Physical Sciences and Mathematics Commons^™

Survey Of 1985 Periodical Cicada (Homoptera: Magicicada) Emergence Sites In Washington County, Arkansas, With Reference To Ecological Implications, Douglas A. James, Kathy S. Williams, Kimberly G. Smith

Journal of the Arkansas Academy of Science

Systematic roadside surveys were conducted in June 1985 in Washington County, Arkansas, to locate areas where 13-year periodical cicadas had emerged during May. Although cicadas were found in a variety of upland and bottom land forest habitats, the present cicada distribution reflects the original forest and prairie pattern in the county, even though those boundaries are now largely lost. This suggests a high degree of philopatry whereby emergency areas have remained in the same area for the last 100 years. All present day emergence areas are within the White River drainage, suggesting that it was the main cicada dispersal route …

The Influence Of Lobster Trap Escape Gaps On Capture And Behavior Of The Spiny Lobster, Panulirus Argus (Latreille), Denis William Frazel

HCNSO Student Theses and Dissertations

Interest in the potential usefulness of lobster trap escape gaps in the Florida spiny lobster fishery prompted an independent examination of their influence on capture and behavior of the spiny lobster, Panulirus argus. A trapping study was conducted off Southeastern Florida during 1984/1985 using control traps, and traps with escape gap openings of 51, 54, and 57 mm. The 51 mm escape gap caught significantly more legal lobsters than any other trap, while the 54 and 57 mm escape gap caught significantly fewer sublegal lobsters. Carapace lengths of lobsters increased as escape gap width increased.

The impact of escape …

Wheat Growth On Saline Waterlogged Soils, E G. Barrett-Lennard

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

Studies of the growth of plants on salt-affected soils have focused maily on the effects of salt. However, many salt-affected soils are also subject to waterlogging. Glasshouse experiments conducted by the Department of Agriculture have shown that although wheat growth is not greatly reduced by low levels of salt under well drained conditions, under waterlogged conditions such levels of salt can have a severe effect.

The York River: A Brief Review Of Its Physical, Chemical And Biological Characteristics, Michael E. Bender

Reports

The purpose of this paper is to provide an overview of the physical, chemical and biological characteristics of the York River, Virginia. The river is formed by the confluence of the Mattaponi and Pamunkey rivers at West Point, Virginia. It is tidal over its entire length and flows to the western shore of Chesapeake Bay.

Row Spacing And Cereal Crop Yield, R N. Burch, M. W. Perry

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

Cereal growers in western Australia have, traditionally, burned cereal stubbles. Burning stubble residues reduces weed seed populations and fungal pathogens, but its main purpose has been to eliminate straw which might cause blockages od seeding machinery and por see-bed preparation in the time critical seeding operation.

In 982, the Department of Agriculture began a project to determine whether wider spaced rows also depressed cereal yields in Western Australia. This article summarises some of the important results from that work.

A Review Of The Management And Current Status Of Northern Fur Seals Of The Pribilof Islands, Holly Hansell

Marine Affairs Theses and Major Papers

The North pacific fur seals of Alaska's Pribilof Islands have been subjected to commercial harvest for nearly 200 years. The harvest has been regulated under international agreement almost continuously since 1911; first under the 1911 North Pacific Fur Seal Convention, and following that under the 1957 Interim Convention on Conservation of North Pacific Fur Seals. Both Conventions banned pelagic sealing and divided the restricted land harvest among the four member states, the United States, Canada, Japan, and the Soviet Union. Management under the 1911 convention resulted in a steady increase in the severely depleted fur seal herd, restoring the population …

The Development Of The Shrimp Mariculture Industry In Ecuador And Its Impact On The U.S. Market, Richard A. Norton

Marine Affairs Theses and Major Papers

The demand for tropical shrimp is increasing at a much higher rate than other fish and seafood commodities. With this increase in demand, there has been enormous interest to expand global shrimp production. Mariculture, the term used to describe the practice of farming animal and/or plant life from the sea, has created new opportunities and problems for the future of the global shrimp industry. Since shrimp is considered a high-value food commodity, the development has drawn interest from many United States and European investors. One country in particular, Ecuador, which will be the focus of this discussion, has exemplified many …

