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2005

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Articles 91 - 101 of 101

Full-Text Articles in Population Biology

International Crane Foundation Sponsored Environmental Education: Conservation Of The Cuban Sandhill Crane, Korie M. Klink Jan 2005

International Crane Foundation Sponsored Environmental Education: Conservation Of The Cuban Sandhill Crane, Korie M. Klink

Proceedings of the North American Crane Workshop

The International Crane Foundation (ICF) has supported crane conservation, education and research activities in Cuba since 1995. Groups of American educators and researchers visit the island, contributing to annual crane festivals, school activities, survey work, assessments and cross-cultural communication. The goals of ICF’s environmental education program in Cuba are to: Disseminate information about ICF and crane conservation to American and Cuban educators and students, and to empower them to carry on ICF’s mission in their classrooms and communities; Participate actively in the Cuban Crane Festival while interacting with and supporting Cuban educators, biologists, and professionals; Develop activities, educational programs and …

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Genetic Assessment Of Non-Migratory Sandhill Crane Populations, K. L. Jones, F. Chavez-Ramirez, X. Galvez-Aguilera, L. Torella, M. V. Ashley Jan 2005

Genetic Assessment Of Non-Migratory Sandhill Crane Populations, K. L. Jones, F. Chavez-Ramirez, X. Galvez-Aguilera, L. Torella, M. V. Ashley

Proceedings of the North American Crane Workshop

Partial migration, the tendency of a segment of a population to remain resident while others migrate between their seasonal breeding and wintering ranges, is well known for many bird species. The objective of this study is to quantify the population structure and historical and recent gene flow patterns among non-migratory sandhills using microsatellite DNA genotyping of a large number of sandhills collected from six populations; and to assess if the population subdivisions are consistent with theories of partial migration. Our results indicate a complex web of gene flow within non-migratory populations, as well as between migratory and non-migratory populations. Gene …

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Proceedings Of The Ninth North American Crane Workshop, January 17–20, 2003, Table Of Contents Jan 2005

Proceedings Of The Ninth North American Crane Workshop, January 17–20, 2003, Table Of Contents

Proceedings of the North American Crane Workshop

No abstract provided.

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Reintroduction Techniques: Post-Release Performance Of Sandhill Cranes (1) Released Into Wild Flocks And (2) Led On Migration By Ultralight Aircraft, Richard P. Urbanek, Joseph W. Duff, Scott R. Swengel, Lara E. A. Fondow Jan 2005

Reintroduction Techniques: Post-Release Performance Of Sandhill Cranes (1) Released Into Wild Flocks And (2) Led On Migration By Ultralight Aircraft, Richard P. Urbanek, Joseph W. Duff, Scott R. Swengel, Lara E. A. Fondow

Proceedings of the North American Crane Workshop

Two methods of reintroducing a migratory population of whooping cranes (Grus americana) were tested with costume/ isolation-reared juvenile greater sandhill cranes (G. canadensis tabida): (1) release into wild flocks during autumn staging and (2) leading on autumn migration by ultralight aircraft. Birds in the first group were released singly, and all integrated quickly into the wild flocks and adopted similar behavioral patterns. Birds in the second group were led to winter on an inland site on the Gulf Coast of Florida. Most of the birds led by ultralight aircraft remained in their juvenile cohort through the …

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Sandhill Crane Use Of Managed Chufa Wetlands In New Mexico, John P. Taylor, Loren M. Smith Jan 2005

Sandhill Crane Use Of Managed Chufa Wetlands In New Mexico, John P. Taylor, Loren M. Smith

Proceedings of the North American Crane Workshop

Natural wetland food plants help meet energetic requirements for sandhill cranes (Grus canadensis). Chufa (Cyperus esculentus) tubers were found to be a prominent item in the winter diet of cranes in New Mexico and Texas. In 1996 and 1997, chufa production was compared among mowing, discing, and sustained-flooding treatments intended to enhance chufa tuber growth. Sandhill crane numbers were monitored on wetlands during winter flooding to determine treatment preferences. No differences in sandhill crane use of treated wetlands were found in 1996, however in 1997, crane use was higher on disked field than sustained flood fields …

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An Adaptive Approach To Channel Management On The Platte River, Kent Pfeiffer, Paul Currier Jan 2005

An Adaptive Approach To Channel Management On The Platte River, Kent Pfeiffer, Paul Currier

Proceedings of the North American Crane Workshop

The mission of the Platte River Whooping Crane Maintenance Trust is to protect and manage habitat in the Platte valley for whooping cranes, sandhill cranes, and other migratory birds. The plan for meeting this mission calls for the creation and maintenance of eleven habitat complexes distributed through the central Platte valley. Each habitat complex is intended to consist of 1,000 ha of wet meadows and adjacent roost habitat of open, unvegetated river channel. Reduced flows in the river have caused its channel to narrow with banks that are often heavily wooded. Formerly mobile sand bars have stabilized and support dense …

