Index Catalog // ScholarsArchive@OSU

Late spring and summer patterns of euphausiid reproduction in Southeast Alaska fjord waters

Creator:: Szabo, Andrew R. and Batchelder, Harold P.
Abstract:: Abundance, size and development stage data for furcilia and juvenile euphausiids and data on timing and prevalence of attached spermatophores on adult females are used to infer spawning times by four euphausiid species in Frederick Sound and lower Stephens Passage, Southeast Alaska. Results from net tows conducted between late May...
Resource Type:: Article
Full Text:: ALASKA FJORD WATERS 2 3 Andrew R. Szabo*, Alaska Whale Foundation, 4739 University Way NE 1239

Winter dispersal and activity patterns of post-breeding black-legged kittiwakes Rissa tridactyla from Prince William Sound, Alaska

Creator:: McKnight, Aly, Irons, David B., Allyn, Andrew J., Sullivan, Kelsey M., and Suryan, Robert M.
Abstract:: As colony-specific wintering ecology of small and medium-sized seabirds is poorly understood, it has been generally assumed that winter conditions have the same effect on all individuals from any given colony. However, advances in global positioning technology now allow researchers to investigate movements of smaller seabirds. We tracked black-legged kittiwakes...
Resource Type:: Article
Full Text:: , Alaska Aly McKnight1,*, David B. Irons1, Andrew J. Allyn2, Kelsey M. Sullivan3, Robert M. Suryan4 1US

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:: production type Andrew M. Claiborne1,*, Jessica A. Miller2, Laurie A. Weitkamp3, David J. Teel4, Robert L

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:: fur seals closely matches the hierarchical patch scales of prey Kelly J. Benoit-Bird1,*, Brian C

Uptake and utilization of 'colloidal DOM' by heterotrophic flagellates in seawater

Creator:: Tranvik, Lars J., Sherr, Evelyn, and Sherr, Barry F.
Abstract:: A variety of macromolecules labeled with FITC (fluorescein isothiocyanate), including carbohydrates (dextran) and proteins (ferritin, casein, albumin, concavalin A), spanning a range of molecular weights from 55 to 2000 kD, were actively ingested by marine heterotrophic flagellates at substrate concentrations of 1 to 10 mg/L. The uptake capacity for the...
Resource Type:: Article
Full Text:: flagellates in seawater Lars J. ~ r a n v i k ' , E. B. sherr2, B. F. sherr2 'Dept of Ecology, Limnology

Contrasting effects of hypoxic conditions on survivorship of planktonic larvae of rocky intertidal invertebrates

Creator:: Eerkes-Medrano, Dafne, Menge, Bruce A., Sislak, Christine, and Langdon, Christopher J.
Abstract:: Hypoxia is increasing in coastal zones worldwide, with acute effects on demersal fish and benthic invertebrate communities in shallow coastal and estuarine habitats. Less studied are the effects of hypoxia on planktonic larvae of open coastal habitats. Climate change projections suggest intensified hypoxia in open coast upwelling systems, such as...
Resource Type:: Article
Full Text:: ,*, Bruce A. Menge1, Christine Sislak3, Christopher J. Langdon2 1Department of Zoology, 3029 Cordley Hall

Active acoustic examination of the diving behavior of murres foraging on patchy prey

Creator:: Benoit-Bird, Kelly J., Kuletz, Kathy, Heppell, Scott, Jones, Nathan, and Hoover, Brian
Abstract:: During the 2008 and 2009 breeding seasons of murres Uria spp., we combined visual observations of these predators with active acoustics (sonar), fish trawls, zooplankton net tows, and hydrographic measurements in the area surrounding breeding colonies in the southeastern Bering Sea. We acoustically detected thousands of bubble trails that were...
Resource Type:: Article
Full Text:: murres foraging on patchy prey Kelly J. Benoit-Bird1,*, Kathy Kuletz2, Scott Heppell3, Nathan Jones4

Mussel selectivity for high-quality food drives carbon inputs into open-coast intertidal ecosystems

Creator:: Bracken, Matthew E. S., Menge, Bruce A., Foley, Melissa M., Sorte, Cascade J. B., Lubchenco, Jane, and Schiel, David R.
Abstract:: Filter-feeding invertebrates consume phytoplankton and detritus and therefore serve as important mediators of the exchange of materials from nearshore pelagic to intertidal benthic ecosystems. Here, we evaluated the linkages between nearshore and intertidal systems on temperate rocky reefs on the coasts of Oregon, USA, and New Zealand’s South Island. We...
Resource Type:: Article
Full Text:: , Melissa M. Foley4, Cascade J. B. Sorte5, Jane Lubchenco3, David R. Schiel6 1Marine Science Center

Differential feeding by marine flagellates on growing versus starving, and on motile versus nonmotile, bacterial prey

Creator:: Gonzalez, Juan M., Sherr, Evelyn, and Sherr, Barry F.
Abstract:: Previous work has demonstrated selective feeding by bacterivorous protists on the of prey size. Other prey characteristics may also affect protist grazing rates. In this relative uptake rates of fluorescently labeled bacterial (FLB) cells made from starving bacteria (S-FLB), and of live-stained motile vs non-motile bacteria by marine We also...
Resource Type:: Article
Full Text:: helpful comments on the manuscnpt. LITERATURE CITED Adler, J . (1975). Bacterial chemotaxis. A. Rev

Digestive enzyme activity as a quantitative measure of protistan grazing: the acid lysozyme assay for bacterivory

Creator:: Gonzalez, Juan M., Sherr, Barry F., and Sherr, Evelyn
Abstract:: We propose quantification of the activity of digestive enzymes as a novel way to estimate rates of protist grazing in natural waters. Our first application of this approach was determination of protistan bacterivory by assaying the activity of lysozyme at acid pH. Lysozyme specifically degrades peptidoglycan, a major structural component...
Resource Type:: Article
Full Text:: Bay water 6 J u n e 1992 1040 0.161 f 0 026 0.81 k 0.10 26 July 1992 630 0.090 + 0 028 0.27 f 0.08

ScholarsArchive@OSU

Late spring and summer patterns of euphausiid reproduction in Southeast Alaska fjord waters

Winter dispersal and activity patterns of post-breeding black-legged kittiwakes Rissa tridactyla from Prince William Sound, Alaska

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

Uptake and utilization of 'colloidal DOM' by heterotrophic flagellates in seawater

Contrasting effects of hypoxic conditions on survivorship of planktonic larvae of rocky intertidal invertebrates

Active acoustic examination of the diving behavior of murres foraging on patchy prey

Mussel selectivity for high-quality food drives carbon inputs into open-coast intertidal ecosystems

Differential feeding by marine flagellates on growing versus starving, and on motile versus nonmotile, bacterial prey

Digestive enzyme activity as a quantitative measure of protistan grazing: the acid lysozyme assay for bacterivory

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