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Articles 19381 - 19410 of 19768
Full-Text Articles in Ecology and Evolutionary Biology
West Midlands Development : Pastures For Sandplain Soils, Department Of Agriculture, Western Australia
West Midlands Development : Pastures For Sandplain Soils, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TRIALS at the Badgingarra Research Station have indicated that many pasture species will grow in the West Midlands area.
Choice of the species most suited to any particular locality will be influenced by soil type, rainfall, grazing characteristics and possible ill-effects on stock.
The following species have been recommended.
Cockroaches And Their Control, Clee Francis Howard Jenkins
Cockroaches And Their Control, Clee Francis Howard Jenkins
Journal of the Department of Agriculture, Western Australia, Series 4
SEVERAL species of cockroaches are general household pests.
In this country some of the native varieties have become semi-domesticated and, in addition, two or three introduced forms are quite common.
The Role Of Adventitious Reinforcement In Operant Discrimination, Alan Kamil, John W. Davenport
The Role Of Adventitious Reinforcement In Operant Discrimination, Alan Kamil, John W. Davenport
Avian Cognition Papers
Rats were trained in 2 SD-SΔ discrimination experiments in which the effects of an SD-postponement contingency during SΔ and temporal regularity of SΔ duration were assessed. Experiment I showed that discrimination is markedly facilitated by the presence of an SD-postponement contingency of either fixed or variable duration. Experiment II showed that variable-duration SΔ periods in a noncontingent schedule can also greatly enhance formation of an operant discrimination. These effects were attributed to differences in the probability of adventitious reinforcement of SΔ behavior by SD events.
Ecological Study Of The Effects Of Strip Mining On The Microbiology Of Streams, Ralph H. Weaver, Harry D. Nash
Ecological Study Of The Effects Of Strip Mining On The Microbiology Of Streams, Ralph H. Weaver, Harry D. Nash
KWRRI Research Reports
The microflora of Cane Branch of Beaver Creek in McCreary County, Kentucky, which drains an area that was strip-mined between 1955 and 1959, was studied and compared with that of Helton Branch which drains a comparable area where there has been no mining. Differences include: the establishment of Ferrcbacillus ferrooxidans, for which procedures were developed for direct colony isolation from the stream; fewer saprophytic bacteria; more numerous and more diversified filamentous and unicellular fungi; and characteristic differences in algal flora. Representatives of 42 genera of filamentous fungi were identified. Of these, 21 were isolated only from Cane Branch. Representatives of …
Prairie Plants And Their Environment, J. E. Weaver
Prairie Plants And Their Environment, J. E. Weaver
Papers of John E. Weaver (1884–1956)
When, in 1916, the writer came to the University of Nebraska as a young instructor, he came with a background that well fitted him for studies in the field. His research in the grassland and adjoining forests of southeastern Washington and adjacent Idaho had been completed and a fine acquaintance had been made with methods of examining the prairie both above and below ground level (Weaver, 1915, 1917). Similar studies in the area between the Missouri River and the Rocky Mountains were now to be made, and these have resulted in many new investigations that are of both scientific and …
The Indian Mynah, John L. Long
The Indian Mynah, John L. Long
Journal of the Department of Agriculture, Western Australia, Series 4
THE Common or Indian Mynah (Acridotheres tristis) inhabits Afghanistan, Baluchistan, southern Russian Turkestan, India, Ceylon and the Andaman Islands.
Evaluation Of The Effects Of Reduced Transpiration Upon Soil Moisture Retention In An Aspen Stand Throughout The Growing Season In Northern Utah, Michael Zan
Aspen Bibliography
No abstract provided.
Soil Moisture Recharge In Stands Of Quaking Aspen And Gambel Oak In Central Utah, James L. Boynton
Soil Moisture Recharge In Stands Of Quaking Aspen And Gambel Oak In Central Utah, James L. Boynton
Aspen Bibliography
No abstract provided.
Some Aspects Of The Age And Growth Of The Longear Sunfish, Lepomis Megalotis, In Arkansas Waters, Edmond J. Bacon Jr., Raj V. Kilambi
Some Aspects Of The Age And Growth Of The Longear Sunfish, Lepomis Megalotis, In Arkansas Waters, Edmond J. Bacon Jr., Raj V. Kilambi
Journal of the Arkansas Academy of Science
No abstract provided.
Grasshoppers And Locusts In Western Australia, Clee Francis Howard Jenkins
Grasshoppers And Locusts In Western Australia, Clee Francis Howard Jenkins
Journal of the Department of Agriculture, Western Australia, Series 4
GRASSHOPPERS and locusts are among the most ancient enemies of the farmer, for they figured prominently in Biblical times, and periodically throughout the ages have devastated crops in all parts of the world.
