Christine Custer
Christine Custer
Science and Products
Filter Total Items: 93
Migration chronology and distribution of redheads on the lower Laguna Madre, Texas 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...
Authors
Christine M. Custer, T. W. Custer, P.J. Zwank
Occurrence of zebra mussels in near-shore areas of western Lake Erie 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...
Authors
Christine M. Custer, T. W. Custer
Food habits of diving ducks in the Great Lakes after the zebra mussel invasion Food habits of diving ducks in the Great Lakes after the zebra mussel invasion
Zebra mussels (Dreissena polymorpha) invaded the Great Lakes in the mid-1980s and quickly reached high densities. The objective of this study was to determine current consumption of zebra mussels by waterfowl in the Great Lakes region. Feeding Lesser Scaups (Aythya affinis), Greater Scaups (A. marila), Canvasbacks (A. valisineria), Redheads (A. americana), Buffleheads (Bucephala albeola)...
Authors
Christine M. Custer, T. W. Custer
Nest initiation and clutch size of great blue herons on the Mississippi River in relation to the 1993 flood 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...
Authors
T. W. Custer, R. K. Hines, Christine M. Custer
Movement patterns of wintering lesser scaup in Grand Calumet River - Indiana Harbor Canal, Indiana 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...
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks, Randy K. Hines, C.O. Kochanny
Radio telemetry documents 24-hour feeding activity of wintering lesser scaup 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...
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks
Science and Products
Filter Total Items: 93
Migration chronology and distribution of redheads on the lower Laguna Madre, Texas 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...
Authors
Christine M. Custer, T. W. Custer, P.J. Zwank
Occurrence of zebra mussels in near-shore areas of western Lake Erie 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...
Authors
Christine M. Custer, T. W. Custer
Food habits of diving ducks in the Great Lakes after the zebra mussel invasion Food habits of diving ducks in the Great Lakes after the zebra mussel invasion
Zebra mussels (Dreissena polymorpha) invaded the Great Lakes in the mid-1980s and quickly reached high densities. The objective of this study was to determine current consumption of zebra mussels by waterfowl in the Great Lakes region. Feeding Lesser Scaups (Aythya affinis), Greater Scaups (A. marila), Canvasbacks (A. valisineria), Redheads (A. americana), Buffleheads (Bucephala albeola)...
Authors
Christine M. Custer, T. W. Custer
Nest initiation and clutch size of great blue herons on the Mississippi River in relation to the 1993 flood 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...
Authors
T. W. Custer, R. K. Hines, Christine M. Custer
Movement patterns of wintering lesser scaup in Grand Calumet River - Indiana Harbor Canal, Indiana 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...
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks, Randy K. Hines, C.O. Kochanny
Radio telemetry documents 24-hour feeding activity of wintering lesser scaup 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...
Authors
Christine M. Custer, T. W. Custer, D. W. Sparks