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Habitat Selection by Greater Sage-Grouse During Winter in Southeastern Oregon

Creator:: Hagen, Christian A., Willis, Mitchell J., Glenn, Elizabeth M., and Anthony, Robert G.
Abstract:: The distribution and geographic range of Greater Sage-Grouse (Centrocercus urophasianus) have been reduced by 56% since European settlement. Although loss and fragmentation of sagebrush (Artemisia spp.) habitats have been cited as the primary causes for the decline of the species, degradation of existing habitat also has been considered an important...
Resource Type:: Article
Full Text:: us e at J ac k C re ek , H ar t M ou nt ai n N at io na l A nt el op e R ef ug e

Temporal changes in the feeding habits of bullfrogs from three different habitat types in the Willamette Valley, Oregon

Creator:: Bouska, Cassie K.
Abstract:: Bullfrogs were introduced into Oregon in the early 1900s and have become widespread members of many wetland communities. Little is known of their ecology outside their native range, although they may play a role in the current declines observed in native herpetofauna. I analyzed the diets of 401 bullfrogs from...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Cassie K. Bouska for the degree of

The role of food limitation and predation on reproductive success of burrowing owls in southern California

Creator:: Haley, Katherin L
Abstract:: The temporal and spatial variation in reproductive success exhibited by burrowing owls (Athene cunicularia hypugaea) facilitates the testing of mechanisms influencing this parameter. I predicted that food supplementation would increase reproductive success through one of two means: (1) directly, through increasing food availability and decreasing the effects of brood reduction,...
Resource Type:: Masters Thesis
Full Text:: , L. Houck, D. Roby, M. York, and N. Ronan for helpful discussion and comments on the manuscript, K

Aspects of the early life history of juvenile salmonids in the Dungeness River Estuary

Creator:: Sather, Nichole K.
Abstract:: The decline of many Pacific salmon stocks has stimulated interest in the early life history and habitat requirements of juvenile salmon. Although estuarine habitat associations of juvenile salmon have been investigated in many coastal areas of the eastern Pacific Ocean, until recently, little was known about juvenile salmonid ecology within...
Resource Type:: Masters Thesis
Full Text:: was provided by C. Burns, B. Delorm, J. Parrish, K. Parrish, R. Sather, L. Ogg, S. Ogg, E. Ogg, K

Habitat use, movement, and life history variation of coastal cutthroat trout, Oncorhynchus clarkii clarkii, in the Salmon River estuary, Oregon

Creator:: Krentz, Lisa K.
Abstract:: Anadromous coastal cutthroat trout Oncorhynchus clarkii clarkii may be highly dependent on estuaries, passing through them multiple times during their lifetime. However, few studies have investigated estuarine use by coastal cutthroat trout and it is often thought that estuaries serve primarily as migration corridors rather than rearing areas. We used...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Lisa K. Krentz for the

Growth, residence, and movement of juvenile Chinook salmon within restored and reference estuarine marsh channels in Salmon River, Oregon

Creator:: Hering, David K.
Abstract:: Tidal wetland channels provide rearing habitat for juvenile Chinook salmon as they emigrate from freshwater habitat and prepare to enter the ocean. Widespread diking and drainage of estuarine marshes for agricultural and urban development may have contributed to a decline in salmon abundance in the Pacific Northwest, prompting efforts to...
Resource Type:: Masters Thesis
Full Text:: Ian A. Fleming, Daniel L. Bottom and Kim K. Jones contributed to Chapter Two, “Abundance, growth

A review and key to the apogonid fishes (Pisces: Perciformes) of the Northwestern Arabian Sea and Southern Gulf of Oman, with description of two new species

Creator:: Mee, Jonathan K. L.
Abstract:: Field collections in the Southern Gulf of Oman and the Northwestern Arabian Sea, and examination of museum collections from this study area, yielded 7 genera and 33 species of apogonid fishes. Twenty one species of Apogon, one Archamia, four Cheilodipterus, three Fowleria, one Rhabdamia, two Siphamia, and one Holapogon are...
Resource Type:: Masters Thesis

Stags of the Sea or Hedgehogs of the Harbor? Inferring the Point of Sculpin Cranial Weaponry

Creator:: Buser, Thaddaeus J.
Abstract:: Animal weapons are thought to have evolved to compete for reproductive opportunities within a species. Across the diverse weapon-bearing taxa, several evolutionary trends have emerged: (1) increasing complexity and relative size across ontogeny, (2) sexual dimorphism, and (3) higher levels of random deviations from symmetry (i.e., fluctuating asymmetry) than non-weaponized...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________ Brian L. Sidlauskas Animal weapons are thought to have evolved to compete for

Habitat relationships of native and non-native fishes of the Willamette River, Oregon

Creator:: Williams, Joshua E.
Abstract:: The Willamette River flows north between the Cascade Mountains and Coast Range of western Oregon within a 29,728-km² basin. The fish community in the geologically young basin consists of 36 native species, but introductions of non-native fishes have added 33 additional species for a total of 69 fish species. During...
Resource Type:: Masters Thesis

Sediment characteristics and the trophic status of four Oregon lakes

Creator:: Meyerhoff, Roger Dean
Abstract:: There is evidence that recent ecological changes in lakes and their watersheds can be detected from analysis of lake sediments. This study was initiated to correlate changes in some sediment characteristics of four Oregon lakes with past cultural developments of the lakes and their watersheds. The lakes chosen for this...
Resource Type:: Masters Thesis
Full Text:: Graduate S Date thesis is presented 797 Typed by Deanna L. Cramer for Roger Dean Meyerhoff Redacted for

ScholarsArchive@OSU

Habitat Selection by Greater Sage-Grouse During Winter in Southeastern Oregon

Temporal changes in the feeding habits of bullfrogs from three different habitat types in the Willamette Valley, Oregon

The role of food limitation and predation on reproductive success of burrowing owls in southern California

Aspects of the early life history of juvenile salmonids in the Dungeness River Estuary

Habitat use, movement, and life history variation of coastal cutthroat trout, Oncorhynchus clarkii clarkii, in the Salmon River estuary, Oregon

Growth, residence, and movement of juvenile Chinook salmon within restored and reference estuarine marsh channels in Salmon River, Oregon

A review and key to the apogonid fishes (Pisces: Perciformes) of the Northwestern Arabian Sea and Southern Gulf of Oman, with description of two new species

Stags of the Sea or Hedgehogs of the Harbor? Inferring the Point of Sculpin Cranial Weaponry

Habitat relationships of native and non-native fishes of the Willamette River, Oregon

Sediment characteristics and the trophic status of four Oregon lakes

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