The Red-Whiskered Bulbul, John L. Long
The Red-Whiskered Bulbul, John L. Long
Journal of the Department of Agriculture, Western Australia, Series 4
Widely distributed in both Africa and Asia, Bulbuls are a largely tropical group of fruit eating birds ranging in size from that of a house sparrow to a blackbird.
Maturity And Spawning Periodicity Of The Gizzard Shad, Dorosoma Cepedianum, (La Sueur), In Beaver Reservoir, Raymond E. Baglin Jr., Raj V. Kilambi
Maturity And Spawning Periodicity Of The Gizzard Shad, Dorosoma Cepedianum, (La Sueur), In Beaver Reservoir, Raymond E. Baglin Jr., Raj V. Kilambi
Journal of the Arkansas Academy of Science
No abstract provided.
Enigma Of Penstemon Tenuis Small (Scrophulariaceae), Aileen L. Mcwilliam
Enigma Of Penstemon Tenuis Small (Scrophulariaceae), Aileen L. Mcwilliam
Journal of the Arkansas Academy of Science
No abstract provided.
Coreopsis Saxicola Alex. Var. Duncanii Sherff (Compositae) In Arkansas, Edwin B. Smith
Coreopsis Saxicola Alex. Var. Duncanii Sherff (Compositae) In Arkansas, Edwin B. Smith
Journal of the Arkansas Academy of Science
No abstract provided.
Report On The Gramineae Of The Arkansas Springfield Plateau, Albert Robinson Jr.
Report On The Gramineae Of The Arkansas Springfield Plateau, Albert Robinson Jr.
Journal of the Arkansas Academy of Science
No abstract provided.
Notes On Spotted Skunks (Genus Spilogale) From Western Mexico, Hugh H. Genoways, J. Knox Jones Jr.
Notes On Spotted Skunks (Genus Spilogale) From Western Mexico, Hugh H. Genoways, J. Knox Jones Jr.
University of Nebraska State Museum: Mammalogy Papers
Specimens of spotted skunks acquired from western Mexico by the Museum of Natural History at the University of Kansas in the past two decades add substantially to the knowledge of the species occurring in that region. Two specimens of the rare Spilogale pygmaea (one from Sinaloa and one from Oaxaca) are reported for the first time. Two subspecies of pygmy spotted skunk are recognized - S. p. pygmaea Thomas with type locality at Rosario, Sinaloa, and S. p. australis Hall with type locality at Acapulco, Guerrero.
The large spotted skunk, Spilogalepusorius, varies clinally in size form north (larger) to …
Studies On The Avifauna Of Burgner Acres, An Upland Stream-Side, Ash-Elm Forest And Its Edge, Kerry Lee Bryan
Studies On The Avifauna Of Burgner Acres, An Upland Stream-Side, Ash-Elm Forest And Its Edge, Kerry Lee Bryan
Masters Theses
No abstract provided.
Studies On The Planktonic Protozoa And Other Microbiota Of A Eutrophic Lake, Neil Howard Chance
Studies On The Planktonic Protozoa And Other Microbiota Of A Eutrophic Lake, Neil Howard Chance
Masters Theses
No abstract provided.
Christmas Greetings 1967, Jane Claire Dirks-Edmunds, Ray Edmunds
Christmas Greetings 1967, Jane Claire Dirks-Edmunds, Ray Edmunds
Jane Claire Dirks-Edmunds Documents
This Christmas letter from Jane Claire Dirks-Edmunds and her husband Ray Edmunds, sent to friends and family in 1967, shares experiences from their frequent travels during that year.
An Ecological Study Of The Algae And Mosses Of Cascade Springs, Wasatch County, Utah, Deanna Lynn Mccoard
An Ecological Study Of The Algae And Mosses Of Cascade Springs, Wasatch County, Utah, Deanna Lynn Mccoard
Theses and Dissertations
An ecological study was conducted at Cascade Springs, Wasatch county, Utah from August 1965, to June 1967. The algae and aquatic moss species were determined and ecological information about these organisms was obtained. Physical data were also collected: bicarbonates, carbonates, free carbon dioxide, hydroxides, oxygen, pH, and temperature. The physical environment of the water was found to be very constant. Tests taken at the different study sites were consistently similar, not only during each day, but all year around. No great variation of any kind was found in the water. In contrast to the water environment, the topography of the …
A Balanced Salt Culture Medium For Halteria Grandinella, Yee Wan Mark
A Balanced Salt Culture Medium For Halteria Grandinella, Yee Wan Mark
All-Inclusive List of Electronic Theses and Dissertations
The animals that the writer worked with liere the unicellular organisms called liaJ,tez:ia grandil.!iilJ.a• They belong to the Pl~lum Protozoa and are placed in the Class Ciliata and the Order Oligotrichia. llftltez'A gDJ}gini•U, like most protozoa, ll ve in waters but they seem to prefer qUiet pools, lakes, and ponds in which aqua i;;!c plants are growing and in which there is much organic matter.
