Open Access. Powered by Scholars. Published by Universities.®
Ecology and Evolutionary Biology Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 15 of 15
Full-Text Articles in Ecology and Evolutionary Biology
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. …
New Hunter Education Strategies To Protect Whooping Cranes In Texas And Kansas, Lee Ann Johnson Linam, Helen M. Hands, Jay Roberson
New Hunter Education Strategies To Protect Whooping Cranes In Texas And Kansas, Lee Ann Johnson Linam, Helen M. Hands, Jay Roberson
Proceedings of the North American Crane Workshop
The decline of the whooping crane (Grus americana) has often been attributed primarily to loss of habitat and overharvest. Although hunting of whooping cranes is now prohibited, shootings sometimes occur. Recent incidences have prompted the Texas Parks and Wildlife Department (Texas) and the Kansas Department of Wildlife and Parks (Kansas) to develop new strategies that increase hunter recognition of legal game species and awareness of endangered species concerns. Both agencies have produced or updated publications for goose and sandhill crane (Grus canadensis) hunters. Texas has developed video news releases for the general public and a video/DVD …
Safety Of West Nile Virus Vaccines In Sandhill Crane Chicks, Glenn H. Olsen, Kimberli J. Miller, Douglas E. Docherty, Valerie Bochsler
Safety Of West Nile Virus Vaccines In Sandhill Crane Chicks, Glenn H. Olsen, Kimberli J. Miller, Douglas E. Docherty, Valerie Bochsler
Proceedings of the North American Crane Workshop
West Nile virus arrived in North America in 1999 and has spread across the continent in the ensuing years. The virus has proven deadly to a variety of native avian species including sandhill cranes (Grus canadensis). In order to provide safe and efficacious protection for captive and released populations of whooping cranes (G. americana), we have conducted a series of four research projects. The last of these was a study of the effects of two different West Nile virus vaccines on young Florida sandhill crane (G. c. pratensis) chicks and subsequent challenge with the virus. …
Temporal Distribution Of Harvested Mid-Continent Sandhill Cranes Within The Central Flyway States During The 1997-2001 Hunting Seasons, Adrianna C. Araya, James A. Dubovsky
Temporal Distribution Of Harvested Mid-Continent Sandhill Cranes Within The Central Flyway States During The 1997-2001 Hunting Seasons, Adrianna C. Araya, James A. Dubovsky
Proceedings of the North American Crane Workshop
Since 1975, annual harvest estimates for Mid-Continent sandhill cranes (Grus canadensis) have been collected in all states for which a hunting season has been authorized by the U.S. Fish and Wildlife Service (Service). Although these data have been used to monitor the harvest of the Mid-Continent population, analyses to promote understanding of the temporal distribution of harvested sandhill cranes by individual states throughout the Central Flyway have not been conducted. For the 1997-2001 hunting seasons, we collected harvest questionnaires from 4,408 hunters in the Central Flyway who provided information about the date, location, and number of harvested sandhill …
Infectious Bursal Disease In Wild Populations Of Turkeys And Sandhill Cranes: Preliminary Findings, Kristen L. Candelora, Marilyn G. Spalding, Stephen A. Nesbitt, Holly S. Sellers, Jeremy Olson, Larry Perrin, Jeannette Parker
Infectious Bursal Disease In Wild Populations Of Turkeys And Sandhill Cranes: Preliminary Findings, Kristen L. Candelora, Marilyn G. Spalding, Stephen A. Nesbitt, Holly S. Sellers, Jeremy Olson, Larry Perrin, Jeannette Parker
Proceedings of the North American Crane Workshop
Captive-reared whooping cranes (Grus americana) released into Florida for the resident reintroduction project experienced unusually high mortality and morbidity during the 1997-1998 and 2001-2002 release seasons (Spalding et al. 2008). Infectious bursal disease virus (IBDV) serotype 2 is currently under investigation as the factor that precipitated the mortality events. A small percentage of whooping cranes have been exposed to IBDV in the captive setting. However, many more are being exposed postrelease, and prevalence of exposure seems to increase with age or length of time the birds are in the wild in Florida (Spalding et al. 2008). The goals …
Is Magnitude Of Fat Storage By Spring-Staging Sandhill Cranes Declining In The Central Platte River Valley , Nebraska?, David A. Brandt, Gary L. Krapu
Is Magnitude Of Fat Storage By Spring-Staging Sandhill Cranes Declining In The Central Platte River Valley , Nebraska?, David A. Brandt, Gary L. Krapu
Proceedings of the North American Crane Workshop
