Index Catalog // ScholarsArchive@OSU

Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations

Creator:: Piacenza, Susan E. H.
Abstract:: Green sea turtles, Chelonia mydas, have endangered and threatened populations globally, but several populations show signs of population recovery. In Hawaii, nesting female green turtles have increased 5.7% year⁻¹ since 1973, but wide fluctuations in census counts of nesting females make recovery diagnosis difficult. For effective management planning, it is...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Susan E. H

Impact of land use patterns and agricultural practices on water quality in the Calapooia River Basin of western Oregon

Creator:: Mueller-Warrant, G. W., Griffith, S. M., Whittaker, G. W., Banowetz, G. M., Pfender, W. F., Garcia, T. S., and Giannico, G. R.
Abstract:: Agricultural practices, including tillage, fertilization, and residue management, can affect surface runoff, soil erosion, and nutrient cycling. These processes, in turn, may adversely affect (1) quality of aquatic resources as habitat for amphibians, fish, and invertebrates, (2) costs of treating surface and ground water to meet drinking water standards, and...
Resource Type:: Article
Full Text:: 10, February 7, March 7, April 6, May 4, June 8, July 8, August 15, and September 19 in 2006; and

Divergent anti-predator strategies and risk allocation in juveniles of three NorthPacific flatfishes

Creator:: Boersma, Kate S.
Abstract:: Frequent or lengthy predation risk can cause one of two modifications of prey feeding behavior: 1) postponement of feeding to less risky periods, or 2) resumption of feeding behavior despite persistent risk. North Pacific flatfishes exhibit both of these responses when confronted with temporal variation in risk, and this experimental...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ Clifford H. Ryer Selina S. Heppell Frequent or lengthy predation risk

Individual condition and stream temperature influence early maturation of rainbow and steelhead trout, Oncorhynchus mykiss

Creator:: McMillan, John R., Dunham, Jason B., Reeves, Gordon H., Mills, Justin S., and Jordan, Chris E.
Abstract:: Alternative male phenotypes in salmonine fishes arise from individuals that mature as larger and older anadromous marine-migrants or as smaller and younger freshwater residents. To better understand the processes influencing the expression of these phenotypes we examined the influences of growth in length (fork length) and whole body lipid content...
Resource Type:: Article
Full Text:: Mainstem 3 4 5 0 9 18 South Fork 7 10 12 0 21 43 North Fork 6 10 6 1 19 36 Total 30 35 53 1 79 168

Amphibian communities and climate change : Where ecological processes meet evolutionary interactions

Creator:: Thurman, Lindsey L.
Abstract:: Forecasts of the impacts of climate change have traditionally focused on individual species and their phenotypes, phenology, or distribution. However, shifts in species distributions and the resulting reorganization of community composition represent an important violation to the assumption of species acting in isolation. Whereas species may respond individualistically to climate...
Resource Type:: Dissertation
Full Text:: ....................................................................................................144 APPENDIX E – Supplementary results from Ch. 4 time-series analysis of species co-occurrence

Agricultural impacts on amphibian survival, growth, and distributions

Creator:: Baker, Nick J.
Abstract:: The potential impact of chemical contaminants and conservation practices on amphibians in agricultural landscapes is a key research topic globally. Amphibians represent a common group in many freshwater systems and are currently experiencing worldwide population declines. Global amphibian declines may be attributed to a number of causes, including habitat loss,...
Resource Type:: Masters Thesis
Full Text:: Agricultural Landscape..................................... 4 Introduction…………………………………………… 5

Defining micro-habitat relationships for juvenile black rockfish, Sebastes melanops

Creator:: Mann, Marion E.
Abstract:: The functioning of marine habitats needs to be understood in the context of the ecological relationships and associations between organisms and the physical and biogenic environment they inhabit. Thus, it becomes important to explore and define habitat features which contribute to these relationships and which are important in the life...
Resource Type:: Masters Thesis
Full Text:: 1, while replicates 4-6 refer to tank 2. Sessions 8 & 9 reflect dawn, while sessions 20 & 21reflect

Multiple steroid and thyroid hormones detected in baleen from eight whale species

Creator:: Lysiak, Nadine S., Moore, Michael J., Hunt, Kathleen E., Robbins, Jooke, Seton, Rosemary E., Buck, C. Loren, and Torres, Leigh G.
Abstract:: Recent studies have demonstrated that some hormones are present in baleen powder from bowhead (Balaena mysticetus) and North Atlantic right (Eubalaena glacialis) whales. To test the potential generalizability of this technique for studies of stress and reproduction in large whales, we sought to determine whether all major classes of steroid...
Resource Type:: Article
Full Text:: -abstract/5/1/cox061/4608888 by Oregon State University user on 11 June 2018 1 2 3 4 5 6 7 8 9 10 11 0

Assessment of fecal steroid and thyroid hormone metabolites in eastern North Pacific gray whales

Creator:: Lemos, Leila S., Olsen, Amy, Smith, Angela, Chandler, Todd E., Larson, Shawn, Hunt, Kathleen, and Torres, Leigh G.
Abstract:: Baleen whale fecal samples have high potential for endocrine monitoring, which can be used as a non-invasive tool to identify the physiological response to disturbance events and describe population health and vital rates. In this study, we used commercial enzyme-linked immunosorbent assays to validate and quantify fecal steroid (progestins, androgens...
Resource Type:: Article
Full Text:: blood and peak hormone excretion in feces is species dependent and typically takes from 4 to 48 h in

Distribution and movements of Chinook salmon, Oncorhynchus tshawytscha, returning to the Yukon River basin

Creator:: Eiler, John H.
Abstract:: Chinook salmon, Oncorhynchus tshawytscha, returning to the Yukon River basin and other large river systems in western Alaska have declined dramatically since the late 1990s. This continuing trend has raised concerns over the future status of the returns, and severely impacted commercial and subsistence fisheries within the drainage. Management is...
Resource Type:: Dissertation
Full Text:: H. Eiler for the degree of Doctor of Philosophy in Fisheries Science presented on August 1, 2013

ScholarsArchive@OSU

Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations

Impact of land use patterns and agricultural practices on water quality in the Calapooia River Basin of western Oregon

Divergent anti-predator strategies and risk allocation in juveniles of three NorthPacific flatfishes

Individual condition and stream temperature influence early maturation of rainbow and steelhead trout, Oncorhynchus mykiss

Amphibian communities and climate change : Where ecological processes meet evolutionary interactions

Agricultural impacts on amphibian survival, growth, and distributions

Defining micro-habitat relationships for juvenile black rockfish, Sebastes melanops

Multiple steroid and thyroid hormones detected in baleen from eight whale species

Assessment of fecal steroid and thyroid hormone metabolites in eastern North Pacific gray whales

Distribution and movements of Chinook salmon, Oncorhynchus tshawytscha, returning to the Yukon River basin

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