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Year Published: 2006

Correlated growth and survival of juvenile spectacled eiders: Evidence of habitat limitation?

We studied the growth and survival of Spectacled Eider (Somateria fischeri) ducklings to 30 days of age along the lower Kashunuk River on the Yukon-Kuskokwim Delta from 1995 to 2000. We replicated this study at a second site, Kigigak Island, in 1999 and 2000. Age-adjusted estimates of duckling mass and survival at 30 days posthatching were highly...

Flint, Paul L.; Morse, Julie A.; Grand, James B.; Moran, Christine L.
Correlated growth and survival of juvenile spectacled eiders: Evidence of habitat limitation?; 2006; Article; Journal; Condor; Flint, P. L.; Morse, J. A.; Grand, J. B.; Moran, C. L.

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Year Published: 2006

Modeling spatial and temporal variations in temperature and salinity during stratification and overturn in Dexter Pit Lake, Tuscarora, Nevada, USA

This paper examines the seasonal cycling of temperature and salinity in Dexter pit lake in arid northern Nevada, and describes an approach for modeling the physical processes that operate in such systems. The pit lake contains about 596,200 m3 of dilute, near neutral (pHs 6.7–9) water. Profiles of temperature, conductivity, and selected...

Balistrieri, Laurie S.; Tempel, R.N.; Stillings, L.L.; Shevenell, L.A.

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Year Published: 2005

Non-lethal estimation of body composition of Yukon River salmon

Because of the importance of Chinook salmon to commercial and subsistence fisheries on the Yukon River, further study of the factors that may affect the success of this species and our ability to manage the fisheries is warranted. Critical to these studies is the determination of the amount of lipids (fat) stored and available to the fish as its...

Margraf, F. Joseph; Hartman, Kyle J.; Cox, M. Keith

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Year Published: 2005

Central Arctic caribou and petroleum development: Distributional, nutritional, and reproductive implications

We synthesize findings from cooperative research on effects of petroleum development on caribou (Rangifer tarandus granti) of the Central Arctic Herd (CAH). The CAH increased from about 6000 animals in 1978 to 23000 in 1992, declined to 18 000 by 1995, and again increased to 27 000 by 2000. Net calf production was consistent with changes in herd...

Cameron, Raymond D.; Smith, Walter T.; White, Robert G.; Griffith, Brad

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Year Published: 2005

First record of the plains minnow, Hybognathus placitus, in Canada

Seven Plains Minnows, Hybognathus placitus, Family Cyprinidae, were collected on 11 June 2003 from Morgan Creek, in Grasslands National Park, Saskatchewan, Canada. This collection is the first record of the species in Canada and extends the northern distribution limit of the species. Of 95 Hybognathus spp. collected at the site,...

Sylvester, R. M.; Freeling, S. E.; Berry, C. R.

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Year Published: 2005

How much is enough? The recurrent problem of setting measurable objectives in conservation

International agreements, environmental laws, resource management agencies, and environmental nongovernmental organizations all establish objectives that define what they hope to accomplish. Unfortunately, quantitative objectives in conservation are typically set without consistency and scientific rigor. As a result, conservationists are failing...

Tear, Timothy; Kareiva, Peter; Angermeier, Paul; Comer, P.; Czech, Brian; Kautz, R.; Landon, L.; Mehlman, D.; Murphy, K.; Ruckelshaus, M.; Scott, J. Michael; Wilhere, G.

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Year Published: 2005

Survival and selection of migrating salmon from capture-recapture models with individual traits

Capture–recapture studies are powerful tools for studying animal population dynamics, providing information on population abundance, survival rates, population growth rates, and selection for phenotypic traits. In these studies, the probability of observing a tagged individual reflects both the probability of the individual surviving to the time...

Zabel, Richard; Wagner, Tyler; Congleton, James; Smith, Steven G.; Williams, John G.

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Year Published: 2005

p,p'-DDE depresses the immune competence of chinook salmon (Oncorhynchus tshawytscha) leukocytes

p,p′-DDE, the main metabolite of DDT, is still detected in aquatic environments throughout the world. Here, the effects and mechanisms by which p,p′-DDE exposure might affect the immune system of chinook salmon (Oncorhynchus tshawytscha) was studied. Isolated salmon splenic and pronephric leukocytes were incubated with different...

Misumi, Ichiro; Vella, Anthony T.; Leong, Jo-Ann C.; Nakanishi, Teruyuki; Schreck, Carl B.

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Year Published: 2004

An annotated bibliography of selected guides for stream habitat improvement in the Pacific Northwest

This annotated bibliography is a response to widespread interest in stream habitat improvement in the Pacific Northwest by land managers, governmental and nongovernmental organizations, and the lay public. Several guides to stream habitat improvement have been written in the past, but may not be easily accessible to people from diverse backgrounds...

Keim, R.F.; Price, A.B.; Hardin, T. S.; Skaugset, Arne E.; Bateman, D.S.; Gresswell, R.E.; Tesch, S. D.

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Year Published: 2004

American black bear denning behavior: Observations and applications using remote photography

Researchers examining American black bear (Ursus americanus) denning behavior have relied primarily on den-site visitation and radiotelemetry to gather data. Repeated den-site visits are time-intensive and may disturb denning bears, possibly causing den abandonment, whereas radiotelemetry is sufficient only to provide gross data on den emergence....

Bridges, A.S.; Fox, J.A.; Olfenbuttel, C.; Vaughan, M.B.

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Year Published: 2004

Assessing rarity of species with low detectability: Lichens in Pacific Northwest forests

We show how simple statistical analyses of systematically collected inventory data can be used to provide reliable information about the distribution and habitat associations of rare species. Using an existing design-based sampling grid on which epiphytic macrolichens had been inventoried in the Northwest Forest Plan area of the U.S. Pacific...

Edwards, T.C.; Cutler, D.R.; Geiser, L.; Alegria, J.; McKenzie, D.

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Year Published: 2004

Characteristics of smallmouth bass (Micropterus dolomieu) and shadow bass (Ambloplites ariommus) populations in an Ozark stream before and after rainbow trout introduction

We evaluated characteristics of smallmouth bass (Micropterus dolomieu) and shadow bass (Ambloplites ariommus) populations in a small, northeastern Oklahoma Ozark stream from February 2000 to March 2003 to evaluate potential effects of rainbow trout (Oncorhynchus mykiss) introduction on these species. We experimentally stocked rainbow trout into...

Walsh, M.G.; Winkelman, D.L.