Thomas Custer (Former Employee)
Science and Products
Filter Total Items: 167
Dioxins and congener-specific polychlorinated biphenyls in three avian species from the Wisconsin River, Wisconsin Dioxins and congener-specific polychlorinated biphenyls in three avian species from the Wisconsin River, Wisconsin
Sediments from the Wisconsin River, WI, USA are contaminated with 2,3,7,8-tetrachloro-p-dioxin (TCDD) and polychlorinated biphenyls (PCBs). Wet weight concentrations of TCDD and PCBs in eggs were at background levels and highest in the piscivorous hooded merganser (Lophodytes cucullatus; geometric mean=7 pg/g TCDD and 0.92 μg/g PCBs) and lowest in the omnivorous wood duck (Aix sponsa) (
Authors
T. W. Custer, Christine M. Custer, Randy K. Hines
Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants
DNA sequence analysis of a 215 base-pair region of the mitochondrial cytochrome b gene was used to examine genetic variation and search for evidence of an increased mutation rate in black-crowned night-herons. We examined five populations exposed to environmental contamination (primarily PAHs and PCBs) and one reference population from the eastern U.S. There was no evidence of a high...
Authors
Christopher R. Dahl, John W. Bickham, Jeffery K. Wickliffe, Thomas W. Custer
Polycyclic aromatic hydrocarbons, aliphatic hydrocarbons, trace elements and monooxygenase activity in birds nesting on the North Platte River, Casper, Wyoming, USA Polycyclic aromatic hydrocarbons, aliphatic hydrocarbons, trace elements and monooxygenase activity in birds nesting on the North Platte River, Casper, Wyoming, USA
Tree swallow (Tachycineta bicolor) and house wren (Troglodytes aedon) eggs and chicks were collected near a refinery site on the North Platte River, Casper, Wyoming, USA and at a reference site 10 km upstream. Total polycylic aromatic hydrocarbon (PAH) concentrations in swallow and wren chicks were higher at the refinery site than at the reference site. Polycylic aromatic hydrocarbon
Authors
T. W. Custer, Christine M. Custer, K. Dickerson, K. Allen, M. J. Melancon, L.J. Schmidt
Do polychlorinated biphenyls contribute to reproduction effects in fish-eating birds? Do polychlorinated biphenyls contribute to reproduction effects in fish-eating birds?
No abstract available.
Authors
T. W. Custer, Christine M. Custer, R. K. Hines, S. Gutreuter, K. L. Stromborg, P. David Allen, M. J. Melancon
Organochlorine contaminants and biomarker response in double-crested cormorants nesting in Green Bay and Lake Michigan, Wisconsin, USA Organochlorine contaminants and biomarker response in double-crested cormorants nesting in Green Bay and Lake Michigan, Wisconsin, USA
Double-crested cormorant (Phalacrocorax auritus) eggs at pipping and sibling 10-day-old chicks were collected from two colonies in Green Bay, WI, one colony in Lake Michigan, WI, and reference colonies in South Dakota and Minnesota. Egg contents and chicks were analyzed for organochlorine contaminants including polychlorinated biphenyl (PCB) congeners. Livers of embryos and chicks were...
Authors
T. W. Custer, Christine M. Custer, R. K. Hines, K. L. Stromborg, P. David Allen, M. J. Melancon, D.S. Henshel
Environmental contaminants Environmental contaminants
Throughout the world, individuals and populations of herons are affected by environmental contaminants, leading to direct mortality, decreased reproductive success, or degradation of feeding habitat. Contaminants suspected or known to affect herons include organochlorine compounds, organophosphorus insecticides, trace elements, and petroleum (Parnell et al. 1988).General reviews on the...
Authors
T. W. Custer
Science and Products
Filter Total Items: 167
Dioxins and congener-specific polychlorinated biphenyls in three avian species from the Wisconsin River, Wisconsin Dioxins and congener-specific polychlorinated biphenyls in three avian species from the Wisconsin River, Wisconsin
Sediments from the Wisconsin River, WI, USA are contaminated with 2,3,7,8-tetrachloro-p-dioxin (TCDD) and polychlorinated biphenyls (PCBs). Wet weight concentrations of TCDD and PCBs in eggs were at background levels and highest in the piscivorous hooded merganser (Lophodytes cucullatus; geometric mean=7 pg/g TCDD and 0.92 μg/g PCBs) and lowest in the omnivorous wood duck (Aix sponsa) (
Authors
T. W. Custer, Christine M. Custer, Randy K. Hines
Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants
DNA sequence analysis of a 215 base-pair region of the mitochondrial cytochrome b gene was used to examine genetic variation and search for evidence of an increased mutation rate in black-crowned night-herons. We examined five populations exposed to environmental contamination (primarily PAHs and PCBs) and one reference population from the eastern U.S. There was no evidence of a high...
Authors
Christopher R. Dahl, John W. Bickham, Jeffery K. Wickliffe, Thomas W. Custer
Polycyclic aromatic hydrocarbons, aliphatic hydrocarbons, trace elements and monooxygenase activity in birds nesting on the North Platte River, Casper, Wyoming, USA Polycyclic aromatic hydrocarbons, aliphatic hydrocarbons, trace elements and monooxygenase activity in birds nesting on the North Platte River, Casper, Wyoming, USA
Tree swallow (Tachycineta bicolor) and house wren (Troglodytes aedon) eggs and chicks were collected near a refinery site on the North Platte River, Casper, Wyoming, USA and at a reference site 10 km upstream. Total polycylic aromatic hydrocarbon (PAH) concentrations in swallow and wren chicks were higher at the refinery site than at the reference site. Polycylic aromatic hydrocarbon
Authors
T. W. Custer, Christine M. Custer, K. Dickerson, K. Allen, M. J. Melancon, L.J. Schmidt
Do polychlorinated biphenyls contribute to reproduction effects in fish-eating birds? Do polychlorinated biphenyls contribute to reproduction effects in fish-eating birds?
No abstract available.
Authors
T. W. Custer, Christine M. Custer, R. K. Hines, S. Gutreuter, K. L. Stromborg, P. David Allen, M. J. Melancon
Organochlorine contaminants and biomarker response in double-crested cormorants nesting in Green Bay and Lake Michigan, Wisconsin, USA Organochlorine contaminants and biomarker response in double-crested cormorants nesting in Green Bay and Lake Michigan, Wisconsin, USA
Double-crested cormorant (Phalacrocorax auritus) eggs at pipping and sibling 10-day-old chicks were collected from two colonies in Green Bay, WI, one colony in Lake Michigan, WI, and reference colonies in South Dakota and Minnesota. Egg contents and chicks were analyzed for organochlorine contaminants including polychlorinated biphenyl (PCB) congeners. Livers of embryos and chicks were...
Authors
T. W. Custer, Christine M. Custer, R. K. Hines, K. L. Stromborg, P. David Allen, M. J. Melancon, D.S. Henshel
Environmental contaminants Environmental contaminants
Throughout the world, individuals and populations of herons are affected by environmental contaminants, leading to direct mortality, decreased reproductive success, or degradation of feeding habitat. Contaminants suspected or known to affect herons include organochlorine compounds, organophosphorus insecticides, trace elements, and petroleum (Parnell et al. 1988).General reviews on the...
Authors
T. W. Custer