Biology of the genus Ammodytes, the sand lances
Martin D. Robards, John F. Piatt
Martin D. Robards, Mary F. Willson, Robert H. Armstrong, John F. Piatt, editor(s)
1999, Book chapter, Sand lance: A review of biology and predator relations and annotated bibliography (USDA Forest Service Research Paper PNW-RP-521)
Although much taxonomic confusion exists within the genus Ammodytes, six species are currently recognized: personatus, hexapterus, americanus, dubius, tobianus, and marinus. Sand lance are both euryhaline and eurythermal, as well as tolerant of reduced oxygen concentrations. The absence of a swim bladder allows this narrow, elongate fish to spend much...
Changes in proximate composition and somatic energy content for Pacific sand lance (Ammodytes hexapterus) from Kachemak Bay, Alaska relative to maturity and season
Martin D. Robards, Jill A. Anthony, George A. Rose, John F. Piatt
1999, Journal of Experimental Marine Biology and Ecology (242) 245-258
Mean dry-weight energy values of adult Pacific sand lance (Ammodytes hexapterus) peaked in spring and early summer (20.91 kJg−1 for males, 21.08 kJg−1 for females), then declined by about 25% during late summer and fall (15.91 kJg−1 for males, 15.74 kJg−1 for females). Late summer declines in energy density paralleled...
Seasonal shorebird use of intertidal habitats in Cook Inlet, Alaska
Robert E. Gill Jr., T. Lee Tibbitts
1999, BOEM MMS 99-0012
Seasonal shorebird use of intertidal habitats of Cook Inlet, Alaska, was studied from February 1997 to February 1999 using aerial surveys as the principal method of assessment. On-ground studies were conducted to validate aerial survey results and to assess shorebird use of vegetated habitats, especially during the breeding season. Twenty-eight...
Managing Pacific salmon escapements: The gaps between theory and reality
E. Eric Knudsen
E. Eric Knudsen, Cleveland R. Steward, Donald D. MacDonald, Jack E. Williams, Dudley W. Reiser, editor(s)
1999, Book chapter, Sustainable fisheries management: Pacific salmon
There are myriad challenges to estimating intrinsic production capacity for Pacific salmon populations that are heavily exploited and/or suffering from habitat alteration. Likewise, it is difficult to determine whether perceived decreases in production are due to harvest, habitat, or hatchery influences, natural variation, or some combination of all four. There...
An aerial survey method to estimate sea otter abundance
James L. Bodkin, Mark S. Udevitz
Gerald W. Garner, Steven C. Amstrup, Jeffrey L. Laake, Bryan F.J. Manly, Lyman L. McDonald, Donna G. Robertson, editor(s)
1999, Conference Paper, Marine mammal survey and assessment methods
Sea otters (Enhydra lutris) occur in shallow coastal habitats and can be highly visible on the sea surface. They generally rest in groups and their detection depends on factors that include sea conditions, viewing platform, observer technique and skill, distance, habitat and group size. While visible on the surface, they...
Sand lance: A review of biology and predator relations and annotated bibliography
Martin D. Robards, Mary F. Willson, Robert H. Armstrong, John F. Piatt, editor(s)
1999, Research Paper PNW-RP-521
Six species of sand lance (Ammodytes) in temperate and boreal regions are currently recognized. Sand lance can occupy a wide range of environmental conditions, but all appear to be dormant predominantly in winter, and one species is in summer also. They lack a swim bladder and spend much of their...
Modeling bird mortality associated with the M/V Citrus oil spill off St. Paul Island, Alaska
Paul L. Flint, Ada C. Fowler, Robert F. Rockwell
1999, Ecological Modelling (117) 261-267
We developed a model to estimate the number of bird carcasses that were likely deposited on the beaches of St. Paul Island, Alaska following the M/V Citrus oil spill in February 1996. Most of the islands beaches were searched on an irregular schedule, resulting in the recovery of 876 King...
Discovery of a new Kittlitz's murrelet nest: Clues to habitat selection and nest-site fidelity
John F. Piatt, Nancy L. Naslund, Thomas I. van Pelt
1999, Northwestern Naturalist (80) 8-13
On 13 June 1993, a new Kittlitz's murrelet (Brachyramphus brevirostris) nest was discovered near Red Mountain on the Kenai Peninsula, Alaska. The nest was on a 22° slope at about 900 m elevation with a northeast aspect, and contained a 60.2 × 40.6 mm egg that weighed 49.0 g. Downy...
