Index Catalog // ScholarsArchive@OSU

Development and Operation of a Self-Refueling Compressed Natural Gas Vehicle

Creator:: Elgin, Robert C., III and Hagen, Christopher L.
Abstract:: A dual-mode engine has been developed where in one mode all engine cylinders fire normally, providing locomotion for the vehicle. In the other mode, one cylinder of the engine is used to compress low pressure residential natural gas (NG), in multiple stages, to a standard U.S. compressed natural gas (CNG)...
Resource Type:: Article
Full Text:: a Self-Refueling1 Compressed Natural Gas Vehicle2 Robert C. Elgin III, Christopher L. Hagen∗3

An Observation of Clostridium perfringens in Greater Sage-Grouse

Creator:: Hagen, Christian A. and Bildfell, Robert J.
Abstract:: Mortality due to infectious diseases is seldom reported in the Greater Sage-Grouse (Centrocercus urophasianus). A case of necrotic enteritis associated with Clostridium perfringens type A is described in a free-ranging adult male sage-grouse in eastern Oregon. Clostridial enteritis is known to cause outbreaks of mortality in various domestic and wild...
Resource Type:: Article
Full Text:: mortality in the Western bluebird (Sialia mexicana). Avian Dis- eases 45: 760–763. HAGEN, C. A., S. S

Paleoceanography of the Eastern Equatorial Pacific during the Neogene : synthesis of Leg 138 drilling results

Creator:: Pisias, Nicklas G., Mayer, Larry A., and Mix, Alan C.
Abstract:: The primary objective of Leg 138 was to provide detailed information about the ocean's response to global climate change during the Neogene. Two north south transects were drilled (95° and 110°W) within the region of equatorial divergence driven upwelling (and thus high accumulation rates and resolution) and spanning the major...
Resource Type:: Article
Full Text:: equator. A SYNTHESIS OF LEG 138 DRILLING RESULTS 20°N J 20c 160°W 140c 120 1OO C Figure 1. General

A meta-analysis of greater sage-grouse Centrocercus urophasianus nesting and brood rearing habitat

Creator:: Hagen, Christian A., Connelly, John W., and Schroeder, Michael A.
Abstract:: The distribution and range of the greater sage-grouse Centrocercus urophasianus have been reduced by 56% since the European settlement of western North America. Although there is an unprecedented effort to conserve the species, there is still considerable debate about the vegetation composition and structure required for nesting and brood-rearing habitat....
Resource Type:: Article
Full Text:: urophasianus nesting and brood-rearing habitats Christian A. Hagen, John W. Connelly & Michael A. Schroeder

Niche partitioning by lesser prairie-chickens Tympanuchus pallidicinctus and ring-necked pheasants Phasianus colchicus in southwestern Kansas.

Creator:: Hagen, Chrisitan A., Pitman, James C., Robel, Robert J., Loughin, Thomas M., and Applegate, Roger D.
Abstract:: We conducted this 2-year study to determine if lesser prairie-chickens Tympanuchus pallidicinctus and ring-necked pheasants Phasianus colchicus used the same habitats where their ranges overlapped in southwestern Kansas. Telemetry locations of 50 transmitter-equipped lesser prairie-chickens and 28 pheasants were used to monitor habitat use by the two species. Additionally, vegetation...
Resource Type:: Article
Full Text:: -chickenTympanuchuspallidicinctus and ring-necked pheasant Phasianus colchicus in southwestern Kansas Christian A. Hagen, James C

Lesser prairie-chicken brood habitat in sand sagebrush: invertebrate biomass and vegetation

Creator:: Hagen, Christian A., Salter, G. Curran, Pitman, James C., Robel, Robert J., and Applegate, Roger D.
Abstract:: Invertebrates are an important food source for grouse chicks, especially within the first 2 weeks of life. Invertebrate abundance is highly patchy and dependent upon herbaceous cover and vegetation structure. We examined the relationship between invertebrate biomass (from sweepnet samples) and habitat structure at lesser prairie-chicken (Tympanuchus pallidicinctus) brood-use and...
Resource Type:: Article
Full Text:: abundance is highly patchy and dependent Address for Christian A. Hagen, C. Curran Salter, James C. Pitman

