Sandhill Crane Migration Chronology And Behavior In Northwestern Texas,
2010
Muleshoe, Texas
Sandhill Crane Migration Chronology And Behavior In Northwestern Texas, Carroll D. Littlefield
Proceedings of the North American Crane Workshop
Migrant lesser sandhill cranes (Grus canadensis canadensis) were monitored during 1990-2000 in northwestern Texas as flocks were arriving in autumn and departing in spring; cranes were counted as they passed over an observation point 23 km north of Sudan, Lamb County, Texas. Mean flock size was 34.5 (SD ± 32.6) in autumn and 58.2 (SD ± 45.0) in spring. Most autumn migrants (69.6%) passed in the afternoon, whereas in spring 94% migrated in the morning (1000-1200 hr). Peak period of autumn passage was in October (65%), and in spring all observations were in February-March with the peak usually …
Population Status And Geographic Distribution Of Greater Sandhill Cranes In The Mid-Continent Population,
2010
U.S. Geological Survey, Northern Prairie Wildlife Research Center
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 …
Migration Patterns And Movements Of Sandhill Cranes Wintering In Central And Southwestern Louisiana,
2010
Louisiana Cooperative Fish and Wildlife Research Unit, U.S. Geological Survey
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 …
Countability Of Sandhill Cranes In Aerial Surveys,
2010
USGS Northern Prairie Wildlife Research Center
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, …
Aerial Survey Techniques For Breeding Whooping Cranes,
2010
Canadian Wildlife Service
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,
2010
Western EcoSystems Technology, Inc.
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 …
Mississippi Sandhill Crane Conservation Update 2006–2008,
2010
U.S. Fish and Wildlife Service, Mississippi Sandhill Crane National Wildlife Refuge
Mississippi Sandhill Crane Conservation Update 2006–2008, Scott G. Hereford, Lauren E. Billodeaux
Proceedings of the North American Crane Workshop
The Mississippi sandhill crane (MSC, Grus canadensis pulla) is an endangered non-migratory subspecies found in the wild only on and near the Mississippi Sandhill Crane National Wildlife Refuge (MSCNWR) in Jackson County in southeastern Mississippi (Gee and Hereford 1995). The MSC is adapted to the wet pine savannas and open pinelands of the Southeastern Outer Gulf Coastal Plain. By the 1970s, their numbers had decreased to 30-40 individuals including only 5-6 nesting pairs. The firemaintained savannas, once a dominant feature of the landscape, were converted to pine plantations and human development or had degraded to overgrown pine scrub. The …
Development Of The Whooping Crane Tracking Project Geographic Information System,
2010
U.S. Fish and Wildlife Service
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 …
A Retrospective Serological Survey For Infectious Bursal Disease Virus In Free-Ranging Sandhill Cranes In South-Central Wisconsin,
2010
University of Wisconsin
A Retrospective Serological Survey For Infectious Bursal Disease Virus In Free-Ranging Sandhill Cranes In South-Central Wisconsin, Richard R. Sim, Barry K. Hartup
Proceedings of the North American Crane Workshop
A retrospective serosurvey of resident sandhill cranes (Grus candensis pratensis) in Florida suggested Infectious Bursal Disease Virus (IBDV, family Birnaviridae) may have been enzootic there as early as 1992, with 13-63% seroprevalence among age classes and wide geographic distribution of seropositive cranes. The purpose of our study was to describe the prevalence of antibodies to IBDV serotype 2 in a local population of greater sandhill cranes (G. c. tabida) near Briggsville, Wisconsin, that overlapped with resident Florida birds in winter during the same time period. Blood samples were collected June through October between 1996 and 1999 …
Summary Of Sandhill Crane Hunting Seasons In Kansas 1993–2007,
2010
U.S. Fish and Wildlife Service
Summary Of Sandhill Crane Hunting Seasons In Kansas 1993–2007, David E. Sharp, Helen M. Hands, James A. Dubovsky, John E. Cornely
Proceedings of the North American Crane Workshop
The mid-continent population of sandhill cranes (Grus canadensis) is the largest population of cranes in North America. Hunting seasons for sandhill cranes were closed in 1916 and gradually resumed in Mexico (1940), the United States (1961), and Canada (1964). As knowledge of the biology of cranes and experience with hunting seasons increased, areas in which hunting was permitted expanded, and by 1992 all but 2 states (Nebraska and Kansas) in the U.S. portion of the Central Flyway conducted sport hunting seasons for this population. In 1993 Kansas resumed hunting and initial seasons were limited to specified geographic areas of …
Proceedings Of The Eleventh North American Crane Workshop: Preface And Contents,
