Publications
USGS research activities relevant to Alaska have yielded more than 9400 historical publications. This page features some of the most recent newsworthy research findings.
Filter Total Items: 2885
Some tests of the "migration hypothesis" for anadromous Dolly Varden (southern form)
Some aspects of a previously described migratory paradigm for the southern form of anadromous Dolly Varden Salvelinus malma were investigated with seven 3‐year mark–recapture experiments on fish that used lakes in eight watersheds as their winter residence. Weirs on Kodiak Island, around Prince William Sound, and near Juneau, Alaska, were used to capture Dolly Varden as they emigrated to the sea e
Authors
David R. Bernard, Kelley R. Hepler, J. Douglas Jones, Mary E. Whalen, Douglas N. McBride
Pattern of shoreline spawning by sockeye salmon in a glacially turbid lake: evidence for subpopulation differentiation
Alaskan sockeye salmon typically spawn in lake tributaries during
summer (early run) and along clear-water lake shorelines and outlet
rivers during fall (late run). Production at the glacially turbid
Tustumena Lake and its outlet, the Kasilof River (south-central
Alaska), was thought to be limited to a single run of sockeye salmon
that spawned in the lake's clear-water tri
Authors
C. V. Burger, J.E. Finn, L. Holland-Bartels
Abundance, distribution and population status of Marbled Murrelets in Alaska
Ship-based surveys conducted throughout Alaska during the 1970's and 1980's, and more recent small boat surveys conducted in the northern Gulf of Alaska, suggest that about 280,000 murrelets reside in Alaska during summer. Most Marbled Murrelets are concentrated offshore of large tracts of coastal coniferous forests in southeast Alaska, Prince William Sound, and the Kodiak Archipelago. About 1-3 p
Authors
John F. Piatt, Nancy L. Naslund
Buff-breasted Sandpiper (Calidris subruficollis)
No abstract available
Authors
Richard B. Lanctot, C.D. Laredo
Oceanic, shelf and coastal seabird assemblages at the mouth of a tidally-mixed estuary (Cook Inlet, Alaska)
No abstract available
Authors
John F. Piatt
Classification of vegetation communities in which geese rear broods on the Yukon-Kuskokwim Delta, Alaska
Plant communities are described from an area on the Yukon – Kuskokwim (Y-K) delta of Alaska that is used extensively for brood rearing by three species of geese. Earlier studies identified plant species important as food for young geese, but few studies describe or quantify plant communities. We classified species presence or absence information from over 700 quadrats using a two-way indicator spe
Authors
Christopher Babcock, Craig R. Ely
Invasive cohorts: Impacts of hatchery-reared coho salmon on the trophic, developmental, and genetic ecology of wild stocks
No abstract available.
Authors
Jennifer L. Nielsen
Navigating aerial transects with a laptop computer
SUMMARY: A comparison is made of different methods of determining size of home range from grid trapping data. Studies of artificial populations show that a boundary strip method of measuring area and an adjusted range length give sizes closer to the true range than do minimum area or observed range length methods. In simulated trapping of artificial populations, the known range size increas
Authors
R. Michael Anthony, R.A. Stehn
Polar bear maternity denning in the Beaufort Sea
The distribution of polar bears (Ursus maritimus) is circumpolar in the Northern Hemisphere, but known locations of maternal dens are concentrated in relatively few, widely scattered locations. Denning is either uncommon or unknown within gaps. To understand effects of industrial development and propose increases in hunting, the temporal and spatial distribution of denning in the Beaufort Sea must
Authors
Steven C. Amstrup, Craig L. Gardner
Seabird population trends along the west coast of North America: Causes and the extent of regional concordance
We compared trends in breeding population size among cormorants, gulls, alcids, and others, among the Farallon Islands, and sites in northern California and Washington, Gulf of Alaska, and Bering Sea, but in most cases only during the last two decades. For a given species, trends were usually concordant within the same oceanographic domain, except for Rhinoceros Auklet, which increased across all
Authors
D. G. Ainley, W.J. Sydeman, Scott A. Hatch, U.W. Wilson
An intersection model for estimating sea otter mortality along the Kenai Peninsula
We developed an intersection model to integrate parameters estimated from three distinct data sets that resulted from the Exxon Valdez oil spill: (1) the distribution,
amount, and movements of spilled oil; (2) the distribution and abundance of sea otters along the Kenai Peninsula; and (3) the estimates of site-specific sea otter
mortality relative to oil exposure from otters captured for rehabil
Authors
James L. Bodkin, Mark S. Udevitz