Satellite Remote Sensing And Fisheries Applications, Holly M. Turton

Marine Affairs Theses and Major Papers

Satellite remote sensing has the capacity to aid the three major components of a fishery: research, management, and the fishing industry. An evaluation of the potential of satellite-derived data to the fishery is based upon six case studies which are presented as evidence of the capabilities of satellite-borne sensors. Peripheral applications pertaining to the marine environment and possible applications for the future are reviewed. Three basic categories of remote sensing programs related to the fishery are defined: one to test the applicability of the technology to the field of fisheries; another to employ the technology to fisheries research; and a …

Investment Opportunities In The Nigerian Fishing Industry, Ayotunde M. Giwa

Marine Affairs Theses and Major Papers

The major problem facing the Nigerian fishing industry is in its inability to satisfy the demand for tasty yet inexpensive animal protein. Nigeria's marine biological resources are limited and the Gulf of Guinea is among the poorest in the whole of West Africa. Nigeria's population is estimated to have reached about 100 million and is growing at 3.09 per cent per annum. Nigeria's fishing industry is multi-sectoral and composed of the riverine, lake, coastal, estuarine, and culture fisheries. Together they constituted about 1.5 per cent of the GDP in 1976. Up to the present moment, the National has relied on …

Radish Control In Lupins, Weed Control In Lupins, Peas - Broadleaf Weed Control, Peas - Post Emergence Grass Control, Grapevines - Herbicide And Fruit Quality., D. J. Gilbey, R. Klemm

Experimental Summaries - Plant Research

Radish control in lupins simazine "top up", 86N085. Radish control in lupins diflufenican, 86 GE 42, 86 MO 33, 86 ME 83. Radish control in lupins probe, 86 TS 33, 86 GE 41. Radish control in lupins simazine and atrazine, 86 GE 43, 86 MO 34, 86 NO 87, 86 LG 41. Capeweed control in lupins simazine and atrazine, 86 LG 41. Radish control in lupins, 86 TS 38. Radish control in lupins post emergence herbicides, 86 WH 68. Radish control in lupins post emergence herbicides, 86 MO 42. Radish control in lupins post emergence duiron and 2,4-db, 86 GE …

Factors Affecting Anion Movement And Retention In Four Forest Soils, D. W. Johnson, D. W. Cole, H. Van Miegroet, F. W. Horng

Watershed Sciences Faculty Publications

Three hypotheses concerning the movement and retention of anions in forest soils were tested in a series of laboratory and field studies on two Tennessee Ultisols with mixed deciduous forest cover and two Washington Inceptisols, one with deciduous (red alder Alnus rubra Bong.) and one with coniferous [Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco] forest cover. The first hypothesis, that sulfate and phosphate retention was related to adsorption to free Fe and Al oxides, which were in turn related to soil parent material and degree of weathering, was not supported by results of laboratory and field studies. The young, relatively unweathered Washington …

Proceedings -- National Wilderness Research Conference: Current Research, United States Department Of Agriculture, Forest Service

Forestry

Includes more than 70 reports of current wilderness research. Papers are organized around nine topics: wilderness resource research, including natural fire, air quality, impacts to soil and vegetation, fish and wildlife, and water; and wilderness user research related to recreational use and user characteristics, attitudes and behavior, benefits, and management concepts and tools.

Fungicide Testing, M. J. Barbetti

Experimental Summaries - Plant Research

Fungicidal control of Phoma blackstem disease in medic, 86 KA 11. Medic cultivar susceptibility to Phoma blackstem disease, 85 KA 56. Role of Phoma seed infection in medic, 85 KA 57. Effect of soil pasteurization on damage caused by six fungal root pathogens, 86 PE 53. Susceptibility of 18 sub-clover cultivars to isolates of the clover scorch fungus, Kabatiella caulivora, 86 PE 54. Effect of plant age or growth stage of subterranean clover on susceptibility to infection by the clover scorch fungus, Kabatiella caulivora, 86 PE 55. Susceptibility of rapeseed lines to blackleg crown canker, 86 MT 1, 86 MT …

Root Diseases Of Cereals., G. C. Macnish

Experimental Summaries - Plant Research

Take-all Effects of nitrogen source on take-all 82N34, 77E4. Take-all and rates of PP450 and Bayleton 86MT40. Take-all and control by lupins 86MT6. Take-all and field inoculation rates, 86MT58. Take-all and fumigation, 86MT57. Rhizoctonia root rot Rhizoctonia patch and soil compaction, 86E39. Rhizoctonia patch and short chemical fallow, 86E40. Rhizoctonia root rot and Glean, 86E42. Rhizoctonia strains-and paddock history, 86E31. Rhizoctonia root rot - host effects on strains, 86BA38, 85E28, 86E30.

