Thomas Custer (Former Employee)
Science and Products
Filter Total Items: 185
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 than 90%
Authors
Thomas W. Custer, Ronald G. Osborn, W.F. Stout
Response of captive, breeding mallards to oiled water
No abstract available.
Authors
T. W. Custer, P.H. Albers
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 Aroclor-treated
Authors
T. W. Custer, G. H. Heinz
New black-crowned night heron colony found in Rhode Island
No abstract available.
Authors
T. W. Custer, J.E. Myers, C.C. Allin
Nest-size 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.....We fo
Authors
D.L. Beaver, R. G. Osborn, T. W. Custer
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 Aroclor-treated
Authors
T. W. Custer, G. H. Heinz
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. We found
Authors
Donald L. Beaver, Ronald G. Osborn, Thomas W. Custer
Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976
No abstract available.
Authors
R. G. Osborn, T. W. Custer
Feeding-site description of three heron species near Beaufort, North Carolina
No abstract available.
Authors
T. W. Custer, R. G. Osborn
Seasonal trends in summer diet of the lapland longspur near Barrow Alaska USA
Contents of lapland longspur [Calcarius lapponicus] stomachs and esophagi were sampled near Barrow, Alaska [USA], from May-Aug. in 1969, 1971, 1972 and 1973. Data from stomach contents were corrected for differential digestion of prey items. Longspurs shifted seasonally from larval to adult arthropods and back to larvae, responding to changes in the abundance of these prey items. Seeds were a vita
Authors
T. W. Custer, F.A. Pitelka
Herons and their allies: atlas of Atlantic coast colonies, 1975 and 1976
No abstract available.
Authors
Ronald G. Osborn, Thomas W. Custer
Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina
Nine species of herons, egrets, and ibises were followed by airplane from a nesting colony near Beaufort, North Carolina to their feeding sites. Except for Cattle Egrets, which flew exclusively to fields and dumps, the birds flew mainly to saltmarsh habitat. The selection of feeding habitats by Great Egrets and Louisiana Herons was directly related to tidal depth. The Great Egret was the only spec
Authors
Thomas W. Custer, Ronald G. Osborn
Science and Products
Filter Total Items: 185
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 than 90%
Authors
Thomas W. Custer, Ronald G. Osborn, W.F. Stout
Response of captive, breeding mallards to oiled water
No abstract available.
Authors
T. W. Custer, P.H. Albers
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 Aroclor-treated
Authors
T. W. Custer, G. H. Heinz
New black-crowned night heron colony found in Rhode Island
No abstract available.
Authors
T. W. Custer, J.E. Myers, C.C. Allin
Nest-size 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.....We fo
Authors
D.L. Beaver, R. G. Osborn, T. W. Custer
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 Aroclor-treated
Authors
T. W. Custer, G. H. Heinz
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. We found
Authors
Donald L. Beaver, Ronald G. Osborn, Thomas W. Custer
Herons and their allies: Atlas of Atlantic Coast colonies, 1975 and 1976
No abstract available.
Authors
R. G. Osborn, T. W. Custer
Feeding-site description of three heron species near Beaufort, North Carolina
No abstract available.
Authors
T. W. Custer, R. G. Osborn
Seasonal trends in summer diet of the lapland longspur near Barrow Alaska USA
Contents of lapland longspur [Calcarius lapponicus] stomachs and esophagi were sampled near Barrow, Alaska [USA], from May-Aug. in 1969, 1971, 1972 and 1973. Data from stomach contents were corrected for differential digestion of prey items. Longspurs shifted seasonally from larval to adult arthropods and back to larvae, responding to changes in the abundance of these prey items. Seeds were a vita
Authors
T. W. Custer, F.A. Pitelka
Herons and their allies: atlas of Atlantic coast colonies, 1975 and 1976
No abstract available.
Authors
Ronald G. Osborn, Thomas W. Custer
Feeding habitat use by colonially-breeding herons, egrets, and ibises in North Carolina
Nine species of herons, egrets, and ibises were followed by airplane from a nesting colony near Beaufort, North Carolina to their feeding sites. Except for Cattle Egrets, which flew exclusively to fields and dumps, the birds flew mainly to saltmarsh habitat. The selection of feeding habitats by Great Egrets and Louisiana Herons was directly related to tidal depth. The Great Egret was the only spec
Authors
Thomas W. Custer, Ronald G. Osborn