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: 3107
Proximate composition and energy density of some North Pacific forage fishes Proximate composition and energy density of some North Pacific forage fishes
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, Pacific cod, Atka mackerel, greenling, prowfish, rockfish, sablefish). Myctophids preyed on by puffins have at least twice as much lipid per gram compared to mature capelin, sand lance and squid, and an...
Authors
Thomas I. van Pelt, John F. Piatt, Brian K. Lance, Daniel D. Roby
Water Resources Data for Alaska, Water Year 1996 Water Resources Data for Alaska, Water Year 1996
Water resources data for the 1996 water year for Alaska consist of records of stage, discharge, and water quality of streams; stages of lakes; and water levels and water quality of ground water. This volume contains records for water discharge at 85 gaging stations; stage or contents only at 5 gaging stations; water quality at 19 gaging stations; and water levels for 49 observation wells...
Authors
K.R. Linn, S.K. Shaw, W.C. Swanner, R. L. Rickman, M.F. Schellekens
Field guide to the Mesozoic accretionary complex along Turnagain Arm and Kachemak Bay, south-central Alaska Field guide to the Mesozoic accretionary complex along Turnagain Arm and Kachemak Bay, south-central Alaska
Turnagain Arm, just east of Anchorage, provides a readily accessible, world-class cross section through a Mesozoic accretionary wedge. Nearly continuous exposures along the Seward Highway, the Alaska Railroad, and the shoreline of Turnagain Arm display the two main constituent units of the Chugach terrane: the McHugh Complex and Valdez Group. In this paper we describe seven bedrock...
Authors
Dwight Bradley, Timothy M. Kusky, Susan M. Karl, Peter J. Haeussler
Distribution and stability of eelgrass beds at Izembek Lagoon, Alaska Distribution and stability of eelgrass beds at Izembek Lagoon, Alaska
Spatial change in eelgrass meadows, Zostera marina L., was assessed between 1978 and 1987 and between 1987 and 1995 at Izembek Lagoon, Alaska. Change in total extent was evaluated through a map to map comparison of data interpreted from a 1978 Landsat multi-spectral scanner image and 1987 black and white aerial photographs. A ground survey in 1995 was used to assess spatial change from...
Authors
David H. Ward, Carl J. Markon, David C. Douglas
Alaska resource data file: Killik River quadrangle Alaska resource data file: Killik River quadrangle
No abstract available.
Authors
Karen D. Kelley
Alaska resource data file: Misheguk Mountain quadrangle Alaska resource data file: Misheguk Mountain quadrangle
No abstract available.
Authors
J. H. Dover
Alaska resource data file: Coleen quadrangle Alaska resource data file: Coleen quadrangle
No abstract available.
Authors
J. H. Dover
Alaska resource data file: Christian quadrangle Alaska resource data file: Christian quadrangle
No abstract available.
Authors
J. H. Dover
Adaptation of a stage-projection model for species with multiple year reproductive cycles Adaptation of a stage-projection model for species with multiple year reproductive cycles
We apply stage projection matrices to multiple age and reproductive categories, deriving the stable age - reproductive category distribution for populations with multi-year reproductive cycles and identifying conditions for the existence of a dominant latent root. Given the stable distribution of age and reproductive category and the number of female young for each reproductive category...
Authors
James R. Gilbert, Mark S. Udevitz
Seasonal and annual survival of adult Pacific brant Seasonal and annual survival of adult Pacific brant
Declining mid-winter counts of Pacific brant (Branta bernicla nigricans) and reduced numbers of nesting birds on their main breeding grounds prompted us to assess factors that may be limiting recovery of this population. We estimated seasonal and annual survival rates of adult brant in 1986-93 from resightings of leg-banded birds. Brant were banded at a major colony on the Yukon...
Authors
David H. Ward, Eric A. Rexstad, James S. Sedinger, Mark S. Lindberg, Neil K. Dawe
Investigating trophic relationships of pinnipeds in Alaska and Washington using stable isotope ratios of nitrogen and carbon 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 sea lions (Eumetopias jubatus), and 14 harbor seals (Phoca vitulina) from the Gulf of Alaska and coast of Washington State, in order to contrast dietary information derived from isotopic vs...
Authors
Keith A. Hobson, John L. Sease, Richard L. Merrick, John F. Piatt
Hematological and plasma biochemical reference ranges of Alaskan seabirds: Their ecological significance and clinical importance Hematological and plasma biochemical reference ranges of Alaskan seabirds: Their ecological significance and clinical importance
Blood was analyzed from 151 pelagic marine birds to establish reference ranges for hematological and plasma biochemical parameters from healthy, wild populations of Pacific seabirds. Of the 13 species examined, 9 were from the Family Alcidae (N = 122 individuals) and the remainder (N = 29) from the Families Phalacrocoracidae, Laridae, and Procellariidae. Three of 8 hematological...
Authors
S. H. Newman, John F. Piatt, J. White