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Articles 1 - 30 of 663
Full-Text Articles in Life Sciences
Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 1988, Agricultural Experiment Station, Plant Science Department
Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 1988, Agricultural Experiment Station, Plant Science Department
Agricultural Experiment Station and Research Farm Annual Reports
This is the 1988 progress report for the Central Crops and Soils Research Station at Highmore, South Dakota State College. This document represents the research conducted at the Station during the 1988 crop season including: weather data, grass breeding and production, alfalfa experiment and testing, the influence of fertilizer phosphorus on crested wheatgrass, wheat breeding, corn breeding, soybean research, herbicide research and demonstrations, and information on the Station drip irrigation project.
Estimation Of Genetic Parameters For Production And Reproduction In Finnish Ayrshire Cattle, E. Mantysaari, L. Dale Van Vleck
Estimation Of Genetic Parameters For Production And Reproduction In Finnish Ayrshire Cattle, E. Mantysaari, L. Dale Van Vleck
Department of Animal Science: Faculty Publications
Records of AI-sired cows born between 1978 and 1982 were used to form two composite production and reproduction data sets. First (second) consisted of 35,568 (26,443) first lactations of daughters of 270 (237) sires. Traits were FCM, heifer, and first parity nonreturn rates, days between calving and first insemination, and days open, with means 5075 (5280) kg, .62 (.62), .44 (.49), 81 (81) d and 110 (111) d. (Co)variance components were estimated by REML with an expectation maximization algorithm. Sire model included age, month, herd-year effects, and relationships among sires. Records on animals with observations missing on some traits were …
Prediction Of Progeny Genetic Evaluations From Simultaneous Genetic Evaluations Of The Dam, Sire, And Maternal Grandsire With An Animal Model, L. Dale Van Vleck, C. P. Van Tassell, R. A. Westell
Prediction Of Progeny Genetic Evaluations From Simultaneous Genetic Evaluations Of The Dam, Sire, And Maternal Grandsire With An Animal Model, L. Dale Van Vleck, C. P. Van Tassell, R. A. Westell
Department of Animal Science: Faculty Publications
Simultaneous genetic evaluations for bulls and cows obtained by mixed model procedures with an animal model incorporating all numerator relationships for artificially sired Holstein cows in northeastern United States were compared with separate (Northeast) mixed model evaluations of cows and sires for predicting genetic evaluations of progeny from dam, sire, and maternal grandsire evaluations. Regression coefficients for progeny (322,104 daughters and 837 sons) evaluations on dam, sire, and maternal grandsire evaluations were for daughters: Northeast evaluations; .50, .37, and -.02 compared to theoretical coefficients of .74, .52, and -.13, and simultaneous evaluations; .61, .50, and -.09 compared to theoretical coefficients …
Northeast Research Station Watertown, South Dakota Annual Progress Report, 1988, Agricultural Experiment Station, Plant Science Department
Northeast Research Station Watertown, South Dakota Annual Progress Report, 1988, Agricultural Experiment Station, Plant Science Department
Agricultural Experiment Station and Research Farm Annual Reports
This is the 1988 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes information on the 1988 crop season, including precipitation data, grain and wheat research and disease control, alfalfa cultivar test, orchardgrass test, potato fungicide test, crop performance test, corn breeding, sunflower yields, weed control demonstrations, farming system studies, and an economic analysis of farming systems.
Nonfish Prey Of Wintering Bald Eagles In Lilinois, Given Harper, D. Hopkins, Thomas Dunston
Nonfish Prey Of Wintering Bald Eagles In Lilinois, Given Harper, D. Hopkins, Thomas Dunston
Scholarship
Many Bald Eagles (Haliaeetus leucocephalus) winter in Illinois (Fawks 1979), where they feed primarily on fish (e.g., Southern 1966, Fischer 1982, Harper 1983). However, few reports have been published documenting their use of mammalian and avian prey in the midwestern United States (Lingle and Krapu 1986, Stalmaster 1987). This paper describes the almost exclusive use of nonfish prey in an upland population of Bald Eagles, and discusses related management implications.
