Thomas Custer (Former Employee)
Science and Products
Filter Total Items: 166
Reproductive success and heavy metal contamination in Rhode Island common terns Reproductive success and heavy metal contamination in Rhode Island common terns
Common tern cIutch size, reproductive success and growth of young recorded from an abandoned barge on the Providence River, an area of heavy metal contamination, were equal to, or greater than, .from less contaminated areas. Concentrations of copper and zinc were higher in livers of nestling terns from the Providence River than from other, less contaminated, areas. However...
Authors
T. W. Custer, J. C. Franson, John F. Moore, J.E. Myers
Organochlorine concentrations in prefledging common terns at three Rhode Island colonies Organochlorine concentrations in prefledging common terns at three Rhode Island colonies
Concentrations of DDE, polychlorinated biphenyls (PCBs), and polychlorinated diphenyl ethers (PCDPEs) in carcasses of prefledging Common Terns (Sterna hirundo) at three Rhode Island colonies support the hypothesis that local contamination is responsible for among-colony differences observed in eggs in an earlier study. The highest concentrations of DDE and PCBs (mean = 0.24 and 2.8 ppm...
Authors
T. W. Custer, C.M. Bunck, C. J. Stafford
Effects on wildlife of ethyl and methyl parathion applied to California rice fields Effects on wildlife of ethyl and methyl parathion applied to California rice fields
Selected rice fields on the Sacramento National Wildlife Refuge Complex were aerially sprayed one time during May or June 1982 with either ethyl (0.11 kg Al/ha) or methyl (0.84 kg AI/ha) parathion for control of tadpole shrimp, Triops longicaudatus. No sick or dead vertebrate wildlife were found or adjacent to the treated rice fields after spraying. Specimens of the following birds and...
Authors
Thomas W. Custer, Elwood F. Hill, Harry M. Ohlendorf
Reproduction and organochlorine contaminants in terns at San Diego Bay Reproduction and organochlorine contaminants in terns at San Diego Bay
In 1981, we studied Caspian Terns (Sterna caspia) and Elegant Terns (S. elegans) nesting at the south end of San Diego Bay, California. Randomly collected Caspian Tern eggs contained signficantly (P 0.05) higher mean concentrations of DDE (9.30 ppm) than did Elegant Tern eggs (3.79 ppm). DDE may have had an adverse effect on Caspian Tern reproduction but the relationship between hatching...
Authors
H. M. Ohlendorf, F.C. Schaffner, T. W. Custer, C. J. Stafford
Effects of wildlife of ethyl and methyl parathion applied to California USA rice fields Effects of wildlife of ethyl and methyl parathion applied to California USA rice fields
Selected rice fields on the Sacramento National Wildlife Refuge Complex were aerially sprayed one time during May or June 1982 with either ethyl (0.11 kg Al/ha) or methyl (0.84 kg AI/ha) parathion for control of tadpole shrimp, Triops longicaudatus. No sick or dead vertebrate wildlife were found or adjacent to the treated rice fields after spraying. Specimens of the following birds and...
Authors
T. W. Custer, E. F. Hill, H. M. Ohlendorf
Organochlorine concentrations in prefledging common terns Sterna hirundo at three Rhode Island USA colonies Organochlorine concentrations in prefledging common terns Sterna hirundo at three Rhode Island USA colonies
Concentrations of DDE, polychlorinated biphenyls (PCBs), and polychlorinated diphenyl ethers (PCDPEs) in carcasses of prefledging Common Terns (Sterna hirundo) at three Rhode Island colonies support the hypothesis that local contamination is responsible for among-colony differences observed in eggs in an earlier study. The highest concentrations of DDE and PCBs (mean=0.24 and 2.8 ppm wet...
Authors
T. W. Custer, C.M. Bunck, C.L. Stafford
Science and Products
Filter Total Items: 166
Reproductive success and heavy metal contamination in Rhode Island common terns Reproductive success and heavy metal contamination in Rhode Island common terns
Common tern cIutch size, reproductive success and growth of young recorded from an abandoned barge on the Providence River, an area of heavy metal contamination, were equal to, or greater than, .from less contaminated areas. Concentrations of copper and zinc were higher in livers of nestling terns from the Providence River than from other, less contaminated, areas. However...
Authors
T. W. Custer, J. C. Franson, John F. Moore, J.E. Myers
Organochlorine concentrations in prefledging common terns at three Rhode Island colonies Organochlorine concentrations in prefledging common terns at three Rhode Island colonies
Concentrations of DDE, polychlorinated biphenyls (PCBs), and polychlorinated diphenyl ethers (PCDPEs) in carcasses of prefledging Common Terns (Sterna hirundo) at three Rhode Island colonies support the hypothesis that local contamination is responsible for among-colony differences observed in eggs in an earlier study. The highest concentrations of DDE and PCBs (mean = 0.24 and 2.8 ppm...
Authors
T. W. Custer, C.M. Bunck, C. J. Stafford
Effects on wildlife of ethyl and methyl parathion applied to California rice fields Effects on wildlife of ethyl and methyl parathion applied to California rice fields
Selected rice fields on the Sacramento National Wildlife Refuge Complex were aerially sprayed one time during May or June 1982 with either ethyl (0.11 kg Al/ha) or methyl (0.84 kg AI/ha) parathion for control of tadpole shrimp, Triops longicaudatus. No sick or dead vertebrate wildlife were found or adjacent to the treated rice fields after spraying. Specimens of the following birds and...
Authors
Thomas W. Custer, Elwood F. Hill, Harry M. Ohlendorf
Reproduction and organochlorine contaminants in terns at San Diego Bay Reproduction and organochlorine contaminants in terns at San Diego Bay
In 1981, we studied Caspian Terns (Sterna caspia) and Elegant Terns (S. elegans) nesting at the south end of San Diego Bay, California. Randomly collected Caspian Tern eggs contained signficantly (P 0.05) higher mean concentrations of DDE (9.30 ppm) than did Elegant Tern eggs (3.79 ppm). DDE may have had an adverse effect on Caspian Tern reproduction but the relationship between hatching...
Authors
H. M. Ohlendorf, F.C. Schaffner, T. W. Custer, C. J. Stafford
Effects of wildlife of ethyl and methyl parathion applied to California USA rice fields Effects of wildlife of ethyl and methyl parathion applied to California USA rice fields
Selected rice fields on the Sacramento National Wildlife Refuge Complex were aerially sprayed one time during May or June 1982 with either ethyl (0.11 kg Al/ha) or methyl (0.84 kg AI/ha) parathion for control of tadpole shrimp, Triops longicaudatus. No sick or dead vertebrate wildlife were found or adjacent to the treated rice fields after spraying. Specimens of the following birds and...
Authors
T. W. Custer, E. F. Hill, H. M. Ohlendorf
Organochlorine concentrations in prefledging common terns Sterna hirundo at three Rhode Island USA colonies Organochlorine concentrations in prefledging common terns Sterna hirundo at three Rhode Island USA colonies
Concentrations of DDE, polychlorinated biphenyls (PCBs), and polychlorinated diphenyl ethers (PCDPEs) in carcasses of prefledging Common Terns (Sterna hirundo) at three Rhode Island colonies support the hypothesis that local contamination is responsible for among-colony differences observed in eggs in an earlier study. The highest concentrations of DDE and PCBs (mean=0.24 and 2.8 ppm wet...
Authors
T. W. Custer, C.M. Bunck, C.L. Stafford