Digital Commons Network^™

Zooplankton Of The St. Johns River Estuary, Frederick C. Tone

Retrospective Theses and Dissertations

Zooplankton populations in the St. Johns River Estuary ranged from 3,000/m3 to 20,000/m3 during monthly collections from September, 1973 to August, 1974. Acartia tonsa Dana was the dominant organism throughout the year, except for spring blooms of Balanus sp. nauplii in the lower estuary and summer occurrences of Eubosmin tubins in the upper estuary. With these two exceptions, species composition, and community structure were similar throughout the estuary, year round. A patchy distribution of the zooplankton caused high replicate sample variation which made it difficult to detect small population variations. Salinity appeared to have the greatest effect on the distribution …

Maturation And Fecundity Of Redear Sunfish, James C. Adams, Raj V. Kilambi

Journal of the Arkansas Academy of Science

Based on gonosomatic indices and ovum diameter frequency distributions, the redear sunfish spawns from May through July. Fast growing 2-year-old (above 150 mm) and older fish attain sexual maturity. Mature ovum diameter ranged from 0.60 to 1.30 mm. Fecundity • total length, • total weight, and • age relationships were: 1nF = 5.95242 + 0.01967L (r²= 0.90), LnF = 8.80328 + 0.00594W (r²= 0.92), and 1nF = 8.19332 + 0.50231 A (r² =0.83), respectively.

Lichens Of Arkansas I: A Summary Of Current Information, Jewel E. Moore

Journal of the Arkansas Academy of Science

No abstract provided.

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.

Pulling The Wool Off, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

The Department of Agriculture has begun a three year project to study the potential for "chemical shearing" or, more correctly, biological defleecing.

How To Select A Tractor, W T. Brown

Journal of the Department of Agriculture, Western Australia, Series 4

A look at some of the factors to be considered when choosing a tractor for your farm. There is no one answer

Saint Thomas Aquinas' Division Of The Sciences, Marvin E. Kanne

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Saint Thomas Aquinas holds that scientific knowledge is attained when observable phenomena and their properties are accounted for in terms of their relations to their causes. On establishing the divisions of the sciences, Aquinas follows the threefold division of the speculative sciences as proposed by Aristotle and handed on to the Middle Ages by Boethius: natural philosophy, mathematics, and theology. Each science is defined by its subject matter and by its method of procedure.

While Aquinas followed the teachings of Boethius on this point, he makes significant additions and alterations. Thus in his analysis Aquinas focuses his attention on the …

The Realizing Character Of The Social Sciences, Andrew Larkin

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Because of successful construction of theories in the mathematical, physical, and biological sciences, and because of their unchallenged technological usefulness, the philosophy of science has concentrated on the formal and epistemological aspects of sciences. However, the less formal social sciences have had a greater impact on society. This realizing character of the sciences, i.e., their influence on society through policy (in the case of the social sciences), has been inadequately studied. In this paper the normative character of the social sciences is seen from the perspective of realization. Norms as internal and external criteria, which are entailed by realization, are …

A Calculus Of Natural Deductions For The Full First-Order Predicate Logic With Identity, Hubert H. Schneider

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Natural deductions form an important tool in applications of logic to scientific theories. Our calculus for natural deductions is formulated in such a manner that it can be applied to the language of the full first-order predicate logic. Among its features are a certain symmetry of its deduction rules and simplified restrictions governing finished deductions. The adequacy of our natural deduction system is established by means of showing its equivalence with a more standard type of deduction system, known to be sound and complete. The proof for the equivalence of the two systems is constructive so that any deduction in …

Transactions Of The Nebraska Academy Of Sciences Volume Vii (1979): Table Of Contents

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Nebraska Academy of Sciences, Officers, Policy Committee ......... ii

Editorial Board, Instructions to Contributors ......... vi

Symposium "Water Usage: Who Cares?"

Water usage-who cares?: a planner's viewpoint (G. J. Karabatsos) ......... 1

Water usage-who cares?: an environmental viewpoint (H. G. Nagel) ......... 5

Water usage-who cares?: an historical perspective (D. T. Pederson) ......... 9

Instream flow needs for water quality management (R. D. Todd) ......... 11

Water usage and power production: the electric utility industry is dependent on water utilization (T. P. Harding and L. G. Harrow) ......... 15

Other Water-Related Subjects

Hydrogeologic relationships to structural failure, Chadron State College, …

Residential Water Demand Of Small Communities In New York State: A Note, Raymond Hubbard, Andrew Huggins

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

A number of studies have indicated that the demand for water is price elastic. This being the case, it has been argued that appropriate pricing policies would provide a means for conserving this valuable resource. The present study, however, reveals that the residential water demand of small communities in New York State is neither price nor income elastic and that conservation measures should focus upon alternative procedures. Circumstances in Nebraska, however, are likely to be considerably at variance with those typical of New York, and it is suggested that a similar study carried out in Nebraska could be beneficial.