The adrenocorical stress-response of Black-legged Kittiwake chicks in relation to dietary restrictions
A.S. Kitaysky, John F. Piatt, J.C. Wingfield, M. Romano
1999, Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology (169) 303-310
In this study we examined hormonal responses of Black-legged Kittiwake (Rissatridactyla) chicks to experimental variations in energy content and nutritional quality (low or high lipid to protein ratio, LPR) of their food. Starting at the age of 10 days, chicks were fed either high or low LPR fish at...
Bar-tailed Godwits Limosa lapponica in Alaska: A population estimate from the staging grounds
Robert E. Gill Jr., Brian J. McCaffery
1999, Wader Study Group Bulletin (88) 49-54
Bar-tailed Godwits Limosa lapponica were surveyed on their staging grounds in Alaska during September 1995 and 1997. The single high count of 94,000 birds closely matched that of counts from New Zealand and south-eastern Australia, the known non-breeding area for most of the baueri subspecies. Numbers recorded on the southern...
Stream restoration at Denali National Park and Preserve
Roseann V. Densmore, Kenneth F. Karle
1999, Conference Paper, Proceedings: High altitude revegetation workshop No. 13; Information series no. 89
Placer mining for gold has severely disturbed many riparian ecosystems in northern regions. We are conducting a long-term project to test methods to promote restoration of a placer-mined watershed in Denali National Park and Preserve. The project included hydrological restoration of the unstable and excessively confined stream with heavy equipment....
Multi-year persistence of oil mousse on high energy beaches distant from the Exxon Valdez spill origin
Gail V. Irvine, Daniel H. Mann, Jeffrey W. Short
1999, Marine Pollution Bulletin (38) 572-584
For at least 5 yr after the Exxon Valdez spill, relatively unweathered oil mousse has persisted on the exposed rocky shores of Shelikof Strait 500 km from Prince William Sound, Alaska. Previously it was thought that oil would be rapidly removed from such geomorphic settings by wave action. Oil mousse...
Populations and productivity of seabirds at South Marble Island, Glacier Bay, Alaska, during May-July, 1999
Stephani Zador, John F. Piatt
1999, Report
In the course of directed research on glaucous-winged gulls, we investigated the numbers and activities of all breeding and non-breeding seabirds associated with South Marble Island in Glacier Bay, Alaska, during mid-May to late July, 1999. Most observations were made from the island; additional observations were made during transportation to...
Juvenile Marbled Murrelet nurseries and the productivity index
Kathy J. Kuletz, John F. Piatt
1999, The Wilson Bulletin (111) 257-261
Late summer counts of juveniles at sea are used as an index of Marbled Murrelet (Brachyramphus marmoratus) reproductive success, but little is known about juvenile dispersal or habitat use. Further, it is not known whether these counts accurately reflect absolute breeding success. To address these questions we conducted five boat...
One Northwest community - People, salmon, rivers, and the sea: Towards sustainable salmon fisheries
Donald D. MacDonald, Cleveland R. Steward, E. Eric Knudsen
E. Eric Knudsen, Cleveland R. Steward, Donald MacDonald, Jack E. Williams, Dudley W. Reiser, editor(s)
1999, Book chapter, Sustainable fisheries management: Pacific salmon
Pacific salmon management is in crisis. Throughout their range, salmon and steelhead populations are being adversely affected by human activities. Without coordinated, effective, and timely action, the future of the Pacific salmon resource is most certainly in doubt. To address the challenges that are currently facing salmon management, concerned citizens...
Turnagain Arm
Peter J. Haeussler, L. Dilley
1999, Book chapter, American Institute of Professional Geologists Annual Meeting Field Trip
No abstract available....
Maturation, fecundity, and intertidal spawning of Pacific sand lance in the northern Gulf of Alaska
Martin D. Robards, John F. Piatt, G.A. Rose
1999, Journal of Fish Biology (54) 1050-1068
Pacific sand lance Ammodytes hexapterus in Kachemak Bay, Alaska, showed no sexual dimorphism in length-to-weight (gonad-free) ratio or length-at-age relationship. Most matured in their second year, males earlier in the season than females, but females (31%) attained a higher gonadosomatic index than males (21%). Sand lance spawned intertidally once each...
