Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Publication Year
Articles 31 - 60 of 95
Full-Text Articles in Ornithology
Ten-Year Status Of The Eastern Migratory Whooping Crane Reintroduction, Richard P. Urbanek, Sara E. Zimorski, Eva K. Szyskoski, Marianne M. Wellington
Ten-Year Status Of The Eastern Migratory Whooping Crane Reintroduction, Richard P. Urbanek, Sara E. Zimorski, Eva K. Szyskoski, Marianne M. Wellington
Proceedings of the North American Crane Workshop
From 2001 to 2010, 132 costume-reared juvenile whooping cranes (Grus americana) were led by ultralight aircraft from Necedah National Wildlife Refuge (NWR) in central Wisconsin to the Gulf Coast of Florida on their first autumn migration (ultralight-led or UL), and 46 juveniles were released directly on Necedah NWR during autumn of the hatch year (direct autumn release or DAR). Return rate in spring was 90.5% for UL and 69.2% for DAR, the lower value of the latter attributable to 1 cohort with migration problems. Overall population survival 1 year and from 1 to 3 years post-release was 81% and 84%, …
The Role Of Retrieval And Translocation In A Reintroduced Population Of Migratory Whooping Cranes, Sara E. Zimorski, Richard P. Urbanek
The Role Of Retrieval And Translocation In A Reintroduced Population Of Migratory Whooping Cranes, Sara E. Zimorski, Richard P. Urbanek
Proceedings of the North American Crane Workshop
Beginning in 2001, a reintroduction project was initiated using captive-reared whooping cranes (Grus americana) to establish a migratory flock in eastern North America. From May 2003 to August 2008, 23 of these birds were retrieved and translocated in 15 separate events. These individuals consisted of 14 cranes that had been led to Florida by ultralight aircraft on their first autumn migration (UL) and 9 cranes that had been directly released in autumn in Wisconsin (DAR). Of 104 (86 UL and 18 DAR) reintroduced individuals that eventually departed from their release location, 22% were later retrieved 1-3 times. Lake …
Examination Of Opportunistically Collected Eggs Laid By Whooping Cranes In Florida, Marilyn G. Spalding, Martin J. Folk, Stephen A. Nesbitt
Examination Of Opportunistically Collected Eggs Laid By Whooping Cranes In Florida, Marilyn G. Spalding, Martin J. Folk, Stephen A. Nesbitt
Proceedings of the North American Crane Workshop
We examined 41 whooping crane (Grus americana) eggs or egg remains from 27 nests in the field (n = 4), in the laboratory (n = 33), or incubated by another pair (n = 1), or in captivity (n = 3). Eggs were collected because the nest was in danger (2 eggs, 1 nest), abandoned (5 eggs, 4 nests), or failed to hatch after 34 days (27 eggs, 16 nests), or they were removed for management purposes (5 eggs, 3 nests). Evidence of fertility was found in 18 eggs (12 nests, 44%) of 33 opened. The remainder were either …
The Direct Autumn Release Of Whooping Cranes Into The Eastern Migratory Population: A Summary Of The First Three Years, Marianne M. Wellington, Richard P. Urbanek
The Direct Autumn Release Of Whooping Cranes Into The Eastern Migratory Population: A Summary Of The First Three Years, Marianne M. Wellington, Richard P. Urbanek
Proceedings of the North American Crane Workshop
This paper describes methods used in an experimental direct autumn release of captive produced whooping cranes (Grus americana) into a reintroduced migratory population in eastern North America. Eighteen chicks (4 in 2005, 4 in 2006, and 10 in 2007) were eventually released in the vicinity of adult whooping cranes or wild sandhill cranes (G. canadensis). Chicks were reared by costumed aviculturists using strict isolation-rearing techniques at the International Crane Foundation (ICF) and then transferred to Necedah National Wildlife Refuge in central Wisconsin. Initially, 23 chicks were transferred from ICF to Necedah at ages of 17-46 days. …
Nest Desertion In A Reintroduced Population Of Migratory Whooping Cranes, Richard P. Urbanek, Sara E. Zimorski, Anna M. Fasoli, Eva K. Szyszkoski
Nest Desertion In A Reintroduced Population Of Migratory Whooping Cranes, Richard P. Urbanek, Sara E. Zimorski, Anna M. Fasoli, Eva K. Szyszkoski
Proceedings of the North American Crane Workshop
