Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

185258 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 3771, results 94251 - 94275

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Comparative demography of sea otter populations
James A. Estes, Daniel F. Doak, James L. Bodkin, Ronald J. Jameson, Daniel H. Monson, Jon Watt, M. Tim Tinker
1996, Endangered Species UPDATE (13) 11-13
Population trends are poorly documented and demographic information is typically lacking for many carnivorous mammals. The sea otter (Enhydru lutris) has a well known history of decline and recovery, and while many other species have declined as precipitously, few have recovered so spectacularly. Generally speaking, northern populations (remnants within the...
Habitat selection and productivity of least terns on the lower Platte River, Nebraska
Eileen M. Kirsch
1996, Book, Wildlife Monographs
Least terns (Sterna antillarum) were studied on the lower Platte River, Nebraska, where this endangered population nests on natural sandbar habitat and on sandpit sites created by gravel dredging adjacent to the river. Theoretically terns should select habitats according to habitat suitability. However, the introduction of sandpits and conversion of...
Influence of radio transmitters on prairie falcons (Falco mexicanus)
M.S. Vekasy, J.M. Marzluff, Michael N. Kochert, Robert N. Lehman, Karen Steenhof
1996, Journal of Field Ornithology (67) 680-690
We examined the effects of backpack radio transmitters on Prairie Falcon (Falco mexicanus) reproduction (percentage of occupied territories producing young and number of nestlings produced) over four years. In addition, we observed falcon aeries during brood-rearing to determine attendance at the nest and in the territory, prey delivery rates, and...
Crested wheatgrass-cheatgrass seedling competition in a mixed-density design
Mark G. Francis, David A. Pyke
1996, Journal of Range Management (49) 432-438
Plant competition experiments have historically used designs that are difficult to interpret due to confounding problems. Recently, designs based on a 'response function' approach have been proposed and tested in various plant mixture settings. For this study, 3 species were used that are important in current revegetation practices in the...
Control of external Aeromonas salmonicida: topical disinfection of salmonids with Chloramine-T
R. C. Cipriano, L.A. Ford, C. E. Starliper, J.D. Teska, J.T. Nelson, B.N. Jensen
1996, Journal of Aquatic Animal Health (8) 52-57
Brook trout Salvelinus fontinalis were treated with single 60-min static baths of 250 mg formalin/L, 3% NaCl, and 15 mg Chloramine-T/L to evaluate the efficacy of these compounds against external infections of Aeromonas salmonicida. Prevalence of A. salmonicida was significantly lower in brook trout treated with Chloramine-T than among those...
Geochemical characteristics and origin of the Lebowa Granite Suite, Bushveld Complex
M. Hill, F. Barker, D. Hunter, R. Knight
1996, International Geology Review (38) 195-227
The ∼ 2052-Ma Lebowa Granite Suite (LGS) represents the culminating phase of an Early Proterozoic magmatic cycle in the Central Transvaal area of the Kaapvaal Province. Following extrusion of at least 200,000 km3 of intermediate to acid volcanics (Rooiberg Felsite), mafic and ultramafic magmas intruded at 2065 Ma to...
Zooplankton assemblages in Crater Lake, Oregon, USA
Gary L. Larson, C. D. McIntire, R.E. Truitt, M.W. Buktenica, E. Karnaugh-Thomas
1996, Lake and Reservoir Management (12) 281-297
The zooplankton community in Crater Lake was comprised of 11 rotifer species and 2 species of cladocerans. Most zooplankton taxa were distributed in winter and spring from the lake surface to a depth of about 200 m, the maximum depth of mixing of lake waters by wind energy. The distribution...
Palaeozoic nonmarine firmground ichnofaunas: evidence from the permian of the Paganzo basin
L.A. Buatois, M.G. Mangano, F.G. Acenolaza
1996, Ameghiniana (33) 265-270
Meniscate striated traces are recorded from Permian fluvial deposits of the La Colina Formation (Paganzo Group) at Los Colorados de Patqui??a (La Rioja Province). These structures are characterized by their remarkable well developed striations, oblique to the margins of unbranched and unwalled traces. Taxonomic assessment of these structures must await...
Movement patterns of wintering lesser scaup in Grand Calumet River - Indiana Harbor Canal, Indiana
Christine M. Custer, T. W. Custer, D. W. Sparks, Randy K. Hines, C.O. Kochanny
1996, Journal of Great Lakes Research (22) 95-99
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...
Using remote sensing and GIS techniques to estimate discharge and recharge. fluxes for the Death Valley regional groundwater flow system, USA
F. A. D’Agnese, C.C. Faunt, Turner A. Keith
1996, IAHS-AISH Publication 503-511
The recharge and discharge components of the Death Valley regional groundwater flow system were defined by remote sensing and GIS techniques that integrated disparate data types to develop a spatially complex representation of near-surface hydrological processes. Image classification methods were applied to multispectral satellite data to produce a vegetation map....
Effects of zebra mussel (Dreissena polymorpha) density on the survival and growth of juvenile fathead minnows (Pimephales promelas): Implications for North American river fishes
Cecil A. Jennings
1996, Hydrobiologia (324) 157-161
I used replicated 37.8 1 aquaria in a factorial design (four densities of zebra mussel, Dreissena polymorpha; two hydrologic regimes) to determine if the survival or growth of juvenile fathead minnows (Pimephales promelas) was affected by the density of zebra mussel or by the retention time of...
Microenvironments and microscale productivity of cyanobacterial desert crusts
F. Garcia-Pichel, Jayne Belnap
1996, Journal of Phycology (32) 774-782
We used microsensors to characterize physicochemical microenvironments and photosynthesis occurring immediately after water saturation in two desert soil crusts from southeastern Utah, which were formed by the cyanobacteria Microcoleus vaginatus Gomont, Nostoc spp., and Scytonema sp. The light fields within the crusts presented steep vertical gradients in magnitude and spectral...
Shorebird use of South Carolina managed and natural coastal wetlands
Louise M. Weber, Susan M. Haig
1996, Journal of Wildlife Management (60) 73-82
While many migrating and wintering shorebird (Charadriiformes) species face declines in quality and quantity of natural stopover sites, diked wetlands managed for shorebirds may provide supplemental habitat. We describe an integrative shorebird-waterfowl management strategy used at Tom Yawkey Wildlife Center on South Island, South Carolina, during 3 winter-spring seasons (1991-93)....
The vascular plant flora of Hopewell Culture National Historical Park. Ross County, Ohio
J. P. Bennett, J.E. Course
1996, Rhodora (98) 146-167
HopewellCulture National Historical Park, a unit of the United States National Park Service located in Ross County in south central Ohio, was created to restore, protect, and interpret the legacy of the mound building Hopewell prehistoric peoples. The vascular flora of the park had been estimated to be only 20%...
Geographical distributions of lake trout strains stocked in Lake Ontario
Joseph H. Elrod, Robert O’Gorman, Clifford P. Schneider, Ted Schaner
1996, Journal of Great Lakes Research (22) 871-883
Geographical distributions of lake trout (Salvelinus namaycush) stocked at seven locations in U.S. waters and at four locations in Canadian waters of Lake Ontario were determined from fish caught with gill nets in September in 17 areas of U.S. waters and...