Capital Requirements And Income Opportunities Associated With Alternative Systems Of Farrow-To-Finish Swine Production On West Tennessee Farms, University Of Tennessee Agricultural Experiment Station, William D. Mcbride, S. Darrell Mundy, Robert M. Ray
Capital Requirements And Income Opportunities Associated With Alternative Systems Of Farrow-To-Finish Swine Production On West Tennessee Farms, University Of Tennessee Agricultural Experiment Station, William D. Mcbride, S. Darrell Mundy, Robert M. Ray
Bulletins
No abstract provided.
West River Agricultural Research And Extension Center Progress Report, 1988, Agricultural Experiment Station
West River Agricultural Research And Extension Center Progress Report, 1988, Agricultural Experiment Station
Agricultural Experiment Station and Research Farm Annual Reports
This is the 1988 annual progress report of the West River Crops Soils Research and Extension Center, South Dakota Agricultural Experiment Station. This report includes: a weather summary for all west river counties involved in research, small grain variety trials and demonstrations, feed grain variety testing, management, tillage and cultural practices, and weed control research projects.
Coccidia (Apicomplexa: Eimeriidae) From The Subterranean Rodent Ctenomys Opimus Wagner (Ctenomyidae) From Bolivia, South America, Christine R. Lambert, Scott Lyell Gardner, Donald Duszynski
Coccidia (Apicomplexa: Eimeriidae) From The Subterranean Rodent Ctenomys Opimus Wagner (Ctenomyidae) From Bolivia, South America, Christine R. Lambert, Scott Lyell Gardner, Donald Duszynski
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Of 35 tuco-tucos (Ctenomys opimus) collected in Bolivia, South America, 31 (88%) had eimerian oocysts in their feces at the time they were examined. Eighteen (58%) of the 31 infected animals were concurrently infected with 2 or 3 eimerian species. Four species of Eimeria were recovered and are described as new species based on the characteristics of sporulated oocysts. Oocysts of Eimeria granifera n. sp. were ellipsoidal, 21.1 x 17.2 (15-26 x 11-20), [micro]m with sporocysts ovoidal, 11.3 x 7.1 (8-14 x 5-9), [micro]m. Oocysts of Eimeria montuosi n. sp. were spheroidal, 24.2 x 22.0 (21-28 x 18-25) …
Survival Of Trout Strains As Affected By Limnological Parameters, Wayne A. Wurtsbaugh
Survival Of Trout Strains As Affected By Limnological Parameters, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
Prior work at East Canyon Reservoir, Utah indicated that adult trout are important predators of stocked juvenile rainbow trout. Brown trout, in particular, were exclusively piscivorous when th~y exceeded 185 mm standard length. Fish became increasingly important in the diet of cutthroat trout greater than 330 mm. The purpose of this study was to further document the effect of adult trout on survival of juvenile rainbow trout in mid-elevation reservoirs. Causey Reservoir was chosen because it was thought to contain large brown and cutthroat trout and had not been intensively studied during the last eight years.
Southeast South Dakota Experiment Farm Annual Progress Report, 1988, Agricultural Experiment Station
Southeast South Dakota Experiment Farm Annual Progress Report, 1988, Agricultural Experiment Station
Agricultural Experiment Station and Research Farm Annual Reports
This twenty-eighth annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation data, corn production and performance, soybean research and planting, soil testing, alfalfa yield test, fertilizer testing, herbicide research, crop rotation, sorghum, small grains, livestock research, and pest and weed control.
1988 Fall Field Day
Nebraska Bird Review
There were 65 people who attended part or all of the 1988 Fall Meeting at Halsey Forest 8-9 October. This included Dr. Jan Skoudin, of Prague, Czechoslovakia. Saturday night Dr. Julie Ann Savidge spoke on “The Extinction of an Island Forest Avifauna by an Introduced Snake”, a summary of her investigation of the brown tree snake’s effect on Guam’s avifauna. There was also a short slide show. The rest of the time was available for birding. A few NOU members came early enough on Friday to work with members of the US Forest Service on a butterfly and hummingbird garden …
"Index To Volume 56," From Nebraska Bird Review (December 1988) 56(4).
"Index To Volume 56," From Nebraska Bird Review (December 1988) 56(4).