Reintroduction of an eastern migratory population of whooping cranes (Grus americana) into eastern North America began in 2001. Reproduction first occurred in 2005. Through 2008, eggs were produced in 22 first nests and 2 renests. All first nests failed–50% confirmed due to desertion by the parents and the remaining nest failures also consistent with the pattern of parental desertion. Nest failures were not related to stage of incubation, and they were often synchronous. Temperatures in winter and early spring affected timing of nest failure. An environmental factor such as harassment of incubating cranes by black flies (Simulium …
Behavior Comparisons Of Two Rearing Protocols For Whooping Cranes Raised By Costumed Caregivers And Trained For An Ultralight-Led Migration, Glenn H. Olsen, John B. French
Behavior Comparisons Of Two Rearing Protocols For Whooping Cranes Raised By Costumed Caregivers And Trained For An Ultralight-Led Migration, Glenn H. Olsen, John B. French
Proceedings of the North American Crane Workshop
Whooping crane (Grus americana) colts are raised at USGS Patuxent Wildlife Research Center, Laurel, Maryland for the first 40-60 days of a chick's life as part of the Whooping Crane Eastern Partnership (WCEP) ultralight-led reintroduction. Numbers raised for WCEP are increasing each year. Up to 2005, we raised whooping crane chicks in the Propagation Building where there are 10 indoor/outdoor pens, 8 full pens, and 2 half-size pens. In 2005 WCEP proposed increasing the number of colts reared to 20-24, numbers beyond the capacity of the facility. To accommodate this greater number of chicks, we modified several outdoor …
Pathology Associated With Lightning Strike And Drowning Mortality Of Whooping Cranes In Florida, Marilyn G. Spalding, Scott Terrell, William B. Brooks
Pathology Associated With Lightning Strike And Drowning Mortality Of Whooping Cranes In Florida, Marilyn G. Spalding, Scott Terrell, William B. Brooks
Proceedings of the North American Crane Workshop
Severe thunderstorms associated with a strong front passing through the Gulf Coast of Florida on the night of 1-2 February 2007 resulted in the death of 17 whooping cranes (Grus americana) penned at Chassahowitzka National Wildlife Refuge. Postmortem examination of 4 of the birds revealed saline fluid in lungs and airsacs consistent with drowning. Coagulation necrosis and other histologic changes in kidney, peripheral nerve, airsac membranes, and heart muscle further indicated electrocution and are comparable to other cases of electrocution associated with power-line strikes in Florida. Aspiration of seawater was the most likely cause of death of birds …
Survival, Reproduction, And Movements Of Migratory Whooping Cranes During The First Seven Years Of Reintroduction, Richard P. Urbanek, Lara E. A. Fondow, Sara E. Zimorski
Survival, Reproduction, And Movements Of Migratory Whooping Cranes During The First Seven Years Of Reintroduction, Richard P. Urbanek, Lara E. A. Fondow, Sara E. Zimorski
Proceedings of the North American Crane Workshop
An effort to reintroduce a migratory population of whooping cranes (Grus americana) into eastern North America began in 2001. During 2001-2007, 125 juveniles were costume/isolation-reared and released: 106 were led by ultralight aircraft from Necedah National Wildlife Refuge (NWR), central Wisconsin, to Chassahowitzka NWR, central Gulf Coast of Florida, on their first autumn migration (ultralight-led or UL). The remaining 19 individuals were released directly on Necedah NWR during autumn of the hatch year (direct autumn release or DAR). Of 86 UL and 13 DAR cranes that completed their first spring migration, 72 (84%) and 5 (38%), respectively, returned …
Status Of Non-Migratory Whooping Cranes In Florida, Martin J. Folk, James A. Rodgers Jr., Timothy A. Dellinger, Stephen A. Nesbitt, Jeannette M. Parker, Marilyn G. Spalding, Stephen B. Baynes, M. Kathleen Chappell, Stephen T. Schwikert
Status Of Non-Migratory Whooping Cranes In Florida, Martin J. Folk, James A. Rodgers Jr., Timothy A. Dellinger, Stephen A. Nesbitt, Jeannette M. Parker, Marilyn G. Spalding, Stephen B. Baynes, M. Kathleen Chappell, Stephen T. Schwikert
Proceedings of the North American Crane Workshop
