Thomas Custer (Former Employee)
Science and Products
Filter Total Items: 166
Distribution, species abundance, and nesting-site use of Atlantic coast colonies of herons and their allies Distribution, species abundance, and nesting-site use of Atlantic coast colonies of herons and their allies
In 1975 and 1976, eight teams of investigators located 262 colonies of nesting herons and their allies along the Atlantic coast from Florida to Maine. Fourteen species were found in Florida, numbers decreasing to seven in Maine. Colonies censused in the extreme south and north of the study area were lower in number of species and number of adults than those in the intermediate area. More...
Authors
Thomas W. Custer, Ronald G. Osborn, W.F. Stout
Nest site and colony characteristics of wading birds in selected Atlantic Coast colonies Nest site and colony characteristics of wading birds in selected Atlantic Coast colonies
Nests of 5 species of wading birds were identified and marked during the breeding season at 6 locations from Massachusetts to North Carolina. At the end of the breeding season 12 characteristics of nest-site location were measured. Nest locations were mapped to examine dispersion and nearest neighbor relationships. Multivariate analyses were used to describe and compare sites and species...
Authors
Donald L. Beaver, Ronald G. Osborn, Thomas W. Custer
Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254 Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254
A dietary dosage of 25 ppm Aroclor 1254 fed to nine-month-old mallards Anas platyrhynchos for at least a month before egg-laying had no detrimental effect on reproductive success or nest attentiveness when hens were allowed to incubate their own eggs. The treatment caused no effect on number of hens laying, date of first egg laid or clutch size. Fertility of eggs was greater among...
Authors
T. W. Custer, G. H. Heinz
New black-crowned night heron colony found in Rhode Island New black-crowned night heron colony found in Rhode Island
No abstract available.
Authors
T. W. Custer, J.E. Myers, C.C. Allin
Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254 Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254
A dietary dosage of 25 ppm Aroclor 1254 fed to nine-month-old mallards Anas platyrhynchos for at least a month before egg-laying had no detrimental effect on reproductive success or nest attentiveness when hens were allowed to incubate their own eggs. The treatment caused no effect on number of hens laying, date of first egg laid or clutch size. Fertility of eggs was greater among...
Authors
T. W. Custer, G. H. Heinz
Response of captive, breeding mallards to oiled water Response of captive, breeding mallards to oiled water
No abstract available.
Authors
T. W. Custer, P.H. Albers
Science and Products
Filter Total Items: 166
Distribution, species abundance, and nesting-site use of Atlantic coast colonies of herons and their allies Distribution, species abundance, and nesting-site use of Atlantic coast colonies of herons and their allies
In 1975 and 1976, eight teams of investigators located 262 colonies of nesting herons and their allies along the Atlantic coast from Florida to Maine. Fourteen species were found in Florida, numbers decreasing to seven in Maine. Colonies censused in the extreme south and north of the study area were lower in number of species and number of adults than those in the intermediate area. More...
Authors
Thomas W. Custer, Ronald G. Osborn, W.F. Stout
Nest site and colony characteristics of wading birds in selected Atlantic Coast colonies Nest site and colony characteristics of wading birds in selected Atlantic Coast colonies
Nests of 5 species of wading birds were identified and marked during the breeding season at 6 locations from Massachusetts to North Carolina. At the end of the breeding season 12 characteristics of nest-site location were measured. Nest locations were mapped to examine dispersion and nearest neighbor relationships. Multivariate analyses were used to describe and compare sites and species...
Authors
Donald L. Beaver, Ronald G. Osborn, Thomas W. Custer
Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254 Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254
A dietary dosage of 25 ppm Aroclor 1254 fed to nine-month-old mallards Anas platyrhynchos for at least a month before egg-laying had no detrimental effect on reproductive success or nest attentiveness when hens were allowed to incubate their own eggs. The treatment caused no effect on number of hens laying, date of first egg laid or clutch size. Fertility of eggs was greater among...
Authors
T. W. Custer, G. H. Heinz
New black-crowned night heron colony found in Rhode Island New black-crowned night heron colony found in Rhode Island
No abstract available.
Authors
T. W. Custer, J.E. Myers, C.C. Allin
Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254 Reproductive success and nest attentiveness of mallard ducks fed Aroclor 1254
A dietary dosage of 25 ppm Aroclor 1254 fed to nine-month-old mallards Anas platyrhynchos for at least a month before egg-laying had no detrimental effect on reproductive success or nest attentiveness when hens were allowed to incubate their own eggs. The treatment caused no effect on number of hens laying, date of first egg laid or clutch size. Fertility of eggs was greater among...
Authors
T. W. Custer, G. H. Heinz
Response of captive, breeding mallards to oiled water Response of captive, breeding mallards to oiled water
No abstract available.
Authors
T. W. Custer, P.H. Albers