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- Grus canadensis (6)
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Articles 1 - 18 of 18
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Serum Chemistry, Blood Gas, And Physiological Measures Of Sandhill Cranes Sedated With Alpha-Chloralose, Richard R. Sim, Barry K. Hartup
Serum Chemistry, Blood Gas, And Physiological Measures Of Sandhill Cranes Sedated With Alpha-Chloralose, Richard R. Sim, Barry K. Hartup
Proceedings of the North American Crane Workshop
Capture techniques that lessen handling stress may also lessen pathologic influences on physiologic measures, improving the validity of these measures for use in individual health assessment of freeranging wildlife. Since 1990, the International Crane Foundation (ICF) has successfully used chemical immobilization with alpha-chloralose (AC; C6H11Cl3O6), a chloral derivative of glucose, to facilitate captures of sandhill cranes (Grus canadensis tabida) for ecological studies (Hayes et al. 2003). Although this chemical has been used orally for the immobilization of many species, the physiologic effects of AC are not well understood in cranes. …
Distribution, Densities, And Ecology Of Siberian Cranes In The Khroma River Region Of Northern Yakutia In Northeastern Russia, Inga P. Bysykatova, Gary L. Krapu, Nicolai I. Germogenov, Deborah A. Buhl
Distribution, Densities, And Ecology Of Siberian Cranes In The Khroma River Region Of Northern Yakutia In Northeastern Russia, Inga P. Bysykatova, Gary L. Krapu, Nicolai I. Germogenov, Deborah A. Buhl
Proceedings of the North American Crane Workshop
The Siberian crane (Grus leucogeranus) is the third rarest crane species in the world with a breeding range now centered on 3 core areas and a buffer zone in the arctic of northern Yakutia in northeastern Russia. During 16 July-2 August 2009, we undertook ground surveys within the Khroma River core breeding area, surrounding buffer zone, and lands lying to the west of the known breeding range to estimate densities and determine habitat use and social status of Siberian cranes. A total of 142 Siberian cranes were sighted (including 55 pairs) at 54 locations with 32 cranes (including 13 pairs) …
Countability Of Sandhill Cranes In Aerial Surveys, Douglas H. Johnson, John W. Solberg, Courtney L. Amundson
Countability Of Sandhill Cranes In Aerial Surveys, Douglas H. Johnson, John W. Solberg, Courtney L. Amundson
Proceedings of the North American Crane Workshop
Aerial surveys are used to monitor populations of many wildlife species, including sandhill cranes (Grus canadensis). In addition to the usual problems of detectability (involving both availability and perceptibility), aerial surveys of concentrated animals are subject to countability issues; from a rapidly moving aircraft, observers cannot count or accurately estimate the number of animals in a large group. Calibration is sometimes performed in an effort to adjust aerial counts for incomplete detectability and countability by calculating the ratio of animals actually in a group to the number in the group estimated from the aircraft. Here we explore alternative, …
Population Status And Geographic Distribution Of Greater Sandhill Cranes In The Mid-Continent Population, Gary L. Krapu, David A. Brandt
Population Status And Geographic Distribution Of Greater Sandhill Cranes In The Mid-Continent Population, Gary L. Krapu, David A. Brandt
Proceedings of the North American Crane Workshop
Number and geographic distribution of greater sandhill cranes (Grus canadensis tabida) in the mid-continent population (MCP) of sandhill cranes were evaluated. G. c. tabida comprised 7 of 133 (5.3%) individuals of 3 subspecies which projects to 31,579 ± 11,661 (SE) individuals in an estimated spring MCP of 600,000 cranes. From a platform transmitting terminal (PTT)-marked sample representative of the geographic distribution of G. c. tabida, 10 of 13 (77%) settled during the breeding season in east-central Canada/Minnesota, including 4 in northwestern Minnesota, 4 in Manitoba (2 at sites near the Minnesota border), and 2 in Ontario. Three …
Behavior And Habitat Use Of Greater Sandhill Cranes Wintering In East Tennessee, David A. Aborn