Proximate analyses of carcasses of sandhill cranes (Grus canadensis) collected in the Central Platte River Valley (CPRV), Nebraska, during spring 1999 indicated a marked decline in fat levels from springs 1978 and 1979. Concern that amounts of fat cranes stored by their spring departures from the CPRV may have further declined prompted this evaluation. For our assessment, we made use of morphological measurements (culmen post nares, tarsus, flattened wing chord) along with body mass on each of 810 sandhill cranes that were collected for proximate analysis or captured with rocket nets at widely distributed sites in the CPRV during 1978-1979 …
Temporal Dynamics And Flock Characteristics Of Sandhill Cranes In The Platte River Valley , Nebraska, Felipe Chavez-Ramirez
Temporal Dynamics And Flock Characteristics Of Sandhill Cranes In The Platte River Valley , Nebraska, Felipe Chavez-Ramirez
Proceedings of the North American Crane Workshop
I gathered information on crane flocks in the Platte River Valley during spring staging of 2002-2004. The objective of
this work was to evaluate hypotheses regarding flock size and formation using sandhill crane (Grus canadensis) flocks observed in
the Platte River Valley. Specifically, I wanted to: (a) evaluate the effect of period of migration, geographical location, and habitat
type on flock size, and (b) evaluate predictions regarding ecological theories of flock formation and behavior based on concentrated
resources, accessibility, social facilitation, and potential predation response. Flock size overall was influenced negatively by period
of migration (P < 0.001) and positively by geographical location (P < 0.01). Total crane abundance (55%) of flocks were located
in corn fields, but …
Hunting Success For Mid-Continent Sandhill Cranes In The Central Flyway: Comparing Current And Historic Results, James A. Dubovsky, Adrianna C. Araya
Hunting Success For Mid-Continent Sandhill Cranes In The Central Flyway: Comparing Current And Historic Results, James A. Dubovsky, Adrianna C. Araya
Proceedings of the North American Crane Workshop
Sport hunting for the Mid-continent population of sandhill cranes (Grus canadensis) in the United States resumed in New Mexico in 1961 after a 45-year moratorium. Interest in crane hunting continued to increase and by 1975, 8 states were participating in sandhill crane hunting. Currently, hunting seasons have been established in all Central Flyway states except Nebraska. Efforts to collect information on the annual harvest of sandhill cranes began in 1975 when hunters were required to obtain federal sandhill crane hunting permits. The permits included a hunting diary whereby hunters were asked to record information about their daily hunting …
Extra-Pair Paternity In Sandhill Cranes, Matthew A. Hayes, Hugh B. Britten, Jeb A. Barzen
Extra-Pair Paternity In Sandhill Cranes, Matthew A. Hayes, Hugh B. Britten, Jeb A. Barzen
Proceedings of the North American Crane Workshop
Although cranes are known for “life-long” pair bonds, exceptions to this rule have been observed (i.e. divorcing pairs and individuals re-pairing following the death of a mate). With advancements in genetic techniques, another form of infidelity has been observed: extra-pair paternity (EPP; producing young with a bird while being socially paired to another mate) has been documented in many avian species. Is this true for cranes as well? Sandhill cranes (Grus canadensis) from a dense breeding population in southcentral Wisconsin were tested for EPP using 6 microsatellite DNA markers. The frequency of EPP ranged between 4.4% (2 of 45 chicks) …
Mate Fidelity In A Dense Breeding Population Of Sandhill Cranes, Matthew A. Hayes, Jeb A. Barzen, Hugh B. Britten
Mate Fidelity In A Dense Breeding Population Of Sandhill Cranes, Matthew A. Hayes, Jeb A. Barzen, Hugh B. Britten
Proceedings of the North American Crane Workshop
The objective of this study was to investigate mate switches observed in a dense breeding population of banded Sandhill Cranes (Grus canadensis). Over a 14-year period, 50 of 70 breeding pairs switched mates (71%), with 45 pairs switching permanently (64%). Mean mate retention between years was 83%, with an average pair bond lasting 5.7 years (range 1-13 years). Most permanent switches occurred following the death or disappearance of a mate, and overall permanent divorce (19%; 13 of 70 pairs) and annual divorce rates (6%) were low. Territory retention following mate switches was high. Males and females did not …
West Nile Encephalitis In A Captive Florida Sandhill Crane, Cristina M. Hansen, Barry K. Hartup, Olga D. Gonzalez, Douglas E. Lyman, Howard Steinberg
West Nile Encephalitis In A Captive Florida Sandhill Crane, Cristina M. Hansen, Barry K. Hartup, Olga D. Gonzalez, Douglas E. Lyman, Howard Steinberg
