Index Catalog // ScholarsArchive@OSU

Creator:: Huggins, Jessica L., Raverty, Stephen A., Norman, Stephanie A., Calambokidis, John, Gaydos, Joseph K., Duffield, Deborah A., Lambourn, Dyanna M., Rice, James M., Hanson, Brad, Wilkinson, Kristin, Jeffries, Steven J., Norberg, Brent, and Barre, Lynne
Abstract:: In 2006, a marked increase in harbor porpoise Phocoena phocoena strandings were reported in the Pacific Northwest of the USA, resulting in the declaration of an unusual mortality event (UME) for Washington and Oregon to facilitate investigation into potential causes. The UME was in place during all of 2006 and...
Resource Type:: Article

Creator:: Goldbogen, Jeremy A., Hazen, Elliott L., Friedlaender, Ari S., Calambokidis, John, DeRuiter, Stacy L., Stimpert, Alison K., and Southall, Brandon L.
Abstract:: 1. Despite their importance in determining the rate of both energy gain and expenditure, how the fine-scale kinematics of foraging are modified in response to changes in prey abundance and distribution remain poorly understood in many animal ecosystems. 2. In the marine environment, bulk-filter feeders rely on dense aggregations of...
Resource Type:: Article

Creator:: Friedlaender, Ari S., Goldbogen, Jeremy A., Hazen, Elliott L., Calambokidis, John, and Southall, Brandon L.
Abstract:: A major focus in macroecology is to understand the mechanisms that drive differences in habitat, morphology, and behavior in closely related species (Brown 1995). Within this paradigm, energy use and prey acquisition play a fundamental role in affecting behavior, especially with respect to foraging patterns and predator‐prey interactions. Because resources...
Resource Type:: Article

Creator:: Stimpert, A. K., DeRuiter, S. L., Southall, B. L., Moretti, D. J., Falcone, E. A., Goldbogen, J. A., Friedlaender, A. S., Schorr, G. S., and Calambokidis, John
Abstract:: Beaked whales are hypothesized to be particularly sensitive to anthropogenic noise, based on previous strandings and limited experimental and observational data. However, few species have been studied in detail. We describe the underwater behavior of a Baird’s beaked whale (Berardius bairdii) from the first deployment of a multi-sensor acoustic tag...
Resource Type:: Article

Creator:: Lang, Aimée R., Calambokidis, John, Scordino, Jonathan, Pease, Victoria L., Klimek, Amber, Burkanov, Vladimir N., Gearin, Pat, Litovka, Dennis I., Robertson, Kelly M., Mate, Bruce R., Jacobsen, Jeff K., and Taylor, Barbara L.
Abstract:: Although most eastern North Pacific (ENP) gray whales feed in the Bering, Beaufort, and Chukchi Seas during summer and fall, a small number of individuals, referred to as the Pacific Coast Feeding Group (PCFG), show intra- and interseasonal fidelity to feeding areas from northern California through southeastern Alaska. We used...
Resource Type:: Article

Creator:: Baker, C. Scott, Steel, Debbie, Calambokidis, John, Falcone, Erin, González-Peral, Ursula, Barlow, Jay, Burdin, Alexander M., Clapham, Phillip J., Ford, John K. B., Gabriele, Christine M., Mattila, David, Rojas-Bracho, Lorenzo, Straley, Janice M., Taylor, Barbara L., Urbán, Jorge, Wade, Paul R., Weller, David, Witteveen, Briana H., and Yamaguchi, Manami
Abstract:: We quantified the relative influence of maternal fidelity to feeding grounds and natal fidelity to breeding grounds on the population structure of humpback whales Megaptera novae-angliae based on an ocean-wide survey of mitochondrial (mt) DNA diversity in the North Pacific. For 2193 biopsy samples collected from whales in 10 feeding...
Resource Type:: Article

Creator:: Thompson, Sarah Ann, Sydeman, William J., Santora, Jarrod A., Black, Bryan A., Suryan, Robert M., Calambokidis, John, Peterson, William T., and Bograd, Steven J.
Abstract:: Upwelling in eastern boundary current systems is a primary driver of ecosystem productivity. Typically, peak upwelling occurs during spring and summer, but winter upwelling may also be important to ecosystem functions. In this study, we investigated the hypothesis that winter and spring/summer upwelling, operating through indirect trophic interactions, are important...
Resource Type:: Article

Creator:: Norman, Stephanie A., Huggins, Jessie, Carpenter, Tim E., Case, James T., Lambourn, Dyanna M., Rice, Jim, Calambokidis, John, Gaydos, Joseph K., Hanson, M. Bradley, Duffield, Deborah A., Dubpernell, Sandra, Berta, Susan, and Klope, Matt
Abstract:: In 2006–2007, an unusually high number of harbor porpoises (Phocoena phocoena) stranded along the Washington and Oregon coastlines. Spatiotemporal analyses were used to examine their ability to detect clusters of porpoise strandings during an unusual mortality event (UME) in the Pacific Northwest using stranding location data. Strandings were evaluated as...
Resource Type:: Article

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