John B. French, Jr., Ph.D. (Former Employee)
Science and Products
Filter Total Items: 30
A physiologically based toxicokinetic model for methylmercury in female American kestrels A physiologically based toxicokinetic model for methylmercury in female American kestrels
A physiologically based toxicokinetic (PBTK) model was developed to describe the uptake, distribution, and elimination of methylmercury (CH 3Hg) in female American kestrels. The model consists of six tissue compartments corresponding to the brain, liver, kidney, gut, red blood cells, and remaining carcass. Additional compartments describe the elimination of CH3Hg to eggs and growing...
Authors
J.W. Nichols, R.S. Bennett, R. Rossmann, John B. French, K.G. Sappington
Mercury in the blood and eggs of American kestrels fed methylmercury chloride Mercury in the blood and eggs of American kestrels fed methylmercury chloride
American kestrels (Falco sparverius) were fed diets containing methylmercury chloride (MeHg) at 0, 0.6, 1.7, 2.8, 3.9, or 5.0 µg/g (dry wt) starting approximately eight weeks before the onset of egg laying. Dietary treatment was terminated after 12 to 14 weeks, and unhatched eggs were collected for Hg analysis. Blood samples were collected after four weeks of treatment and the...
Authors
John B. French, Richard S. Bennett, Ronald Rossmann
Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008 Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008
The U.S.Geological Survey Great Lakes Science Center has conducted trawl surveys to assess annual changes in the deepwater demersal fish community of Lake Huron since 1973. Since 1992, surveys have been carried out using a 21 m wing trawl towed on-contour at depths ranging from 9 to 110 m on fixed transects. Sample sites include five ports in U.S. waters with less frequent sampling near...
Authors
Edward F. Roseman, Timothy P. O’Brien, Stephen C. Riley, Steve A. Farha, John R. French
A Review and Synthesis of the Scientific Information Related to the Biology and Management of Species of Special Concern at Cape Hatteras National Seashore, North Carolina A Review and Synthesis of the Scientific Information Related to the Biology and Management of Species of Special Concern at Cape Hatteras National Seashore, North Carolina
The U.S. Geological Survey's Patuxent Wildlife Research Center (PWRC) conducted a study for the National Park Service (NPS) Southeast Region, Atlanta, GA, and Cape Hatteras National Seashore (CAHA) in North Carolina to review, evaluate, and summarize the available scientific information for selected species of concern at CAHA (piping plovers, sea turtles, seabeach amaranth, American...
Authors
Jonathan B. Cohen, R. Michael Erwin, John B. French, Jeffrey L. Marion, J. Michael Meyers
Dietary toxicity and tissue accumulation of methylmercury in American kestrels Dietary toxicity and tissue accumulation of methylmercury in American kestrels
American kestrels (Falco sparverius) were fed meat diets containing 0, 3, 6, or 12 ppm (dry weight) methylmercury chloride. Birds fed the 12-ppm diet started to show signs of neurotoxicity after 26 days and all died in 39?49 days. One male kestrel fed the 6-ppm diet died after 75 days of exposure and several others showed signs of neurotoxicity after 45 days. None of the birds fed the 3...
Authors
Richard S. Bennett, John B. French, Ronald Rossmann, Romona J. Haebler
Experimental infection of a North American raptor, American kestrel (Falco sparverius), with highly pathogenic avian influenza virus (H5N1) Experimental infection of a North American raptor, American kestrel (Falco sparverius), with highly pathogenic avian influenza virus (H5N1)
Several species of wild raptors have been found in Eurasia infected with highly pathogenic avian influenza virus (HPAIV) subtype H5N1. Should HPAIV (H5N1) reach North America in migratory birds, species of raptors are at risk not only from environmental exposure, but also from consuming infected birds and carcasses. In this study we used American kestrels as a representative species of a...