Age-specific variation in apparent survival rates of male lesser-prairie-chickens

Creator:: Hagen, Christian A., Pitman, James C., Sandercock, Brett K., Robel, Robert J., and Applegate, Roger D.
Abstract:: We used mark-recapture methods to estimate age-specific apparent survival rates for male Lesser Prairie-Chickens (Tympanuchus pallidicinctus), a gamebird of conservation concern. A total of 311 male prairie-chickens (135 yearlings, 176 adults) were captured and banded during a 5-year study in southwest Kansas. Time-since-marking models were used to estimate apparent survival...
Resource Type:: Article
Full Text:: . MARSHALL. 1968. Survival of Ruffed Grouse in a boreal forest. The Living Bird 7:117–167. HAGEN, C. A. 2003

Gender identification and growth of juvenile lesser prairie-chickens

Creator:: Pitman, James C., Hagen, Christian A., Robel, Robert J., Loughlin, Thomas M., and Applegate, Roger D.
Abstract:: The ability to ascertain gender and age of juvenile grouse is essential for determining gender-specific population age structure and studying timing of reproductive events, respectively. We examined outer rectrix feathers from juvenile Lesser Prairie-Chickens (Tympanuchus pallidicinctus) captured at 30–40 and 50–60 days post-hatching. Blood samples were collected from most chicks...
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Full Text:: , N. J., AND C. A. HAGEN. 2004. Introduction: man- agement of imperiled prairie grouse species and

Habitat Selection by Greater Sage-Grouse During Winter in Southeastern Oregon

Creator:: Hagen, Christian A., Willis, Mitchell J., Glenn, Elizabeth M., and Anthony, Robert G.
Abstract:: The distribution and geographic range of Greater Sage-Grouse (Centrocercus urophasianus) have been reduced by 56% since European settlement. Although loss and fragmentation of sagebrush (Artemisia spp.) habitats have been cited as the primary causes for the decline of the species, degradation of existing habitat also has been considered an important...
Resource Type:: Article
Full Text:: us e at J ac k C re ek , H ar t M ou nt ai n N at io na l A nt el op e R ef ug e

Habitat selection by Greater Sage-Grouse during winter in southeastern Oregon

Creator:: Hagen, Christian A., Willis, Mitchell J., Glenn, Elizabeth M., and Anthony, Robert G.
Abstract:: The distribution and geographic range of Greater Sage-Grouse (Centrocercus urophasianus) have been reduced by 56% since European settlement. Although loss and fragmentation of sagebrush (Artemisia spp.) habitats have been cited as the primary causes for the decline of the species, degradation of existing habitat also has been considered an important...
Resource Type:: Article
Full Text:: ro us e at J ac k C re ek , H ar t M ou nt ai n N at io na l A nt el op e R ef ug

ScholarsArchive@OSU

Development and Operation of a Self-Refueling Compressed Natural Gas Vehicle

An Observation of Clostridium perfringens in Greater Sage-Grouse

Paleoceanography of the Eastern Equatorial Pacific during the Neogene : synthesis of Leg 138 drilling results

A meta-analysis of greater sage-grouse Centrocercus urophasianus nesting and brood rearing habitat

Niche partitioning by lesser prairie-chickens Tympanuchus pallidicinctus and ring-necked pheasants Phasianus colchicus in southwestern Kansas.

Lesser prairie-chicken brood habitat in sand sagebrush: invertebrate biomass and vegetation

Age-specific variation in apparent survival rates of male lesser-prairie-chickens

Gender identification and growth of juvenile lesser prairie-chickens

Habitat Selection by Greater Sage-Grouse During Winter in Southeastern Oregon

Habitat selection by Greater Sage-Grouse during winter in southeastern Oregon

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