Search Results - "Heintz, Ron A."

Long-Term Ecological Impacts from Oil Spills: Comparison of Exxon Valdez , Hebei Spirit , and Deepwater Horizon by Barron, Mace G, Vivian, Deborah N, Heintz, Ron A, Yim, Un Hyuk

“…The long-term ecological impacts of the oil spill (EVOS) are compared to two extensively studied and more recent large spills: Deepwater Horizon (DWH) and the…”
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Return of warm conditions in the southeastern Bering Sea: Phytoplankton - Fish by Duffy-Anderson, Janet T, Stabeno, Phyllis J, Siddon, Elizabeth C, Andrews, Alex G, Cooper, Daniel W, Eisner, Lisa B, Farley, Edward V, Harpold, Colleen E, Heintz, Ron A, Kimmel, David G, Sewall, Fletcher F, Spear, Adam H, Yasumishii, Ellen C

“…In 2014, the Bering Sea shifted back to warmer ocean temperatures (+2 oC above average), bringing concern for the potential for a new warm stanza and broad…”
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Spatial match-mismatch between juvenile fish and prey provides a mechanism for recruitment variability across contrasting climate conditions in the eastern Bering Sea by Siddon, Elizabeth Calvert, Kristiansen, Trond, Mueter, Franz J, Holsman, Kirstin K, Heintz, Ron A, Farley, Edward V

“…Understanding mechanisms behind variability in early life survival of marine fishes through modeling efforts can improve predictive capabilities for…”
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Climate change-informed dietary modeling in Pacific cod: Experimentally-derived effects of temperature and dietary quality on carbon and nitrogen stable isotope trophic discrimination factors by Rogers, Matthew C, Heintz, Ron A, Vollenweider, Johanna J, Sreenivasan, Ashwin, Miller, Katharine B

“…Stable isotope analysis is a powerful tool for dietary modeling and trophic ecology research. A crucial piece of information for isotopic dietary modeling is…”
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Climate impacts on eastern Bering Sea foodwebs: a synthesis of new data and an assessment of the Oscillating Control Hypothesis by Hunt, George L., Coyle, Kenneth O., Eisner, Lisa B., Farley, Edward V., Heintz, Ron A., Mueter, Franz, Napp, Jeffrey M., Overland, James E., Ressler, Patrick H., Salo, Sigrid, Stabeno, Phyllis J.

“…Hunt, G. L., Coyle, K. O., Eisner, L. B., Farley, E. V., Heintz, R. A., Mueter, F., Napp, J. M., Overland, J. E., Ressler, P. H., Salo, S., and Stabeno, P. J…”
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Sensitivity of fish embryos to weathered crude oil: Part II. Increased mortality of pink salmon (Oncorhynchus gorbuscha) embryos incubating downstream from weathered Exxon valdez crude oil by Heintz, Ron A., Short, Jeffrey W., Rice, Stanley D.

“…We incubated pink salmon embryos under three exposure conditions, direct contact with oil‐coated gravel, effluent from oil‐coated gravel, and direct contact…”
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Correlation between recruitment and fall condition of age-0 pollock (Theragra chalcogramma) from the eastern Bering Sea under varying climate conditions by Heintz, Ron A., Siddon, Elizabeth C., Farley, Edward V., Napp, Jeffrey M.

“…Fishery managers require an understanding of how climate influences recruitment if they are to separate the effects of fishing and climate on production. The…”
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Conceptual model of energy allocation in walleye pollock (Theragra chalcogramma) from age-0 to age-1 in the southeastern Bering Sea by Siddon, Elizabeth C., Heintz, Ron A., Mueter, Franz J.

“…Walleye pollock (Theragra chalcogramma) support the largest commercial fishery in the United States and are an ecologically important component of the…”
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Seasonal cycles in whole-body proximate composition and energy content of forage fish vary with water depth by Vollenweider, Johanna J, Heintz, Ron A, Schaufler, Lawrence, Bradshaw, Robert

“…Quantifying the nutritional quality of forage fish is integral for understanding upper trophic levels as forage fish are the dominant prey for top predator…”
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Size, diet, and condition of age-0 Pacific cod (Gadus macrocephalus) during warm and cool climate states in the eastern Bering sea by Farley, Edward V., Heintz, Ron A., Andrews, Alex G., Hurst, Thomas P.

