Publications
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Population estimates of Nearctic shorebirds Population estimates of Nearctic shorebirds
Estimates are presented for the population sizes of 53 species of Nearctic shorebirds occurring regularly in North America, plus four species that breed occasionally. Shorebird population sizes were derived from data obtained by a variety of methods from breeding, migration and wintering areas, and formal assessments of accuracy of counts or estimates are rarely available. Accurate...
Authors
R. I. G. Morrison, Robert E. Gill, B. A. Harrington, S. K. Skagen, G. W. Page, C. L. Gratto-Trevor, S. M. Haig
First-year movements by juvenile Mexican spotted owls in the Canyonlands of Utah First-year movements by juvenile Mexican spotted owls in the Canyonlands of Utah
We studied first-year movements of Mexican Spotted Owls (Strix occidentalis lucida) during natal dispersal in canyonlands of southern Utah. Thirty-one juvenile Mexican Spotted Owls were captured and radiotracked during 1992-95 to examine behavior and conduct experiments related to the onset of natal dispersal. Juvenile Spotted Owls dispersed from their nest areas during September to...
Authors
D.W. Willey, Charles van Riper
Macromoths of northwest forests and woodlands Macromoths of northwest forests and woodlands
The macromoths are a group of families within the order Lepidoptera. The macromoths in the woodlands and forests of the Pacific Northwest are represented by 1,200 species in 12 families: Arctiidae, Dioptidae, Drepanidae, Epiplemidae, Geometridae, Lasiocampidae, Lymantriidae, Noctuidae, Notodontidae, Saturniidae, Sphingidae, and Thyatiridae. In addition to the macromoths, the Lepidoptera...
Authors
Jeffrey C. Miller, Paul C. Hammond
Field evaluation of lead effects on Canada geese and mallards in the Coeur d'Alene River Basin, Idaho Field evaluation of lead effects on Canada geese and mallards in the Coeur d'Alene River Basin, Idaho
Hatch year (HY) mallards (Anas platyrhynchos) in the Coeur d'Alene (CDA) River Basin had higher concentrations of lead in their blood than HY Western Canada geese (Branta canadensis moffitti) (geometric means 0.98 versus 0.28 μg/g, wet weight). The pattern for adults of both species was similar, although geometric means (1.77 versus 0.41 μg/g) were higher than in HY birds. HY mallards...
Authors
Charles J. Henny, L. J. Blus, D. J. Hoffman, L. Sileo, Daniel J. Audet, Mark R. Snyder
Activity patterns of marbled murrelets in Douglas-fir old-growth forests of the Oregon Coast Range Activity patterns of marbled murrelets in Douglas-fir old-growth forests of the Oregon Coast Range
We monitored activity patterns of Marbled Murrelets (Brachyramphus marmoratus) on a near-daily basis using audio-visual surveys during three breeding seasons at five forest stands in the Oregon Coast Range. Three measures of activity were recorded: number of daily detections, number of daily vocalizations, and duration of daily activity. Each measure was highly variable within and among...
Authors
Patrick G.R. Jodice, Michael W. Collopy
Status of a broadly distributed endangered species: Results and implications of the second International Piping Plover Census Status of a broadly distributed endangered species: Results and implications of the second International Piping Plover Census
Methods for monitoring progress toward recovery goals are highly variable and may be problematic for endangered species that are mobile and widely distributed. Recovery objectives for Piping Plovers (Charadrius melodus) include attainment of minimum population sizes within specified recovery units, as determined by two U.S. and two Canadian recovery teams. To assess progress toward these...
Authors
Jonathan H. Plissner, Susan M. Haig
Abundance, behavior and mortality of Buteo swainsoni near San Francisco, Cordoba, Argentina in 1997 Abundance, behavior and mortality of Buteo swainsoni near San Francisco, Cordoba, Argentina in 1997
No abstract available.
Authors
Michael I. Goldstein, Marc J. Bechard, Melissa L. Parker, Michael N. Kochert, Agustin E. Lanusse
Growth and demographics of a population of Emydoidea blandingii from western Nebraska Growth and demographics of a population of Emydoidea blandingii from western Nebraska
No abstract available.
Authors
David J. Germano, R. Bruce Bury
Viability of piping plover Charadrius melodus metapopulations Viability of piping plover Charadrius melodus metapopulations
The metapopulation viability analysis package, VORTEX, was used to examine viability and recovery objectives for piping plovers Charadrius melodus, an endangered shorebird that breeds in three distinct regions of North America. Baseline models indicate that while Atlantic Coast populations, under current management practices, are at little risk of near-term extinction, Great Plains and...
Authors
Jonathan H. Plissner, Susan M. Haig
A late Holocene paleoecological record from Torrey Pines State Reserve, California A late Holocene paleoecological record from Torrey Pines State Reserve, California
Paleoenvironments of the Torrey Pines State Reserve were reconstructed from a 3600-yr core from Los Peñasquitos Lagoon using fossil pollen, spores, charcoal, chemical stratigraphy, particle size, and magnetic susceptibility. Late Holocene sediments were radiocarbon dated, while the historical sediments were dated using sediment chemistry, fossil pollen, and historical records. At 3600 yr...
Authors
Kenneth L. Cole, Eugene Wahl
Chlorophyll maxima in mountain ponds and lakes, Mount Rainier National Park, Washington State, USA Chlorophyll maxima in mountain ponds and lakes, Mount Rainier National Park, Washington State, USA
Hypolimnetic chlorophyll maxima are common in clear lakes and often occur at depths with between 1 and 0.1% of the surface incident light. Little is known, however, about the concentrations of chlorophyll in thermally unstratified mountain ponds and how these concentrations compare to epilimnetic and hypolimnetic concentrations in mountain lakes. The objectives of this study were to...
Authors
Gary L. Larson