Behavior And Habitat Use Of Greater Sandhill Cranes Wintering In East Tennessee, David A. Aborn
Proceedings of the North American Crane Workshop
An increase of eastern greater sandhill cranes (Grus canadensis tabida) stopping over and wintering at the Hiwassee Wildlife Refuge in east Tennessee has led to overcrowding at the refuge, resulting in crane use of private property. Proper management is needed to prevent the cranes from becoming a nuisance, increase the suitability of the refuge for waterfowl, and reduce the likelihood of a disease outbreak. Observations of cranes revealed that cranes spent 83% of their time foraging, alert, or preening. Sandhill cranes foraged primarily in agricultural and grassy fields, whereas mudflats and shallow water were used for preening and …
Management Of Lands Along The Platte River Fromelmcreek To Lexington, Nebraska, As Crane Habitat, James J. Jenniges, Mark M. Peyton
Management Of Lands Along The Platte River Fromelmcreek To Lexington, Nebraska, As Crane Habitat, James J. Jenniges, Mark M. Peyton
Proceedings of the North American Crane Workshop
To meet Federal Energy Regulatory Commission (FERC) license requirements for the operation of 5 hydroelectric power plants on the North Platte and Platte Rivers in Nebraska, the Nebraska Public Power District (NPPD) and The Central Nebraska Public Power and Irrigation District (Central) together have become the second largest owners and managers of lands for the conservation of endangered species and migratory waterbirds along the central reach of the Platte River. We describe here the management activities on the properties, success of the management in achieving objectives, and the response of sandhill (Grus canadensis) and whooping cranes (G. …
Nocturnal Roost Site Selection And Diurnal Habitat Use By Sandhill Cranes During Spring In Central Nebraska, Craig A. Davis
Nocturnal Roost Site Selection And Diurnal Habitat Use By Sandhill Cranes During Spring In Central Nebraska, Craig A. Davis
Proceedings of the North American Crane Workshop
During spring 1998 and 1999, the Platte River Whooping Crane Maintenance Trust conducted ground and aerial surveys of staging sandhill cranes (Grus canadensis; hereafter, cranes) to detennine roost site selection and habitat-use patterns along a l20-Ian stretch of the Platte River in south-central Nebraska. Cranes peaked at 232,023 during 22-28 March 1998 and 206,074 during 28 Februaty-6 March 1999 in the study area, a portion of the total crane staging area in the Platte River Valley. Diurnal observations showed that 48% of the cranes were in com fields, 34% in lowland grasslands, 13% in alfalfa fields, and 5% …
Counting Cranes: How Much Effort Is Enough?, Douglas H. Johnson, Roderick C. Drewien, Douglas S. Benning
Counting Cranes: How Much Effort Is Enough?, Douglas H. Johnson, Roderick C. Drewien, Douglas S. Benning
Proceedings of the North American Crane Workshop
Accurate population estimates of sandhill cranes (Grus canadensis) are important because management decisions, such as establishing hunting regulations, are based on those estimates. Counts often are made during aerial surveys when the cranes are congregated. A complete census may be feasible if the area to be surveyed is small and adequate resources are available. For large areas, resources may be inadequate for a census so partial counts (sample surveys) are made. Because cranes are gregarious, the counts in a sample of units may contain either a disproportionately large, or a disproportionately small, fraction of the total, leading to …
Woody Vegetation Expansion And Continuing Declines In Open Channel Habitat On The Platte River In Nebraska, Paul J. Currier
Woody Vegetation Expansion And Continuing Declines In Open Channel Habitat On The Platte River In Nebraska, Paul J. Currier
Proceedings of the North American Crane Workshop