We soft-released 289 whooping cranes (Grus americana) into central Florida during 1993-2006 in an effort to establish a non-migratory population. As of September 2008, the population numbered 30 birds (11 pairs), including 12 males and 18 females. Survival and productivity rates have been lower than expected. Males did not survive past 10 years of age, whereas females have lived to at least 15 years of age. Most older males died as a result of predation or from colliding with power lines. We marked power lines and developed a streamlined transmitter to help reduce the number of collisions with …
Eastern Equine Encephalitis In Florida Whooping Cranes, Marilyn G. Spalding, Lillian M. Stark
Eastern Equine Encephalitis In Florida Whooping Cranes, Marilyn G. Spalding, Lillian M. Stark
Proceedings of the North American Crane Workshop
Two whooping cranes (Grus americana) that were part of separate projects to reintroduce whooping cranes in eastern North America died suddenly in Florida following a few days of abnormal behavior. The first case was a semi-captive bird on ultralight-led migration from Wisconsin to Florida in December 2004. The second case was a molting 10-year-old male and successful wild breeder that died in May, 2005. Clinical signs were lethargy, abnormal posture, isolation followed by attack by other birds, collapse, heart murmur, and death. Eastern equine encephalitis virus (alphavirus) was isolated from the liver of both birds. The most severe …
Sandhill Crane Staging And Whooping Crane Migratory Stopover Dynamics In Response To River Management Activities On The Central Platte River, Nebraska, Usa, Felipe Chavez-Ramirez
Sandhill Crane Staging And Whooping Crane Migratory Stopover Dynamics In Response To River Management Activities On The Central Platte River, Nebraska, Usa, Felipe Chavez-Ramirez
Proceedings of the North American Crane Workshop
The Central Platte River Valley (CPRV) is a critical stopover for migrating whooping cranes (Grus americana) and the most important staging area for sandhill cranes (G. canadensis) in North America. Due to reduced water flows caused by human activities, the Platte River no longer follows its traditional hydrograph which consisted of high spring flows that produced scouring action that eliminated vegetation. To provide adequate crane roosting habitat during stopover and staging periods, annual and woody vegetation has been mechanically cleared on eastern portions of the CPRV since 1980. Staging sandhill crane riverine roosting area has decreased …
Evaluating Propagation Method Performance Over Time With Bayesian Updating: An Application To Incubator Testing, Sarah J. Converse, Jane N. Chandler, Glenn H. Olsen, Charles C. Shafer
Evaluating Propagation Method Performance Over Time With Bayesian Updating: An Application To Incubator Testing, Sarah J. Converse, Jane N. Chandler, Glenn H. Olsen, Charles C. Shafer
Proceedings of the North American Crane Workshop
In captive-rearing programs, small sample sizes can limit the quality of information on performance of propagation methods. Bayesian updating can be used to increase information on method performance over time. We demonstrate an application to incubator testing at USGS Patuxent Wildlife Research Center. A new type of incubator was purchased for use in the whooping crane (Grus americana) propagation program, which produces birds for release. We tested the new incubator for reliability, using sandhill crane (Grus canadensis) eggs as surrogates. We determined that the new incubator should result in hatching rates no more than 5% lower …
Video Surveillance Of Nesting Whooping Cranes, Timothy A. Dellinger, Martin J. Folk
Video Surveillance Of Nesting Whooping Cranes, Timothy A. Dellinger, Martin J. Folk
Proceedings of the North American Crane Workshop
The primary objective of the whooping crane (Grus americana) recovery plan is to establish and maintain 3 selfsustaining wild populations, 1 being a non-migratory Florida population. From 1993 to 2005, we released 289 captive cranes in central Florida, with 31 surviving as of 1 June 2008. From 1995 to 2008 we monitored 68 nests of the Florida population; from those, only 32 chicks hatched and 9 fledged. It often was not apparent why nests failed, and it was not practical to conduct labor-intensive observations at nests; therefore, we collected behavioral data using 12-volt VHS video surveillance cameras at …
