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Page 4793, results 119801 - 119825

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Potential impacts of agricultural chemicals on waterfowl and other wildlife inhabiting prairie wetlands: An evaluation of research needs and approaches
C.E. Grue, L.R. DeWeese, P. Mineau, G.A. Swanson, J.R. Foster, P.M. Arnold, J.N. Huckins, P.J. Sheenan, W.K. Marshall, A.P. Ludden
1986, Transactions of the North American Wildlife and Natural Resources Conference (51) 357-383
The potential for agricultural chemicals to enter prairie-pothole wetlands and impact wildlife dependent on these wetlands for survival and reproduction appears to be great. However, the actual risk to wetland wildlife from the inputs of these chemicals cannot be adequately assessed at this time, because of insufficient data. Available data...
Effect of Orthene on an unconfined population of the meadow vole (Microtus pennsylvanicus)
David A. Jett, James D. Nichols, James E. Hines
1986, Canadian Journal of Zoology (64) 243-250
The possible impact on Microtus pennsylvanicus of ground applications of Orthene® insecticide was investigated in old-field habitats in northern Maryland during 1982 and 1983. The treatment grids in 1982 and 1983 were sprayed at 0.62 and 0.82 kg active ingredient/ha, respectively. A capture–recapture design robust to unequal capture probabilities was utilized to estimate population...
Radiotelemetry locates wintering grounds of DDE-contaminated black-crowned night-herons
Charles J. Henny, L. J. Blus
1986, Wildlife Society Bulletin (14) 236-241
This study was designed to determine if night-herons nesting at Ruby Lake, Nevada, shared a common wintering area with lesser contaminated night-herons nesting farther north in Oregon and Idaho. Radiotelemetry (29 transmitters) and banding studies indicated that the lesser-contaminated Oregon-Idaho night-herons wintered primarily in coastal Mexico (mean 22-23'N latitude), while...
Sources of variation in extinction rates, turnover, and diversity of marine invertebrate families during the Paleozoic
J.D. Nichols, R.W. Morris, C. Brownie, K. H. Pollock
1986, Paleobiology (12) 421-432
We have recently shown how capture-recapture models can be used in conjunction with stratigraphic range data to estimate taxonomic extinction rates and taxonomic diversity. Here we present a new method that can be used to estimate taxonomic turnover (defined here as the proportion of taxa extant at...
Hatching success of Caspian terns nesting in the lower Laguna Madre, Texas, USA
C. A. Mitchell, T. W. Custer
1986, Colonial Waterbirds (9) 86-89
The average clutch size of Caspian Terns nesting in a colony in the Lower Laguna Madre near Laguna Vista, Texas, USA in 1984 was 1.9 eggs per nest. Using the Mayfield method for calculating success, one egg hatched in 84.1% of the nests and 69.8% of the eggs laid hatched....
An overview of raptor conservation in Latin America
D. H. Ellis, D.G. Smith
1986, Birds of Prey Bulletin (3) 21-25
Prior to the last decade, biological studies of raptorial birds in Latin America were almost nonexistent. For many species little more was known than their general range and habitat type. The last few years have seen the opening of a door to what will surely be a flood of scientific...
Antibodies against canine parvovirus of wolves of Minnesota: A serologic study from 1975 through 1985
S.M. Goyal, L.D. Mech, R.A. Rademacher, M.A. Khan, U.S. Seal
1986, Journal of the American Veterinary Medical Association (189) 1092-1094
Serum samples (n = 137) from 47 wild wolves (Canis lupus; 21 pups and 26 adults) were evaluated from 1975 to 1985 for antibodies against canine parvovirus, using the hemagglutination inhibition (HI) test. In addition, several blood samples (n = 35) from 14 of these wolves (6 pups and 8...
Effects of liberalized harvest regulations on wood ducks in the Atlantic Flyway
Fred A. Johnson, J.E. Hines, Frank Montalbano III, J.D. Nichols
1986, Wildlife Society Bulletin (14) 383-388
Beginning in 1977the FWS provided southern Atlantic Flyway states the opportunity to liberalize wood duck harvest regulations. Harvest subsequently increased throughout the flyway but appeared to be more a function of population growth than changes in regulations. In the South, harvest rate increased only slightly for young males and no...
The use of natural vs. man-modified wetlands by shorebirds and waterbirds
R. Michael Erwin, Malcolm Coulter, H. Cogswell
1986, Colonial Waterbirds (9) 137-138
The loss of wetlands continues world-wide. The impact especially has been felt in coastal areas, but water management elsewhere has resulted in marked reductions of aquatic bird populations. Concern for wetland management led to the convocation of a symposium on waterbird and shorebird use of natural and man-modified...
Organochlorine contaminants in passeriformes and other avian prey of the peregrine falcon in the western United States
L.R. DeWeese, L. C. McEwen, Gary L. Hensler, B.E. Petersen
1986, Environmental Toxicology and Chemistry (5) 675-693
About 1,150 individuals of 38 species of Passeriformes and other small birds were collected in 1980 at 36 locations in eight western U.S. states for organochlorine (OC) chemical analysis. The bird carcasses (less beak, tarsi, gastrointestinal tract, and feathers) were combined by species and location (4 to 15 specimens per...
Cholinesterase inhibition in meadow voles (Microtus Pennsylvanicus) following field applications of orthene®
David A. Jett
1986, Environmental Toxicology and Chemistry (5) 255-259
Brain acetylcholinesterase activity in field-caught meadow voles (Microtus pennsylvanicus) was depressed after a field-spray of Orthene® (acephate: acetylphosphoramidothioic acid O,S-dimethyl ester) by as much as 32% in 1982 and 38% in 1983. Short-term recovery was demonstrated and occurred in a time-dependent fashion in 1982. Plasma Cholinesterase levels were more variable but...
Dieldrin and endrin residues in fulvous whistling-ducks in Texas in 1983
Edward L. Flickinger, C. A. Mitchell, A. J. Krynitsky
1986, Journal of Field Ornithology (57) 85-90
Fulvous Whistling-Ducks were collected near nesting areas in the rice fields of Texas in 1983 to determine if these birds continue to carry residue levels of organochlorine contaminants, and if the contaminants were acquired in Texas or Mexico. Adults were collected immediately after they arrived from wintering grounds and juveniles...
Winter distribution and oiling of common terns in Trinidad: A further look
R.M. Erwin, G. J. Smith, R. B. Clapp
1986, Journal of Field Ornithology (57) 300-308
Common Terns were studied during January and March 1985 in Trinidad as part of wintering terns in Latin America. Eighty-nine birds were captured, 33 in January, 56 in March. Terns averaged 102 .+-. 0.9 g, with March birds weighing more than those caught in January. This weight is similar...