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Trophic Dynamics Of A Nebraska Black Crappie And White Crappie Population, Daryl G. Ellison

Nebraska Game and Parks Commission: Staff Research Publications

Diet variations of black crappie (Pomoxis nigromaculatus) and white crappie (Pomoxis annularis) were investigated at Hayes Center State Lake, a turbid 20-hectare state lake in southwest Nebraska. Zooplankton and insects accounted for most of the diet of all black crappie and of white crappie less than 200 mm long. The daily ration of planktophagic crappie declined to 1.3% as both species approached a length of 200 mm. Black crappie longer than 200 mm did not convert to fish and the daily ration declined to 0.8%. The dietary shift of white crappie to fish significantly increased the …

Two New Species Of The Siphonoecetes Complex From The Arabian Gulf And Borneo (Crustacea: Amphipoda), J. L. Barnard, James Darwin Thomas

Marine & Environmental Sciences Faculty Articles

A new species, Siphonoecetes arabicus, is described from the Arabian Gulf, and a new species B. wongi is described in the new genus Borneoecetes from Borneo. The former species does not fit recently described subgenera, thus indicating a necessary reassessment of those taxa.

Acanthohaustorius Pansus, A New Species Of Sand-Burrowing Amphipod From Looe Key Reef, Florida Keys, With Redescription And Distribution Data Of Acanthohaustorius Bousfieldi Frame, 1980 (Amphipoda: Haustoriidae), James Darwin Thomas, J. L. Barnard

Marine & Environmental Sciences Faculty Articles

A new species of sand-burrowing amphipod, Acanthohaustorius pansus, is described from carbonate sands of the Florida Keys Reef Tract. This is the first time the predominantly cold-water genus Acanthohaustorius has been reported south of Virginia coastal waters. Acanthohaustorius bousfieldi Frame, 1980, originally described from Long Island Sound, is refigured and reported from shell-hash sediments off the central Atlantic coast of Florida. A revised key to the species of Acanthohaustorius is presented.

Research Objectives In Vertebrate Pest Control, A J. Oliver

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

The European rabbit, introduced into Australia in 856 by an early settler for hunting, caused massive losses to agricultural production in Western Australia in 1940s and 1950s.

In those years most of the country's recources and efforts allocated to vertebrate pest problems were aimed at controlling this animal.

Research and control measures by Commonwealth and State agencies, including the introduction of myxomatosis, were largely responsible for reducing the rabbit problem to the comparatively minor one it is now.

Today, the Agricultural Protection Board is involved in the control of a much wider range of mammals and birds which cause losses …

Rabbit Kitten Survival In The South-West, D R. King

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

In the South-West of Western Australis reliable winter rains allow the rabbit breeding season to extend through winter and spring, and thus a large number of kittens are produced each year.

Studies on the biology of rabbits at Cape Naturaliste (270 kilometres south-west of Perth) and Chidlow (40 kilometres east of Perth in the Datling Range) have shown that at these sites each doe produces about 30 and 27 kittens respectively a year. If all these youg rabbits survived, there would be a 15-fold increase in numbers. Within a short time the State would be covered "wall to wall" by …

Rabbits North Of Carnarvon, D R. King

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

In Westeern Australia rabbits are mainly a pest along the south-western coastal parts of the State, but there are populations north of the Tropic of Capricorn. Rabbits after crossing the Nullarbour plain from South Australia and colonising the South-West of the State, were reported to have reached the west coast near Geraldton by 1912 and then spread northwards.

There is little information on the biologhy of rabbits in the northan parts of their range, but pastoralists in some areas are concerned about erosion and damage to vegetation on their stations when rabbits reach high numbers.

The Agricultural Protection Board undertook …

Algal Growth And The Phosphorus Cycle, Arthur J. Mccomb, K. S. Hamel, A. L. Huber, D. K. Kidby, R. J. Lukatelich

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

Larger algae and microscopic phytoplankton foul the waters of the Peel-Harvey estuarine system, upsetting the fishery and polluting the beaches.

These aquatic plants grow in response to phosphorus runoff from drainage, trapping phosphorus in the estuary and using it in their growth. When they die this phosphorus remains in the system to be recycled for further plant growth.