Nebraska Bird Review
Index to Volume 56
9 pages
"Notes," From Nebraska Bird Review (December 1988) 56(4)
"Notes," From Nebraska Bird Review (December 1988) 56(4)
Nebraska Bird Review
ADDITIONAL REPORTS FROM THOMAS COUNTY, SPRING 1988. Mike Dwyer, then working on a grouse telemetry project at Halsey Forest for the Game and Parks Commission, reported a Northern Saw-whet Owl 10 May. Mr. Dwyer's comments were: Most likely territorial male. Constant repetitions whistle. First vocalizations heard at 2345 h. in mixed hardwood/conifers. On 13 June he reported a Chuck-will's-widow, with these remarks: Was close enough to detect the "chuck" syllable of the call. Calling occurred at dusk in mixed hardwoods/conifers.
The Official List Of The Birds Of Nebraska
The Official List Of The Birds Of Nebraska
Nebraska Bird Review
The following is a list of species of birds whose occurrence in Nebraska has been proven to the satisfaction of the Nebraska Ornithologists' Union Records Committee. It includes records considered through 31 Dec. 1987. The sequence and nomenclature follow that used in the A.O.U. Checklist of North American Birds, 6th ed., 1983, and its supplements through the 36th.
The list includes 406 species; several other species are currently under review. The list also indicates how frequently each species has been acceptably reported in the past decade (1977-1987) to give some idea of current status. Frequency of occurrence is indicated …
Nebraska Bird Review (December 1988) 56(4), Whole Issue
Nebraska Bird Review (December 1988) 56(4), Whole Issue
Nebraska Bird Review
Table of Contents
The Official List of the Birds of Nebraska.................86
1988 Fall Field Day.................97
Book Reviews.................97
Notes.................99
Index to Volume 56 .................100
Survival Of Escherichia-Coli And Salmonella Spp In Estuarine Environments, Mw Rhodes, Hi Kator
Survival Of Escherichia-Coli And Salmonella Spp In Estuarine Environments, Mw Rhodes, Hi Kator
VIMS Articles
Survival of Escherichia coli and Salmonella spp. in estuarine waters was compared over a variety of seasonal temperatures during in situ exposure in diffusion chambers. Sublethal stress was measured by both selective-versus-resuscitative enumeration procedures and an electrochemical detection method. E. coli and Salmonella spp. test suspensions, prepared to minimize sublethal injury, were exposed in a shallow tidal creek and at a site 7.1 km further downriver. Bacterial die-off and sublethal stress in filtered estuarine water were inversely related to water temperature. Salmonella spp. populations exhibited significantly less die-off and stress than did E. coli at water temperatures of <10°C. Although the most pronounced reductions (ca. 3 log units) in test bacteria occurred during seasonally warm temperatures in the presence of the autochthonous microbiota, 102 to 104 test cells per ml remained after 2 weeks of exposure to temperatures of >15°C. Reductions …10°c.>
Ard News December 1988
Agricultural Research Division: News and Annual Reports
CONTENTS:
ARD ADVISORY COUNCIL NOTES
SEASONS GREETINGS
GRADUATE STUDENT ENROLLMENT IN IANR PROGRAMS - FALL 1988
RESEARCH GRANTS AND CONTRACTS RECEIVED SEPTEMBER & OCTOBER, 1988
USDA TO SUPPORT NATIONAL NEEDS GRADUATE FELLOWSHIPS
FOOD PROCESSING CENTER DAY
PRIORITY RESEARCH INITIATIVES 1988-89
COOPERATIVE STATES RESEARCH SERVICE FUNDING
RESEARCH COUNCIL BUDGETS FOR 1988-89
GRANTS AWARDED FOR THE PERIOD OF JULY 1987• JUNE 1988
NEW AND REVISED PROJECTS
NEW AND REVISED HATCH AND STATE PROJECTS
"Book Reviews," From Nebraska Bird Review (December 1988) 56(4).
"Book Reviews," From Nebraska Bird Review (December 1988) 56(4).
Nebraska Bird Review
The Collins Guide to the Birds of Britian and Europe, with North Africa and the Middle East, Hermann Heinzel, Richard Fitter, and John Parslow, 326 pp., 4 1/2 x 7 1/2, index. The Stephen Greene Press, Lexing ton, Mass., softbound $15.95.
The Collins Field Guide to the Birds of West Africa, William Serle and Gerard J. Morel, 352 pp., 5 x 8, index. The Stephen Greene Press, Lexington, Mass., hardbound $21.95.