“…The revised Oscillating Control Hypothesis for the Bering Sea suggests that recruitment of groundfish is linked to climatic processes affecting seasonal sea…”
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Distribution, diet, and energetic condition of age-0 walleye pollock (Gadus chalcogrammus) and pacific cod (Gadus macrocephalus) inhabiting the Gulf of Alaska by Moss, Jamal H., Zaleski, Marilyn F., Heintz, Ron A.

“…Walleye pollock (Gadus chalcogrammus) and Pacific cod (Gadus macrocephalus) are commercially and ecologically important species in Alaska waters. Little is…”
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Confronting assumptions about prey selection by lunge‐feeding whales using a process‐based model by Chenoweth, Ellen M., Boswell, Kevin M., Friedlaender, Ari S., McPhee, Megan V., Burrows, Julia A., Heintz, Ron A., Straley, Jan M.

“…The relative energetic benefits of foraging on one type of prey rather than another are not easily measured, particularly for large free‐ranging predators…”
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Marine Subsidies in Freshwater: Effects of Salmon Carcasses on Lipid Class and Fatty Acid Composition of Juvenile Coho Salmon by Heintz, Ron A., Nelson, Bonita D., Hudson, John, Larsen, Marie, Holland, Larry, Wipfli, Mark

“…Returning adult salmon represent an important source of energy, nutrients, and biochemicals to their natal streams and may therefore have a quantitative effect…”
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Implications of trophic discrimination factor selection for stable isotope food web models of low trophic levels in the Arctic nearshore by Barton, Mark B., Litvin, Steven Y., Vollenweider, Johanna J., Heintz, Ron A., Norcross, Brenda L., Boswell, Kevin M.

“…Stable isotope analysis (SIA) has become a useful tool to investigate food web structures in Arctic marine ecosystems. This method requires assumptions about…”
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Influence of size on the sources of energy consumed by overwintering walleye pollock ( Theragra chalcogramma) by Heintz, Ron A., Vollenweider, Johanna J.

“…The critical size hypothesis proposes the risks of winter mortality are greatest for small individuals in fish populations. This results from size-dependent…”
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Energetic Cost of Ichthyophonus Infection in Juvenile Pacific Herring (Clupea pallasii) by Vollenweider, Johanna J., Gregg, Jake L., Heintz, Ron A., Hershberger, Paul K.

“…The energetic costs of fasting and Ichthyophonus infection were measured in juvenile Pacific herring (Clupea pallasii) in a lab setting at three temperatures…”
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Ontogenetic and spatial variability in trophic biomarkers of juvenile saffron cod (Eleginus gracilis) from the Beaufort, Chukchi and Bering Seas by Copeman, Louise A., Laurel, Benjamin J., Boswell, Kevin M., Sremba, Angie L., Klinck, Karolin, Heintz, Ron A., Vollenweider, Johanna J., Helser, Thomas E., Spencer, Mara L.

“…Climate models indicate the Arctic will undergo dramatic environmental change with forecasted increases in temperature and river runoff. Saffron cod ( Eleginus…”
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Temporal and Age‐Based Variation in Juvenile Sablefish Diet Composition and Quality: Inferences from Stomach Contents and Stable Isotopes by Callahan, Matthew W., Beaudreau, Anne H., Heintz, Ron A., Mueter, Franz J., Rogers, Matthew C.

“…Prey communities in the North Pacific Ocean have been disrupted by marine heatwaves, and reductions in forage fishes have had notable impacts on…”
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Latitudinal dependence of body condition, growth rate, and stable isotopes of juvenile capelin (Mallotus villosus) in the Bering and Chukchi Seas by Barton, Mark B., Moran, John R., Vollenweider, Johanna J., Heintz, Ron A., Boswell, Kevin M.

“…Capelin occupy a key trophic role and have a broad latitudinal distribution in the northeastern Pacific and Arctic Oceans. Understanding their adaptation to a…”
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Chronic Exposure to Polynuclear Aromatic Hydrocarbons in Natal Habitats Leads to Decreased Equilibrium Size, Growth, and Stability of Pink Salmon Populations by Heintz, Ron A

“…The immediate and delayed effects of embryonic exposure to low levels of polynuclear aromatic hydrocarbons (PAHs) have been shown to reduce survival to…”
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