Daniel Day
Dan is a Wildlife Biologist at the Eastern Ecological Science Center in Laurel, MD.
Duties include field and laboratory research on wildlife, including study of their diet and habitat they occupy. Current research focuses on resource utilization by various avian species residing or over-wintering on the Chesapeake Bay.
Science and Products
Filter Total Items: 16
Role of manganese oxides in the exposure of mute swans (Cygnus olor) to Pb and other elements in the Chesapeake Bay, USA Role of manganese oxides in the exposure of mute swans (Cygnus olor) to Pb and other elements in the Chesapeake Bay, USA
The aims of this study are to estimate exposure of waterfowl to elements in contaminated sediments in the Chesapeake Bay and to consider the potential role of Mn in influencing bioavailability and exposure. Metal concentrations were measured in livers and digesta taken from mute swans living on the Aberdeen Proving Ground, whose sediment had elevated concentrations of Cu, S, Se, Zn, As...
Authors
W. N. Beyer, D. Day
Mute swans: Natural (?) environmental indicators Mute swans: Natural (?) environmental indicators
The rapid expansion of the Chesapeake Bay's population of feral mute swans (Cygnus olar), coupled with a dramatic Bay-wide decline in submerged aquatic vegetation (SAV), has fueled much of the current debate surrounding the need for a management plan to protect the aquatic food resources that are critical to many species native to the Bay. Crucial to this decision process is a sound...
Authors
D. Day
Toxicity of lead-contaminated sediment to mute swans Toxicity of lead-contaminated sediment to mute swans
Most ecotoxicological risk assessments of wildlife emphasize contaminant exposure through ingestion of food and water. However, the role of incidental ingestion of sediment-bound contaminants has not been adequately appreciated in these assessments. This study evaluates the toxicological consequences of contamination of sediments with metals from hard-rock mining and smelting activities...
Authors
D. D. Day, W. N. Beyer, D. J. Hoffman, Alexandra Morton, L. Sileo, D. J. Audet, M. A. Ottinger
Metal concentrations in zebra mussels and sediments from embayments and riverine environments of eastern Lake Erie, southern Lake Ontario, and the Niagara River Metal concentrations in zebra mussels and sediments from embayments and riverine environments of eastern Lake Erie, southern Lake Ontario, and the Niagara River
Concentrations of 14 metals were studied in the soft tissues of zebra mussels (Dreissena polymorpha) and sediments from 16 Great Lakes embayments and riverine environments. Samples were collected in 1993 and 1994 during the early and late autumn period when the body mass of mussels is least affected by reproductive activities. There was a significant difference in geometric mean...
Authors
T. P. Lowe, D. D. Day
Relation of waterfowl poisoning to sediment lead concentrations in the Coeur d'Alene River Basin Relation of waterfowl poisoning to sediment lead concentrations in the Coeur d'Alene River Basin
For many years, waterfowl have been poisoned by lead after ingesting contaminated sediment in the Coeur d'Alene River Basin, in Idaho. Results of studies on waterfowl experimentally fed this sediment were combined with results from field studies conducted in the Basin to relate sediment lead concentration to injury to waterfowl. The first step in the model estimated exposure as the...
Authors
W. N. Beyer, D. J. Audet, G. H. Heinz, D. J. Hoffman, D. Day
Toxicity of Anacostia River, Washington, D.C., USA, sediment fed to mute swans (Cygnus olor) Toxicity of Anacostia River, Washington, D.C., USA, sediment fed to mute swans (Cygnus olor)
Sediment ingestion is sometimes the principal route by which waterfowl are exposed to environmental contaminants, and at severely contaminated sites waterfowl have been killed by ingesting sediment. Mute swans (Cygnus olor) were fed a diet for 6 weeks with a high but environmentally realistic concentration (24%) of sediment from the moderately polluted Anacostia River in the District of...
Authors
W. N. Beyer, D. Day, M. J. Melancon, L. Sileo
Science and Products
Filter Total Items: 16
Role of manganese oxides in the exposure of mute swans (Cygnus olor) to Pb and other elements in the Chesapeake Bay, USA Role of manganese oxides in the exposure of mute swans (Cygnus olor) to Pb and other elements in the Chesapeake Bay, USA
The aims of this study are to estimate exposure of waterfowl to elements in contaminated sediments in the Chesapeake Bay and to consider the potential role of Mn in influencing bioavailability and exposure. Metal concentrations were measured in livers and digesta taken from mute swans living on the Aberdeen Proving Ground, whose sediment had elevated concentrations of Cu, S, Se, Zn, As...
Authors
W. N. Beyer, D. Day
Mute swans: Natural (?) environmental indicators Mute swans: Natural (?) environmental indicators
The rapid expansion of the Chesapeake Bay's population of feral mute swans (Cygnus olar), coupled with a dramatic Bay-wide decline in submerged aquatic vegetation (SAV), has fueled much of the current debate surrounding the need for a management plan to protect the aquatic food resources that are critical to many species native to the Bay. Crucial to this decision process is a sound...
Authors
D. Day
Toxicity of lead-contaminated sediment to mute swans Toxicity of lead-contaminated sediment to mute swans
Most ecotoxicological risk assessments of wildlife emphasize contaminant exposure through ingestion of food and water. However, the role of incidental ingestion of sediment-bound contaminants has not been adequately appreciated in these assessments. This study evaluates the toxicological consequences of contamination of sediments with metals from hard-rock mining and smelting activities...
Authors
D. D. Day, W. N. Beyer, D. J. Hoffman, Alexandra Morton, L. Sileo, D. J. Audet, M. A. Ottinger
Metal concentrations in zebra mussels and sediments from embayments and riverine environments of eastern Lake Erie, southern Lake Ontario, and the Niagara River Metal concentrations in zebra mussels and sediments from embayments and riverine environments of eastern Lake Erie, southern Lake Ontario, and the Niagara River
Concentrations of 14 metals were studied in the soft tissues of zebra mussels (Dreissena polymorpha) and sediments from 16 Great Lakes embayments and riverine environments. Samples were collected in 1993 and 1994 during the early and late autumn period when the body mass of mussels is least affected by reproductive activities. There was a significant difference in geometric mean...
Authors
T. P. Lowe, D. D. Day
Relation of waterfowl poisoning to sediment lead concentrations in the Coeur d'Alene River Basin Relation of waterfowl poisoning to sediment lead concentrations in the Coeur d'Alene River Basin
For many years, waterfowl have been poisoned by lead after ingesting contaminated sediment in the Coeur d'Alene River Basin, in Idaho. Results of studies on waterfowl experimentally fed this sediment were combined with results from field studies conducted in the Basin to relate sediment lead concentration to injury to waterfowl. The first step in the model estimated exposure as the...
Authors
W. N. Beyer, D. J. Audet, G. H. Heinz, D. J. Hoffman, D. Day
Toxicity of Anacostia River, Washington, D.C., USA, sediment fed to mute swans (Cygnus olor) Toxicity of Anacostia River, Washington, D.C., USA, sediment fed to mute swans (Cygnus olor)
Sediment ingestion is sometimes the principal route by which waterfowl are exposed to environmental contaminants, and at severely contaminated sites waterfowl have been killed by ingesting sediment. Mute swans (Cygnus olor) were fed a diet for 6 weeks with a high but environmentally realistic concentration (24%) of sediment from the moderately polluted Anacostia River in the District of...
Authors
W. N. Beyer, D. Day, M. J. Melancon, L. Sileo