The Effects Of Anticoagulant Choice And Sample Processing Time On Hematologic Values Of Juvenile Whooping Cranes, Joan Maurer, Betsy Reichenberg, Cristin Kelley, Barry K. Hartup
The Effects Of Anticoagulant Choice And Sample Processing Time On Hematologic Values Of Juvenile Whooping Cranes, Joan Maurer, Betsy Reichenberg, Cristin Kelley, Barry K. Hartup
Proceedings of the North American Crane Workshop
Blood collected from juvenile whooping cranes (Grus americana) in 2007 and 2008 was divided and placed in either the anticoagulant lithium heparin (LiHep) or tri-potassium ethylenediaminetetraacetic acid (K3EDTA) for diagnostic hematology. Thin smears were prepared from the anticoagulated blood in the field with no delay and in the laboratory after a 4-6-hour delay, and then used to determine differential and total leukocyte counts. Manual heterophil and eosinophil counts were greater in LiHep-treated samples compared to K3EDTA samples (P < 0.05), but there was no difference in the total leukocyte concentration or differential leukocyte counts between anticoagulants based on blood smears prepared with no delay (n = 15). Marked differences were noted in relative heterophil (P < 0.05) and lymphocyte (P < 0.05) counts and total leukocyte (P < 0.05) concentrations of K3EDTA-treated samples processed after the delay (n = 7), suggesting a negative effect on lymphocyte integrity from the anticoagulant. Microscopically, lymphocytes were more intact and easily differentiated from thrombocytes in LiHep-treated samples than K3EDTA, but modest thrombocyte clumping in the LiHep samples was a concern. Either anticoagulant appears adequate for diagnostic hematology in juvenile whooping cranes based on this limited analysis, but blood smears should be prepared immediately under controlled conditions for best results.
Reproductive Health And Performance Of The Florida Flock Of Introduced Whooping Cranes, Marilyn G. Spalding, Martin J. Folk, Stephen A. Nesbitt, Richard Kiltie
Reproductive Health And Performance Of The Florida Flock Of Introduced Whooping Cranes, Marilyn G. Spalding, Martin J. Folk, Stephen A. Nesbitt, Richard Kiltie
Proceedings of the North American Crane Workshop
We retrospectively examined the reproductive parameters of 122 breeding-age whooping cranes (Grus americana) in a reintroduced flock in central Florida from 1992 to 2007. The flock performed poorly when compared with an existing wild flock for all reproductive parameters when controlled for age. Pairs first formed in 1995, nested in 1999, and the first chick fledged in 2002. By 2007, 19 of 63 clutches produced 25 chicks, 9 of which fledged. Drought conditions were ruled out as the sole cause of failure when the drought lessened and productivity increased, but not in all years. We examined adult health, …
A Retrospective Of Whooping Cranes In Captivity, Cindi Barrett, Thomas V. Stehn
A Retrospective Of Whooping Cranes In Captivity, Cindi Barrett, Thomas V. Stehn
Proceedings of the North American Crane Workshop
Early records of captive whooping cranes (Grus americana) were compiled from historical files kept at the Aransas National Wildlife Refuge and other literature. Additional early records of captive whooping cranes in Europe were discovered. Annual numbers and location for all captive whooping cranes were tabulated. Starting in 1949, initial attempts at breeding the species in captivity were conducted opportunistically with a few injured birds captured from the wild. Acaptive breeding flock was started in 1966 at the Patuxent Wildlife Research Center in Laurel, Maryland, from second eggs collected in Canada from the only remaining wild flock. In 1989, the flock …
Changes In Winter Whooping Crane Territories And Range 1950–2006, Thomas V. Stehn, Felipe Prieto
Changes In Winter Whooping Crane Territories And Range 1950–2006, Thomas V. Stehn, Felipe Prieto
Proceedings of the North American Crane Workshop
