Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41772
Demographic features of a lapland longspur population near Barrow, Alaska
Breeding density, clutch size, hatching and fledging success, and survival of adult Lapland Longspurs (Calcarius lapponicus) were monitored over a 7-year period near the Naval Arctic Research Laboratory, Barrow, Alaska. Nesting begins as soon as the tundra starts to clear of snow and appears to be timed so that the young of the year reach independence before the end of adult insect emergence. Arth
Authors
Thomas W. Custer, Frank A. Pitelka
Weather influences on nocturnal bird mortality at a North Dakota tower
Abstract has not been submitted
Authors
M.L. Avery, P. F. Springer, J.F. Cassel
Post-breeding activities of mallards and wood ducks in north-central Minnesota
We used radio telemetry to monitor the post-breeding activities of 129 mallards (Anas platyrhynchos) and 118 wood ducks (Aix sponsa) on a 932-km2 area in north-central Minnesota from 1968 to 1974. Upon completion of breeding activities and before the flightless period, all mallard drakes departed the area; this exodus peaked during early June. Of the non-brood hens 8 of 23 remained on the area, wh
Authors
D.S. Gilmer, R.E. Kirby, I. J. Ball, J. H. Riechmann
Pintail reproduction hampered by snowfall and agriculture
Abstract has not been submitted
Authors
G.L. Krapu
Nesting by ferruginous hawks and other raptors on high voltage powerline towers
Abstract has not been submitted
Authors
D.S. Gilmer, J.M. Wiehe
Egg movement by a female gadwall between nest bowls
Abstract has not been submitted
Authors
R.F. Johnson, L.M. Kirsch
Duck nesting in intensively farmed areas of North Dakota
A study to determine the major factors limiting duck nesting and production on intensively farmed areas in eastern North Dakota was conducted from 1969 through 1974. A total of 186 duck nests was found during searches on 6,018 ha of upland. Nest density per km2 for 5 major habitat types was 20.2 in untilled upland, 3.7 in standing grain stubble, 1.6 in mulched grain stubble, 1.2 in summer fallow,
Authors
K.F. Higgins
Yellow-crowned night herons sighted in North Dakota
Abstract has not been submitted
Authors
Dennis G. Jorde, G.L. Krapu, R.K. Green
Foods of juvenile, brood hen, and post-breeding pintails in North Dakota
No abstract available.
Authors
G.L. Krapu, G.A. Swanson
Use of natural basin wetlands by breeding waterfowl in North Dakota
Use of basin wetlands by breeding populations of 12 species of waterfowl was investigated in 1965 and during 1967-69 throughout the prairie pothole region of North Dakota. Data were obtained primarily by random sampling techniques. Of the total population occupying natural basin wetlands 55 percent occupied seasonal and 36 percent occupied semipermanent wetlands. Seasonal wetlands contained 60 per
Authors
H.A. Kantrud, R. E. Stewart