Cooperative Research Units

Home

Programs L2 Landing Page

Filter Total Items: 2,625
Publication Thumbnail
Year Published: 2009

Maintaining population persistence in the face of an extremely altered hydrograph: implications for three sensitive fishes in a tributary of the Green River, Utah

The ability of an organism to disperse to suitable habitats, especially in modified and fragmented systems, determines individual fitness and overall population viability. The bluehead sucker (Catostomus discobolus), flannelmouth sucker (Catostomus latipinnis), and roundtail chub (Gila robusta) are three species native to the upper Colorado River...

Bottcher, Jared L.
Maintaining population persistence in the face of an extremely altered hydrograph: implications for three sensitive fishes in a tributary of the Green River, Utah; 2009; Thesis; Bottcher, Jared L.

Publication Thumbnail
Year Published: 2009

A large volume striped bass egg incubation chamber: design and comparison with a traditional method

I conducted a comparative study of a new jar design (experimental chamber) with a standard egg incubation vessel (McDonald jar). Experimental chambers measured 0.4 m in diameter by 1.3 m in height and had a volume of 200 L. McDonald hatching jars measured 16 cm in diameter by 45 cm in height and had a volume of 6 L. Post-hatch survival was...

Harper, C.J.

Publication Thumbnail
Year Published: 2009

Adaptive management of watersheds and related resources

The concept of learning about natural resources through the practice of management has been around for several decades and by now is associated with the term adaptive management. The objectives of this paper are to offer a framework for adaptive management that includes an operational definition, a description of conditions in which it can be...

Williams, Byron K.

Publication Thumbnail
Year Published: 2009

An evaluation of sex-age-kill (SAK) model performance

The sex-age-kill (SAK) model is widely used to estimate abundance of harvested large mammals, including white-tailed deer (Odocoileus virginianus). Despite a long history of use, few formal evaluations of SAK performance exist. We investigated how violations of the stable age distribution and stationary population assumption, changes to male or...

Millspaugh, Joshua J.; Skalski, John R.; Townsend, Richard L.; Diefenbach, Duane R.; Boyce, Mark S.; Hansen, Lonnie P.; Kammermeyer, Kent
An evaluation of Sex-Age-Kill (SAK) model performance; 2009; Article; Journal; Journal of Wildlife Management; Millspaugh, J. J.; Skalski, J. R.; Townsend, R. L.; Diefenbach, D. R.; Boyce, M. S.; Hansen, L. P.; Kammermeyer, K.

Publication Thumbnail
Year Published: 2009

An introduction to standardized sampling: chapter 1

It was probably one of the oddest riots in the history of the United States. In Erie, Pennsylvania during 1853. federal marshals were called to restore order during bloody uprisings. A mob of women, equipped with sledgehammers, was tearing up railroad rack to protest standardization of track width (Nesmith 1985). All across the United States,...

Bonar, Scott A.; Hubert, Wayne A.; Willis, David W.; Bonar, Scott A.; Contreras-Balderas, Salvador; Iles, Alison C.
An introduction to standardized sampling; 2009; Article; Book; Standard methods for sampling North American freshwater fishes; Bonar, S. A.; Contreras-Balderas, S. ; Iles, A. C.

Publication Thumbnail
Year Published: 2009

Brood rearing ecology of king eiders on the north slope of Alaska

We examined King Eider (Somateria spectabilis) brood survival in the Kuparak oil field in northern Alaska in 2002 and 2003 by monitoring hens with broods using radiotelemetry. We observed complete brood loss in eight of 10 broods. Broods survived less than 2 weeks on average, and most mortality occurred within 10 days of hatch. Distance hens...

Phillips, Laura M.; Powell, Abby N.
Brood rearing ecology of king eiders on the north slope of Alaska; 2009; Article; Journal; Wilson Journal of Ornithology; Phillips, L. M.; Powell, A. N.

Publication Thumbnail
Year Published: 2009

Changes in vegetation in northern Alaska under scenarios of climate change, 2003-2100: Implications for climate feedbacks

Assessing potential future changes in arctic and boreal plant species productivity, ecosystem composition, and canopy complexity is essential for understanding environmental responses under expected altered climate forcing. We examined potential changes in the dominant plant functional types (PFTs) of the sedge tundra, shrub tundra, and boreal...

Euskirchen, Eugénie S.; McGuire, Anthony D.; Chapin, F. Stuart; Yi, S.; Thompson, Catharine Copass
Changes in vegetation in northern Alaska under scenarios of climate change, 2003-2100: implications for climate feedbacks; 2009; Article; Journal; Ecological Applications; Euskirchen, E. S.; Mcguire, A. D.; Chapin, F. S.; Yi, S.; Thompson, C. C.

Publication Thumbnail
Year Published: 2009

Coldwater fish in large standing waters: chapter 7

No abstract available.

Bonar, Scott A.; Hubert, Wayne A.; Willis, David W.; Beauchamp, David A.; Parrish, Donna L.; Whaley, Roy A.
Coldwater fish in large standing waters; 2009; Article; Book; Standard methods for sampling North American freshwater fishes; Beauchamp, David A.; Parrish, Donna L.; Whaley, Roy A.

Publication Thumbnail
Year Published: 2009

Coldwater fish in small standing waters: chapter 6

No abstract available.

Bonar, Scott A.; Hubert, Wayne A.; Willis, David W.; Lester, Nigel P.; Bailey, Paul E.; Hubert, Wayne A.
Coldwater fish in small standing waters; 2009; Article; Book; Standard methods for sampling North American freshwater fishes; Lester, N. P.; Bailey, P. E.; Hubert, W. A.

Publication Thumbnail
Year Published: 2009

Does winter region affect spring arrival time and body mass of king eiders in northern Alaska?

Events during the non-breeding season may affect the body condition of migratory birds and influence performance during the following breeding season. Migratory birds nesting in the Arctic often rely on endogenous nutrients for reproductive efforts, and are thus potentially subject to such carry-over effects. We tested whether king eider (...

Oppel, Steffen; Powell, Abby N.
Does winter region affect spring arrival time and body mass of king eiders in northern Alaska?; 2009; Article; Journal; Polar Biology; Oppel, S.; Powell, A. N.

Publication Thumbnail
Year Published: 2009

Effects of highway construction on stream water quality and macroinvertebrate condition in a mid-Atlantic highlands watershed, USA

Refining best management practices (BMPs) for future highway construction depends on a comprehensive understanding of environmental impacts from current construction methods. Based on a before-after-control impact (BACI) experimental design, long-term stream monitoring (1997–2006) was conducted at upstream (as control, n = 3) and...

Welsh, Stuart A.; Chen, Yushun; Viadero, Stuart C.; Wei, Xinchao; Hedrick, Lara B.; Anderson, James T.; Lin, Lian-Shin

Publication Thumbnail
Year Published: 2009

Effects of introduced fish on macroinvertebrate communities in historically fishless headwater and kettle lakes

Widespread fish introductions have led to a worldwide decline in the number of fishless lakes and their associated communities. Studies assessing effects of fish stocking on native communities in historically fishless lakes have been limited to high-elevation headwater lakes stocked with non-native trout. Little is known about the effect of fish...

Schilling, Emily Gaenzle; Loftin, Cynthia S.; Huryn, Alexander D.
Effects of introduced fish on macroinvertebrate communities in historically fishless headwater and kettle lakes; 2009; Article; Journal; Biological Conservation; Schilling, E. G.; Loftin, C. S.; Huryn, A. D.