Authors
Jeffrey S. Hall, Hon S. Ip, J. C. Franson, C. Meteyer, Sean W. Nashold, Joshua L. Teslaa, J. French, P. Redig, C. Brand
Science and Products
Filter Total Items: 30
A physiologically based toxicokinetic model for methylmercury in female American kestrels A physiologically based toxicokinetic model for methylmercury in female American kestrels
A physiologically based toxicokinetic (PBTK) model was developed to describe the uptake, distribution, and elimination of methylmercury (CH 3Hg) in female American kestrels. The model consists of six tissue compartments corresponding to the brain, liver, kidney, gut, red blood cells, and remaining carcass. Additional compartments describe the elimination of CH3Hg to eggs and growing...
Authors
J.W. Nichols, R.S. Bennett, R. Rossmann, John B. French, K.G. Sappington
Mercury in the blood and eggs of American kestrels fed methylmercury chloride Mercury in the blood and eggs of American kestrels fed methylmercury chloride
American kestrels (Falco sparverius) were fed diets containing methylmercury chloride (MeHg) at 0, 0.6, 1.7, 2.8, 3.9, or 5.0 µg/g (dry wt) starting approximately eight weeks before the onset of egg laying. Dietary treatment was terminated after 12 to 14 weeks, and unhatched eggs were collected for Hg analysis. Blood samples were collected after four weeks of treatment and the...
Authors
John B. French, Richard S. Bennett, Ronald Rossmann
Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008 Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008
The U.S.Geological Survey Great Lakes Science Center has conducted trawl surveys to assess annual changes in the deepwater demersal fish community of Lake Huron since 1973. Since 1992, surveys have been carried out using a 21 m wing trawl towed on-contour at depths ranging from 9 to 110 m on fixed transects. Sample sites include five ports in U.S. waters with less frequent sampling near...
Authors
Edward F. Roseman, Timothy P. O’Brien, Stephen C. Riley, Steve A. Farha, John R. French
A Review and Synthesis of the Scientific Information Related to the Biology and Management of Species of Special Concern at Cape Hatteras National Seashore, North Carolina A Review and Synthesis of the Scientific Information Related to the Biology and Management of Species of Special Concern at Cape Hatteras National Seashore, North Carolina
The U.S. Geological Survey's Patuxent Wildlife Research Center (PWRC) conducted a study for the National Park Service (NPS) Southeast Region, Atlanta, GA, and Cape Hatteras National Seashore (CAHA) in North Carolina to review, evaluate, and summarize the available scientific information for selected species of concern at CAHA (piping plovers, sea turtles, seabeach amaranth, American...
Authors
Jonathan B. Cohen, R. Michael Erwin, John B. French, Jeffrey L. Marion, J. Michael Meyers
Dietary toxicity and tissue accumulation of methylmercury in American kestrels Dietary toxicity and tissue accumulation of methylmercury in American kestrels
American kestrels (Falco sparverius) were fed meat diets containing 0, 3, 6, or 12 ppm (dry weight) methylmercury chloride. Birds fed the 12-ppm diet started to show signs of neurotoxicity after 26 days and all died in 39?49 days. One male kestrel fed the 6-ppm diet died after 75 days of exposure and several others showed signs of neurotoxicity after 45 days. None of the birds fed the 3...
Authors
Richard S. Bennett, John B. French, Ronald Rossmann, Romona J. Haebler
Experimental infection of a North American raptor, American kestrel (Falco sparverius), with highly pathogenic avian influenza virus (H5N1) Experimental infection of a North American raptor, American kestrel (Falco sparverius), with highly pathogenic avian influenza virus (H5N1)
Several species of wild raptors have been found in Eurasia infected with highly pathogenic avian influenza virus (HPAIV) subtype H5N1. Should HPAIV (H5N1) reach North America in migratory birds, species of raptors are at risk not only from environmental exposure, but also from consuming infected birds and carcasses. In this study we used American kestrels as a representative species of a...
Authors
Jeffrey S. Hall, Hon S. Ip, J. C. Franson, C. Meteyer, Sean W. Nashold, Joshua L. Teslaa, J. French, P. Redig, C. Brand