in Japan with satellite transmitters and monitored their spring migration movements relative to locations where the highly pathogenic H5N1 avian influenza virus was detected in Whooper Swans Cygnus cygnus in 2008. Pintails were assumed not to be infected with the H5N1 virus at the time they were marked because capture occurred between 2 and 5 months...
Authors
Noriyuki Yamaguchi, Jerry Hupp, Hiroyoshi Higuchi, Paul Flint, John Pearce
By
Ecosystems Mission Area, Alaska Science Center

Intercontinental reassortment and genomic variation of low pathogenic avian influenza viruses isolated from northern pintails (Anas acuta) in Alaska: examining the evidence through space and time Intercontinental reassortment and genomic variation of low pathogenic avian influenza viruses isolated from northern pintails (Anas acuta) in Alaska: examining the evidence through space and time

Migration and population genetic data for northern pintails (Anas acuta) and phylogenetic analysis of low pathogenic avian influenza (LPAI) viruses from this host in Alaska suggest that northern pintails are involved in ongoing intercontinental transmission of avian influenza. Here, we further refine this conclusion through phylogenetic analyses which demonstrate that detection of...
Authors
Andrew Ramey, John Pearce, Paul Flint, S. Ip, Dirk Derksen, J. Christian Franson, Michael Petrula, Bradley Scotton, Kristine Sowl, Michael Wege, Kimberly Trust
By
Ecosystems Mission Area, Alaska Science Center, National Wildlife Health Center
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