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Articles 11401 - 11430 of 12146
Full-Text Articles in Life Sciences
Seed-Eating Birds, H. R. Pulliam
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Memorandum
No abstract provided.
Plant Food Habits Of Rodents In Curlew Valley, E. L. Becker Ii, D. F. Balph, M. H. Balph
Plant Food Habits Of Rodents In Curlew Valley, E. L. Becker Ii, D. F. Balph, M. H. Balph
Memorandum
No abstract provided.
Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman
Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman
Memorandum
No abstract provided.
Rodent Seed-Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown, D. W. Davidson
Rodent Seed-Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown, D. W. Davidson
Memorandum
No abstract provided.
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, J. E. Kinnear, T. L. Ackerman, H. O. Hill
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, J. E. Kinnear, T. L. Ackerman, H. O. Hill
Memorandum
No abstract provided.
Primary Production And Carbon Allocation In Creosotebush: Validation Of The Model, G. L. Cunningham, J. F. Reynolds
Primary Production And Carbon Allocation In Creosotebush: Validation Of The Model, G. L. Cunningham, J. F. Reynolds
Memorandum
No abstract provided.
Jornada Validation Site Report, W. G. Whitford
Tucson Basin Validation Site Report, J. L. Thames
Rock Valley Validation Site Report, F. B. Turner
Impact Of Grazing On Foothill Vegetation, K. C. Hodgkinson, P. S. Johnson
Impact Of Grazing On Foothill Vegetation, K. C. Hodgkinson, P. S. Johnson
Memorandum
No abstract provided.
User's Manual For Desert2: A Desert Ecosystem Simulator Written In Ansi Fortran Iv, W. D. Valentine
User's Manual For Desert2: A Desert Ecosystem Simulator Written In Ansi Fortran Iv, W. D. Valentine
Memorandum
No abstract provided.
Managing Water-Repellent Soils, D A. Mcghie
Managing Water-Repellent Soils, D A. Mcghie
Journal of the Department of Agriculture, Western Australia, Series 4
A study of water-repellent soils has led to some management recommendations.
Erosion Risks With High Stocking Rates At Kojonup Trial, Department Of Agriculture, Western Australia
Erosion Risks With High Stocking Rates At Kojonup Trial, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
A pasture grazing trial at Kojonup dramatically illustrated the effects of Cyclone Alby. Severe erosion was evident on the heavily stocked plots while the more lightly stocked plots showed little damage.
The Distribution Of Cadmium, Chromium And Lead In Crabs, Clams And Oysters From Calcasieu Estuary, Louisiana, Fritz Jaenike
The Distribution Of Cadmium, Chromium And Lead In Crabs, Clams And Oysters From Calcasieu Estuary, Louisiana, Fritz Jaenike
Masters Theses
In November 1978, specimens of oysters (Crassostrea virginica), clams (Rangia cuneata), crabs (Callinectes sapidus) and water and sediment samples were collected from Calcasieu Estuary, Louisiana. The concentrations of cadmium, chromium and lead were determined in the samples with an inductively coupled argon plasma direct reading emission spectrophotometer. Crab claw muscle, gill and carapace tissues were analyzed separately. Oysters and clams were separated into shell and whole soft tissue samples which were analyzed separately. The concentration order of the metals in crab carapace and in oyster shells was similar to that of the sediments, (Pb …
Potential Use Of Hydroelectric Facilities For Manipulating The Fertility Of Lake Mead, Larry J. Paulson, John R. Baker, James E. Deacon
Potential Use Of Hydroelectric Facilities For Manipulating The Fertility Of Lake Mead, Larry J. Paulson, John R. Baker, James E. Deacon
Publications (WR)
Analysis of historical nutrient data for Lake Mead indicates that the fertility of the reservoir has decreased which may be the cause for a corresponding decline in the largemouth bass population. However, it appears that fertility can be manipulated by altering the operation of the dam. The depletion of nutrients in the euphotic zone by phytoplankton and subsequent accumulation in the hypolimnion during summer and fall provide a natural nutrient gradient from which water of varying fertility can be drawn for discharge. This combined with alterations in the depth or seasonal pattern of discharge can possibly be used to enhance …
Niobrara-Missouri River Fishery Investigations, Larry W. Hesse, Gene Zeurlein, Roger Vancil, Leonard Koziol, Brad Newcomb, Leigh Ann Retelsdorf
