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
Acute toxicity and sublethal effects of white phosphorus in mute swans, Cygnus olor Acute toxicity and sublethal effects of white phosphorus in mute swans, Cygnus olor
Among the waterfowl affected by white phosphorus (P4) at a military base in Alaska are tundra (Cygnus columbianus) and trumpeter (C. buccinator) swans. To estimate the toxicity of P4 to swans and compare the toxic effects to those of mallards (Anas platyrhynchos), we dosed 30 juvenile mute swans (C. olor) with 0 to 5.28 mg P4/kg body weight. The calculated LD50 was 3.65 mg/kg (95% CI: 1...
Authors
D. W. Sparling, D. Day, P. Klein
Metal and sediment ingestion by dabbling ducks Metal and sediment ingestion by dabbling ducks
The chemical analysis of intestinal digesta from hunter-killed carcasses or of wildlife scat is a promising means of estimating the exposure of wildlife to those environmental contaminants that, like lead, are poorly absorbed in the digestive tract. When evaluating contaminants at a site, biologists may find the results of this non-destructive approach more straightforward to interpret...
Authors
W. N. Beyer, J. Spann, D. Day
Relation of lead exposure to sediment ingestion in mute swans on the Chesapeake Bay, USA Relation of lead exposure to sediment ingestion in mute swans on the Chesapeake Bay, USA
Although wildlife risk assessments are generally based on the accumulation of environmental contaminants through food chains, wildlife may also ingest contaminants incidentally with sediment. Forty-two mute swans (Cygnus olor) were collected from unpolluted portions of central Chesapeake Bay, Maryland, USA, in spring 1995, and their intestinal digesta were analyzed for 13 metals...
Authors
W. N. Beyer, D. Day, Alexandra Morton, Y. Pachepsky
Responses of amphibian populations to water and soil factors in experimentally-treated aquatic macrocosms Responses of amphibian populations to water and soil factors in experimentally-treated aquatic macrocosms
Survival of anuran embryos and tadpoles is reduced in acidic (pH
Authors
D. W. Sparling, T. P. Lowe, D. Day, K. Dolan
Science and Products
Filter Total Items: 16
Acute toxicity and sublethal effects of white phosphorus in mute swans, Cygnus olor Acute toxicity and sublethal effects of white phosphorus in mute swans, Cygnus olor
Among the waterfowl affected by white phosphorus (P4) at a military base in Alaska are tundra (Cygnus columbianus) and trumpeter (C. buccinator) swans. To estimate the toxicity of P4 to swans and compare the toxic effects to those of mallards (Anas platyrhynchos), we dosed 30 juvenile mute swans (C. olor) with 0 to 5.28 mg P4/kg body weight. The calculated LD50 was 3.65 mg/kg (95% CI: 1...
Authors
D. W. Sparling, D. Day, P. Klein
Metal and sediment ingestion by dabbling ducks Metal and sediment ingestion by dabbling ducks
The chemical analysis of intestinal digesta from hunter-killed carcasses or of wildlife scat is a promising means of estimating the exposure of wildlife to those environmental contaminants that, like lead, are poorly absorbed in the digestive tract. When evaluating contaminants at a site, biologists may find the results of this non-destructive approach more straightforward to interpret...
Authors
W. N. Beyer, J. Spann, D. Day
Relation of lead exposure to sediment ingestion in mute swans on the Chesapeake Bay, USA Relation of lead exposure to sediment ingestion in mute swans on the Chesapeake Bay, USA
Although wildlife risk assessments are generally based on the accumulation of environmental contaminants through food chains, wildlife may also ingest contaminants incidentally with sediment. Forty-two mute swans (Cygnus olor) were collected from unpolluted portions of central Chesapeake Bay, Maryland, USA, in spring 1995, and their intestinal digesta were analyzed for 13 metals...
Authors
W. N. Beyer, D. Day, Alexandra Morton, Y. Pachepsky
Responses of amphibian populations to water and soil factors in experimentally-treated aquatic macrocosms Responses of amphibian populations to water and soil factors in experimentally-treated aquatic macrocosms
Survival of anuran embryos and tadpoles is reduced in acidic (pH
Authors
D. W. Sparling, T. P. Lowe, D. Day, K. Dolan