Index Catalog // ScholarsArchive@OSU

A Comparative Study of Foraging Behavior and Disturbance Regimes in Urban Versus Agricultural Habitats used by Cackling Geese Wintering in the Willamette Valley, Oregon

Creator:: Harrington, Erin R.
Abstract:: The Cackling goose (Branta hutchinsii minima) population has increased from a low of 20,000 in 1984 to the current population of 220,000-300,000 (Stehn 2012, Sanders 2013). As the Cackling goose population began to recover in the late 1990s, the majority of the population relocated from wintering in California to the...
Resource Type:: Masters Thesis
Full Text:: , Portland, Finley NWR, Ankeny NWR, and Baskett Slough NWR…..………......15 2. Proportion of disturbances to

A comparison of early marine residence in hatchery and natural Chinook salmon (Oncorhynchus tshawytscha)

Creator:: Claiborne, Andrew M.
Abstract:: The mechanisms of mortality during critical life stages of fish are not well-understood and, for many species, it is not clear if the mechanisms are similar for naturally and artificially propagated individuals. For Chinook salmon (Oncorhynchus tshawytscha), natural fish potentially face negative interactions, such as competition, and survival disadvantages, such...
Resource Type:: Masters Thesis
Full Text:: types during early marine residence but no difference in median size at marine entry (100 ± 3.5 mm

A comparison of nest site selection and reproductive effort by reticulate sculpin (Cottus perplexus) in two streams of different geologies in the central Coast Range of Oregon

Creator:: Bateman, Douglas S.
Abstract:: Nest sites of reticulate sculpin (Cottus perplexus) were located in two stream reaches, one from a basalt basin and one from a sandstone basin. Stream reaches were similar in gradient, basin area, elevation, climate, and riparian vegetation but differed in biologic community structure and substrate characteristics. An electivity index was...
Resource Type:: Masters Thesis
Full Text:: units but one. No nests were found on bedrock, wood, or fine sediment substrate. A small number of

A comparison of the behavior and survival of juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (O. mykiss) in a small estuary system

Creator:: Clements, Shaun, Stahl, Thomas, and Schreck, Carl B.
Abstract:: We used radio and acoustic telemetry to study the behavior and survival of wild steelhead trout (Oncorhynchus mykiss) and hatchery coho salmon (Oncorhynchus kisutch) and steelhead outmigrants in a small coastal estuary during two years. Survival was generally low for hatchery fish but more variable, both within and between years,...
Resource Type:: Article
Full Text:: ) and held for 15–20 min prior to tag- ging. Water in the holding tank was periodically replaced to

A comparison of the reproductive rates of zooplankton in East and Paulina Lakes

Creator:: Alevras, Ronald Allen
Resource Type:: Masters Thesis
Full Text:: Daphnia pulex in East Lake, 1968. Average temperature is for the upper 15 m of the lake. 33 Table 9

A cost-efficient method to assess carbon stocks in tropical peat soil

Creator:: Warren, M. W., Kauffman, J. B., Murdiyarso, D., Anshari, G., Hergoualc'h, K., Kurnianto, S., Purbopuspito, J., Gusmayanti, E., Afifudin, M., Rahajoe, J., Alhamd, L., Limin, S., and Iswandi, A.
Abstract:: Estimation of belowground carbon stocks in tropical wetland forests requires funding for laboratory analyses and suitable facilities, which are often lacking in developing nations where most tropical wetlands are found. It is therefore beneficial to develop simple analytical tools to assist belowground carbon estimation where financial and technical limitations are...
Resource Type:: Article
Full Text:: the midpoint of 0–15, 15–30, 30–50, 50–100, 100–300 cm depth increments, and every 50 cm thereafter

A Dimensionless Invariant for Relative Size at Sex Change in Animals: Explanation and Implications

Creator:: Gardner, Andy, Allsop, David J., Charnov, Eric L., and West, Stuart A.
Abstract:: Recent comparative studies across sex-changing animals have found that the relative size and age at sex change are strikingly invariant. In particular, 91%–97% of the variation in size at sex change across species can be explained by the simple rule that individuals change sex when they reach 72% of their...
Resource Type:: Article
Full Text:: vol. 165, no. 5 the american naturalist may 2005 � A

A dwarfed population of Catostomus rimiculus (Catostomidae: Pisces) in Jenny Creek, Jackson County, Oregon

Creator:: Hohler, David Berry
Abstract:: The population of Catostomus rimiculus from Jenny Creek basin is identified as a dwarfed derivative of the normally much larger C. rimiculus from the Klamath and Rogue River systems. C. rimiculus in Jenny Creek basin are separated from those in the Klamath by a series of 3-10m waterfalls resulting from...
Resource Type:: Masters Thesis
Full Text:: populations of Catostomus riiniculus. 46 15 Frequency and mean number of left pectoral fin rays in

A food web analysis of a Mojave Desert geothermal spring system and feeding ecology of Moapa dace (Moapa coriacea)

Creator:: StSaviour, Adam
Abstract:: Understanding food webs is fundamental in conserving endangered species and maintaining healthy ecosystem function, particularly in desert spring systems. We identified dominant energy sources in the Muddy River Warm Springs area, Clark County, NV using carbon and nitrogen natural abundance stable isotope analyses. We examined isotopic signatures of specific macroinvertebrate...
Resource Type:: Masters Thesis
Full Text:: no change in δ 15 N from upstream to down stream because nitrogen sources are unchanged

A genetic study of the red-band trout (Salmo sp.)

Creator:: Wilmot, Richard L.
Abstract:: A group of trout that reside in streams of the desiccating lake basins of southeastern Oregon differ markedly from other known Salmo. Known commonly as the red-band trout, this fish was subjected to chromosome analysis for comparison with other species of western North American Salmo. The karyotype of the red-banded...
Resource Type:: Dissertation
Full Text:: 13 10 AO AA ilk 4111 no 11 ir 21 71 .6 15 of Fremont National Forest into Palina Marsh, a

ScholarsArchive@OSU

A Comparative Study of Foraging Behavior and Disturbance Regimes in Urban Versus Agricultural Habitats used by Cackling Geese Wintering in the Willamette Valley, Oregon

A comparison of early marine residence in hatchery and natural Chinook salmon (Oncorhynchus tshawytscha)

A comparison of nest site selection and reproductive effort by reticulate sculpin (Cottus perplexus) in two streams of different geologies in the central Coast Range of Oregon

A comparison of the behavior and survival of juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (O. mykiss) in a small estuary system

A comparison of the reproductive rates of zooplankton in East and Paulina Lakes

A cost-efficient method to assess carbon stocks in tropical peat soil

A Dimensionless Invariant for Relative Size at Sex Change in Animals: Explanation and Implications

A dwarfed population of Catostomus rimiculus (Catostomidae: Pisces) in Jenny Creek, Jackson County, Oregon

A food web analysis of a Mojave Desert geothermal spring system and feeding ecology of Moapa dace (Moapa coriacea)

A genetic study of the red-band trout (Salmo sp.)

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