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Ocean habitat use in autumn by Chinook salmon in coastal waters of Oregon and California

Creator:: Hinke, Jefferson T., Watters, George M., Boehlert, George W., and Zedonis, Paul
Abstract:: Describing the ocean habitats used by Chinook salmon Oncorhynchus tshawytscha is an important step towards understanding how environmental conditions influence their population dynamics. We used data from archival tags that recorded time, temperature and pressure (depth) to define the coastal habitats used by Chinook near Oregon and California during the...
Resource Type:: Article
Full Text:: waters of Oregon and California Jefferson T. Hinke1, 2,*, George M. Watters2, George W. Boehlert3, Paul

Proximity to multiple foraging habitats enhances seabirds’ resilience to local food shortages

Creator:: Paredes, Rosana, Harding, Ann M. A., Irons, David B., Roby, Daniel D., Suryan, Robert M., Orben, Rachael A., Renner, Heather, Young, Rebecca, and Kitaysky, Alexander
Abstract:: As central-place foragers, seabirds from colonies located close to multiple and/or productive marine habitats might experience increased foraging opportunities and enhanced resilience to food shortages. We tested whether this hypothesis might explain divergent trends in 3 populations of black-legged kittiwakes Rissa tridactyla, a surface-feeding piscivore, in the eastern Bering Sea....
Resource Type:: Article
Full Text:: recaptured within 2 to 4 d (Bogoslof: 2.25 ± 0.04 d; St. Paul: 2.24 ± 0.04 d; St. George: 2.94 ± 0.05 d

Scale-dependent detection of the effects of harvesting a marine fish population

Creator:: Bartolino, Valerio, Ciannelli, Lorenzo, Spencer, Paul, Wilderbuer, Thomas K., and Chan, Kung-Sik
Abstract:: Certain ecological processes dominate others at particular scales, and the response of populations to exogenous and endogenous forces are typically scale dependent. In spite of this central role played by scale, the temporal and spatial scales of human impacts on ecosystems and populations remain almost unknown. We applied a multiscale...
Resource Type:: Article
Full Text:: effects of harvesting a marine fish population Valerio Bartolino1,2,*, Lorenzo Ciannelli3, Paul Spencer4

Stable isotope values delineate the non-breeding distributions of sooty shearwaters Puffinus griseus in the North Pacific Ocean

Creator:: Thompson, David R., Torres, Leigh G., Taylor, Graeme A., Rayner, Matt J., Sagar, Paul M., Shaffer, Scott A., Phillips, Richard A., and Bury, Sarah J.
Abstract:: Following breeding, sooty shearwaters Puffinus griseus leave New Zealand waters and migrate to 1 of 3 distinct areas in the North Pacific Ocean, effectively exploiting environmental resources across a large proportion of this northern ocean basin. In this study, we combined electronic tracking technology with stable isotope analyses (δ¹⁵N and...
Resource Type:: Article
Full Text:: North Pacific Ocean David R. Thompson1,*, Leigh G. Torres1,2, Graeme A. Taylor3, Matt J. Rayner4, Paul

Larval development of Euphausia pacifica in the laboratory: variability in developmental pathways

Creator:: Feinberg, Leah R., Shaw, C. Tracy, and Peterson, William T.
Abstract:: Gravid adult female Euphausia pacifica were collected off Newport, Oregon, USA and transferred to the laboratory, where females spawned eggs, eggs hatched, and larvae were reared at 10.5 degrees C. We fed 4 cohorts of larvae to excess with a combination of phytoplankton species and monitored them daily until they...
Resource Type:: Article
Full Text:: significantly faster than the others. Median time to the juvenile stage ranged from 51.9 to 60.6 d, with

Consequence of a superabundance of larval walleye pollock Theragra chalcogramma in the Gulf of Alaska in 1981

Creator:: Duffy-Anderson, J. T., Bailey, Kevin Mclean, and Ciannelli, Lorenzo
Abstract:: Abundances of larval walleye pollock in Shelikof Strait, Gulf of Alaska, in 1981 were far greater than any recorded estimates before that time or since (some patch estimates exceeded 100000 larvae per 10 m²). In spite of this extraordinary input, the ensuing 1981 year class was relatively poor. An examination...
Resource Type:: Article
Full Text:: resources in Shelikof Strait in a relatively short period of time (14 to 40 d). Our observations contrast

When is bigger better? Early marine residence of middle and upper Columbia River spring Chinook salmon

Creator:: Tomaro, Londi M., Teel, David J., Peterson, William T., and Miller, Jessica A.
Abstract:: Early ocean residence is considered a critical period for juvenile salmon although specific survival mechanisms are often unidentified and may vary by species or life stage. Columbia River spring-run Chinook salmon Oncorhynchus tshawytscha abundance has declined dramatically since the early 1900s. To elucidate mechanisms of early marine survival, we tested...
Resource Type:: Article
Full Text:: across 8 yr between 1998 and 2008. Size at capture and marine growth rate after ~30 d marine residence

Evidence for selective mortality in marine environments: the role of fish migration size, timing, and production type

Creator:: Claiborne, Andrew M., Miller, Jessica A., Weitkamp, Laurie A., Teel, David J., and Emmett, Robert L.
Abstract:: The underlying causes of mortality during critical life stages of fish are not well understood, nor is it clear if these causes are similar for naturally versus artificially propagated (i.e. hatchery) individuals. To assess the importance of selective mortality related to production type (hatchery vs. naturally produced) and size at...
Resource Type:: Article
Full Text:: estuary (87%) had arrived within 3 d of capture. In 1 of 2 yr, timing of marine entry for both production

Foraging behavior of northern fur seals closely matches the hierarchical patch scales of prey

Creator:: Benoit-Bird, Kelly J., Battaile, Brian C., Nordstrom, Chad A., and Trites, Andrew W.
Abstract:: Marine prey often occur in hierarchical mosaics whereby small, high-density patches are nested inside of larger, lower density aggregations. We tested the extent to which the foraging behavior of a marine predator (northern fur seal Callorhinus ursinus) could be explained by the hierarchical patch structure of a dominant prey species...
Resource Type:: Article
Full Text:: edge of the Bering Sea shelf, St. George and St. Paul islands (part of the Pribilof Archipelago) serve

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

Creator:: Sogard, Susan M. and Olla, Bori L.
Abstract:: The effects of reduced food availability on the behavior of juvenile walleye pollock Theragra chalcogramma were examined in laboratory experiments designed to test for potential energy-conserving responses. Groups of juvenile fish were held on 1 of 6 ration treatments ranging from ad libitum to near starvation, and then vertical distribution...
Resource Type:: Article
Full Text:: Gradual 10% BW d-l for 10 d Expts 1, 2 Expt 3 2 5": BW d-' for 10 d Expt l Expt 3 0 5% BW d" for 10 d

ScholarsArchive@OSU

Ocean habitat use in autumn by Chinook salmon in coastal waters of Oregon and California

Proximity to multiple foraging habitats enhances seabirds’ resilience to local food shortages

Scale-dependent detection of the effects of harvesting a marine fish population

Stable isotope values delineate the non-breeding distributions of sooty shearwaters Puffinus griseus in the North Pacific Ocean

Larval development of Euphausia pacifica in the laboratory: variability in developmental pathways

Consequence of a superabundance of larval walleye pollock Theragra chalcogramma in the Gulf of Alaska in 1981

When is bigger better? Early marine residence of middle and upper Columbia River spring Chinook salmon

Evidence for selective mortality in marine environments: the role of fish migration size, timing, and production type

Foraging behavior of northern fur seals closely matches the hierarchical patch scales of prey

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

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