Lupin Root Rot, Lupin Hypocotyl Rot, Rhizoctonia Coleoptile Rot Of Wheat, Rhizoctonia Root Rots In Long Term Wheat-Pasture Rotation Trials., M. Sweetingham

Experimental Summaries - Plant Research

Lupin Root Rot: 86Cl4, 86WH15, 86ME85, 86LG63, 85C63, 86WH14. Lupin Hypocotyl rot, 86BA49, 86BA21. Rhizoctonia coleoptile rot of wheat, 86BA19, 86BA20 Rhizoctonia root rots in long term wheat-pasture rotation trials.

Root And Foliar Diseases Of Wheat On Sandplain In The Geraldton Region., J. Wilson

Experimental Summaries - Plant Research

Leaf disease trial, 86C69. Drench trial, 86C70. Fumigation trial, 86C71. Three springs trial, 86TS31. Soil transfer trial, 86C98. Wheat leaf disease control trial, 86C99. Water use rotation trial, 86C63. Cultivation, naraling (jarvis), 82GE38. Wheat diseases, survey.

Summary Of Rhizobium Experiments., J. G. Howieson

Experimental Summaries - Plant Research

Rotation trials, 84ME32, 84ME24, 84N18, 84M18, 85KA58. Cross row trials, 85M28. One year trials, 86M41, 86M42. On-going trials, 86M58, 85KA64, 86V3, 86AL. 84WH24.

Iowa Academy Of Science Directory, 1986-87: Officers, Committees, And Membership Roster, Iowa Academy Of Science

Iowa Academy of Science Documents

Table of Contents:

Board of Directors ... 4
Program Directors ... 5
Section Chairs ... 6
Section Vice Chairs ... 9
Committees ... 12
Award Recipients ... 29
Past Presidents ... 31
Membership Roster ... 32
Constitution and Bylaws ... 43
Editors ... 54
Meeting Dates ... 55

The Iowa Science Teachers Fall Conference, 1986, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

--- Keynote Speaker: Dr. Carolyn Sumners
--- Sessions
--- Registration Form

Sediment Processing And Selective Feeding By Pectinaria Koreni (Polychaeta: Pectinariidae), Fred C. Dobbs, Teresa A. Scholly

OES Faculty Publications

Pectinaria (Lagis) koreni (Malmgren) is an abundant, deposit-feeding, infaunal inhabitant of shallow-water marine environments in northern Europe. Laboratory experiments were performed to quantify the polychaete's sediment processing in 2 distinct sediments, 1 fine-grained and high in combustibles, the other coarse-grained and low in combustibles. Gut passage time and time to pseudodefecation were predictable only in coarse-grained sediment. In both sediments, reworking rate increased with worm size and over time, although temporal patterns differed in the 2 sediments. The ratio of pseudodefecated sediment to defecated sediment did not differ significantly over time in either sediment, but the ratio was greater in …

Late Prehistoric And Protohistoric Large Mammal Zoogeography Of Virginia, Robert K. Rose

Biological Sciences Faculty Publications

Evidence derived from18late prehistoric (middle and late Woodland Period) archeological sites, from several early historical accounts, and from the current understanding of the distribution of Virginia mammals indicates that the large mammal fauna of the Commonwealth has not changed substantially within the past 4,000 yrs. Some species (e.g., bison, elk, timber wolf, and mountain lion) have been extirpated since the settlement of Virginia by Europeans; some previously extirpated species (e.g., porcupine, coyote, and beaver) have been naturally or artificially reintroduced during the historical period, and others (e.g., woodchuck and red fox) probably have expanded their distributions as a result of …

Grazing And Management Of Saltland Shrubs, C V. Malcolm, J. E. Pol

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

areas of bare saltland on farms need not be unproductive etesores. Many Western Australian farmers are now successfully growing salt-tolerant or halophytic shrubs such as bluebush (Maireana brevifolia), saltbushes (Atriplex spp.) and samphires (Halosarcia spp.) on these areas.

Department of agriculture trials and farmers' experience indicate that if saltland is planted with recommended shrubs, it can provide two months' valuable grazing for sheep during autumn and early winter, a time when paddock feed is scarce. Research by the Department has also identified a range of salt-tolerant shrubs suited to the various types of saltland.

