Publications
Filter Total Items: 2088
Monitoring species richness and abundance of shorebirds in the western Great Basin Monitoring species richness and abundance of shorebirds in the western Great Basin
Broad-scale avian surveys have been attempted within North America with mixed results. Arid regions, such as the Great Basin, are often poorly sampled because of the vastness of the region, inaccessibility of sites, and few ornithologists. In addition, extreme variability in wetland habitat conditions present special problems for conducting censuses of species inhabiting these areas. We...
Authors
Nils Warnock, Susan M. Haig, Lewis W. Oring
Status of the white-faced ibis: Breeding colony dynamics of the Great Basin population, 1985-1997 Status of the white-faced ibis: Breeding colony dynamics of the Great Basin population, 1985-1997
The status of the White-faced Ibis (Plegadis chihi) in the Great Basin is of concern because of its small population size and the limited and dynamic nature of its breeding habitat. We analyzed existing annual survey data for the White-faced Ibis breeding in the Great Basin and surrounding area for 1985-1997. Methods varied among colonies and included flight-line counts and fixed-wing...
Authors
Susan L. Earnst, L. Neel, G.L. Ivey, T. Zimmerman
Declining ring-necked pheasants in the Klamath Basin, California: I. Insecticide exposure Declining ring-necked pheasants in the Klamath Basin, California: I. Insecticide exposure
A study of organophosphorus (OP) insecticide exposure was conducted on a declining population of ring-necked pheasants (Phasianus colchicus) associated with agricultural lands at Tule Lake National Wildlife Refuge (TLNWR) during the summers of 1990–92. Findings at TLNWR were compared with a nearby pheasant population at Lower Klamath National Wildlife Refuge (LKNWR) not subjected to...
Authors
Robert A. Grove, D. R. Buhler, Charles J. Henny, A. D. Drew
Annual deposition of scute rings in the western pond turtle, Clemmys marmorata Annual deposition of scute rings in the western pond turtle, Clemmys marmorata
No abstract available.
Authors
R. Bruce Bury, David J. Germano
Interaction between introduced trout and larval salamanders (Ambystoma macrodactylum) in high-elevation lakes Interaction between introduced trout and larval salamanders (Ambystoma macrodactylum) in high-elevation lakes
The larval stage of the long-toed salamander (Ambystoma macrodactylum) is the top vertebrate predator in high-elevation fishless lakes in the North Cascades National Park Service Complex, Washington (U.S.A.). Although most of these high-elevation lakes were naturally fishless, trout have been stocked in many of them. We sought to determine the effects of physicochemical factors and...
Authors
T. Tyler, W.J. Liss, L. Ganio, Gary L. Larson, Robert L. Hoffman, E. Deimling, G.A. Lomnicky
Variability of Secchi disk readings in an exceptionally clear and deep caldera lake Variability of Secchi disk readings in an exceptionally clear and deep caldera lake
SUMMARY: The Peromyscus leucopus on a 17-acre study area were live-trapped, marked, and released over a seven-day period. On the three following nights intensive snap-trapping was done on the central acre of the study plot. The animals caught by snap traps in the central acre represented the population of the central acre and several surrounding acres. By the currently accepted methods...
Authors
Gary L. Larson, M.W. Buktenica
KERNELHR: A program for estimating animal home ranges KERNELHR: A program for estimating animal home ranges
Kernel methods are state of the art for estimating animal home-range area and utilization distribution (UD). The KERNELHR program was developed to provide researchers and managers a tool to implement this extremely flexible set of methods with many variants. KERNELHR runs interactively or from the command line on any personal computer (PC) running DOS. KERNELHR provides output of fixed...
Authors
D.E. Seaman, B. Griffith, R. A. Powell
Phytoplankton assemblages in high-elevation lakes in the northern Cascade Mountains, Washington State, USA Phytoplankton assemblages in high-elevation lakes in the northern Cascade Mountains, Washington State, USA
Phytoplankton assemblages in high-elevation lakes of North Cascades National Park Service Complex were studied during the open-water period in 1989. Collectively, 93 taxa were identified in 55 samples from 51 lakes. Based on cell densities, cyanobacteria had the highest relative abundance (36.7 %), followed by chlorophytes (29.8 %), and chrysophytes (19.6 %). Aphanocapsa delicatissima...
Authors
Gary L. Larson, C. D. McIntire, R.E. Truitt, W.J. Liss, Robert L. Hoffman, E. Deimling, G.A. Lomnicky
Assessing relative abundance and reproductive success of shrubsteppe raptors Assessing relative abundance and reproductive success of shrubsteppe raptors
From 1991-1994, we quantified relative abundance and reproductive success of the Ferruginous Hawk (Buteo regalis), Northern Harrier (Circus cyaneus), Burrowing Owl (Speotytoc unicularia), and Short-eared Owl (Asio flammeus) on the shrubsteppe plateaus (benchlands) in and near the Snake River Birds of Prey National Conservation Area in southwestern Idaho. To assess relative abundance, we...
Authors
Robert N. Lehman, L.B. Carpenter, Karen Steenhof, Michael N. Kochert
The role of special angling regulations in management of coastal cutthroat trout The role of special angling regulations in management of coastal cutthroat trout
No abstract available.
Authors
Robert E. Gresswell, R.D. Harding
Surveying and monitoring amphibians using aquatic funnel traps Surveying and monitoring amphibians using aquatic funnel traps
No abstract available.
Authors
M.J. Adams, K.O. Richter, W.P. Leonard