Publications
This is a list of publications written by Patuxent employees since Patuxent opened in 1939. To search for Patuxent's publications by author or title, please click below to go to the USGS Publication Warehouse.
Filter Total Items: 8128
Measurements of toxicity and critical stages of development Measurements of toxicity and critical stages of development
No abstract available.
Authors
D. J. Hoffman
Measuring and monitoring biological diversity: Standard methods for amphibians Measuring and monitoring biological diversity: Standard methods for amphibians
Measuring and Monitoring Biological Diversity is the first book to provide comprehensive coverage of standard methods for biodiversity sampling of amphibians, with information on analyzing and using data that will interest biologists in general. In this manual, nearly fifty herpetologists recommend ten standard sampling procedures for measuring and monitoring amphibian and many other...
Should we terminate an 'artificial,' tree-nesting raptor population in Arizona? Should we terminate an 'artificial,' tree-nesting raptor population in Arizona?
The Altar Valley in southcentral Arizona was once a iallgrass prairie. Overgrazing prevented fire and spread mesquite, allowing the area, now a savanna, to be heavily used by tree-nesting raptors in summer and heavily hunted by perch-hunting raptors in winter. The breeding raptor community (over 150 pairs) consists primarily of red-tailed hawks (Buteo jamaicensis), great horned owls...
Authors
D. H. Ellis, D.G. Smith, F.B.P. Trahan
Nutritional restriction and acid-base balance in white-tailed deer Nutritional restriction and acid-base balance in white-tailed deer
We examined the effect of progressive nutritional restriction on acid-base balance in seven captive, adult white-tailed deer (Odocoileus virginianus) from 4 February to 5 May 1988 in north central Minnesota (USA). Metabolic acidosis was indicated by low mean blood pH (7.25 to 7.33) in deer throughout the study. Mean urinary pH values declined (P = 0.020) from a mean (±SE) baseline of 8.3...
Authors
G. D. DelGiudice, L.D. Mech, U.S. Seal
The 1992 and 1993 summary of the North American Breeding Bird Survey The 1992 and 1993 summary of the North American Breeding Bird Survey
Using data from the North American Breeding Bird Survey (BBS), continental and regional changes in bird populations were estimated for the 2-year periods of 1991-1992 and 1992-1993. These 2-year changes were placed in the context of population trends since 1966. During 1991-1992, 62% of all species exhibited positive continental trend estimates. For species showing significant population...
Authors
B.G. Peterjohn, J.R. Sauer, W.A. Link
Communal roosting and foraging behavior of staging sandhill cranes Communal roosting and foraging behavior of staging sandhill cranes
Each spring more than 300,000 Sandhill Cranes (Grus canadensis) roost communally at night in river channels in the Platte River Valley of Nebraska and disperse at dawn to forage in agricultural fields. Cranes with central roosts had activity ranges double the size of those with peripheral roosts; 42% of the birds changed activity ranges prior to the onset of migration. Minimum daily...
Authors
D. W. Sparling, Gary L. Krapu
Demography and movements of the omao (Myadestes obscurus) Demography and movements of the omao (Myadestes obscurus)
Density, age-specific survival, timing of breeding and molting, and movements of the Omao or Hawaiian Thrush (Myadestes obscurus) were studied at four sites on the island of Hawaii. Mean monthly density (birds/ha) was 3.23 +- 0.57, 1.07 +- 0.33, 3.23 +- 0. 16, and 3.74 +- 0.36 at Kau Forest, Hamakua. Keauhou Ranch, and Kilauea Forest study areas, respectively. Annual survival of juvenile...
Authors
C.J. Ralph, S.G. Fancy
Day users in the backcountry: The neglected park visitor Day users in the backcountry: The neglected park visitor
No abstract available.
Authors
J.W. Roggenbuck, J. L. Marion, R.E. Manning
Observer differences in the North American Breeding Bird Survey Observer differences in the North American Breeding Bird Survey
Because count data collected in many bird surveys are only an index to population size, factors that can influence the counts must be identified and incorporated into analyses. Observer quality is often ignored in analyses of population changes from survey data, but observers differ in methods and capabilities and, hence, tend to count different numbers of birds. We assess the...
Authors
J.R. Sauer, B.G. Peterjohn, W.A. Link
Demography and movements of the endangered akepa and Hawaii creeper Demography and movements of the endangered akepa and Hawaii creeper
We studied populations of the endangered Akepa (Loxops coccineus coccineus) and Hawaii Creeper (Oreomystis mana) at four sites on the island of Hawaii. Mean monthly density (? SL) of Akepa was 5.74 t 0.87, 1.3? 0.41, 0.96 -? 0.13, and 0.76 ? 0.12 Akepa/ha at Kau Forest, Hamakua, Keauhou Ranch, and Kilauea Forest study areas, respectively. Hawaii Creepers were found at densities of 1.68...
Authors
C.J. Ralph, S.G. Fancy
Timing of breeding and molting in six species of Hawaiian honeycreepers Timing of breeding and molting in six species of Hawaiian honeycreepers
The timing of breeding and molting was studied in six species of Hawaiian honeycreepers with differing food habits on the Island of Hawaii. The availability of nectar was highly seasonal, whereas insect abundance was relatively constant throughout the year. All six species of honeycreeper had extended breeding and molting periods with peak breeding between April and July and peak molting...
Authors
C.J. Ralph, S.G. Fancy