2010
University of Nebraska - Lincoln
Proceedings Of The Eleventh North American Crane Workshop: Preface And Contents
Proceedings of the North American Crane Workshop
The North American Crane Working Group (NACWG) is an organization of professional biologists, aviculturists, land managers, and other interested individuals dedicated to the conservation of cranes and their habitats in North America. Our group meets approximately every 3 years to exchange new information on research and conservation of sandhill and whooping cranes and occasionally reports from abroad. Our meeting in Wisconsin Dells, Wisconsin, 23-27 September 2008, was no exception. The workshop was ably organized by Tom Hoffman, the scientific program was well-constructed by Jane Austin, and George Archibald and Richard Urbanek helped to bring together a memorable field day in …
Wintering Sandhill Crane Distribution And Habitat Use Patterns At Bosque Del Apache National Wildlife Refuge, New Mexico,
2010
Wildlife and Fisheries Science
Wintering Sandhill Crane Distribution And Habitat Use Patterns At Bosque Del Apache National Wildlife Refuge, New Mexico, Tandi L. Perkins, Leigh H. Fredrickson
Proceedings of the North American Crane Workshop
The single most important factor regulating sandhill crane (Grus canadensis) populations is their ability to carry out annual life cycle events while responding to changing habitat availability and distribution across local, regional, and continental landscapes. Wetland and cropland resource availability and distribution across the landscape have become increasingly unpredictable. Recent changes in farming practices, urbanization, and prevailing drought conditions in New Mexico have transformed and reduced dynamic, heterogeneous landscapes into scattered fragments of the original setting. Concerns are increasing for the cumulative influence of these often irreversible actions in providing the type of resources needed by cranes at …
Prolonged Intensive Dominance Behavior Between Gray Wolves, Canis Lupus,
2010
USGS Northern Prairie Wildlife Research Center
Prolonged Intensive Dominance Behavior Between Gray Wolves, Canis Lupus, L. David Mech, H. Dean Cluff
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
Dominance is one of the most pervasive and important behaviors among wolves in a pack, yet its significance in free-ranging packs has been little studied. Insights into a behavior can often be gained by examining unusual examples of it. In the High Arctic near Eureka, Nunavut, Canada, we videotaped and described an unusually prolonged and intensive behavioral bout between an adult male Gray Wolf (Canis lupus) and a male member of his pack, thought to be a maturing son.With tail raised, the adult approached a male pack mate about 50 m from us and pinned and straddled this …
The Impact Of Conservation On The Status Of The World's Vertebrates,
2010
Old Dominion University
The Impact Of Conservation On The Status Of The World's Vertebrates, Michael Hoffmann, Craig Hilton-Taylor, Ariadne Angulo, Monika Böhm, Thomas M. Brooks, Stuart H. M. Butchart, Kent E. Carpenter, Janice Chanson, Beth A. Polidoro, Jonnell C. Sanciangco
Biological Sciences Faculty Publications
Using data for 25,780 species categorized on the International Union for Conservation of Nature Red List, we present an assessment of the status of the world's vertebrates. One-fifth of species are classified as Threatened, and we show that this figure is increasing: On average, 52 species of mammals, birds, and amphibians move one category closer to extinction each year. However, this overall pattern conceals the impact of conservation successes, and we show that the rate of deterioration would have been at least one-fifth again as much in the absence of these. Nonetheless, current conservation efforts remain insufficient to offset the …
Carbon Dynamics In A Phragmites Australis Invaded Riparian Wetland,
2010
University of Nebraska-Lincoln
Carbon Dynamics In A Phragmites Australis Invaded Riparian Wetland, Steven Walters
School of Natural Resources: Dissertations, Theses, and Student Research
Invasive plant species are widely recognized as a major threat to biodiversity and ecosystem stability. Wetland ecosystems tend to be much more susceptible to invasions because of their location on the landscape where water, nutrients, and the impacts of disturbances accumulate. Invasive plants have the ability to alter ecosystem processes and community/population dynamics. The ability of invasive plants to alter these processes can have profound economic consequences. In the United States, control of invasive wetland species alone costs approximately 155 million dollars annually. The state of Nebraska spends 2 million dollars annually controlling invasive plant species in the Platte River …