The whooping crane (Grus americana) winters on the Texas coast primarily in salt marsh habitat. The location of adult whooping crane winter territories during 9 winters between 1950 and 2006 was derived from aerial census data digitized onto infrared photos using GIS software. Range expansion, including changes in distribution and size of winter territories, was analyzed over a 57-year period as flock size increased by 765%. Crane pairs have opted to establish territories in or close to the traditional winter area rather than moving long distances along the coast. This distribution seems based on the preference of the …
Thirty Years Of Mortality Assessment In Whooping Crane Reintroductions: Patterns And Implications, Barry K. Hartup, Marilyn G. Spalding, Nancy J. Thomas, Gretchen A. Cole, Young Jun Kim
Thirty Years Of Mortality Assessment In Whooping Crane Reintroductions: Patterns And Implications, Barry K. Hartup, Marilyn G. Spalding, Nancy J. Thomas, Gretchen A. Cole, Young Jun Kim
Proceedings of the North American Crane Workshop
We reviewed postmortem data to identify primary causes of mortality in reintroduced whooping cranes (Grus americana) and assess their potential for mitigation in future reintroduction efforts. In total, 240 cases from 3 populations were reviewed for causes of death, including the Rocky Mountain migratory population (n = 24, release dates 1975-1989), the Florida resident population (n = 186, 1993-2005), and the Wisconsin migratory population (n = 30, 2001-ongoing). Traumatic injury was the leading cause of mortality among the reintroduced whooping cranes, most commonly from predation (n = 120 or 50%, range 8-58% per project) or collision with fixed …
Demography Of Whooping Cranes In The Eastern Migratory Population, Sarah J. Converse, Richard P. Urbanek
Demography Of Whooping Cranes In The Eastern Migratory Population, Sarah J. Converse, Richard P. Urbanek
Proceedings of the North American Crane Workshop
The ultimate success of the whooping crane (Grus americana) reintroduction to eastern North America rests on adequate demographic performance of the population. We are undertaking a population viability analysis (PVA) of the eastern migratory population in order to evaluate progress toward the fundamental population objective, to better understand the critical demographic thresholds that must be met to fulfill this objective, and, most importantly, to support management decision-making. The initial phase in the PVA development process involves estimation of demographic parameters to be used in later population modeling phases. Multi-state models provide an appropriate analytic framework for estimation, wherein …
Migration Patterns And Movements Of Sandhill Cranes Wintering In Central And Southwestern Louisiana, Sammy L. King, Aaron R. Pierce, Kent R. Hersey, Nicholas Winstead
Migration Patterns And Movements Of Sandhill Cranes Wintering In Central And Southwestern Louisiana, Sammy L. King, Aaron R. Pierce, Kent R. Hersey, Nicholas Winstead
Proceedings of the North American Crane Workshop
In this study we trapped wintering sandhill cranes (Grus canadensis) in Louisiana and fitted them with satellite transmitters to determine their migration routes. Four of the 6 sandhill cranes with validated locations and a terminus point used the Central Flyway for spring migration; 2 of these 4 (the only 2 for which we have data) also used the Central Flyway for fall migration. Two of the 6 birds used the Mississippi Flyway for spring migration. The results of this study suggest that reintroduced whooping cranes (G. americana) that intermix and migrate with sandhill cranes that winter …
Aerial Survey Techniques For Breeding Whooping Cranes, Brian W. Johns
Aerial Survey Techniques For Breeding Whooping Cranes, Brian W. Johns
Proceedings of the North American Crane Workshop
Since the discovery of nesting whooping cranes in Wood Buffalo National Park, the Canadian Wildlife Service has conducted aerial surveys to monitor the population. Aerial survey techniques have varied over the years; however, they have generally followed the techniques used by the author since 1991. The technique involves flying a combination of circular flights and transects over known nesting territories and similar looking marshes likely to contain breeding whooping cranes. These aerial surveys account for nearly 100% of the breeding whooping cranes each year.