Aerial videography in 1988 and 1994 of the same selected segments of the Big Bend reach of the Platte River in central Nebraska was compared. During this 6-year period, channel area declined 4 to 41 % (median 26%). In river segments where the channel had already narrowed significantly and at sites where channel habitat is actively managed declines were less (17-18%). These substantial changes occurred during a time that included a relatively low flow period (1990-92). Flows during the summer gertttination and establishment period (mid-May through August) for cottonwood (Populus deltoides) and willow (Salix spp.), the …
Contaminant Residues In Sandhill Cranes Killed Upon Striking Powerlines In Central Nebraska, Timothy E. Fannin
Contaminant Residues In Sandhill Cranes Killed Upon Striking Powerlines In Central Nebraska, Timothy E. Fannin
Proceedings of the North American Crane Workshop
In 1989 and 1990, 58 sandhill cranes (Grus canadensis) were collected along the central Platte River in Nebraska during a study of mortality caused by powerline impact. Brains were assayed for acetylcholinesterase activity; gut contents were analyzed for residues of 25 organophosphate and 6 carbamate compounds; and livers were analyzed for 20 inorganics (including lead, mercury, and boron) and 22 organochlorine chemicals. Brain acetylcholinesterase activities appeared to be within normal ranges, and no measurable organophosphate or carbamate residues were found in the gut contents of 5 birds with the lowest brain enzyme activities. Heptachlor epoxide, oxychlordane. p,p' -DDE, …
History And Economic Impact Of Crane-Watching In Central Nebraska, Gary R. Lingle
History And Economic Impact Of Crane-Watching In Central Nebraska, Gary R. Lingle
Proceedings of the North American Crane Workshop
The first documentation of the Platte and North Platte rivers' importance to sandhill cranes (Grus canadensis) dates from the late 1800's. Except for a few ornithologists, it was not until the mid-1970's that crane-watching became popular. During the last 10 years, this interest has become a multi-million dollar tourist industry that attracts people from around the globe who seek to witness this vernal spectacle of half a million cranes. More than half of the former riverine habitat has been abandoned by the cranes, largely because of irrigation and hydropower projects that drain the river and enable forests to …
Sandhill Crane Collisions With Power Lines In Southcentral Nebraska, John P. Ward, Stanley H. Anderson
Sandhill Crane Collisions With Power Lines In Southcentral Nebraska, John P. Ward, Stanley H. Anderson
Proceedings of the North American Crane Workshop
Sandhill crane (Grus canadensis) collisions with power lines were studied in southcentral Nebraska in 1986 and 1987. Approximately 596 km of power lines were surveyed for dead cranes in 1986, and 210 km of power lines in 1987. A total of 135 dead cranes were located. Cranes collided 4 times more with transmission lines than distribution lines, although distribution lines were twice as abundant. We believe cranes collided with the static wires on the transmission lines. Juveniles and Canadian sandhill cranes (G.c. rowani) had a higher probability of colliding with power lines than other age groups …
Characteristics Of Whooping Crane Roost Sites In The Platte River, Craig A. Faanes, Douglas H. Johnson, Gary R. Lingle
Characteristics Of Whooping Crane Roost Sites In The Platte River, Craig A. Faanes, Douglas H. Johnson, Gary R. Lingle
Proceedings of the North American Crane Workshop
The Big Bend of the Platte River in centraJ Nebraska provides important migration habitat for whooping cranes (Grus americana). River profiles were obtained at 23 confumed nocturnal roost sites occupied by whooping cranes during 1983 -90. Whooping cranes selected roost sites that had shallower water depths than at unused sites. All but 4 roosts were located in channels wider than 150 m; roost sites were an average of 27.8 % of the channel width from the nearer shore. Nearly 90% of the roost sites had a trench of deeper water on both sides. Proper management of the Platte …
Prevention Of Eastern Equine Encephalitis Virus In Captive Cranes, James W. Carpenter, Douglas M. Watts, C. L. Crabbs, Gary G. Clark, Thomas W. Scott, Douglas Docherty, Benedict B. Pagac, Jeannine M. Dorothy, James G. Olson, F. Joshua Dein
Prevention Of Eastern Equine Encephalitis Virus In Captive Cranes, James W. Carpenter, Douglas M. Watts, C. L. Crabbs, Gary G. Clark, Thomas W. Scott, Douglas Docherty, Benedict B. Pagac, Jeannine M. Dorothy, James G. Olson, F. Joshua Dein
