Publications
Filter Total Items: 2078
Field response of tadpoles to conspecific and heterospecific alarm Field response of tadpoles to conspecific and heterospecific alarm
Many organisms use chemical cues from a variety of sources to mediate predator avoidance. Response to heterospecific alarm cues has been demonstrated for tadpoles within but not among taxa and alarm response behavior has seldom been examined under field conditions. This study examined the response of three sympatric amphibian larvae and predaceous larval Dytiscus sp. (diving beetle) to...
Authors
M. J. Adams, S. Claeson
Assessment of air quality and air pollutant impacts in national parks of the Rocky Mountains and northern Great Plains Assessment of air quality and air pollutant impacts in national parks of the Rocky Mountains and northern Great Plains
No abstract available.
Authors
David L. Peterson, T.J. Sullivan, J.M. Eilers, S. Brace, D. Horner
Winter foraging ecology of bald eagles on a regulated river in southwest Idaho Winter foraging ecology of bald eagles on a regulated river in southwest Idaho
We studied Bald Eagle foraging ecology on the South Fork Boise River,Idaho, during the winters of 1990-92. We compared habitat variables at 29 foraging sites, 94 perch sites, and 131 random sites.Habitat variables included river habitat (pool, riffle, run), distance to the nearest change in river habitat, distance to nearest available perch, number and species of surrounding perches, and...
Authors
Gregory S. Kaltenecker, Karen Steenhof, Marc J. Bechard, James C. Munger
A comparison of small-mammal communities in a desert riparian floodplain A comparison of small-mammal communities in a desert riparian floodplain
We compared small-mammal communities between inactive floodplain and actively flooded terraces of riparian habitat in the Verde Valley of central Arizona. We used species diversity, abundance, weight of adult males, number of juveniles, number of reproductively active individuals, longevity, residency status, and patterns of microhabitat use to compare the two communities. Although...
Authors
Laura E. Ellison, Charles van Riper
Mitigation of habitat "take" and the core area concept Mitigation of habitat "take" and the core area concept
No abstract available.
Authors
J. Buchanan, R.J. Fredrickson, D.E. Seaman
Influence of habitat, sex, age, and drought on the diet of Townsend's ground squirrels Influence of habitat, sex, age, and drought on the diet of Townsend's ground squirrels
We assayed diets of Townsend's ground squirrels (Spermophilus townsendii) in a semi-arid shrub steppe in Idaho by analyzing 1,432 fecal samples during 1991–1994. Dietary composition differed between adults and juveniles but not between males and females. Sand-berg's bluegrass (Poa secunda), a perennial bunchgrass, was the most common item in diets. Diets varied among habitats that...
Authors
Beatrice Van Horne, Robert L. Schooley, Peter B. Sharpe
Organochlorine pesticides, PCBs, and mercury in hawk, falcon, eagle, and owl eggs from the Lipetsk, Voronezh, Novgorod and Saratov regions, Russia, 1992-1993 Organochlorine pesticides, PCBs, and mercury in hawk, falcon, eagle, and owl eggs from the Lipetsk, Voronezh, Novgorod and Saratov regions, Russia, 1992-1993
Fifty-two eggs (one per nest) of 12 species of raptors were collected in 1992-93 for contaminant analysis in three southern European locations in Russia. One Peregrine Falcon (Falco peregrinus) egg was also collected farther northwest in the Novgorod region. A high DDE concentration (27.3 ppm, wet weight [w/w]) in the Peregrine Falcon egg raised concern for the species in European Russia...
Authors
Charles J. Henny, S.A. Ganusevich, F.P. Ward, T.R. Schwartz, A.L. Mischenko, V.N. Moseikin, V.S. Sarychev
Effects of pesticides on Canada Geese Effects of pesticides on Canada Geese
This paper summarizes published and unpublished sources relating to exposure of Canada geese (Branta canadensis) to pesticides, emphasizing documented episodes of poisoning by organochlorine (OC), organophosphorus (OP), and carbamate compounds. Canada geese accumulate the lipid-soluble OC compounds, although they have a lower potential for biomagnification of these pesticides than...
Authors
L. J. Blus
Diet and morphology of extant and recently extinct northern bears Diet and morphology of extant and recently extinct northern bears
I examined the relationship of diets to skull morphology of extant northern bears and used this information to speculate on diets of the recently extinct cave (Ursus spelaeus) and short-faced (Arctodus simus) bears. Analyses relied upon published skull measurements and food habits of Asiatic (U. thibetanus) and American (U. americanus) black bears, polar bears (U. maritimus), various...
Authors
David J. Mattson
Large-scale fire disturbance: From concepts to models Large-scale fire disturbance: From concepts to models
No abstract available.
Authors
D. L. Peterson
Stenocybe fragmenta, a new species of Mycocaliciaceae with fragmenting spores Stenocybe fragmenta, a new species of Mycocaliciaceae with fragmenting spores
The new species Stenocybe fragmenta (Ascomycota, Mycocaliciaceae) is described from western North America. The species was collected from twigs of Cercocarpus montanus and Rhamnus purshiana. Stenocybe fragmenta is characterized by 5–7 septate, 18–30 μm long ascospores that fragment at maturity. This is the first report of spore fragmentation among the Mycocaliciaceae.
Authors
E.B. Peterson, Jouko Rikkinen