Retention, Movement, And The Biotic Response To Large Woody Debris In The Channelized Missouri River,
2010
University of Nebraska-Lincoln
Retention, Movement, And The Biotic Response To Large Woody Debris In The Channelized Missouri River, Michael W. Archer
School of Natural Resources: Dissertations, Theses, and Student Research
Large woody debris (LWD) is an important component of a healthy aquatic ecosystem. However, little is known about the dynamics of LWD in a large, channelized river such as the Missouri River. My objectives were to first, assess the abundance of LWD found along the channelized portion of the Missouri River. Second, I documented movement of LWD that entered the river. Lastly, using PRIMER software I analyzed what effect, if any, river segments, bend types, and LWD had on the community composition of the macroinvertebrate and fish that inhabit the river. Abundance of LWD was greater along bends that have …
Ecology Of Mayfly (Insecta : Ephemeroptera) Nymphs In Three Streams Of Ulu Gombak Forest Reserve, Peninsular Malaysia.,
2010
Universiti Malaya
Ecology Of Mayfly (Insecta : Ephemeroptera) Nymphs In Three Streams Of Ulu Gombak Forest Reserve, Peninsular Malaysia., Sree Gayathree Selvantharan
Student Works (2010-2019)
Three sampling stations with various environmental quality gradients in Ulu Gombak Forest Reserve, Selangor, Peninsular Malaysia were selected in this study: Sungai Gombak, Anak Sungai Gombak and Sungai Batu 19. A total of six genera of ephemeropteran nymphs were found from the mentioned streams: Baetis sp. (Baetidae) (232), Thalerosphyrus sp. (Heptageniidae) (925), Campsoneuria sp. (Heptageniidae) (1432), Neurocaenis sp. (Tricorythidae) (471), Platybaetis sp. (Baetidae) (12) and Prosopistoma sp. (Prosopistomatidae) (1). The most dominant family of ephemeropteran nymphs is Heptageniidae while Neurocaenis sp. (Tricorythidae) were the only nymphs that showed significant difference in abundance between all three streams (p=0.05) using student t-test. …
Water Quality Study Of Paya Indah Wetlands.,
2010
Universiti Malaya
Water Quality Study Of Paya Indah Wetlands., Ridzuan Ahmad
Student Works (2010-2019)
A study had been carried out on Paya Indah Wetlands’ water quality from December 2006 to February 2007. This was to determine the status of water quality. From the analysis on Water Quality Index (WQI) at 15 sampling stations, it was observed that WQI of Paya Indah at most stations were within polluted range. From the comparative study made on WQI at major lakes and canals between year 1996 and 2006/2007, it was observed that Canal C2 and Canal C4 show slight improvement (48.7 – 50.0 and 41.5 – 59.2 respectively). However, major lakes of Paya Indah shows decrease of …
Biofouling And Short-Term Dynamics On Fish Cage Netting In Relation To Fish Rearing And Environmental Factors.,
2010
Universiti Malaya
Biofouling And Short-Term Dynamics On Fish Cage Netting In Relation To Fish Rearing And Environmental Factors., John Madin
Student Works (2010-2019)
Four studies were conducted in a floating net-cages farm at Matang Mangrove Forest Reserve (MMFR), Perak, Malaysia, to elucidate the biofouling assemblages on cage nettings and factors that influence their development. In the first study (Chapter 3),biofouling on 1.6 cm mesh net panels (size 0.2 m x 2 m) suspended inside (homemade pellet ‘P’, trash fish ‘T’) and outside (O) experimental net-cages in a fish farm were monitored every week until net openings were completely occluded by macrofouling organisms. Eight species (7 phyla) of sessile organisms and 27 species (3 phyla) of nonsessile associates were recorded.Colonization by macrofouling organisms usually …
Lobster Attack Induces Sensitization In The Sea Hare, Aplysia Californica,
2010
Chapman University
Lobster Attack Induces Sensitization In The Sea Hare, Aplysia Californica, Amanda J. Watkins, Daniel A. Goldstein, Lucy C. Lee, Christina J. Pepino, Scott L. Tillett, Francis E. Ross, Elizabeth M. Wilder, Virginia A. Zachary, William G. Wright
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Studies of the neural mechanisms of learning, especially of sensitization, have benefitted from extensive research on the model species, Aplysia californica (hereafter Aplysia). Considering this volume of literature on mechanisms, it is surprising that our understanding of the ecological context of sensitization in Aplysia is completely lacking. Indeed, the widespread use of strong electric shock to induce sensitization (an enhancement of withdrawal reflexes following noxious stimulation) is completely unnatural and leaves unanswered the question of whether this simple form of learning has any ecological relevance. We hypothesized that sublethal attack by a co-occurring predator, the spiny lobster, Panulirus interruptus, might …