Whooping Crane Migrational Habitat Use Of The Platte River, Nebraska, 2001–2006, Shay Howlin, Clayton Derby, Dale Strickland
Whooping Crane Migrational Habitat Use Of The Platte River, Nebraska, 2001–2006, Shay Howlin, Clayton Derby, Dale Strickland
Proceedings of the North American Crane Workshop
The Platte River Endangered Species Partnership monitored whooping crane (Grus americana) habitat use along the Platte River between Chapman and Lexington, Nebraska during 11 migration seasons from 2001 to 2006. Daily aerial surveys took place in the morning from 21 March to 29 April in the spring and from 9 October to 10 November in the fall. Decoy detection trials were conducted during each of the 11 survey seasons to calculate actual sample inclusion probabilities for crane groups detected during monitoring flights. The detectability model found significant differences in detectability among strata (upland or channel), contractor, and altitude …
Development Of The Whooping Crane Tracking Project Geographic Information System, Martha Tacha, Andy Bishop, Justin Brei
Development Of The Whooping Crane Tracking Project Geographic Information System, Martha Tacha, Andy Bishop, Justin Brei
Proceedings of the North American Crane Workshop
The highest losses in the Aransas-Wood Buffalo whooping crane population occur during migration. Conservation and recovery of the endangered whooping crane requires understanding of migration patterns to identify important stopover areas and potential sources of mortality or disturbance. We converted the Cooperative Whooping Crane Tracking Project database, containing more than 3 decades of data on whooping crane sightings, to a geographic information system (GIS) to allow coarse scale spatial analyses of whooping crane migration patterns in the United States portion of the Central Flyway. At this writing, the geodatabase contains point data for 1,981 confirmed whooping crane sightings through the …
Winter Habitat Selection By A Reintroduced Population Of Migratory Whooping Cranes: Emerging Patterns And Implications For The Future, Lara E. A. Fondow
Winter Habitat Selection By A Reintroduced Population Of Migratory Whooping Cranes: Emerging Patterns And Implications For The Future, Lara E. A. Fondow
Proceedings of the North American Crane Workshop
In an effort to model the reintroduced eastern migratory population of whooping cranes (Grus americana) after the remaining wild whooping crane population, biologists selected the salt marshes of Chassahowitzka National Wildlife Refuge (NWR), Florida as the winter release site for ultra-light led juvenile cranes due to its similarities to Aransas NWR, Texas. Releases began in the fall of 2001, and the 3 subsequent winter seasons have afforded the opportunity to observe whether habitat selection by these whooping cranes would be influenced by the pre-selection of salt marsh. Intensive monitoring efforts each winter have revealed a dominant early-winter pattern. …
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 …
A Low Intensity Sampling Method For Assessing Blue Crab Abundance At Aransas National Wildlife Refuge And Preliminary Results On The Relationship Of Blue Crab Abundance To Whooping Crane Winter Mortality, Bruce H. Pugesek, Michael J. Baldwin, Thomas V. Stehn
A Low Intensity Sampling Method For Assessing Blue Crab Abundance At Aransas National Wildlife Refuge And Preliminary Results On The Relationship Of Blue Crab Abundance To Whooping Crane Winter Mortality, Bruce H. Pugesek, Michael J. Baldwin, Thomas V. Stehn
Proceedings of the North American Crane Workshop
We sampled blue crabs (Callinectes sapidus) in marshes on the Aransas National Wildlife Refuge, Texas from 1997 to 2005 to determine whether whooping crane (Grus americana) mortality was related to the availability of this food source. For four years, 1997 - 2001, we sampled monthly from the fall through the spring. From these data, we developed a reduced sampling effort method that adequately characterized crab abundance and reduced the potential for disturbance to the cranes. Four additional years of data were collected with the reduced sampling effort methods. Yearly variation in crab numbers was high, ranging …