Grazing trials to …

Native Hay Production Along A Depth-To-Water-Table Gradient In Eastern Sandhills Wet Meadows, Wheeler County, Nebraska, Jean M. Novacek

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The Sandhills region of Nebraska, the largest dune field in the Western Hemisphere, occupies 15 north-central counties and extends over 51,800 km (20,000 mi) (Keech and Bentall, 1971; Ahlbrandt and Fryberger, 1980). Far from a desert, the Sandhills region is entirely vegetated by mixed-grass prairie with numerous wet areas and lakes in interdunal valleys. This rich, grass-covered dune sea stretches 427 km (265 mi) across from east to west and 209 km (130 miles) from north to south. The altitudes range from 670 m (2200 ft) above sea level in the eastern part to 1310 m (4300 ft) in the …

Analysis Of The Charleston, Illinois Water Supply For The Presence Of Organic Mutagens Utilizing The Ames Salmonella/Microsome Assay, Steven Lee Washburn

Masters Theses

Water samples from the Charleston, Illinois water supply and selected agricultural run-off areas were tested for the presence of organic mutagenic chemicals. The Ames Salmonella/microsome mutagenicity assay utilizing strains TA98 and TA100 was used to analyze concentrated water samples. A special set of samples was exposed to the S9 activation system coupled with the TA98 strain to simulate the mammalian metabolic system.

No mutagens were detected in any of the samples tested. Several positive and negative control systems were included in the testing system. Negative control systems were used to determine the average spontaneous reversion rates for each strain for …

The Use Of Crab Meal As A Supplemental Food For Juvenile Hard Clams (Mercenaria Mercenaria), Patricia Lynn Duncan

Dissertations, Theses, and Masters Projects

No abstract provided.

Serradella Prospects At Esperance, Michael D A Bolland

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

Yellow serradells is a promising introduced annual legume suitable for some of Western Australia's well drained sandy acid soils where other pasture legumes failto persist.

In the Esperance area serradella grows siccessfully on some sandy soils more than 0.5 metres deep. I develops deep roots rapidly - up to three times deeper than subterranean clover - and this is probably the main reason for its persistance.

At present only two late maturing, registered serradella cultivars are available to farmers in southern Australia. This article describes research at Esperance to delect earlier flowering cultivars for persistence in areas with less than …

Biological Control Of Parkinsonia, W M. Woods

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

One of the most troublesome weeds in northern Australia'a lastoral country is Parkinsonia aculeata, commonly called Parkinsonia, Jerusalem Thorn, Palo Verde or Retama. In 983 Western Australia, ueensland and the Northern Territory started a joint biological control programme against this perst by sending the author overseas to search for its natural predators in southern USA, Mexico and Central America. A few insects show promise and one, a bruchid beetle Mimosetes ulkei, is being tested under Quarantine in Queensland.

Agricultural Progress On The Ord, D A. Mcghie

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

This is the first of occasional articles describing the experimental and commercial activity on the Ord River Irrigation Area (ORIA) in Western Australia's Kimberley region.

Against a background of extensive recources of land and water, a sometimes cimatic advantage and a complementary disadvantage of a remote location, agriculture on the Ord has swung from various monocultures to a broadly based and diversified production. In 1986, the value of agricultural production on the Ord will approach values equivalent to those of the cotton era for the first time since the demise of that industry 12 years ago.

Biological Review And Commercial Whelk Fisheries Analysis Of Busycon Carica With Comments On B Canaliculatum And B Contrarium In Virginia, Jane Dicosimo

Dissertations, Theses, and Masters Projects

No abstract provided.

In Situ Growth And Chemical Composition Of The Giant Kelp, Macrocystis Pyrifera: Response To Temporal Changes In Ambient Nutrient Availability, Richard C. Zimmerman, James N. Kremer

OES Faculty Publications

Temporal variations in growth of the giant kelp Macrocystis pyrifera were examined in relation to ambient nutrient availability and chemical composition of mature blades, the primary site of nutrient and carbohydrate storage in M. pyrifera. The effect of nutrient availability on growth was well approximated by a Monod rectangular hyperbola, with growth saturating at ambient nitrate concentra- tions between 1 and 2 FM. M. pyrlfera was unable to generate nutrient reserves that would last beyond 30 d. Nitrogen reserves were stored as free amino acids, and generally constituted about 10 % of total tissue nitrogen. Total nitrogen content was …