Niobrara-Missouri River Fishery Investigations, Larry W. Hesse, Gene Zeurlein, Roger Vancil, Leonard Koziol, Brad Newcomb, Leigh Ann Retelsdorf
Nebraska Game and Parks Commission: Publications
The Niobrara River heads in the table lands of eastern Wyoming and flows 786 kilometers (km) eastward across Nebraska joining the Missouri River near the town of Niobrara, Nebraska. The Niobrara is the largest Missouri River tributary between the last two mainstem impoundments (Lake Francis Case and Lewis and Clark Lake). Fish movement up the Niobrara is prevented by Nebraska Public Power District's (NPPD's) Spencer Hydroelectric Dam, 63.3 km upstream from the river mouth. The lower reach of the river is turbid and carries a considerable load of sand, silt, and organic debris into the Missouri River. The mean annual …
Nebraska Rainbow Trout, Nebraska Game And Parks, G. Zeurlein, L. Hesse, J. Seeb, L. Wishard
Nebraska Rainbow Trout, Nebraska Game And Parks, G. Zeurlein, L. Hesse, J. Seeb, L. Wishard
Nebraska Game and Parks Commission: Publications
Chapter 1 Lethal and Preferred Temperatures of Lake McConaughy Rainbow Trout Versus Domestic Strain Rainbow Trout By R. Vancil, G. Zuerlein and L. Hesse
Chapter 2 A Nitrifying Filter-Cooling Condenser System for Total Water Re-use in Cold-Water Fish Holding or Rearing Applications By L. Hesse, G. Zuerlein and R. Vancil
Chapter 3 Biochemical Genetic Analysis of Two Strains of Nebraska Rainbow Trout By J. Seeb and L. Wishard
The self-sustaining rainbow trout population living in Lake Mcconaughy and the North Platte River tributaries is unique to the Great Plains region. The population spends most of its adult life in the …
Saving The State From Rabbits, Department Of Agriculture, Western Australia
Saving The State From Rabbits, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
A thoughtful look at the rise and fall of rabbit populations in Western Astralia and the work done to achive the current levels.
Grain Crop Variety Trials Western Australia 1978-1979, H. M. Fisher, G. B. Crosbie
Grain Crop Variety Trials Western Australia 1978-1979, H. M. Fisher, G. B. Crosbie
Grain and other field crops research reports
The regional crop variety testing programme conducted by the Western Australian Department of Agriculture covers the final two stages of a four stage process of evaluating locally produced crossbreds and introduced material comprising:-
Plant Breeder Trials
Stage 1: Initial small plot yield tests on early generation material - 1 to 3 sites. Stage 2: Small plot yield tests on selected material (F5 derived) - 3 to 4 sites.
Regional Testing Programme
Stage 3: Large scale preliminary trials - 9 to 10 sites. Stage 4: Large scale final yield trials - 40 to 50 sites.
The basis of the regional programme …
Sand Dune Project Stabilises Erosion, Department Of Agriculture, Western Australia
Sand Dune Project Stabilises Erosion, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
Read how the Department of Agriculture's Soil Conservation Service and the Department of Conservation and Environment worked with the Rockingham Shire to upgrade the road and protect the sand dunes.
Contour Cultivation : Cheap Erosion Control, T R. Negus, B. Barrett
Contour Cultivation : Cheap Erosion Control, T R. Negus, B. Barrett
Journal of the Department of Agriculture, Western Australia, Series 4
Although the benefits of contour cultivation are well recognised, it makes cultivation more difficult, particularly if the paddock is split by contour banks and grassed waterways. However, a comparison east of Pingelly indicates that contour cultivation is little more expensive or time-consuming than ordinary cultivation.
Additional Comments On Reproductive Strategies And Population Fluctuations In Microtine Rodents, Michael S. Gaines, William M. Schaffer, Robert K. Rose
Additional Comments On Reproductive Strategies And Population Fluctuations In Microtine Rodents, Michael S. Gaines, William M. Schaffer, Robert K. Rose
Biological Sciences Faculty Publications
Recently, Schaffer and Tamarin (1973) proposed a model relating changes in reproductive effort (RE) to fluctuating densities in microtine rodents (lemmings and voles). They assumed (and presented data supporting this assumption) that the major effect of increased crowding would be a reduction in survival among prereproductives, thereby lowering the effective fecundity (Schaffer and Rosenzweig 1977) of their parents. As a consequence, Schaffer and Tamarin argued that the optimal reproductive expenditure, E(N), should decline with increasing population size, N. They also deduced the shape of the zero-growth isocline, N*(E), for differing levels of RE and plotted both E(N) and N*(E) on …
