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Page 4137, results 103401 - 103425

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Black duck population units as determined by patterns of band recovery
G.W. Pendleton, J.R. Sauer
D.R. McCullough, R.H. Barrett, editor(s)
1992, Book chapter, Wildlife 2001: Populations.
To estimate regional survival and band recovery rates for waterfowl populations, banding sites must be grouped for data analysis. We group American black duck banding sites using cluster analysis of pairwise comparisons of the distributions of band recoveries. We propose 6 population units, substantially fewer than the 27 black duck...
Why didn't we plan ahead?
C.S. Robbins
1992, Book chapter, Proceedings of the Fourth Breeding Bird Atlas Conference, September 13-15, 1991
Foraging ecology and nutrition
Gary L. Krapu, K. J. Reinecke
B.D.J. Batt, A. D. Afton, M.G. Anderson, C.D. Ankney, Douglas H. Johnson, J.A. Kadlec, Gary L. Krapu, editor(s)
1992, Book chapter, Ecology and Management of Breeding Waterfowl
Population recovery of the Whooping Crane with emphasis on reintroduction efforts: Past and future
D. H. Ellis, J. C. Lewis, G.F. Gee, D.G. Smith
1992, Book chapter, Proceedings of the Sixth North American Crane Workshop.
The U.S. Fish and Wildlife Service (USFWS) began building a captive whooping crane (Grus americana) colony at Patuxent Wildlife Research Center (Patuxent), Maryland, in 1966. From 1976 to 1984, 73 eggs from this colony and 216 eggs from Wood Buffalo National Park (Wood Buffalo), Canada, nests were placed in sandhill...
Comparison of neotropical migrant landbird populations wintering in tropical forest, isolated forest fragments, and agricultural habitats
C.S. Robbins, B.A. Dowell, D.K. Dawson, J.A. Colon, R. Estrada, A. Sutton, R. Sutton, Dieter Weyer
John M. Hagan III, David W. Johnston, editor(s)
1992, Book chapter, Ecology and Conservation of Neotropical Migrant Landbirds
Neotropical migrant bird populations were sampled at 76 sites in seven countries by using mist nets and point counts during a six-winter study. Populations in major agricultural habitats were compared with those in extensive forest and isolated forest fragments. Certain Neotropical migrants, such as the Northern Parula, American Redstart, and...
Karyotype and identification of sex in two endangered crane species
C. Goodpasture, G. Seluja, G. Gee
Don A. Wood, editor(s)
1992, Book chapter, Proceedings of the 1988 North American Crane Workshop
A laboratory procedure for sex identification of monomorphic birds was developed using modern cytological methods of detecting chromosome abnormalities in human amniotic fluid samples. A pin feather is taken from a pre-fledging bird for tissue culture and karyotype analysis. Through this method, the sex was identified and the karyotype described...
The study of relatedness and genetic diversity in cranes
G.F. Gee, H.C. Dessauer, J. Longmire, W.E. Briles, R.C. Simon
Don A. Wood, editor(s)
1992, Book chapter, Proceedings of the 1988 North American Crane Workshop
The U.S. Fish and Wildlife Service (Service) is responsible for recovery of endangered species in the wild and, when necessary, maintenance in captivity. These programs provide an immediate measure of insurance against extinction. A prerequisite inherent in all of these programs is the preservation of enough genetic diversity to maintain...
Geographic patterns in population trends of neotropical migrants in North America
J.R. Sauer, Sam Droege
John M. Hagan III, D.W. Johnston, editor(s)
1992, Book chapter, Ecology and Conservation of Neotropical Migrant Landbirds
We use the route-regression method to estimate the population trends of 100 species of Neotropical migrants using data from the North American Breeding Bird Survey (BBS). We examine long-term (1966-1988) and recent (1978-1988) trends. In the long-term, more species of Neotropical migrants were increasing than were decreasing in...
A comparison of the nesting success of mourning doves and American robins in conventionally managed and organic orchards
K.M. Fluetsch
1992, Book
A comparative study was undertaken to document more closely the effects of operational pesticide use on non-target avian species. Mourning Dove (Zenaida macroura) and American Robin (Turdus migratorius) nesting activity was monitored in three organic and three conventional orchards during two breeding seasons. Surveys were conducted to characterize...
Forum on land use and land Cover: Summary report
U.S. Environmental Protection Agency, Water Resources Division, U.S. Geological Survey
1992, Book
This report includes the agenda and abstracts of presentations from the Forum on Land Use and Land Cover Data, cohosted by the U. S. Geological Survey (USGS) and the U.S. Environmental Protection Agency (USEPA), February 25-27,1992 at the USGS National Center in Reston, Virginia. The Forum was conducted under the...
Increasing rates of atmospheric mercury deposition in midcontinental North America
Edward B. Swain, Daniel R. Engstrom, Mark E. Brigham, Thomas A. Henning, P.L. Brezonik
1992, Science (257) 784-787
Mercury contamination of remote lakes has been attributed to increasing deposition of atmospheric mercury, yet historic deposition rates and inputs from terrestrial sources are essentially unknown. Sediments of seven headwater lakes in Minnesota and Wisconsin were used to reconstruct regional modern and preindustrial deposition rates of mercury. Whole-basin mercury fluxes,...