Announcement About The 20th International Ornithological Congress In Nebraska Bird Review (December 1988) 56(4)
Nebraska Bird Review
THE 20TH INTERNATIONAL ORNITHOLOGICAL CONGRESS will take place in Christchurch, New Zealand, on 2-9 December 1990. The Congress programme will include 7 plenary lectures, 48 symposia, contributed papers (spoken and poster), workshops, round-table discussions and films. There will be a mid-Congress excursion, day. Longer tours are planned to interesting ornithological sites in New Zealand before anc.' after the Congress, including the post Congress cruises to sub-antarctic islands.
The Prairie Naturalist Volume 20, No. 4. December 1988
The Prairie Naturalist Volume 20, No. 4. December 1988
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
RANGE PLANT COMMUNITIES OF THE CENTRAL GRASSLAND RESEARCH STATION IN SOUTH CENTRAL NORTH DAKOTA ▪ C. L Lura, W. T. Barker, and P. E. Nyren
SEASONAL PATTERNS IN SAMPLING DATA FOR LARGEMOUTH BASS AND BLUE GILLS IN A NORTHERN GREAT PLAINS IMPOUNDMENT ▪ E. A. Bettross and D. W. Willis
INTRODUCTION, ESTABLISHMENT, AND DISPERSAL OF WESTERN MOSQUITOFISH IN NEBRASKA (ACTINOPTERYGII: POECILIIDAE) ▪ J. D. Lynch
OBSERVATIONS ON THE ECOLOGY OF CHIGGERS (ACARI: TROMBICULIDAE) FROM SOUTH DAKOTA ▪ E. R. Easton and W. …
Effect Of Conidia Germination On Infection Of Brown Planthopper (Bph) By Insect Fungi, M. C. Rombach, R. M. Aguda, Donald W. Roberts
Effect Of Conidia Germination On Infection Of Brown Planthopper (Bph) By Insect Fungi, M. C. Rombach, R. M. Aguda, Donald W. Roberts
Biology Faculty Publications
Conidia of insect fungi actively invade BPH [brown planthopper]. After a conidium lands on the insect cuticle, germination takes about 8 to 16 h, depending on the temperature and relative humidity. After the germination, tuber is formed, the conidium produces specific chitinase enzymes to dissolve the insect cuticle. This allows the fungus to enter the insect body cavity, where further fungus growth occurs. At the end of the infection cycle, the mycelium sporulates on the outside of the insect. Conidia produced on the cadaver can infect healthy BPH initiating epizootics of the fungus. To test infection, 50 adult alate BPH …
Discocilia And Paddle Cilia In The Larvae Of Mulinia Lateralis And Spisula Solidissima (Mollusca: Bivalvia), Bernardita Campos, Roger L. Mann
Discocilia And Paddle Cilia In The Larvae Of Mulinia Lateralis And Spisula Solidissima (Mollusca: Bivalvia), Bernardita Campos, Roger L. Mann
VIMS Articles
The bivalve larval velum contains four bands of cilia: inner and outer preoral bands, an adoral band, and a postoral band. The preoral bands of compound cilia are generally considered to be used for both locomotion and food gathering. The adoral and postoral bands function in concert with the preoral bands in food gathering and transfer of food to the mouth. Cilia are usually described as cylindrical structures which taper to a blunt tip. Modified cilia with disc-shaped (discocilia) or pad dle-shaped ends have been recorded in several invertebrate species. Here, for the first time, we demonstrate the presence of …
Performance & Carcass Traits Of Swine Of Four Different Phenotypes & Three Usda Grades, Jon Althaus
Performance & Carcass Traits Of Swine Of Four Different Phenotypes & Three Usda Grades, Jon Althaus
Masters Theses & Specialist Projects
The purpose of this study was to compare the performance and carcass characteristics of swine of four different phenotypes and three USDA grades.
Hogs were placed into phenotypic groups of 24 each and penned by group. These pens were ideal, cutability, light muscled, fat, VS US and US The hops were fed a 16% corn and soybean meal ration fortified with appropriate minerals and vitamins. They were housed in a total confinement curtain-sided Kentucky plan building with a partially slatted floor. The hogs were weighed at 6-week intervals throughout the project to monitor average daily gain and pen feed efficiency. …
The Formation And Function Of Dnase I Hypersensitive Sites In The Process Of Gene Activation, Sarah C.R. Elgin
The Formation And Function Of Dnase I Hypersensitive Sites In The Process Of Gene Activation, Sarah C.R. Elgin
Biology Faculty Publications & Presentations
No abstract provided.