Patterns Of Relationships Among Whooping Crane Fitness, Blue Crab Abundance, And Freshwater Inflows: An Exploratory Assessment Of Available Data Sets, Felipe Chavez-Ramirez
Patterns Of Relationships Among Whooping Crane Fitness, Blue Crab Abundance, And Freshwater Inflows: An Exploratory Assessment Of Available Data Sets, Felipe Chavez-Ramirez
Proceedings of the North American Crane Workshop
This paper evaluates the possible relationships of whooping crane (Grus americana) fitness parameters to blue crab abundance and freshwater inflows based on independently gathered data sets from several agencies between 1978 and 1999. I ordered all possible analysis models into two separate types based primarily on implied relationships. The 1st order exploratory relationship models were those where evaluated parameters were potentially affected by freshwater inflows, such as salinity and blue crab abundance. The 2nd order exploratory relationship models evaluated parameters that could, more directly, have potential affects on whooping crane fitness parameters for which there was data available. Freshwater inflow …
Historical Notes On Whooping Cranes At White Lake, Louisiana: The John J. Lynch Interviews, 1947–1948, Gay M. Gomez, Roderick C. Drewien, Mary Lynch Courville
Historical Notes On Whooping Cranes At White Lake, Louisiana: The John J. Lynch Interviews, 1947–1948, Gay M. Gomez, Roderick C. Drewien, Mary Lynch Courville
Proceedings of the North American Crane Workshop
In May 1939 biologist John J. Lynch of the U.S. Bureau of Biological Survey conducted an aerial survey that documented the existence of a non-migratory population of whooping cranes (Grus americana) near White Lake in southwest Louisiana. Lynch found 13 cranes, including 2 pre-fledged young, confirming breeding. Lynch’s survey occurred, in part, because fur trappers and alligator hunters working in the White Lake marshes had informed the biologist of the cranes’ presence and habits. Lynch continued his contacts with these knowledgeable marsh users, and in 1947 and 1948 interviewed at least 7 individuals. In 2001, M. L. Courville, …
Whooping Crane Titers To Eastern Equine Encephalitis Vaccinations, Glenn H. Olsen, Erin Kolski, Jeff S. Hatfield, Douglas E. Docherty
Whooping Crane Titers To Eastern Equine Encephalitis Vaccinations, Glenn H. Olsen, Erin Kolski, Jeff S. Hatfield, Douglas E. Docherty
Proceedings of the North American Crane Workshop
In 1984 an epizootic of eastern equine encephalitis (EEE) virus killed 7 of 39 (18%) whooping cranes in captivity at the Patuxent Wildlife Research Center in Laurel, Maryland, USA. Since that time whooping cranes have been vaccinated with a human EEE vaccine. This vaccine was unavailable for several years, necessitating use of an equine vaccine in the cranes. This study compared the antibody titers measured for three years using the human vaccine with those measured for two years using the equine form. Whooping cranes developed similarly elevated titers in one year using the human vaccine and both years using the …
Breeding Biology Of Re-Introduced Non-Migratory Whooping Cranes In Florida, Martin J. Folk, Stephen A. Nesbitt, Stephen T. Schwikert, James A. Schmidt, Kathleen A. Sullivan, Thomas J. Miller, Stephen B. Baynes, Jeannette M. Parker
Breeding Biology Of Re-Introduced Non-Migratory Whooping Cranes In Florida, Martin J. Folk, Stephen A. Nesbitt, Stephen T. Schwikert, James A. Schmidt, Kathleen A. Sullivan, Thomas J. Miller, Stephen B. Baynes, Jeannette M. Parker
Proceedings of the North American Crane Workshop
In the face of record-setting drought, the re-introduced flock of non-migratory whooping cranes in Florida has shown slow but steady progress toward achieving the first natural recruitment to the flock. Fourteen nests were initiated between 1999 and 2002. Two clutches have hatched a total of 4 chicks and 1 chick was raised to fledging. Captive-raised, soft-released whooping cranes have shown that they are capable of forming pair bonds, defending territories, building nests, laying fertile eggs, and hatching and rearing young. The key to the success of the project will be to have enough pairs producing enough young to offset annual …