Algal pollution in the estuary can be lessened by reducing the amount of phosphorus entering the system, increasing phosphorus losses to the ocean, or in some way blocking the trapping and recycling processes.

Soil Acidity And Legume Nodulation, J G. Howieson, M. A. Ewing

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

Nitrogen is a basic constituent of protien and is essential to all forms of life. Many agricultural plants are legumes - a group of plants which, in co-operation with specialised soil bacteria, fix their own nitrogen from the air. When the legume dies, the organic matter breaks down anf the nitrogen becomes available to the following crops.

Soil acidity is a major factor limitimg the successful association between legumes and their beneficial soil bacteria in Western Australia.

Die Mongoleisammlung Im Herbarium Der Martin-Luther-Universität Halle-Wittenberg, Werner Hilbig

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Das Herbarium der Martin-Luther-Universität Halle-Wittenberg besitzt eine umfangreiche Sammlung von Pflanzen aus der Mongolei. Das im wesentlichen während gemeinsamer deutsch-mongolischer biologischer Expeditionen gesammelte Material liegt als selbständige Sammlung vor. Sie enthält ca. 8000 Bögen höherer Pflanzen und umfaßt ca. 1300 determinierte Arten. Ein bedeutender Teil wurde von Spezialisten bestimmt. Umfangreich sind auch die Aufsammlungen von Flechten und Moosen , geringer die von Pilzen. Es konnten hierbei wie bei den höheren Pflanzen zahlreiche Erstnachweise erbracht werden.

In der Hauptsammlung des Herbariums sind Herbarbelege v on Pflanzen des mongolischen und südsibirischen Raumes aus dem 19. Jahrhundert enthalten, z. T. von A . …

Zur Verbreitung Und Chemie Von Flechten Der Mongolischen Volksrepublik, Siegfried Huneck, Josef Poelt, Teuvo Ahti, Orvo Vitikainen, Ulzijn Cogt

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Für das Gebiet der MVR werden Fundpunkte von 102 Flechtenart;en mitgeteilt. Davon sind 11 Arten neu für die MVR. 21 Arten wurden chemisch analysiert.

На территории МНР были собраны на разных местах 102 вида лижайников. Из них 11 вид является нозыми для МНР и для 21 вида проводился химический анализ.

Vergleichend Biologisch-Ökologische Untersuchungen In Hochgebirgen Der Nordwest- Und Südmongolei: Allgemeiner Bericht, Werner Hilbig, Michael Stubbe, N. Dawaa, Z. Schamsran, M. Dorn, K. Helmecke, D. Bumžaa, K. Ulykpan

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

In den Jahren 1976 bis 1978 führten Biologen der Martin-Luther-Universität HalleWittenberg und der Staatlichen Mongolischen Universität Ulan-Bator Arbeiten zur Höhenstufenzonierung des Charchiraa-Gebirges in der Nordw estmongolei d urch. In der Steppen- (1340 m), Lärchenwald- (2150 m) und alpinen Zone (2375 m) wurden Meßstationen errichtet, in denen über mehrere Wochen der Monate Juni bis August gearbeitet wurde. Paralleluntersuchungen konnten im Juni/Juli 1979 in dem ariden Gebirgszug Ich-bogd im Gobi-Altai (Halbwüste 1300 m, Bergsteppe 2500 m, alpine Matte 2740 m) durchgeführt werden. Der allgemeine Bericht .informiert über Aufgabenstellung, Ablauf der Expeditionen, Untersuchungsmethoden, Lage, Geologie und Klima der Untersuchungsgebiete sowie über allgemeine Erkenntnisse …

A Three Part Research Report: The Synthesis Of Potential Insecticides, N-(4-Heteroaryloxybenzoyl)-N'-(2,4-Dichlorobenzoyl) Hydrazines: A Reinvestigation Of Hexamethylphosphoramide With Ketoximes; Regioselective Fluoralkoxylation And Polyfluoroalkoxylation Of Activated Dihalobenzenes And Dihaloheterocycles, Gary A. Decrescenzo