The Prairie Naturalist Volume 10, Number 4. December 1978
The Prairie Naturalist Volume 10, Number 4. December 1978
The Prairie Naturalist
THE ORNITHOGEOGRAPHY OF THE GREAT PLAINS STATES ▪ Paul A. Johnsgard
CAPTURE OF GRAY PARTRIDGE BY FALCONRY IN NORTH DAKOTA ▪ John W. Schulz
INCUBATION RHYTHMS AND EGG TEMPERATURES OF AN AMERICAN GREEN-WINGED TEAL AND A RENESTING PINTAIL ▪ Alan D. Afton
TEMPORAL PATTERNS OF SPRING MIGRATION OF YELLOW-HEADED BLACKBIRDS IN NORTH DAKOTA ▪ Richard D. Crawford
CHECKLIST OF NORTH DAKOTA MAMMALS: COMMENTS ON STATUS AND DISTRIBUTION OF SPECIES ▪ Robert W. Seabloom
NOTE
First Nesting Record of Cattle Egret and Little Blue Heron in North Dakota ▪ Lloyd A. Jones
BOOK REVIEWS
Geese of the World ▪ Carl E. …
The Maine Coast : Issues Considered, Maine Coastal Program
The Maine Coast : Issues Considered, Maine Coastal Program
Maine Collection
The Maine Coast : Issues Considered - A Report to the Governor by his Advisory Committee on Coastal Development and Conservation
Maine Coastal Program, Maine State Planning Office
Augusta, Maine (31 October 1978)
Contents: Introduction / Summary of Committee Recommendations / Fisheries / Port Development / Heavy Industry Siting / Travel and Tourism / Cumulative Impact of Development / Natural Resource Information Transfer
Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer
Influence Of Nitrogen Fertilization On The Quality And Quantity Of Streamflow From A Forested Watershed, George B. Coltharp, Michael T. Shearer, Everett P. Springer, Robert F. Wittwer
KWRRI Research Reports
This project was designed to determine the effects of nitrogen fertilization on the quality and quantity of streamflow eminating from an eastern hardwood forest watershed. A 40.67 ha watershed, located in mountainous eastern Kentucky, was aerially fertilized in late April 1975. The forest stand was principally oak, hickory, and yellow poplar, 50 - 55 years of age and in a relatively undisturbed condition. A helicopter applied anunonium nitrate at a rate of 504 kg/ha. Because a large part of applied nitrogen fertilizer ends up in the highly mobile nitrate nitrogen.form, this is the principal ion monitored in this study. No …
State Of The Fisheries Report 1977, Department Of Fisheries And Wildlife, Western Australia
State Of The Fisheries Report 1977, Department Of Fisheries And Wildlife, Western Australia
Status Reports of the Fisheries and Aquatic Resources
The total value of the fisheries of Western Australia is the highest of any of the States, and the Western Australian rock lobster fishery is the most valuable single fishery in Australia.
The Prairie Naturalist Vol. 10, No. 3. September 1978
The Prairie Naturalist Vol. 10, No. 3. September 1978
The Prairie Naturalist
NOTES ON DISTRIBUTION OF THREE SPECIES OF MAMMALS IN SOUTH DAKOTA ▪ J. K. Jones, Jr., J. R. Choate and R. B. Wilhelm
A MID-CONTINENT IRRUPTION OF CANADA LYNX, 1962-63 ▪ H. L. Gunderson
CHECKLIST OF NORTH DAKOTA MAMMALS (REVISED) ▪ J. M. Wiebe and J. F. Cassel
DECLINE OF YEAR-CLASS STRENGTH OF BUFFALO FISHES IN LAKE SAKAKAWEA, NORTH DAKOTA ▪ D. W. Willis and J. B. Owen
NOTE
Pileated Woodpecker Eating Russian Olive Fruits ▪ R. S. McVoy
BOOK REVIEWS
Birds of the Prairie Provinces ▪ W. J. Maher
Wildlife of the Prairies ▪ C. R. Grondahl
Distribution Patterns …
"Toxic Chemicals In The Environment", William E. Cooper
"Toxic Chemicals In The Environment", William E. Cooper
Special Collections: Oregon Public Speakers
Presented and recorded with Arbib, M. A., "Environmental Simulation and Long-Term Planning."
The Prairie Naturalist Vol. 10, No. 2. June 1978
The Prairie Naturalist Vol. 10, No. 2. June 1978
The Prairie Naturalist
ANALYSIS OF THE FLEHMEN DISPLAY IN AMERICAN BISON (BISON BISON) ▪ B. R. Mahan, M. P. Munger and H. L. Gunderson
AVIAN MORTALITY CAUSED BY A SEPTEMBER WIND AND. HAIL STORM ▪ K. F. Higgins and M. A. Johnson
DISTRIBUTION OF TWO SPECIES OF LONG-EARED BATS OF THE GENUS MYOTIS ON THE NORTHERN GREAT PLAINS ▪ J. K. Jones, Jr. and J. R. Choate
ALFALFA AND THE OCCURRENCE OF FISSURES ON THE NORTH DAKOTA PRAIRIES ▪ J. P. Bluemle, A. E Kehew, E. A. Brostuen and K. L. Harris
NOTES
An Observation of Badger Predation on Richardson Ground Squirrels ▪ …