Ecological Studies Of Native Green River Fishes Below Flaming Gorge Dam, 1964-1966, Charles David Vanicek
Ecological Studies Of Native Green River Fishes Below Flaming Gorge Dam, 1964-1966, Charles David Vanicek
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Investigations to study (1) the species composition and distribution of Green River fishes between Flaming Gorge Dam and Ouray, Utah and (2) the ecology and life history of selected native species (Colorado squafish, Ptychocheilus lucius; Colorad chub, Gila robusta; bluehead sucker, Pantosteus delphinus; and humpback sucker, Xyrauchen texanus) in Dinosaur National Monument were conducted from May, 1964, to October, 1966. A total of 23,735 fish consisting of 9 indigenous and 11 exotic species, were taken in 639 collections by electrofishing gear, gill nets, seines, and fry gear. Flaming Gorge Dam has caused a major change in …
The Distribution Of Three Taxa Of Peromyscus In Central Washington, Gay Harold Engelsen
The Distribution Of Three Taxa Of Peromyscus In Central Washington, Gay Harold Engelsen
All Master's Theses
One aspect of the study was to define the present ranges of all types of Peromyscus in the study area; the other to determine the extent of interfertility of the groups.
A Revision Of The Bees Of The Genus Andrena Of The Western Hemisphere. Part I. Callandrena. (Hymenoptera: Andrenidae), Wallace E. Laberge
A Revision Of The Bees Of The Genus Andrena Of The Western Hemisphere. Part I. Callandrena. (Hymenoptera: Andrenidae), Wallace E. Laberge
Bulletin of the University of Nebraska State Museum (1924–2023)
This paper is the first part of a monograph of the bee genus Andrena in the western hemisphere and treats the subgenus Callandrena. Available data regarding phylogeny, distribution, biology, and flower preferences are presented together with keys to separate the species, diagnoses and descriptions of the species and discussions of geographic variation when applicable. Seventy-nine species and one subspecies are recognized. Sixteen names are relegated to synonymy, one to homonymy and eight are removed from the subgenus Callandrena. The thirty-nine species new to science are: aerifera, aeripes, afimbriata, ardis, auripes, balsamorhizae, beameri, bilimeki, bullata, calvata, dreisbachorum, fulminea, fulminoides, …
Control Of Weeds In Garden Areas, Geoffrey A. Pearce
Control Of Weeds In Garden Areas, Geoffrey A. Pearce
Journal of the Department of Agriculture, Western Australia, Series 4
THE present-day gardener does not appear to relish the tedious job of removing weeds by hand. It is a never-ending task and no sooner is one germination controlled than another appears.
Modern herbicides provide a ready answer for overcoming the weed problem in the home garden, but it is essential to select the correct chemical and to understand its limitations.
The Indian Crow, John L. Long
The Indian Crow, John L. Long
Journal of the Department of Agriculture, Western Australia, Series 4
THE Indian crow occasionally reaches the shores of Australia from southern Asia via ships travelling between Indian and Australian ports.
What Are Vermin?, A R. Tomlinson
What Are Vermin?, A R. Tomlinson
Journal of the Department of Agriculture, Western Australia, Series 4
ACCORDING to one dictionary the term 'vermin'includes "mammals and birds injurious to game or crops", "rats and mice", "noxious insects", "parasitic worms" and even "vile persons."
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
NINTH RANDOM SAMPLE LAYING TEST, 1965-66
POULTRY RESEARCH STATION, WEMBLEY
FINAL REPORT TO 500 DAYS
Tenth Random Sample Laying Test, 1966-67 : Cages, Department Of Agriculture, Western Australia
Tenth Random Sample Laying Test, 1966-67 : Cages, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TENTH RANDOM SAMPLE LAYING TEST, 1966-67 - CAGES
POULTRY RESEARCH STATION, WEMBLEY
SECOND PROGRESSIVE REPORT TO 26th FEBRUARY, 1967
Average age of birds 215.5 days or 30 weeks and 6 days.
Special Field Days For Merino Breeders, Department Of Agriculture, Western Australia
Special Field Days For Merino Breeders, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
More than 200 Merino stud breeders attended special stud breeding and fertility field days arranged for them by the Department of Agriculture recently.
Breeders attending represented some 40 per cent of the State's Merino studs.