David M. Leslie Jr., C. L. Douglas
1980, Technical Report CPSU/UNLV 010/12
No abstract available at this time...
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Publication Extents
Not all publications have extents, not all extents are completely accurateF.B. Turner, P.A. Medica, C.L. Lyons
1980, Report
No abstract available at this time...
R.J. Jameson, B. Csuiti
1980, Report
No abstract available at this time...
J. W. van Wagtendonk
1980, Journal of Travel Research (19) 12-17
After several years of dramatic increases, visitor use in Yosemite National Park has leveled off to an average of 2.4 million visits per year. Coincident with this decline in the growth rate, there have been some changes in visitation trends and patterns. Data collected in the park show that the...
R. R. Smith, M. C. Peterson, A. C. Allred
1980, Progressive Fish-Culturist (42) 195-199
Fecal excretions were collected from rainbow trout (Salmo gairdneri) in metabolism chambers. In this method of collection the daily excretion is suspended in about 1 L of water. Aliquots of the suspension were separated into solid and liquid fractions by settling, centrifuging, or filtering. Solid and liquid fractions and the...
R. M. Windingstad, R. M. Duncan, R.L. Drieslein
1980, Transactions of the Wisconsin Academy of Sciences, Arts, and Letters (68) 208-211
Avian botulism was responsible for the death of over 6,000 waterfowl at Horicon National Wildlife Refuge in Wisconsin in 1978. The outbreak occurred in early fall on a flooded 250 hectare fallow agricultural area on the northeast end of the refuge. The species most severely affected was the green-winged teal...
D. E. Docherty, D.J. Henning
1980, Avian Diseases (24) 278-283
A viral agent, identified as a herpesvirus and tentatively called 'inclusion body disease of cranes' (IBDC), was isolated from captive cranes involved in a die-off at the International Crane Foundation near Baraboo, Wisconsin. Preliminary animal susceptibility tests, based on experimental infections, suggested that White Pekin ducklings up to 17 days...
J. W. van Wagtendonk, J.M. Benedict
1980, Journal of Forestry (78) 399-401
In Yosemite National Park, 92 percent of the parties using back country areas had permits. Parties without permits were smaller in size and stayed for shorter periods of time. For all parties with permits, 62 percent made changes to their trips. Parties changing their trips in both time and...
J. W. van Wagtendonk, J.M. Benedict
1980, Journal of Leisure Research (12) 99-106
Numerous interrelated factors influence the travel times of hikers and riders on backcountry trails. This study sought to quantify those factors which were thought to be most important in affecting trail speeds. The travel times of 897 backpacking parties, 634 day hiking parties, and 111 riding parties were obtained from...
P.A. Medica
1980, Herpetological Review (11) 42
Wayne I. Jensen, Ruth M. Duncan
1980, Journal of Wildlife Diseases (16) 11-14
Bordetella bronchiseptica was isolated from the lungs of all of six mountain voles (Microtus montanus) found dead or dying of pulmonary infection near the Bear River Research Station in northern Utah in January, 1973. The possibility of concomitant viral or mycoplasmal infection was not ruled out....
G. L. Hoffman
1980, Fisch und Umwelt (Fish and Environment) (8) 69-75
No abstract available at this time...
S. F. Snieszko
1980, Fisch und Umwelt (Fish and Environment) (8) 1-17
R. K. Stroud, M.E. Roelke
1980, Journal of Wildlife Diseases (16) 15-18
Salmonella enteritidis was isolated from the brain of a neonatal northern fur seal (Callorhinus ursinus) with gross and microscopic lesions of meningoencephalomyelitis. Microscopic lesions in the liver and lung suggested septicemia....
C. A. Faanes, H.A. Kantrud
1980, Prairie Naturalist (12) 124-125
Review of: Birds of the Great Plains: breeding species and their distribution. Paul A. Johnsgard. Lincoln: University of Nebraska Press, 1979. ISBN: 0803225504....
David R. Wolfert
1980, New York Fish and Game Journal (27) 88-90
To test the reliability of current techniques, five biologists appraised the ages of 200 quail from a random sample of wings collected during the 1952-53 hunting season in Alabama. Attempt was made to distinguish adults from juveniles, to ascertain the stage of post-nuptial and post-juvenile molts, and to estimate the...
R. M. Windingstad, M.E. McDonald, Louis N. Locke, S.M. Kerr, J.A. Sinn
1980, Avian Diseases (24) 1044-1049
A coccidiosis epizootic has occurred in lesser scaup (Aythya affinis) at Bluestem Reservoir in eastern Nebraska during the spring in each of three recent years: 1976-1978. Losses peaked during the period from mid-March through April. As much as 29% of the peak population of scaup using the reservoir died. Necropsies...
M.E. Havlik, L. L. Marking
1980, Bulletin of American Malacological Union 30-34
The Prairie du Chien dredge material site contains about 100,000 cubic meters of material dredged from the East Channel of the Mississippi Riverin1976. Previous studies in that area suggested a rich molluscan fauna, but most studies were only qualitative or simply observations. Our study of this material was designed...
F. P. Meyer, R. A. Schnick
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 2093-2102
Abstract has not been submitted...
John H. Howell, John J. Lech, John L. Allen
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 2103-2107
Larvicides are used to control sea lamprey (Petromyzon marinus) in the Great Lakes. These larvicides are useful because they are more toxic to sea lamprey than fish species found in the same habitat. The lampricides come from two classes of chemical compounds: (1) halonitrophenols, and (2) halonitrosalicylanilides. Selectivity of the...
P.A. Gilderhus, B. G. H. Johnson
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 1895-1905
The chemicals 3-trifluoromethyl-4-nitrophenol (TFM) or a combination of TFM and 2a??,5-dichloro-4a??-nitrosalicylanilide (Bayer 73) have been used to control the sea lamprey (Petromyzon marinus) in the Great Lakes for about 20 yr. These chemicals cause some mortalities of Oligochaeta and Hirudinea, immature forms of Ephemeroptera (Hexagenia sp.), and certain Trichoptera, Simuliidae,...
D.S. Gilmer, E.A. Work Jr., J.E. Colwell, D.L. Rebel
1980, Photogrammetric Engineering and Remote Sensing (46) 631-634
A method is described for making an estimate of wetland numbers in the glaciated prairie region. A double-phase sampling approach is used which consists of first making a total census of wetlands using Landsat data, and then adjusting the Landsat results on the basis of samples derived from high resolution...
Douglas H. Johnson
1980, Ecology (61) 65-71
Modern ecological research often involves the comparison of the usage of habitat types or food items to the availability of those resources to the animal. Widely used methods of determining preference from measurements of usage and availability depend critically on the array of components that the researcher, often with a...
Mary C. Rabbitt
1980, Book
In the traditional view of the Survey's first 25 years, which are the subject of much of this volume, John Wesley Powell, with his broad view of science and advanced ideas of land and water in the West, is the heroic figure. Clarence King is dismissed as brilliant but with...
Richard L. Pycha
1980, Canadian Journal of Fisheries and Aquatic Sciences (37) 2063-2073
Total mortality rates of lake trout (Salvelinus namaycush) of age VII and older from eastern Lake Superior were estimated from catch curves of age distributions each year in 1968–78. The instantaneous rate of total mortality Z varied from 0.62 to 2.31 in close synchrony with sea lamprey (Petromyzon marinus) wounding rates on lake...