Retrospective Theses and Dissertations

This report discusses research in three areas of organic synthesis: The synthesis of potential insecticides; the reinvestigation of the reaction of hexamethylphosphoramide with ketoximes; and the regioselective fluoroalkoxylation and polyfluoroalkoxylation of activated dihalobenzenes and dihaloheterocycles. In Part I, a series of N-(4-heteroaryloxybenzoyl)-N'-(2, 3-dichlorobenzoyl) hydrazines are synthesized, and attempts at cyclic dehydration to the corresponding 2, 5-disubstituted-1, 3, 4-oxadiazoles are discussed. In Part II, the synthesis of N, N-dimethyl-N'-aryl amidines by the reaction of aryl alkyl and diaryl ketoximes with HMPA is discussed. In Part III, a series of activated dihalobenzenes and dihaloheterocycles are reacted with sodium trifluoroethoxide to study the …

The Probe, Issue 39 - January 1984

The Probe: Newsletter of the National Animal Damage Control Association

The Probe National Animal Damage Control Association
No. 39 January, 1984
Sixth Great Plains ADC Workshop
11th Vertebrate Conference
Conservation
Coyote Lure Operative Devices
Dyssodia tephroleuca (ashy dogweed)
Brown pelican
Growing moose herd
Letters to Ye Ed
Mountain Lion
Rodents, Birds, and Pigs
Oak Ridge Scientists
New Coyote Lure
Washington State ADC Program
Imperial Chemical Industries of Australia
Snobs
Coyote
Reduction of Non-target Species in Modified Steel Traps

The Impact Of Nitrification On Soil Acidification And Cation Leaching In A Red Alder Ecosystem, H. Van Miegroet, D. W. Cole

Watershed Sciences Faculty Publications

The objectives of this study were to investigate the impacts of internal nitrification on soil and soil solution acidity and on the rate of nutrient export through NO3– mediated leaching. This was achieved by comparing soil chemical properties and soil solution composition within a naturally N-rich red alder (Alnus rubra Bong.) ecosystem to those of an adjacent Douglas-fir [Pseudotsuga menziesil (Mirbel) Franco] forest where soil N levels were significantly lower and no measurable HNO3 production could be observed. In the red alder system, where > 100 kg ha–1 yr–1 of N were added through symbiotic N2 fixation, the net annual NO3– …

Lupin Growth And Water Use; Wheat, Barley, Pea, Rob Delane, J. Hamblin, A Bishop Ms

Experimental Summaries - Plant Research

84C16/84C17 Lupin Growth and Water Use. 84C19 Effect of Density and Nitrogen on Growth and Yield of Uniculm and Tillering Wheat. 84C20 Maturity, Nitrogen and Density Effects of Barley. 84C21 Wheat Variety Trial. 84C18/23/28/33 Pea Research in the Geraldton Region. 84C32 Effect of Terra Sorb on Wheat Yield.

Ecology Of Skeleton Weed (Chondrilla Juncea) In Western Australia, F D. Panetta

Experimental Summaries - Plant Research

For the first time a laboratory for conducting this type of research has been established in South Perth, and it has been possible to type plants from mature leaf material. This obviates the necessity of waiting for plants to seed to be able to identify them. A total of six new collections were identified as belonging to either the broad-leaf or narrow-leaf forms, the locations for which are given in Table l.l..

Seed viability. To determine the amounts, viability and dormancy status of seeds produced by field-grown plants during summer and autumn months. Time course of seed production by field-grown …

Pleiochaeta Soil Survey, M Sweetingham

Experimental Summaries - Plant Research

1. Pleiochaeta soil survey - Moora District, March 1984. 2. Lupin root rot trials - 84A40, 84BA26, 84GE50, 84GE56, 84MO82, 85NO59, 84WH28. 3. Fungicides for Rhizoctonia patch control - 84E25, 84E28. 4. 83WH29 : Effect of rotation on wheat diseases. 5. Root disease in long term wheat-lupin rotation trials - 68E5, 79GE37, 80TS2, 81LG29, 82M26.

