Christine Custer
Christine Custer
Science and Products
Filter Total Items: 88
Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA
Green Bay, Wisconsin is contaminated with polychlorinated biphenyls (PCBs) however, whether these contaminants affect reproduction in insectivorous birds is unknown. Tree Swallows, Tachycineta bicolor, are secondary cavity nesters that will nest in boxes and tolerate handling. Because Tree Swallows are aquatic insectivores, residues in their tissues are primarily indicative of contaminants in se
Authors
Christine M. Custer, T. W. Custer, P. David Allen, K. L. Stromborg, M. J. Melancon
Reproduction and environmental contamination in tree swallows nesting in the Fox River drainage and Green Bay, Wisconsin, USA
Concentration, accumulation, and effects of polychlorinated biphenyls (PCBs) o nreproduction in tree swallows (Tachycineta bicolor) were studied at four sites in the Fox River drainage and in Green Bay, Lake Michigan, Wisconsin, USA, in 1994 and 1995. Total PCBs in eggs and newly hatched young (mean = 3.01 μg/g wet weight, years and sites combined) and 12-d-old nestlings (mean = 2.34 μg/g wet weig
Authors
Christine M. Custer, Thomas W. Custer, P. David Allen, Kenneth L. Stromborg, Mark J. Melancon
Lesser scaup (Aythya affinis)
No abstract available.
Authors
J. E. Austin, Christine M. Custer, A. D. Afton
Decline in greater and lesser scaup populations: issues, hypotheses, and research directions. Summary report of the Scaup Workshop 9-10 September 1998, Jamestown, ND
No abstract available.
Authors
J. E. Austin, A. D. Afton, M.G. Anderson, R. G. Clark, Christine M. Custer, J.S. Lawrence, B. Pollard, J.K. Ringelman
Lesser scaup (Aythya affinis)
Abstract not submitted to date
Authors
J. E. Austin, Christine M. Custer, A. D. Afton
Effects of contaminants on Double-crested Cormorant reproduction in Green Bay, Wisconsin, USA
In 1994 and 1995, Double-crested Cormorants Phalacrocorax auritus were monitored from egg-laying through 12 days of age at Cat Island, Green Bay, Wisconsin, USA. Sample eggs at hatching were analysed for organochlorines (including total PCBs, PCB congeners, and DDE), hepatic microsomal ethoxyresorufin-O-dealkylase (EROD) activity in livers of embryos, and eggshell thickness. The number of eggs p
Authors
T. W. Custer, Christine M. Custer, K. L. Stromborg, M. J. Melancon
Occurrence of zebra mussels in near-shore areas of western Lake Erie
We measured biomass, percent coverage, and length-frequency of zebra mussels in near-shore areas of western Lake Erie between 16 September and 10 November 1993 as part of a larger study on the ecological relationship between diving ducks and zebra mussels. Wet weight biomass of zebra mussels, determined by SCUBA diving, ranged from 0 to 3,611 g/m2 and averaged ( ± 1 SE) 1,270 ± 380 g/m2 (n = 11).
Authors
Christine M. Custer, T. W. Custer
Distribution of organochlorine contaminants in double-crested cormorant eggs and sibling embryos
Double-crested cormorant (Phalacrocorax auritus) fresh eggs and sibling embryos at pipping were collected from a polychlorinated biphenyl (PCB)-contaminated colony in Green Bay, Wisconsin, USA. Egg contents were analyzed for organochlorine (OC) contaminants, including 15 arylhydrocarbon-active PCB congeners. In order to determine the significance of tissue removal on the subsequent estimate of con
Authors
T. W. Custer, Christine M. Custer, K. L. Stromborg
Migration chronology and distribution of redheads on the lower Laguna Madre, Texas
An estimated 80% of redheads (Aythya americana) winter on the Laguna Madre of southern Texas and Mexico. Because there have been profound changes in the Laguna Madre over the past three decades and the area is facing increasing industrial and recreational development, we studied the winter distribution and habitat requirements of redheads during two winters (1987-1988 and 1988-1989) on the Lower L
Authors
Christine M. Custer, T. W. Custer, P.J. Zwank
Radio telemetry documents 24-hour feeding activity of wintering lesser scaup
We used radio telemetry to record 198 h of feeding behavior of five Lesser Scaup (Aythya affinis) on the Indiana Harbor Canal in northwestern Indiana during January and February 1994. Lesser Scaup fed for short periods of time intermittently during each 24-h period. Lesser Scaup fed a total of 96 min during the day and 226 min during the night. They fed more between sunset and midnight (31.9% of t
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks
Movement patterns of wintering lesser scaup in Grand Calumet River - Indiana Harbor Canal, Indiana
Lesser scaup (Aythya affinis) winter in the Grand Calumet River—Indiana Harbor Canal (GCR-IHC) drainage into southern Lake Michigan, a polluted oasis in the highly urban and industrial corridor of northern Illinois and Indiana. The GCR-IHC is an important wintering area for lesser scaup in northwestern Indiana, especially after Lake Michigan freezes, because of the lack of other wildlife habitat i
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks, Randy K. Hines, C.O. Kochanny
Nest initiation and clutch size of great blue herons on the Mississippi River in relation to the 1993 flood
Great Blue Heron (Ardea herodias) eggs were collected from ten colonies between Clinton, Iowa and Royalton, Minnesota on the Mississippi River in 1993, a year of record floods in the midwestern United States. In the live southernmost colonies where record flooding occurred, Great Blue Herons initiated nesting two weeks later than herons nesting in the five northernmost colonies that were less affe
Authors
T. W. Custer, R. K. Hines, Christine M. Custer
Science and Products
Filter Total Items: 88
Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA
Green Bay, Wisconsin is contaminated with polychlorinated biphenyls (PCBs) however, whether these contaminants affect reproduction in insectivorous birds is unknown. Tree Swallows, Tachycineta bicolor, are secondary cavity nesters that will nest in boxes and tolerate handling. Because Tree Swallows are aquatic insectivores, residues in their tissues are primarily indicative of contaminants in se
Authors
Christine M. Custer, T. W. Custer, P. David Allen, K. L. Stromborg, M. J. Melancon
Reproduction and environmental contamination in tree swallows nesting in the Fox River drainage and Green Bay, Wisconsin, USA
Concentration, accumulation, and effects of polychlorinated biphenyls (PCBs) o nreproduction in tree swallows (Tachycineta bicolor) were studied at four sites in the Fox River drainage and in Green Bay, Lake Michigan, Wisconsin, USA, in 1994 and 1995. Total PCBs in eggs and newly hatched young (mean = 3.01 μg/g wet weight, years and sites combined) and 12-d-old nestlings (mean = 2.34 μg/g wet weig
Authors
Christine M. Custer, Thomas W. Custer, P. David Allen, Kenneth L. Stromborg, Mark J. Melancon
Lesser scaup (Aythya affinis)
No abstract available.