Proceedings of the North American Crane Workshop
A 37 year old captive male Florida sandhill crane (Grus canadensis pratensis) housed at the International Crane Foundation exhibited abnormal neurologic signs in the fall of 2006. Despite therapy and supportive care, the neurologic signs worsened and the crane was euthanized after 6 days. Antemortem and postmortem serum was positive for flavivirus antibody, and a cloacal swab was positive for West Nile virus (WNV) by reverse transcriptase polymerase chain reaction (RT-PCR). Pectoral muscle atrophy and multifocal myocardial necrosis were observed at necropsy. Histopathologic findings included inflammatory and necrotic lesions in sections of brain, spinal cord, eye, heart, blood …
Spring Migratory Habits And Breeding Distribution Of Lesser Sandhill Cranes That Winter In West-Central New Mexico And Arizona, Gary L. Krapu, David A. Brandt
Spring Migratory Habits And Breeding Distribution Of Lesser Sandhill Cranes That Winter In West-Central New Mexico And Arizona, Gary L. Krapu, David A. Brandt
Proceedings of the North American Crane Workshop
Little information exists on the spring migratory habits and breeding distribution of lesser sandhill cranes (Grus canadensis canadensis) that winter in west-central New Mexico and southeastern Arizona. To address this question, we captured and attached a total of 6 Platform Transmitting Terminals (PTT) to adult lesser sandhill cranes at 2 sites each in west-central New Mexico and southeastern Arizona during December 2001 and monitored the birds’ movements to arrival on their arctic breeding grounds. After departing from their wintering grounds, 2 of the cranes stopped at Monte Vista NWR in south-central Colorado where they stayed for 17 and …
Distribution An D Dispersion Patterns Of San Dhill Crane Flocks In The Platte River Valley, Brian Lorenz, Felipe Chavez-Ramirez
Distribution An D Dispersion Patterns Of San Dhill Crane Flocks In The Platte River Valley, Brian Lorenz, Felipe Chavez-Ramirez
Proceedings of the North American Crane Workshop
We evaluated sandhill crane (Grus canadensis) flock distribution and dispersion patterns along the Platte River Valley, Nebraska, in 2002-2003. The objectives were to: (a) determine the overall distribution and relationship between roosting and foraging flock numbers by bridge segments, (b) evaluate flocking characteristics in relation to abundance of cranes in different bridge segments and total abundance, and (c) correlate dispersion patterns and habitat use to period of migration, roost locations, and habitat types. Preliminary predictions included: foraging flock dispersions would be correlated with roost locations; greater numbers and larger flock sizes will be present in bridge segments with …
Sandhill Crane Nest Habitat Selection And Factors Affecting Nest Success In Northwestern Minnesota, Stephen J. Maxson, John R. Fieberg, Michael R. Riggs
Sandhill Crane Nest Habitat Selection And Factors Affecting Nest Success In Northwestern Minnesota, Stephen J. Maxson, John R. Fieberg, Michael R. Riggs
Proceedings of the North American Crane Workshop
We studied 62 greater sandhill crane (Grus canadensis tabida) nests in northwestern Minnesota during 1989-1991 to document nest habitat use and selection, nest success, and factors associated with nest success. We recorded 15 habitat variables at each nest and at a randomly selected site in the same wetland. Nests were in basins 0.01-601 ha (Median = 2.2 ha) and at water depths 0-35.7 cm (Median = 9.7 cm). Cattail (Typha sp.) was the dominant vegetation at 58.0% of nests while 21.0% were at sites dominated by phragmites (Phragmites australis). Conditional logistic regression models indicated …
Is The Annual March Survey Of The Midcontinental San Dhill Crane Population Appropriately Timed To Reliably Estimate Population Size?, Gary L. Krapu, David A. Brandt
Is The Annual March Survey Of The Midcontinental San Dhill Crane Population Appropriately Timed To Reliably Estimate Population Size?, Gary L. Krapu, David A. Brandt
Proceedings of the North American Crane Workshop
The U.S. Fish and Wildlife Service relies on an annual aerial photo-corrected survey conducted on the fourth Tuesday of March each year in the Central Platte River Valley (CPRV) and North Platte River Valley (NPRV) of Nebraska to estimate size of the midcontinental population (MCP) of sandhill cranes (Grus canadensis) to help guide population management. Wide unaccounted for annual fluctuations in survey counts over the past 25 years have raised concerns that many cranes either have left the Platte before the survey, have not yet arrived, or over fly the Platte entirely in some years. As a result, …