Oyster Spatfall In Virginia Rivers: 1988 Annual Summary, Bruce Barber, James Whitcomb
Oyster Spatfall In Virginia Rivers: 1988 Annual Summary, Bruce Barber, James Whitcomb
Reports
The Virginia Institute of Marine Science (VIMS) conducts annual surveys of oyster spatfall ( or "sett.ing") in Virginia waters. This survey provides an estimate of the potential of a particular area for receiving a "striken or set of oysters and helps define the timiug of setting events. In 1988 spatfall was monitored from June 6 to October 16 at a total of forty-two stations (Figure 1). · During this period shellstrings were deployed at each station (0.5m off the bottom) on a weekly basis. A shellstring consists of 12 oyster shells drilled through the center and strung on a piece …
A Documentation Of Virginia Trawl Surverys, 1955-1984, Listing Pertinent Variables: Date, Station Location, Gear, Vessel, Tow Direction, And Type Of Survey Volume Iii: James River- Including Burwell Bay And Three Oxbows, Frank J. Wojcik, Willard A. Van Engel
A Documentation Of Virginia Trawl Surverys, 1955-1984, Listing Pertinent Variables: Date, Station Location, Gear, Vessel, Tow Direction, And Type Of Survey Volume Iii: James River- Including Burwell Bay And Three Oxbows, Frank J. Wojcik, Willard A. Van Engel
Reports
No abstract provided.
A Documentation Of Virginia Trawl Surverys, 1955-1984, Listing Pertinent Variables: Date, Station Location, Gear, Vessel, Tow Direction, And Type Of Survey Volume V: Potomac River, Frank J. Wojcik, Willard A. Van Engel
A Documentation Of Virginia Trawl Surverys, 1955-1984, Listing Pertinent Variables: Date, Station Location, Gear, Vessel, Tow Direction, And Type Of Survey Volume V: Potomac River, Frank J. Wojcik, Willard A. Van Engel
Reports
No abstract provided.
A Study Of The Advantages And Disadvantages Of Virginia Assuming 404 Regulatory Authority Under The Federal Clean Water Act, N. Bartlett Theberge
A Study Of The Advantages And Disadvantages Of Virginia Assuming 404 Regulatory Authority Under The Federal Clean Water Act, N. Bartlett Theberge
Reports
No abstract provided.
The Short Term Effects Of Manganese Toxicity On Isocitrate Dehydrogenase In Wheat & Tobacco, Juergen Pfeiffer
The Short Term Effects Of Manganese Toxicity On Isocitrate Dehydrogenase In Wheat & Tobacco, Juergen Pfeiffer
Masters Theses & Specialist Projects
The short term effects of high manganese levels (80 mg/L) on wheat and tobacco isocitrate dehydrogenase (IDH) activity were compared. The change in activity was then compared to the concentrations of manganese in the tissues.
As the time of manganese exposure increased, the fresh weight IDH activities in wheat and tobacco decreased. In contrast both control groups had similar enzyme activities every 6 hr over the 24 hr test period. The decrease in IDH activity of wheat and tobacco plants in experimental groups seemed to be related to an increase of the manganese in the leaf tissue. The slower decrease …
Isolation & Characterization Of Dna Polymerase Alpha And Gamma From Turnips (Brassica Rapa) And Etiolated Soybeans (Glycine Max), Donna Hill
Masters Theses & Specialist Projects
DNA polymerase alpha, the enzyme involved in nuclear DMA replication, and DNA polymerase gamma, the enzyme involved in organellular DNA replication, were isolated and purified from soybean and turnip. The enzymes were characterized following ammonium sulfate precipitation, DEAF-cellulcse, phosphocelluloca, and hydroxylapatite chromatography, and by non-denaturing polyacrylamide gel electrophoresis. Protein banct were electropluted and the enzymes characterized using kinetic studies and sensitivity to divalent cations and inhibitors. Molecular weight and subunit composition studies indicated a molecular weight for the catalytic subunit of DNA polymerase alpha in soybean and turnip to be 46kDa. DNA polymeraqe gamma was composed of a catalytic subunit …