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Using stable isotopes to determine seabird trophic relationships
1. The stable isotopes of nitrogen (δ 15 N) and carbon (δ 13 C) were analysed in 22 species of marine birds from coastal waters of the northeast Pacific Ocean. Analyses confirm that stable nitrogenExpand
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Community reorganization in the Gulf of Alaska following ocean climate regime shift
A shift in ocean climate during the late 1970s triggered a reorganization of community structure in the Gulf of Alaska ecosystem, as evidenced in changing catch composi- tion on long-term (1953-1997)Expand
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Proximate Composition and Energy Density of Some North Pacific Forage Fishes
Abstract Mature pelagic forage fish species (capelin, sand lance, squid) had greater lipid concentrations than juvenile age-classes of large demersal and pelagic fish species (walleye pollock,Expand
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Dietary restriction causes chronic elevation of corticosterone and enhances stress response in red-legged kittiwake chicks
Abstract. Release of corticosterone in hungry kittiwake chicks facilitates begging and allows them to restore depleted energy reserves by increasing parental food provisioning. However, in order toExpand
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Investigating trophic relationships of pinnipeds in Alaska and Washington using stable isotope ratios of nitrogen and carbon
We measured stable-nitrogen (δ15N) and stable-carbon (δ13C) isotope ratios in muscle and hair from 7 northern fur seals (Callorhinus ursinus) from the Pribilof Islands, Alaska, and 27 Steller seaExpand
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Immediate Impact of the 'Exxon Valdez' Oil Spill on Marine Birds
On 24 March 1989, the oil tanker 'Exxon Valdez' spilled 260,000 barrels of crude oil in Prince William Sound, Alaska. Oil eventually drifted over 30,000 km2 of coastal and offshore waters occupied byExpand
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Benefits and costs of increased levels of corticosterone in seabird chicks
Seabird chicks respond to food shortages by increasing corticosterone (cort) secretion, which is probably associated with fitness benefits and costs. To examine this, we experimentally increasedExpand
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Clonal dynamics in western North American aspen ( Populus tremuloides )
Clonality is a common phenomenon in plants, allowing genets to persist asexually for much longer periods of time than ramets. The relative frequency of sexual vs. asexual reproduction determinesExpand
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Increasing frequency of plastic particles ingested by seabirds in the subarctic North Pacific
Abstract We examined gut contents of 1799 seabirds comprising 24 species collected in 1988–1990 to assess the types and quantities of plastic particles ingested by seabirds in the subarctic waters ofExpand
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Stress hormones link food availability and population processes in seabirds
Catastrophic population declines in marine top predators in the northern Pacific have been hypothesized to result from nutritional stress affecting reproduction and survival of individuals. However,Expand
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