Index Catalog // ScholarsArchive@OSU

Aging Giant Pacific Octopus using Beaks and Stylets for Better Stock Structure Assessment

Creator:: Yarbrough, Ashley
Abstract:: Despite being a highly charismatic and frequently exhibited organism, Giant Pacific Octopus (Enteroctopus dofleini) population dynamics are poorly understood. Basic monitoring data for this species is limited to bycatch and stomach contents of other fisheries species. An essential step to a better estimation of population size and productivity is to...
Resource Type:: Poster
Full Text:: Microsoft PowerPoint - Octopus Aging Poster Final draft

Ecological Effects of Tide Gate Upgrade or Removal: A Literature Review and Knowledge Synthesis - Final report

Creator:: Giannico, Guillermo, Souder, Jon, Tomaro, Londi, and Behan, Jeff
Abstract:: This document reports on findings, conclusions and recommendations derived from scientific literature and knowledge regarding the effectiveness of tide gate removal or upgrade in improving conditions for Oregon’s native migratory fish species, particularly salmonids, and other plant and animal species that utilize estuarine ecosystems. The project was commissioned by the...
Resource Type:: Technical Report
Full Text:: aging tide gates generally worthwhile in terms of improved fish passage and estuarine habitat

Acoustic monitoring reveals the times and tides of harbor porpoise (Phocoena phocoena) distribution off central Oregon, U.S.A.

Creator:: Holdman, Amanda K., Haxel, Joseph H., Klinck, Holger, and Torres, Leigh G.
Abstract:: Harbor porpoises (Phocoena phocoena) are commonly observed in Oregon's nearshore marine environment yet knowledge of their ecosystem use and behavior remains limited, generating concerns for potential impacts on this species from future coastal development. Passive acoustic monitoring was used to investigate spatial and temporal variations in the presence and foraging...
Resource Type:: Article
Full Text:: . 2005) and thus provide a consistent and predictable for- aging resource. Meanwhile, harbor porpoise at

A sense of scale : Foraging cetaceans’ use of scale-dependent multimodal sensory systems

Creator:: Torres, Leigh G.
Abstract:: Research on cetacean foraging ecology is central to our understanding of their spatial and behavioral ecology. Yet, functional mechanisms by which cetaceans detect prey across different scales remain unclear. Here, I postulate that cetaceans utilize a scale-dependent, multimodal sensory system to assess and increase prey encounters. I review the literature...
Resource Type:: Article
Full Text:: and dolphin for- aging at micro and lower end fine scales. Dolphins—Despite being highly recognized

Factors Affecting Incubation Patterns and Sex Roles of Black Oystercatchers in Alaska

Creator:: Spiegel, Caleb S., Haig, Susan M., Goldstein, Michael I., and Huso, Manuela
Abstract:: Studies examining the effects of human disturbance on avian parental behavior and reproductive success are fundamental to bird conservation. However, many such studies fail to also consider the influence of natural threats, a variable environment, and parental roles. Our work examines interactive relationships of cyclical (time of day, tide, temperature,...
Resource Type:: Article
Full Text:: Society 2012 5Current address: U.S. Fish and Wildlife Service, Division of Migratory Birds, 300 Westgate

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:: and M. O’Connor, eds. Ciba Foundation Colloquia on Aging. Vol 5. J. & A. Churchill, London. Brown, J

Pleuronectid production system and its fishery : annual report 1979 for project No. R/OPF-1

Creator:: Carey, A. G., Pearcy, William G., Richardson, S. L., Tyler, A. V., Warren, C. E., and Oregon State University. Sea Grant College Program
Resource Type:: Technical Report
Full Text:: been to establish and validate a technique for aging Parophrys vetulus larvae and transforming plank

Susceptibility of Juvenile Steelhead to Avian Predation: the Influence of Individual Fish Characteristics and River Conditions

Creator:: Hostetter, Nathan J., Evans, Allen F., Roby, Daniel D., and Collis, Ken
Abstract:: Identification of the factors that influence susceptibility to predation can aid in developing management strategies to recover fish populations of conservation concern. Predator-prey relationships can be influenced by numerous factors, including prey condition, prey size, and environmental conditions. We investigated these factors by using juvenile steelhead Oncorhynchus mykiss from the...
Resource Type:: Article
Full Text:: management, however, rarely consider the influence of prey condition and predator for- aging strategies (Mesa

Intra‐ and inter‐annual variation in gray whale body condition on a foraging ground

Creator:: Soledade Lemos, Leila, Burnett, Jonathan D., Chandler, Todd E., Sumich, James L., and Torres, Leigh G.
Abstract:: Baleen whales store energy gained on foraging grounds to support reproduction and other metabolic needs while fasting for long periods during migration. Whale body condition can be used to monitor foraging success, and thus better understand and anticipate individual‐ and population‐level trends in reproduction and survival. We assessed the body...
Resource Type:: Article
Full Text:: Intra‐ and inter‐annual variation in gray whale body

Tide gates in the Pacific Northwest : operation, types, and environmental effects

Creator:: Giannico, Guillermo and Souder, Jon A.
Abstract:: This report is an attempt to address some critical information gaps regarding the effects of dikes and tide gates on coastal ecosystems and fisheries resources. The authors have identified the information needs during their work with landowners, community organizations, and resource management agencies and through a compilation and summary of...
Resource Type:: Technical Report
Full Text:: , and Environmental Effects Oregon Sea Grant • ORESU-T-05-001 Tide Gates in the Pacific Guillermo

ScholarsArchive@OSU

Aging Giant Pacific Octopus using Beaks and Stylets for Better Stock Structure Assessment

Ecological Effects of Tide Gate Upgrade or Removal: A Literature Review and Knowledge Synthesis - Final report

Acoustic monitoring reveals the times and tides of harbor porpoise (Phocoena phocoena) distribution off central Oregon, U.S.A.

A sense of scale : Foraging cetaceans’ use of scale-dependent multimodal sensory systems

Factors Affecting Incubation Patterns and Sex Roles of Black Oystercatchers in Alaska

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

Pleuronectid production system and its fishery : annual report 1979 for project No. R/OPF-1

Susceptibility of Juvenile Steelhead to Avian Predation: the Influence of Individual Fish Characteristics and River Conditions

Intra‐ and inter‐annual variation in gray whale body condition on a foraging ground

Tide gates in the Pacific Northwest : operation, types, and environmental effects

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