Authors
J. E. Austin, Christine M. Custer, A. D. Afton
Decline in greater and lesser scaup populations: issues, hypotheses, and research directions. Summary report of the Scaup Workshop 9-10 September 1998, Jamestown, ND
No abstract available.
Authors
J. E. Austin, A. D. Afton, M.G. Anderson, R. G. Clark, Christine M. Custer, J.S. Lawrence, B. Pollard, J.K. Ringelman
Lesser scaup (Aythya affinis)
Abstract not submitted to date
Authors
J. E. Austin, Christine M. Custer, A. D. Afton
Effects of contaminants on Double-crested Cormorant reproduction in Green Bay, Wisconsin, USA
In 1994 and 1995, Double-crested Cormorants Phalacrocorax auritus were monitored from egg-laying through 12 days of age at Cat Island, Green Bay, Wisconsin, USA. Sample eggs at hatching were analysed for organochlorines (including total PCBs, PCB congeners, and DDE), hepatic microsomal ethoxyresorufin-O-dealkylase (EROD) activity in livers of embryos, and eggshell thickness. The number of eggs p
Authors
T. W. Custer, Christine M. Custer, K. L. Stromborg, M. J. Melancon
Occurrence of zebra mussels in near-shore areas of western Lake Erie
We measured biomass, percent coverage, and length-frequency of zebra mussels in near-shore areas of western Lake Erie between 16 September and 10 November 1993 as part of a larger study on the ecological relationship between diving ducks and zebra mussels. Wet weight biomass of zebra mussels, determined by SCUBA diving, ranged from 0 to 3,611 g/m2 and averaged ( ± 1 SE) 1,270 ± 380 g/m2 (n = 11).
Authors
Christine M. Custer, T. W. Custer
Distribution of organochlorine contaminants in double-crested cormorant eggs and sibling embryos
Double-crested cormorant (Phalacrocorax auritus) fresh eggs and sibling embryos at pipping were collected from a polychlorinated biphenyl (PCB)-contaminated colony in Green Bay, Wisconsin, USA. Egg contents were analyzed for organochlorine (OC) contaminants, including 15 arylhydrocarbon-active PCB congeners. In order to determine the significance of tissue removal on the subsequent estimate of con
Authors
T. W. Custer, Christine M. Custer, K. L. Stromborg
Migration chronology and distribution of redheads on the lower Laguna Madre, Texas
An estimated 80% of redheads (Aythya americana) winter on the Laguna Madre of southern Texas and Mexico. Because there have been profound changes in the Laguna Madre over the past three decades and the area is facing increasing industrial and recreational development, we studied the winter distribution and habitat requirements of redheads during two winters (1987-1988 and 1988-1989) on the Lower L
Authors
Christine M. Custer, T. W. Custer, P.J. Zwank
Radio telemetry documents 24-hour feeding activity of wintering lesser scaup
We used radio telemetry to record 198 h of feeding behavior of five Lesser Scaup (Aythya affinis) on the Indiana Harbor Canal in northwestern Indiana during January and February 1994. Lesser Scaup fed for short periods of time intermittently during each 24-h period. Lesser Scaup fed a total of 96 min during the day and 226 min during the night. They fed more between sunset and midnight (31.9% of t
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks
Movement patterns of wintering lesser scaup in Grand Calumet River - Indiana Harbor Canal, Indiana
Lesser scaup (Aythya affinis) winter in the Grand Calumet River—Indiana Harbor Canal (GCR-IHC) drainage into southern Lake Michigan, a polluted oasis in the highly urban and industrial corridor of northern Illinois and Indiana. The GCR-IHC is an important wintering area for lesser scaup in northwestern Indiana, especially after Lake Michigan freezes, because of the lack of other wildlife habitat i
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks, Randy K. Hines, C.O. Kochanny
Nest initiation and clutch size of great blue herons on the Mississippi River in relation to the 1993 flood
Great Blue Heron (Ardea herodias) eggs were collected from ten colonies between Clinton, Iowa and Royalton, Minnesota on the Mississippi River in 1993, a year of record floods in the midwestern United States. In the live southernmost colonies where record flooding occurred, Great Blue Herons initiated nesting two weeks later than herons nesting in the five northernmost colonies that were less affe
Authors
T. W. Custer, R. K. Hines, Christine M. Custer