Proceedings of the North American Crane Workshop
An epizootic of eastern equine encephalitis (EEE) virus infection in 1984 resulted in death for 7 of 39 captive whooping cranes (Grus americana) at the Patuxent Wildlife Research Center. This represented the first known whooping crane deaths associated with this arboviral disease and posed a serious risk to the continued propagation of this endangered species. Subsequent research and surveillance procedures initiated to prevent EEE viral infections in captive whooping cranes included vector surveillance and control, virus surveillance through use of sentinel birds, immunoassays for rapid detection of EEE virus antigen in bird sera and in mosquitoes, and testing …
Factors Influencing The Future Of Whooping Crane Habitat On The Platte River In Nebraska, Craig A. Faanes
Factors Influencing The Future Of Whooping Crane Habitat On The Platte River In Nebraska, Craig A. Faanes
Proceedings of the North American Crane Workshop
Lands along 86 km of the Platte River in Nebraska were designated by the U.s. Department of Interior as critical habitat for the endangered whooping crane (Grus americana) in 1978. The designation established the legal basis for the continued protection of lands critical to the survival and recovery of whooping cranes. Currently there are 14 federal, state, and local water projects planned for the Platte River system. If completed, total withdrawal would be about 80% of the remaining 30% of the original flow. In this paper I summarize those projects and discuss their potential impact on whooping crane habitat. …
Unobstructed Visibility At Whooping Crane Roost Sites On The Platte River, Nebraska, Craig A. Faanes
Unobstructed Visibility At Whooping Crane Roost Sites On The Platte River, Nebraska, Craig A. Faanes
Proceedings of the North American Crane Workshop
Unobstructed visibility is an important component of whooping crane (Grus americana) roosting habitat. Recent habitat modeling efforts suggest that unobstructed horizontal visibility is suitable at a minimum of 335 m. Unobstructed upstream and downstream visibility is also an important part of whooping crane roosting habitat, but quantification of that parameter has not been reported previously, or incorporated into species models. Data from the Platte River suggest that a minimum of 732 m of unobstructed upstream and downstream visibility is needed at whooping crane roost sites.
Whooping Crane Riverine Roosting Habitat Suitability Model, Jerry W. Ziewitz
Whooping Crane Riverine Roosting Habitat Suitability Model, Jerry W. Ziewitz
Proceedings of the North American Crane Workshop
Water development interests on the Platte River in Nebraska and recognition of the importance of this river as migratory bird habitat have prompted studies to determine how much water is needed to maintain wildlife habitat values. The whooping crane (Grus americana) is one of many species that use the Platte. A model was developed to quantify the relationship between river discharge and roosting habitat suitability for whooping cranes, designed to accommodate the data collection and hydraulic simulation techniques of the Instream Flow Incremental Methodology. Results of the model indicate that optimum roosting habitat conditions in the Big Bend …
Relationship Of Channel Maintenance Flows To Whooping Crane Use Of The Platte River, Craig A. Faanes, David B. Bowman
Relationship Of Channel Maintenance Flows To Whooping Crane Use Of The Platte River, Craig A. Faanes, David B. Bowman
Proceedings of the North American Crane Workshop
Periodic high flows in the Platte River are necessary to scour vegetation and redistribute sediment in the stream channel. Peak and mean annual flows have been reduced by as much as 70% from pre-development times, but channel maintenance flows still occur, although at a much reduced frequency and magnitude of occurrence. Use of the Platte River by migrant whooping cranes (Grus americana) in recent years appears to be related to the recent occurrence of flows in excess of 8,000 cfs for 5 or more consecutive days.