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Articles 17761 - 17790 of 19673
Full-Text Articles in Entire DC Network
Christian Worldview And Scientific World Pictures: A Response To Howard J. Van Till, Richard G. Hodgson
Christian Worldview And Scientific World Pictures: A Response To Howard J. Van Till, Richard G. Hodgson
Pro Rege
This article is a response to a paper presented at the conference "Christian Worldview and a View of Science: The Evolution Debate," held at Dordt College on September 27-28, 1988.
Comparison Of Marine And Terrestrial Ecological Systems, Lter Steering Committee
Comparison Of Marine And Terrestrial Ecological Systems, Lter Steering Committee
Long Term Ecological Research Network
Report of a workshop held in Santa Fe, New Mexico.
A century from now humanity will live in a managed -- or mismanaged -- global garden.
We are debating the need to preserve tropical forests. Farming of the sea is providing an increasing part of our fish supply. We are beginning to control atmospheric emissions. In a hundred years these separate aspects will need to be integrated into a single management system. We shall use novel farming practices and genetic engineering of bacteria to manipulate the methane production of rice fields world-wide. The continental shelf, especially off Asia, will be …
The Prairie Naturalist Volume 21, No.1 March 1989
The Prairie Naturalist Volume 21, No.1 March 1989
The Prairie Naturalist
WINTER RAPTOR USE OF THE PLATTE AND NORTH PLATTE RIVER VALLEYS IN SOUTH CENTRAL NEBRASKA ▪ G. R. Lingle
CHARACTERISTICS OF RUFFED GROUSE DRUMMING SITES IN THE TURTLE MOUNTAINS, NORTH DAKOTA ▪ J. W. Schulz, E. L. Bakke, and J. F. Gulke
USE OF A TRIBUTARY BY FISHES IN A GREAT PLAINS RIVER SYSTEM ▪ J. B. Smith and W. A. Hubert
PLANT AND ANIMAL COMMUNITY RESPONSES TO RESTORED IOW A WETLANDS ▪ T. G. LaGrange and J. J. Dinsmore
COLEOPTERA SPECIES INHABITING PRAIRIE WETLANDS OF THE COTTONWOOD LAKE AREA, STUTSMAN COUNTY, NORTH DAKOTA ▪ B. A. Hanson and G. …
Fisheries Management Paper No.23 - Management Of The South-West Inshore Trawl Fishery., N. Moore
Fisheries Management Paper No.23 - Management Of The South-West Inshore Trawl Fishery., N. Moore
Fisheries Management Papers
This report outlines the management plan for the south west inshore trawl fishery which already operates in coastal waters less than 200 metres deep between Guilderton and Cape Leeuwin.
This management plan takes into account these important concerns and has specifically set aside a strip of coastal area from Cape Bouvard to Cape Leeuwin for recreational usage and for protection of the benthic community, and closed the management zone north of Burns Beach to trawling.
A Report On Marron Fishing In Western Australia., Doug Wenn
A Report On Marron Fishing In Western Australia., Doug Wenn
Fisheries Management Papers
The marroning experience is one enjoyed by many Western Australians. A rapid increase in fishing effort evidenced by the increase in number of recreational fishing licences issued, combined with low rainfall in the last few years resulted in a dramatic reduction of marron catch rates during 1986/87. In view of the state of marron stocks, the Minister for Fisheries considered it appropriate to close the 1987/88 marron season.