Foliar Disease Of Wheat, A. G. P. Brown

Experimental Summaries - Plant Research

Wheat leaf diseases were at much reduced levels in 1984. This may have been caused by prolonged summer rain prematurely setting off dispersal of spores and also initiating microbiological breakdown of stubble residues. No survey was carried out in 1984 but a good indication of the seasonal effect can be gained by noting that in the spray-timing experiment at Badgingarra disease levels were extremely low until the end of August some 90 days after sowing. Timing of fungicide for Septoria and Yellow Spot control. 84BA32, 84GE59. Effect of Yellow-spot at Merredin (with S. Trevenen) 84ME57. Yellow-spot is common though not …

Molybdenum Nutrition, M M. Riley

Experimental Summaries - Plant Research

Field trials. 1. Residual value of Molybdenum on an acid soil - 81NO40. 2. Residual value of Molybdenum on an acid soil - 81M2. 3. Residual value of Molybdenum on an acid soil - 81LG12. 4. Residual value of Molybdenum on an acid soil - 83ME82. 5. Residual value of Molybdenum on and acid soil - 82NO7. 6. Residual values of different Molybdenum sources - 84ME10. 7. Residual values of different Molybdenum sources - 84GE49. 8. Molybdenum requirements of wheat and lupins - 83ME10. 9. Molybdenum requirements of wheat, triticale and lupins - 84ME8. 10. Forms and rates of soil …

Grain Legume Agronomy Program, G H. Walton

Experimental Summaries - Plant Research

Lupin Agronomy - varieties x environment - Wongan Hills R.S., Badgingarra R.S., Newdegate R.S., Mt Barker R.S. Lupin Agronomy - morphology x split seed – Mr J. wood, “Karakin”, Lancelin. Lupin Agronomy - Erregulla regeneration and rotation – Lancelin, Moora, Watheroo. Grain legume species comparison – 84ES1, 84LG38, 84MO10, 84ES1. Field pea evaluation – varieties. Aim: To compare the biological and seed yield adaptation to environment between morphological types of field pea. Field pea agronomy – 84KA18, 84LG25, 84ME42, 84MO33, 84MO34, 84N16, 84SG20, 84SG28. Sowing time x seed rate. Pea and wheat response to applied P – 84LG24, 84ME43, 84NO46, …

The Ecology Of Skeleton Weed .(Chondrilla Juncea L.) In Western Australia , Afghan Thistle (Solanum Hoplopetalum) Ecology, J. Dodd

Experimental Summaries - Plant Research

1. The ecology of skeleton weed .(Chondrilla juncea L.) in Western Australia - 84PE18 Seed production and water use in the glasshouse. 1.2 Seed production and water use of field-grown skeleton weed (84BA17, 84BA18). Water use. 1.3 Germination in relation to soil water content. 2. Afghan thistle (Solanum hoplopetalum) ecology. 2.1 Water relations (84N048). 2.2 Growth in Afghan thistle (84N050). 2.3 Afghan thistle reproductive biology (84N049, 84N063, 84PE19).

Effect Of Various Crop And Pasture Species On The Growth Of A Subsequent Wheat Crop, N Delroy, J W. Bowden, I Rowland, M Ralph, R Lunt, M Baker

Experimental Summaries - Plant Research

83WH29: The effect of various crop and pasture species on the growth of a subsequent wheat crop. Aim: To characterise the effect of various crop and pasture species on the growth and yield components of a subsequent wheat crop with special emphasis on the nitrogen nutrition of that crop. To provide validation data for modelling wheat growth and nitrogen uptake. Measurements: Factors to be monitored through time were; Soil moisture profiles; Mineral nitrogen profiles; Root growth profiles; Top growth and nitrogen uptake; Development score; Incidence of disease and pests.

Seasonal notes, trial design, weed diseases and pests. Results: The results …

Tackling The Problem Off The Farm, C M. Croft

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

Methods of redusing phosphorus losses from the catchment soils of the Peel-Harvey esturine system have been discussed in other articles in this Journal.

This article briefly discusses a range of 'off the farm' techniques to improve phosphorus flushing from Peel Inlet or Harvey Estuary to the sea and to treat the phosphorus and the algae. These techniques were among more than 100 management options evaluated by the Peel-Harvey Study Group.

Gradual Phyletic Evolution At The Generic Level In Early Eocene Omomyid Primates, Kenneth D. Rose, Thomas M. Bown

United States Geological Survey: Staff Publications

Analysis of dental morphology in over 600 stratigraphically controlled specimens of tarsier-like primates from early Eocene strata in Bighorn Basin, Wyoming, provides important new data for understanding the tempo and mode of evolution in primates.