Contributions Of Pierre Paul Broca To Cancer Genetics, Anne J. Krush

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Pierre P. Broca was born in a small town near Bordeaux, France, June 28, 1824, the son of a Huguenot physician. After graduation from a local college, he entered medical school at the University of Paris at the age of 17, was graduated in three years. Five years later he received the M.D. degree, having special interests in pathology, anatomy, and surgery. In 1853 he was appointed assistant professor at the Faculty of Medicine and surgeon of the "Central Bureau." Broca made significant scientific and clinical contributions in all of the above fields as well as in anthropology. He founded …

A. Minimum Tillage Investigations. B. Evaluation Of Stubble Management Techniques, D Jasper

Experimental Summaries - Plant Research

77WH17 Continuous cropping site, Wongan Hills Research Station 77WH18 Rotational site, Wongan Hills Research Station 77M13 Heavy land continuous cropping site, Merredin Research Station 78M25 Light land continuous cropping site, Merredin Research Station 77M56 Rotational site, Merredin Research Station 77A16 Continuous cropping site, Avondale Research Station 77A43 Rotational site, Avondale Research Station 77E52 Rotational site, Esperance Downs Research Station 78BA42 Continuous Cropping Site, Badgingarra Research Station 77MT15 Continuous Cropping Site, Mt Barker Research Station 79WH6, Evaluation of stubble management practices, Wongan Hills Research Station 79M6 Heavy Land, Merredin Research Station 79M7 Light land, Merredin Research Station

Barley Yellow Dwarf Virus In Barley And Oats (79mt20, 79pe13) Experimental Summary 1979, G D. Mclean, T N. Khan, M Grimm, J D. Sandow

Experimental Summaries - Plant Research

(1) Yield assessments have continued similar to those used in 1977 and 1978. Essentially, plants with symptoms typical of BYDV are marked in the early spring as well as a similar number without symptoms. Yield differences were obtained both for Clipper Barley and an oats variety. (2) Two pilot experiments using viruliferous aphids were carried out at Mount Barker (79MT20) and at South Perth · (79PE13). Both Rhopalosiphum padi and R. maidis were used. Infection at Mt Barker failed, and therefore no data is presented. The Perth experiment was planted on August 31, 1979. The original plan was to have …

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

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.

Summary Research Results 1979, G A. Pearce

Experimental Summaries - Plant Research

DPX4189 for weed control in wheat 79N27. Location - Toodyay. Herbicide mixtures for broadleaved weeds in wheat. Location - Toodyay. Diuron mixtures for broad leaf weeds in cereals. Location - "Glencoe" C/- P.O. Bindoon. Herbicides for early planting 79MO42. Location – N. Tonkin – Coomberdale. Broad leaf weeds in cereals 79MO45. Location - Miling (J. Lewis, Plympton). Herbicides for early planting 79LG27. Location – Karlgarin.

Long Term Rotation Trials, I Rowland

Experimental Summaries - Plant Research

Locality: 66M29, 67Cl3, 67N4, 68E5, 68SG5, 73SG16. Soil type, history, rainfall and wheat/lupin yields.

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.

Experimental Summary 1979, J R. Peirce

Experimental Summaries - Plant Research

Contents 79ME28 Soursob (Oxalis caprae) control along Roadsides. 79NO30 A & B.

79NO29 Pre and post emergent applications of Diuron for soursob control in cereals.

79ME31 Post emergent control of soursob in cereals. 79NO39

79ME26 A & B Control of Matricaria (Pentzia sp.) in cereals.

79NO40 Dormancy of Cape Tulip (homeria sp.).

79NO38 Patersons curse (Echium plantagineum) Control in pastures. Afghan thistle (solanum hoplopetalum) Control in pastures. 79ME28 and 79N030 A & B Soursob Control Along Roadsides. Chemicals: Roundup 1, 2 and 3 1ha-1, Diuron 1, 2 and 3 1ha-1, Sencor TD 1, 2 and 3 kgha -1 ) applied …

Investigations Of Ryegrass Toxicity, B A. Stynes

Experimental Summaries - Plant Research

Development of toxicity in the field. Experiment – 79KA13. Location – C. Butterworth, Katanning. The effect of herbicides and growth regulants on gall development. Experiment – 79KA14. Location - C. Butterworth, Katanning. Effect of burning on the production of galls. Experiment – 79KA9. Location - L. Blight, Gnowangerup; K. Butterworth, Katanning; C. Hanna, Katanning; J. Shepherdson, Gnowangerup. Table 1 Previous land use and characteristics of fires at four farms where fields were burnt in autumn to reduce the level of toxicity of ryegrass in the subsequent spring pasture. Table 2 The numbers and relative proportions of galls retained in the …

Leaching Of An Acetanilide Herbicide, Cp55097 In Soil Columns, Regina K. Higgins

Masters Theses

The leachability of the acetanilide herbicide, CP55097 was determined using a soil column system. This herbicide, which is used as a preemergent against certain grasses and broadleaf weeds, was leached through four different soils (sandy clay, sandy loam, sandy clay loam and clay loam) using the following procedure. Plastic columns consisting of 8 rings (2 in. dia. x 1 in.) were assembled and their bottoms covered with cheesecloth. They were then filled with soil and prewetted with water to attain field capacity. Herbicide concentrations equalling 0, 1, 3, 6 lb/A were pipetted onto the soil surface and 0, 1, 2, …

Animal-Sediment Relationship Study Of The Western Branch Of The Lynnhaven River, Charles Perry Seymour

Biological Sciences Theses & Dissertations

The animal-sediment relationships of the marine benthic infauna of an estuarine river system, Lynnhaven River, Virginia Beach, Virginia, were studied at six sites, sampled bimonthly for one year. Six species were found to dominate all of the sampling periods and sites for the year. The greatest number of individuals, biomass, and species were found at the sand sites. Deposit feeders were recorded in greater number than suspension feeders at both the sand and the mud sites.

