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Results 351 - 400 of 634
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Harbour, Lori - - 2012
Abdominal apoplexy, or idiopathic spontaneous intraperitoneal hemorrhage, is a rare and often fatal condition resulting from a variety of disease processes affecting the arterial and venous abdominal vasculature. Preoperative and intraoperative diagnosis and treatment of abdominal apoplexy are challenging. The source of bleeding may remain elusive even after careful autopsy ...
Roberts, William - - 2012
Cooper, David - - 2012
Cross-species transplantation (xenotransplantation) offers the prospect of an unlimited supply of organs and cells for clinical transplantation, thus resolving the critical shortage of human tissues that currently prohibits a majority of patients on the waiting list from receiving transplants. Between the 17th and 20th centuries, blood was transfused from various ...
Cook, Alan - - 2012
Ground-level falls (GLFs) are the leading cause of nonfatal hospitalized injuries in the US. We hypothesized that risk-adjusted mortality would not vary between levels of trauma center verification if regional triage functioned appropriately. Data were collected from our regional trauma registry for the years 2001 through 2009. A multilevel mixed-effects ...
Cao, Ying - - 2012
Primary angiosarcoma of the breast is a rare malignant tumor. We report a case of breast primary cutaneous angiosarcoma in a patient with a strong family history of malignancy. For definitive diagnosis, a tissue biopsy is needed, with immunostaining for the presence of blood vessel endothelial markers CD31 and CD34. ...
Burch, Micah - - 2012
Heparin-induced thrombocytopenia (HIT) is an immune-mediated clinical syndrome of thrombocytopenia and thrombosis occurring after exposure to heparin. HIT most commonly occurs after exposure to unfractionated heparin but has also been reported with low-molecular-weight heparin. To date, there have been very few reports of HIT with the pentasaccharide fondaparinux, and some ...
Abramson, Amanda - - 2012
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Sacks, Sharon - - 2012
Geruschat, Duane - - 2012
Smith, Kathryn - - 2012
We describe the removal (predation) of a black-capped vireo (Vireo atricapilla) nestling by a female greater arid-land katydid (Neobarrettia spinosa) in southwest Texas. The event was captured with a nest camera during night in Jun. 2010. Neobarrettia species are known to be aggressive and carnivorous, but this is the first ...
Nowak, Josh - - 2012
Fruits and their seeds are ingested by many carnivores, but few studies have quantified the effect of ingestion by carnivorous consumers on seed germination. Here, we examine effects of bear frugivory on the germination of three fruit-producing species. Specifically, we compare germination of gut-passed seeds to that of seeds mechanically-extracted ...
Tessler, Nate - - 2012
The eastern sand darter (Ammocrypta pellucida Agassiz) is a small (<7 cm) bottom dwelling fish that inhabits rivers with clean sand substrates. Siltation and degradation of its riverine habitat caused the species to become rare throughout its entire range, a geographic area originally extending from the St. Lawrence River and ...
Bloomquist, Craig - - 2012
Few researchers have used radiotelemetry to study spatial organization in beavers (Castor canadensis) given limitations in available radio-attachment methods for the species. During Mar. 2005-Sept. 2006, we attached tail-mounted transmitters to 46 beavers from 10 colonies in an unexploited beaver population in southern Illinois. We used radiotelemetry to quantify sizes ...
White, P.J. - - 2012
Changes in ungulate distribution can alter competitive interactions, plant communities, risks of zoonotic disease transmission, and availability of animals for harvest. We used annual aerial survey data for northern Yellowstone elk in Montana and Wyoming, USA to evaluate factors influencing distribution and group sizes during 1987- 2009 in four sectors ...
Kolar, Jesse - - 2012
In many pronghorn populations there exists uncertainty about which factors most affect survival rates. Also, although pronghorn within the same population might exhibit both migratory and non-migratory behaviors, few studies have assessed whether migration status affects survival rates. We determined cause-specific mortality for 134 adult, radio-tagged pronghorn in southwestern North ...
Lyman, R. - - 2012
Rodent prey contained in two temporally distinct collections of Barn Owl (Tyto alba) pellets from the same roost in southeastern Washington state (USA) differ in terms of taxonomic abundances. Deer mice (Peromyscus maniculatus) dominate the fauna in the pellet sample deposited while much of the landscape was productive wheat field, ...
Master, Terry - - 2012
Streamers of hanging plant debris (nest tails) are commonly used for nest concealment by tropical Tyrannid flycatchers. Of the 35 species of Tyrmmid flycatchers that regularly occur in temperate North America, only the Acadian flycatcher (Empidonax virescens) retains use of nest tails. To better understand the prevalence and possible function ...
Capper, Christie-Leigh - - 2012
Red-winged Blackbirds (Agelaius phoeniceus) may be more likely to desert nests parasitized by Brown-headed Cowbirds (Molothrus ater) when they interact with the parasite, because desertion frequencies are higher at naturally parasitized nests than at artificially parasitized nests in some brood-parasitic hosts. We experimentally parasitized blackbird nests in southern Manitoba with ...
Perkin, Joshuah - - 2012
Ironcolor shiner Notropis chalybaeus is generally absent from groundwater- dominated systems throughout its range; however, a relict disjunct population occurs within the spring-fed upper reaches of the San Marcos River in central Texas. We conducted monthly seine collections within the restricted 2.2 km headwater range of the species to assess ...
Schultz, Luke - - 2012
The extirpation of native fishes is a major concern in North America, and an understanding of population trends of imperiled fishes is critical to their management and conservation. Mountain sucker Catostomus platyrhynchus is a stream fish native to the Intermountain Region of western North America, and populations in the Black ...
Davis, V. - - 2012
The fluted kidneyshell Ptychobranchus subtentum (Say, 1825) is a candidate for listing under the Endangered Species Act by the US Fish and Wildlife Service. Fecundity, fish hosts, and selected population demographics were determined during 2005-2006 for the fluted kidneyshell in the upper Clinch River, Hancock County, Tennessee. Females were fertilized ...
Scott, Susanna - - 2012
Leaf detritus in streams fills dual resource roles as habitat and as food. Unless retained by some structural component, detritus gets transported to downstream reaches out of the local system. Low gradient sandy-bottomed streams retain leaf' detritus via burial in sand, but this mechanism of retention limits the availability of ...
Smith, Matthew - - 2012
A study was conducted to characterize termite colonies on the Nature Conservancy's Tallgrass Prairie Preserve Cross Timbers habitat in northeastern Oklahoma. The two test sites were established on a prescribed-burn area and no-burn area of the Cross Timbers habitat. Termites were identified through both morphological and molecular analyses. Foraging areas ...
Bragg, Don - - 2012
Comprised of largely non-commercial, xeric, oak-dominated forests, the Cross Timbers in Arkansas have been heavily altered over the last two centuries, and thus only scattered parcels of old-growth timber remain. We inventoried and mapped two such stands on Fort Chaffee Military Training Center in Sebastian County, Arkansas. The west-facing Christmas ...
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