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Migration Chronology, Routes, And Distribution Of Pacific Flyway Population Lesser Sandhill Cranes, Michael J. Petrula, Thomas C. Rothe Jan 2005

Migration Chronology, Routes, And Distribution Of Pacific Flyway Population Lesser Sandhill Cranes, Michael J. Petrula, Thomas C. Rothe

Proceedings of the North American Crane Workshop

Managers of migratory game birds require accurate information about bird movements to delineate populations, protect important habitats, and regulate harvest. Data describing movements of sandhill cranes (Grus canadensis) belonging to the Pacific Flyway Population (PFP) are lacking. We used satellite telemetry to monitor movements of PFP lesser sandhill cranes (Grus c. canadensis) captured in the upper Cook Inlet and Bristol Bay regions of Alaska. Satellite transmitters were deployed on 19 flightless young (colts) and 3 adults over 3-years (2000-2002). Chronology, routes, and stopover or staging areas were identified for fall and spring migration periods. On average, …

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Ecology Of The Missouri River. Progress Report, Dingell-Johnson Project F-75-R-23, Supplement I - Missouri River Creel Survey, Bellevue To Camp Creek, 2 April Through 14 October 2005, Gerald Mestl Jan 2005

Ecology Of The Missouri River. Progress Report, Dingell-Johnson Project F-75-R-23, Supplement I - Missouri River Creel Survey, Bellevue To Camp Creek, 2 April Through 14 October 2005, Gerald Mestl

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

This report describes Missouri River activities and results related to a channelized Missouri River creel survey conducted from 2 April through 14 October 2005. This is the sixth of a planned annual creel survey to be conducted on alternating sections of the channelized Missouri River to measure changes in recreational fishing activity, especially those changes due to large scale habitat restoration efforts. We returned to the Bellevue to Camp Creek reach in 2005 because we had to cancel the creel on this reach in 2004 after the second creel period due to lack of personnel. Future reports will contain additional …

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Are Leptodactylus Didymus And L. Mystaceus Phylogenetically Sibling Species (Amphibia, Anura, Leptodactylidae)?, Rafael O. De Sá, W. R. Heyer, Arley Camargo Jan 2005

Are Leptodactylus Didymus And L. Mystaceus Phylogenetically Sibling Species (Amphibia, Anura, Leptodactylidae)?, Rafael O. De Sá, W. R. Heyer, Arley Camargo

Biology Faculty Publications

The Leptodactylus fuscus species group consists of 25 currently recognized species; within this species group and distributed throughout the Amazon Basin, Atlantic Forests, Gran Chaco, and cerrados is the L. mystaceus species complex. This species complex consists of L. didymus, L. elenae, L. mystaceus, L. notoaktites, and L. spixi. Adult morphologies have been used to distinguish these species from each other except for L. didymus and L. mystaceus (Heyer, 1978; Heyer et al., 1996). Leptodactylus didymus and L. mystaceus are morphologically indistinguishable; the species are recognizable only by the characteristics of their advertisement calls: non-pulsed in L. didymus and pulsed …

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Common Names For The Frog Genus Leptodactylus (Amphibia, Anura, Leptodactylidae), Ulisses Caramaschi, Rafael O. De Sá, W. Ronald Heyer Jan 2005

Common Names For The Frog Genus Leptodactylus (Amphibia, Anura, Leptodactylidae), Ulisses Caramaschi, Rafael O. De Sá, W. Ronald Heyer

Biology Faculty Publications

Most species of the frog genus Leptodactylus lack common names. Common names are those names used by different human cultures and societies for the species of animals and plants where humans and biota reside together. Often times common names are lacking for Neotropical frogs or are broad in scope. For example, indigenous people may have a single name for frogs that occur on the ground and another name for frogs that occur in shrubs and trees, even though there are many species of ground frogs called by the same name as well as for the tree frogs. Sometimes colonists have …

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Crisis Global De Biodiversidad: Importancia De La Diversidad Genética Y La Extinción De Anfibios, Rafael O. De Sá Jan 2005

Crisis Global De Biodiversidad: Importancia De La Diversidad Genética Y La Extinción De Anfibios, Rafael O. De Sá

Biology Faculty Publications

El mundo enfrenta, por primera vez desde el comienzo de la civilización, el declive y la extinción de una clase de vertebrados, los anfibios. Esta extinción aparenta ser un evento global y de la magnitud que llevó a la desaparición de los dinosaurios. Muchas son las posibles causas de esta extinción y el efecto combinado de estos factores agravan la situación. La pérdida de ambientes naturales permanece como el factor más crítico en el declive de anfibios, pero enfermedades infecciosas emergentes parecen ser responsables de mortalidades masivas en décadas recientes. El declive y extinción de anfibios representa una llamada urgente …

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