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: 3105
Habitat selection models for Pacific sand lance (Ammodytes hexapterus) in Prince William Sound, Alaska Habitat selection models for Pacific sand lance (Ammodytes hexapterus) in Prince William Sound, Alaska
We modeled habitat selection by Pacific sand lance (Ammodytes hexapterus) by examining their distribution in relation to water depth, distance to shore, bottom slope, bottom type, distance from sand bottom, and shoreline type. Through both logistic regression and classification tree models, we compared the characteristics of 29 known sand lance locations to 58 randomly selected sites...
Authors
William D. Ostrand, Tracey A. Gotthardt, Shay Howlin, Martin D. Robards
Oceanographic conditions structure forage fishes into lipid-rich and lipid-poor communities in lower Cook Inlet, Alaska, USA Oceanographic conditions structure forage fishes into lipid-rich and lipid-poor communities in lower Cook Inlet, Alaska, USA
Forage fishes were sampled with a mid-water trawl in lower Cook Inlet, Alaska, USA, from late July to early August 1996 to 1999. We sampled 3 oceanographically distinct areas of lower Cook Inlet: waters adjacent to Chisik Island, in Kachemak Bay, and near the Barren Islands. In 163 tows using a mid-water trawl, 229437 fishes with fork length
Authors
Alisa A. Abookire, John F. Piatt
Alaska resource data file: Port Alexander quadrangle, Alaska Alaska resource data file: Port Alexander quadrangle, Alaska
No abstract available.
Authors
Donald J. Grybeck
Distribution of pelagic forage fishes in relation to the oceanography of Glacier Bay Distribution of pelagic forage fishes in relation to the oceanography of Glacier Bay
No abstract available.
Authors
Mayumi L. Arimitsu, John F. Piatt, Marc D. Romano, David C. Douglas
Nonlinear dynamics in ecosystem response to climatic change: Case studies and policy implications Nonlinear dynamics in ecosystem response to climatic change: Case studies and policy implications
Many biological, hydrological, and geological processes are interactively linked in ecosystems. These ecological phenomena normally vary within bounded ranges, but rapid, nonlinear changes to markedly different conditions can be triggered by even small differences if threshold values are exceeded. Intrinsic and extrinsic ecological thresholds can lead to effects that cascade among...
Authors
Virginia R. Burkett, Douglas A. Wilcox, Robert Stottlemyer, Wylie Barrow, Dan Fagre, Jill Baron, Jeff Price, Jennifer L. Nielsen, Craig D. Allen, David L. Peterson, Greg Ruggerone, Thomas Doyle
Verification of sex from harvested sea otters using DNA testing Verification of sex from harvested sea otters using DNA testing
We used molecular genetic methods to determine the sex of 138 sea otters (Enhydra lutris) harvested from 3 regions of Alaska from 1994 to 1997, to assess the accuracy of post‐harvest field‐sexing. We also tested each of a series of factors associated with errors in field‐sexing of sea otters, including male or female bias, age‐class bias, regional bias, and bias associated with hunt
Authors
Kim T. Scribner, Ben A. Green, Carol Gorbics, James L. Bodkin
Spatial and temporal variations in the age structure of Arctic sea ice Spatial and temporal variations in the age structure of Arctic sea ice
Spatial and temporal variations in the age structure of Arctic sea ice are investigated using a new reverse chronology algorithm that tracks ice-covered pixels to their location and date of origin based on ice motion and concentration data. The Beaufort Gyre tends to harbor the oldest (>10 years old) sea ice in the western Arctic while direct ice advection pathways toward the Transpolar...
Authors
G. I. Belchansky, David C. Douglas, Nikita G. Platonov
Biology and conservation of Xantus's Murrelet: Discovery, taxonomy and distribution Biology and conservation of Xantus's Murrelet: Discovery, taxonomy and distribution
The biology of Xantus's Murrelets Synthliboramphus hypoleucus is similar in many respects to better-studied Ancient Murrelets S. antiquus, especially regarding morphology and the species' precocial mode of post-hatching development. It nests mainly in rock crevices but also under shrubs on islands in southern California, United States, and northwestern Baja California, Mexico (27oN to...
Authors
Harry R. Carter, Spencer G. Sealy, Esther E. Burkett, John F. Piatt
Nomenclature of mitochondrial DNA haplotypes for Oncorhynchus mykiss Nomenclature of mitochondrial DNA haplotypes for Oncorhynchus mykiss
Congruence of genetic data is critical for comparative and collaborative studies on natural fish populations. A comprehensive list of reported mitochrondrial DNA haplotypes for Oncorhynchus mykiss generated using the S‐Phe/P2 primer set is presented as a resource for future investigations of this species.
Authors
Sara L. Graziano, K. H. Brown, Jennifer L. Nielsen
Alaska resource data file: Sitka quadrangle, Alaska Alaska resource data file: Sitka quadrangle, Alaska
No abstract available.
Authors
Henry C. Berg, Donald J. Grybeck
Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska
Volcanogenic massive sulfide (VMS) deposits on Prince of Wales Island and vicinity in southeastern Alaska are associated with Late Proterozoic through Cambrian volcanosedimentary rocks of the Wales Group and with Ordovician through Early Silurian felsic volcanic rocks of the Moira Sound unit (new informal name). The massive sulfide deposits in the Wales Group include the Big Harbor...
Authors
Robert A. Ayuso, Susan M. Karl, John F. Slack, Peter J. Haeussler, Peter E. Bittenbender, Gregory A. Wandless, Anna Colvin
Alaska resource data file: Seward quadrangle, Alaska Alaska resource data file: Seward quadrangle, Alaska
No abstract available.
Authors
Jeff A. Huber, Carol S. Huber