Modeling variability in replicated surveys at aggregation sites
Mark S. Udevitz
Gerald W. Garner, Steven C. Amstrup, Jeffrey L. Laake, Bryan F.J. Manly, Lyman L. McDonald, Donna G. Robertson, editor(s)
1999, Conference Paper, Marine mammal survey and assessment methods
Surveys of aggregation sites can provide unbiased estimates of annual trends in population size if the proportion of the population counted at these sites does not vary systematically among years. However, counts at these sites tend to be highly variable and resulting trend estimates typically have poor precision. I developed...
Sand lance as cornerstone prey for predator populations
Mary F. Willson, Robert H. Armstrong, Martin D. Robards, John F. Piatt
Martin D. Robards, Mary F. Willson, Robert H. Armstrong, John F. Piatt, editor(s)
1999, Book chapter, Sand lance: A review of biology and predator relations and annotated bibliography (USDA Forest Service Research Paper PNW-RP-521)
Sand lance (Ammodytes) constitute a major prey for at least some populations of over 100 species of consumer, including 40 species of birds, 12 species of marine mammals, 45 species of fishes, and some invertebrates. Variation in the availability of sand lance (and other forage fishes) can have major effects...
Comparison of aerial survey procedures for estimating polar bear density: Results of pilot studies in northern Alaska
Lyman L. McDonald, Gerald W. Garner
Gerald W. Garner, Steven C. Amstrup, Jeffrey L. Laake, Bryan F.J. Manly, Lyman L. McDonald, Donna G. Robertson, editor(s)
1999, Conference Paper, Marine mammal survey and assessment methods
The U.S. Marine Mammal Protection Act (MMPA) and International Agreement on the Conservation of Polar Bears mandate that boundaries and sizes of polar bear (Ursus maritimus) populations be known so they can be managed at optimum sustainable levels. However, data to estimate polar bear numbers for the Chukchi/Bering Sea and...
Setting the stage for a sustainable Pacific salmon fisheries strategy
Donald D. MacDonald, Cleveland R. Steward, E. Eric Knudsen
E. Eric Knudsen, Cleveland R. Steward, Donald D. MacDonald, Jack E. Williams, Dudley W. Reiser, editor(s)
1999, Book chapter, Sustainable fisheries management: Pacific salmon
Salmon and steelhead Oncorhynchus spp., have been keystone species for ecosystems and human cultures of the North American Pacific coast for cons. Yet, in the past century, many populations have been greatly diminished and some are now extinct-the result of a combination of factors, including habitat loss and degradation, overfishing,...
Emperor goose Anser canagicus
Joel A. Schmutz
Janet Kear, editor(s)
1999, Book chapter, Ducks, geese, and swans
No abstract available....
Annotated bibliography
Robert H. Armstrong, Mary F. Willson, Martin D. Robards, John F. Piatt
Martin D. Robards, Mary F. Willson, Robert H. Armstrong, John F. Piatt, editor(s)
1999, Book chapter, Sand lance: A review of biology and predator relations and annotated bibliography (USDA Forest Service Research Paper PNW-RP-521)
This bibliography contains over 1,700 published and unpublished references on the family Ammodytidae with an emphasis on the genus Ammodytes. The references are alphabetical by author and then by year of publication.Abstracts and summaries are included for the references we have seen and those provided electronically by others. Abstracts written...
Stock origins of Dolly Varden collected from Beaufort Sea coastal sites of Arctic Alaska and Canada
C.C. Krueger, R.L. Wilmot, R.J. Everett
1999, Transactions of the American Fisheries Society (128) 49-57
Anadromous northern Dolly Varden Salvelinus malma support a summer subsistence fishery in Beaufort Sea coastal waters. These same waters coincide with areas of oil and gas exploration and development. The purpose of this study was to assess variation in stock origins of Dolly Varden collected from sites along 400...
Alaska resource data file: Big Delta quadrangle
Cameron Rombach
1999, Open-File Report 99-354
No abstract available....
