—North American waterfowl winter throughout a large geographic area, and the choice of wintering site has a direct impact on survival and fitness. Climatic and food variables are the most commonly cited factors influencing abundance and distribution of wintering migratory birds, including waterfowl. We conducted stratified aerial surveys at a northern latitude wintering site, Great Salt Lake (G...

The atmospheric transport and deposition of aerosols has the potential to influence the chemistry and biology of oligotrophic alpine lakes. In recent decades, dust and nitrogen emissions to alpine ecosystems have increased across large areas of the western U.S., including Wyoming. Here, we use sediment geochemistry and Sr/Sr and Nd/Nd isotopes to examine historical dust deposition rates to alpi...

An attempt was made to identify the olfactory cues produced by Douglas-fir seeds which attract deer mice (Peromyscus maniculatus) to the seeds. The olfactometers used are described, and the merits of different statistical analyses of the data are discussed. The odors produced by whole Douglas-fir seed and by the endosperm were preferred among the fractions tested to date. Deer mice were repelle...

Introduction: Impact crater densities (craters/km2) have allowed successful estimate of planetary surface ages and survival times of topography on modified surfaces [1–3]. Malin et al. recently reported a breakthrough observation: formation rate of small (~20 m) Martian craters [4]. If correct, this will allow even more direct age measurement. History of Technique: The technique was introduced ...

—Invasions of nonnative species are a leading cause of the loss of populations of cutthroat trout Oncorhynchus clarki in the western United States, but effective control of invasions of species such as brook trout Salvelinus fontinalis are expensive, labor intensive, and not species specific. Because salmonids respond to chemical cues, we hypothesized that pheromonal attraction could be exploit...

T summer of 1949 was long and dry in Montana. On the afternoon of August 5th—the hottest day ever recorded in the state—a lightning fire was spotted in a remote area of pine forest. A parachute brigade of fifteen firefighters known as smoke jumpers was dispatched to put out the blaze; the man in charge was named Wag Dodge. When the jumpers left Missoula, in a C-47 cargo plane, they were told th...

Prof. Carlos G. Duran (Fig 1) passed away on his 85th birthday, June 11th. He and his wife had returned to their family home in Bilbao this spring due to his failing health. Prof. Duran was born in Tetuan, Morocco in 1932 as the son of a Belgian mother and a Spanish father who was a general surgeon. Prof. Duran completed his M.D. at Madrid University in 1956, followed by a residency in General ...

Correspondence to: Ira Byock, MD, Director, Promoting Excellence in End-of-Life Care, a national program of The Robert Wood Johnson Foundation Practical Ethics Center, University of Montana, 1000 E. Beckwith Avenue, Missoula, MT 59812; telephone (406) 243-6601; fax (406) 243-6633; e-mail: [email protected] symptoms that erode their quality of life. They are often anxious and justifiably worried ab...

-I observed the foraging behavior of four warbler species (Dendroica petechia, Oporornis tolmiei, Geothlypis trichas, and Wilsonia pusilla) in the summer in Wyoming and in the winter in Nayarit, Mexico. Of six variables (absolute foraging height, relative foraging height, vegetation density, horizontal foraging position, feeding method, and foraging substrate) believed to be potentially importa...

—We studied the consequences of nest-site choice on nesting success under differing disturbance levels for the Rufous-bellied Thrush (Turdus rufiventris). We compared nest-site choice and nest success between a disturbed site and an undisturbed site in a montane subtropical forest in northwestern Argentina. We found no overall difference in daily predation rate (DPR) between the disturbed and u...