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Wood duck population trends from the North American Breeding Bird Survey
The North American Breeding Bird Survey (BBS) has been conducted yearly since 1966, and can be used to describe relative population density and trends of birds in North America north of Mexico. Wood ducks (Air sponsa) are difficult to survey using conventional waterfowl monitoring techniques, but a large portion of their range is surveyed by the...Fredrickson, Leigh H.; Burger, George V.; Havera, Stephen P.; Graber, David A.; Kirby, Ronald E.; Taylor, T. Scott; Sauer, J.R.; Droege, S.
Elk in Olympic National Park: Will they persist over time?
No abstract available.Houston, D.B.; Schreiner, Edward G.; Moorhead, Bruce B.; Krueger, K.A.
Influences of adjacent forest management activities on migratory elk of Mount Rainier National Park: Final report
No abstract available.Jenkins, Kurt J.; Starkey, Edward E.
Rise and fall of endrin usage in Washington state fruit orchards: Effects on wildlife
A study of the effects of endrin on wildlife was conducted from 1981 to 1983 in fruit orchards in central Washington State. The single post-harvest application of endrin as a rodenticide resulted in both acute and chronic toxicity to a variety of avian species. Of 194 birds found dead, brains of 125 were analysed; endrin toxicosis accounted for...Blus, L.J.; Henny, Charles J.; Grove, Robert A.
Effects of livestock grazing on eaptors with Emphasis on the southwestern U.S.
No abstract availableKochert, Michael N.; Millsap, B.A.; Steenhof, K.
Energetic constraints on winter habitat selection by cervids in Glacier National Park
No abstract available.Jenkins, K.J.; Wright, R.G.
Roosevelt elk density in old-growth forests of Olympic National Park
We explored the feasibility of censusing Roosevelt elk from a helicopter in the dense old growth forests of Olympic National Park. WA. Mean observed densities ranged from 8.0-11.6 elk/km2, with coefficients of variation averaging 19.9 percent. A provisional sightability factor of 74 percent suggested that actual mean densities ranged from 10.8-16....Houston, D.B.; Moorhead, Bruce B.; Olson, R.W.
Use of miniroutes and Breeding Bird Survey data to estimate abundance
1. Information on relative abundance is easily obtained and adds greatly to the value of an atlas project. 2. The Breeding Bird Survey (BBS) provides annual counts (birds per 50 roadside stops) that can be used to: (1) map relative abundance by physiographic region within a state or province, (2) map relative abundance on a more local scale by...Robbins, C.S.; Dowell, B.A.
Organochlorine-induced mortality and residues in long-billed curlews from Oregon
In order to determine possible sources of vitamin A for quail, 37 species of insects and other invertebrates were analyzed for vitamin A and for carotene, and 26 species of seeds and fruits were assayed for carotene. The invertebrates showed no trace of vitamin A; but 8 herbivorous invertebrates and the praying mantis contained carotene. Most of...Blus, L.J.; Henny, Charles J.; Krynitsky, A.J.
Elk and deer diets in old-growth forests in western Washington
Dietary quality and overlap of sympatric Roosevelt elk (Cervus elaphus roosevelti) and Columbian black-tailed deer (Odocoileus hemionus columbianus) were investigated in old-growth forests of the Hoh Valley, Olympic National Park, Washington. Diets of both cervids were comprised mainly of common old-growth flora, particularly in winter. High...Leslie, David M.; Starkey, Edward E.; Vavra, Martin
A comparison of Oregon pellet and fish-meat diets for administration of sulfamethazine to Chinook salmon
The absorption of sulfamethazine by yearling spring chinook salmon (Oncorhynchus tshawytscha) was compared when administered in the Oregon Pellet and a fish-meat diet. The pelleted diet delivered the drug to the fish approximately twice as efficiently as the fish-meat diet. Dosage levels are recommended for both diets, and the efficacy of...Amend, D.F.; Fryer, J.L.; Pilcher, K.S.