Cluster and nodal analyses were successful in demonstrating animal-sediment relationships for the intertidal regions of the river system.

Larval Trematode Populations And Host-Parasite Interactions In Cerithidea Californica, John M. Emery

University of the Pacific Theses and Dissertations

Cerithidea california is examined to determine the fecundity of the parasitic trematode species in its gonad. Five species of trematodes are studied (Cloacitrema michiganensis, Euhaplorchis californiensis, Parorchis acanthus, Himasthia rhigedana, and Acanthoraryphium sp.). Their fecundity is determined by direct counts of rediae and estimation of the cercarial population. Correlations are shown for trematode numbers and snail size.

Incidences of infection are given with regard to site, snail size, and trematode species. Comparison is made between infection ratios of C. californica and another marsh snail, Batillaria zonalis.

The Effect Of Body Size And Algal Suspension Density On Filtration Rate And Assimilation Efficiency Of Three Marine Mussels, Mytilus Californianus, Mytilus Edulis And Perna Canaliculus With Consideration Of The Growth Of Each Species, Thomas B. Mccormick Iii

University of the Pacific Theses and Dissertations

Rates of uptake of organic and inorganic suspended particulate material by suspension feeding bivalve molluscs have been studied since the nineteenth century (see Viallanes, 1892) . Studies have investigated molluscan feeding mechanisms, filtration capabilities, food assimilation and metabolism. The bulk of this work has been directed towards the mussel Mytilus edulis Linnaeus and the oyster Crassostrea virginica Gmelin (see reviews by Galtsoff, 1964; Ali, 1970; Jorgensen, 1975; 1976; and Winter, 1978). More recently the growth of mussels, oysters, clams and scallops has been quantitatively studied in controlled systems to assess the biological potential of these molluscs in an aquaculture setting …

The Comparative Ecology Of Two Populations Of The Troglobitic Isopod Crustacean Lirceus Usdagalun (Asellidae), James Alexander Estes

Biological Sciences Theses & Dissertations

Aquatic communities of two caves in Lee Co., Virginia, were compared, and an examination was made of the life history phenomena of the troglobitic isopod Lirceus usdagalun. Measurements of physical and biological parameters were made in Thompson Cedar Cave and Gallohan Cave No. l. A contagious distribution was exhibited by populations of L. usdagalun in both caves and also by the population of another troglobitic isopod, Caecidotea recurvata, in Gallohan Cave No. 1. This distribution was attributed to aggregations of individuals which were considered to occur in areas of preference or optimal habitat patches. Lirceus usdagalun exhibited a …

The Effect Of Pigments In The Flotation De-Inking Of Newsprint, Harold M. Cody

Paper Engineering Senior Theses

This study was performed to determine the effect of the addition of pigments in the flotation de-inking of newsprint. It has been proposed that pigments aid in the flotation and removal of ink. Two pigments were investigated: talc and diatomaceous earth.

The addition of talc caused the brightness of the sheets to drop because the talc became heavily concentrated with ink. The addition of diatomaceous earth to the cell had no effect upon the flotation and removal of the ink. Therefore the addition of pigments to improve ink flotation and removal cannot be justified.

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. …

Review Of The Desert Pocket Gopher, Geomys Arenarius (Mammalia: Rodentia), Stephen L. Williams, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

The desert pocket gopher (Geomys arenarius), which occupies a restricted geographic range in Texas, New Mexico, and Chihuahua, was examined for morphological variation. Univariate and multivariate analyses were used to determine age, sexual, individual, and geographic variation. Significant differences were found among different age classes and between sexes. Males displayed higher individual variation than females and external measurements were more variable than cranial measurements. Two subspecies--G. a. arenarius and G. a. brevirostris--were recognized after analyses of geographic variation.

An Emulsion Dye Laser, Kenneth Lee Matheson, James M. Thorne

Faculty Publications

A laser dye which is insoluble in water has been dissolved in hexane and emulsified in a water matrix. When pumped with a nitrogen laser, this mixture was observed to lase. The emulsion is superior to a simple hexane solution because the excellent thermo-optical properties of the water matrix help prevent refractive-index gradients from degrading laser performance. This is a useful characteristic for flash-pumped dye lasers, laser-pumped dye lasers, and liquid filters. Another type of solvent system, a critical solution, is also discussed. For certain dyes, a critical solution has even better thermo-optical properties because of its ability to absorb …