University Of Texas At Tyler Catalog, 1984-1986, University Of Texas At Tyler

Catalogs

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Effects Of N-Substituents On The Polymerization Properties Of Maleimide, Dilip R. Abayasekara

Theses and Dissertations

The effect of the amide function and the carbethoxy function on the polymerization properties of maleimide are reported. The effects of these functions on homopolymerization and copolymerization (with styrene) were examined. These electron-withdrawing groups appeared to decrease the rate of homopolymerization and increase the rate of copolymerization.

N-carbamylmaleimide and N-carbethoxymaleimide were copolymerized with styrene in 1,4 -dioxane at 60.0° C at different feed ratios to high conversion. Copolymer composition, determined by elemental analysis and 1H NMR, indicated that while 1:1 copolymers were obtained with an equimolar feed ratio, the two systems were not alternating. It is of note that the …

Factors Affecting Water Quality And Microinvertebrate Distribution Within A Small Black Hills Stream, Henry G. Drewes

Electronic Theses and Dissertations

A comparative evaluation of the benthic macroinvertebrate fauna was conducted concurrently with a physiochemical investigation on Slate Creek, Pennington County, South Dakota in the Black Hills. Water quality differences between years and among stations were detected in Slate Creek from both physiochemical and macroinvertebrate evaluations. The primary sources of disturbance to the Slate Creek study site during the sampling period were landscaping activities within the Deerfield Park Resort development and livestock activity. Increased runoff and elevated stream flows in 1982 were responsible for the variation in water quality between years. Water quality differences among stations indicated significantly (P < 0.05) higher turbidity and temperature immediately below the development site in 1981 and 1982. Significantly (P < 0.05) higher fecal coliform bacteria counts were observed at station 5 for both years, resulting from increased livestock activity. Phosphates and nitrates were highest at stations 4 and 5 but were not significantly (P > 0.05) different …

Rainbow Trout Cage Culture And Benthic Production In East-Central South Dakota Dugouts, Glenn David Schuler

Electronic Theses and Dissertations

Forty-five cages, encompassing 1.0 m3 of water, distributed between three dugout ponds, were stocked with rainbow trout (Salmo gairdneri) fingerlings to determine the feasibility of raising annual fish crops. Growth rates were compared between feeding rate (0, 3, and 5% body weight/day [bwt/day]) and stocking rate (35, 52, and 70 fish/cage). Growth was significantly (P ≤0.05) greater at feeding rates of 3 and 5% bwt/day than 0% bwt/day. The fish fed 0% bwt/day decreased in mean weight by 0.7 g; the weight gain for the 3 and 5% bwt/day feeding rates were 47.2 and 45.2g, respectively. Significant differences (P ≤ …

A Re-Examination Of The Reactions Of Cyanide With Cytochrome C Oxidase, M. G. Jones, D. Bickar, M. T. Wilson, M. Brunori, A. Colosimo, P. Sarti

Chemistry: Faculty Publications

Experiments were performed to examine the cyanide-binding properties of resting and pulsed cytochrome c oxidase in both their stable and transient turnover states. Inhibition of the oxidation of ferrocytochrome c was monitored as a function of cyanide concentration. Cyanide binding to partially reduced forms produced by mixing cytochrome c oxidase with sodium dithionite was also examined. A model is presented that accounts fully for cyanide inhibition of the enzyme, the essential feature of which is the rapid, tight, binding of cyanide to transient, partially reduced, forms of the enzyme populated during turnover. Computer fitting of the experimentally obtained data to …

The Marine Biogeochemistry Of Selenium: A Re-Evaluation, Gregory A. Cutter, Kenneth W. Bruland

OES Faculty Publications

Vertical and horizontal profiles from the North and South Pacific Oceans demonstrate the existence of three species of dissolved selenium: selenite, selenate, and organic selenide (operationally defined). In surface waters, organic selenide makes up about 80% of the total dissolved selenium, selenite concentrations are uniformly low, and selenate concentrations rise with increased vertical mixing. The organic selenide maximum (thought to consist of seleno-amino acids in peptides) coincides with the maxima of primary productivity, pigments, bioluminescence, and dissolved free amino acids. Deep ocean waters are enriched in selenite and selenate, while organic selenide is nondetectable. In suboxic waters of the tropical …