Cooperative Research Units

Home

Programs L2 Landing Page

Filter Total Items: 2,921
Publication Thumbnail
Year Published: 2008

Pit tag retention in small (205-370 mm) American eels, Anguilla rostrata

No abstract available.

Zimmerman, Jennifer L.; Welsh, Stuart A.
Zimmerman, J. L., and S. A. Welsh. 2008. Pit tag retention in small (205-370 mm) American eels, Anguilla rostrata. Proceedings of the West Virginia Academy of Sciences 79(2):1-8.

Publication Thumbnail
Year Published: 2008

Rivers and streams: Ecosystem dynamics and integrating paradigms

Full understanding of running waters requires an ecosystem perspective, which encompasses the physical and chemical setting in interaction with dependent biological communities. Several conceptual models or paradigms of river and stream ecosystems that capture critical components of lotic ecosystems have been developed, including the ‘river...

Cummins, K.W.; Wilzbach, M.A.

Publication Thumbnail
Year Published: 2008

The desperate dozen: Fishes on the brink

IT IS NO SECRET THAT OUR NATIVE AQUATIC ANIMALS ARE IN DECLINE. There are currently 582 species of animals on the Federal list of endangered and threatened species, 268 of these (46%) are found in freshwater habitats. Of the amazing assemblage of 675 fishes found in southeastern waters, more than a quarter are considered imperiled. While all of...

Welsh, Stuart A.

Publication Thumbnail
Year Published: 2007

Importance of well-designed monitoring programs for the conservation of endangered species: Case study of the Snail Kite

Monitoring natural populations is often a necessary step to establish the conservation status of species and to help improve management decisions. Nevertheless, many monitoring programs do not effectively address primary sources of variability in monitoring data, which ultimately may limit the utility of monitoring in identifying declines and...

Martin, J.; Kitchens, W.M.; Hines, J. E.

Publication Thumbnail
Year Published: 2007

Evaluating robustness in rank-based risk assessments of freshwater ecosystems

Conservation planning aims to protect biodiversity by sustainng the natural physical, chemical, and biological processes within representative ecosystems. Often data to measure these components are inadequate or unavailable. The impact of human activities on ecosystem processes complicates integrity assessments and might alter ecosystem...

Mattson, K.M.; Angermeier, Paul

Publication Thumbnail
Year Published: 2007

Assessing functional equivalency of nekton habitat in enhanced habitats: Comparison of terraced and unterraced marsh ponds

A primary goal of many coastal restoration programs is to increase nekton habitat in terms of both quantity and quality. Using shallow water ponds rehabilitated with a technique called marsh terracing, we examined the quality of nekton habitat created, using and comparing several metrics including nekton density and diversity, functional group...

La Peyre, M.K.; Gossman, B.; Nyman, J.A.

Publication Thumbnail
Year Published: 2007

Assessing the concentration, speciation, and toxicity of dissolved metals during mixing of acid-mine drainage and ambient river water downstream of the Elizabeth Copper Mine, Vermont, USA

The authors determine the composition of a river that is impacted by acid-mine drainage, evaluate dominant physical and geochemical processes controlling the composition, and assess dissolved metal speciation and toxicity using a combination of laboratory, field and modeling studies. Values of pH increase from 3.3 to 7.6 and the sum of dissolved...

Balistrieri, Laurie S.; Seal, R.R.; Piatak, N.M.; Paul, B.

Publication Thumbnail
Year Published: 2007

Fish assemblages of the upper Little Sioux River basin, Iowa, USA: Relationships with stream size and comparison with historical assemblages

We characterized the fish assemblages in second to fifth order streams of the upper Little Sioux River basin in northwest Iowa, USA and compared our results with historical surveys. The fish assemblage consisted of over twenty species, was dominated numerically by creek chub, sand shiner, central stoneroller and other cyprinids, and was dominated...

Palic, D.; Helland, L.; Pedersen, B.R.; Pribil, J.R.; Grajeda, R.M.; Loan-Wilsey, Anna; Pierce, C.L.

Publication Thumbnail
Year Published: 2007

Foraging patterns of Caspian terns and double-crested cormorants in the Columbia River estuary

We examined spatial and temporal foraging patterns of Caspian terns and double-crested cormorants nesting in the Columbia River estuary, to potentially identify circumstances where juvenile salmonids listed under the U.S. Endangered Species Act might be more vulnerable to predation by these avian piscivores. Data were collected during the 1998 and...

Lyons, Donald E.; Roby, D.D.; Collis, K.

Publication Thumbnail
Year Published: 2007

Introduced species and abiotic factors affect longitudinal variation in small fish assemblages in the Wind River watershed, Wyoming

We assessed longitudinal variation in small fish assemblages in the Wind River watershed upstream from Boysen Reservoir, Wyoming and into the reservoir. Twenty-six species were found in the study area, and 12 of the species were believed to have been introduced since settlement by Europeans. Additions and losses of fish species occurred with...

Lionberger, P.S.; Hubert, W.A.

Publication Thumbnail
Year Published: 2007

Walleye consumption and long-term population trends following gizzard shad introduction into a Western South Dakota reservoir

The gizzard shad (Dorosoma cepedianum) was introduced into 1,955-ha Angostura Reservoir, South Dakota to provide increased prey resources for walleye (Sander vitreus). Linear correlation analysis indicated that following gizzard shad introduction, walleye catch-per-unit-effort and mean length at age have increased over time (r = 0.68 to 0.85, P =...

Ward, M.J.; Willis, D.W.; Miller, B.H.; Chipps, S.R.

Publication Thumbnail
Year Published: 2006

Ecosystem element cycling

El-Shaarawi, Abdel H.; Piegorsch, Walter W.; McGuire, A. David
Ecosystem element cycling; 2006; Book chapter; Book; Encyclopedia of Environmetrics; McGuire, A. David