Patterns Of Species Co-Occurrence In The Antillean Bat Fauna, Donald A. Mcfarlane
Patterns Of Species Co-Occurrence In The Antillean Bat Fauna, Donald A. Mcfarlane
WM Keck Science Faculty Papers
The bat fauna of 25 Antillean islands is presented as a species presence-absence matrix, and used to construct a large population of randomized null-model matrices by Monte-Carlo simulation techniques. Comparison of the observed data matrix with the randomized population reveals a statistically significant departure from randomness which is interpreted as evidence of community structure. The Antillean bat fauna is marked by a pattern of high species co-occurrence, with endemics dominating in the northern Antilles and undifferentiated South American taxa dominating in the southern Antilles. The 'checkerboard' distributions which have been identified in the bird populations of some tropical archipelagos are …
Agenda For Action - Casco Bay, Department Of Environmental Protection
Agenda For Action - Casco Bay, Department Of Environmental Protection
Maine Collection
Agenda For Action - Casco Bay
Department of Environmental Protection, Augusta, Maine (January, 1989)
Contents: Introduction / The Problems : Bacteria, Toxics, Nutrients / The Solutions / Recommendations / References
Investigation Of Lower Colorado River Valley Desert Soil Mineral And Nutrient Content In Relation To Plant Proximity And Identity, Jane N. Hildreth
Investigation Of Lower Colorado River Valley Desert Soil Mineral And Nutrient Content In Relation To Plant Proximity And Identity, Jane N. Hildreth
Theses Digitization Project
No abstract provided.
Biological Control Of Paterson's Curse, John Dodd, Bill Woods
Biological Control Of Paterson's Curse, John Dodd, Bill Woods
Journal of the Department of Agriculture, Western Australia, Series 4
The long- delayed biological control programme for the weed Paterson's curse (Echium plantagineum) has begun with the release of the leaf mining moth (Dialectica scalariella)' an insect slightly bigger than a mosquito. Yhe caterpillar stage of the moth feeds inside the leaves, producing tunnels and chambers which damage the leaf.
The leaf mining moth has already become established in suitable areas. Although the familiar purple haze of Paterson's curse will continue to be seen for years to come, we expect that the leaf mining moth - and other agents yet to be released - will make it a more manageable …
Riparian Plant Water Relations Along The North Fork Of The Kings River, California, J. L. Nachlinger, S. D. Smith, R. J. Risser
Riparian Plant Water Relations Along The North Fork Of The Kings River, California, J. L. Nachlinger, S. D. Smith, R. J. Risser
Life Sciences Faculty Research
Plant water relations of five obligate ripar-ian species were studied along California's North Fork Kings River. Diurnal stomatal conductance, transpi-ration, and xylem pressure potentials were measured throughout the 1986 growing season and in mid-season in 1987. Patterns were similar for all species although absolute values varied considerably. Maximum stomatal conductance occurred early in the day and season during favorable environmental conditions and decreased as air temperature and the vapor pressure difference between the leaf and air increased. Maximum transpiration rates occurred in mid-morning and mid-summer resulting in estimated daily water losses per unit sunlit leaf area of 163-328 mol H2O …
An Isotopic Analysis Of The Hydrology And Riparian Vegetation Water Sources On Bishop Creek, M. L. Space, J. W. Hess, S. D. Smith
An Isotopic Analysis Of The Hydrology And Riparian Vegetation Water Sources On Bishop Creek, M. L. Space, J. W. Hess, S. D. Smith
Life Sciences Faculty Research
Five power generation plants along an eleven kilometer stretch divert Bishop Creek water for hydro-electric power. Stream diversion may be adversely affecting the riparian vegetation. Stable isotopic analysis is employed to determine surface water/ground-water interactions along the creek. surface water originates primarily from three headwater lakes. Discharge into Bishop Creek below the headwaters is primarily derived from ground water. The average δD and δ18O values are significantly different for surface water and ground water that an isotopic analysis can delineate between these two components of flow. Therefore isotopic shifts along the creek can determine gaining reaches. In addition, by knowing …
Age Assessment Of White Bass From Otoliths, Dorsal Spines And Scales, Raj V. Kilambi, Thoniot T. Prabhakaran
Age Assessment Of White Bass From Otoliths, Dorsal Spines And Scales, Raj V. Kilambi, Thoniot T. Prabhakaran
Journal of the Arkansas Academy of Science
Otoliths, dorsal spines, and scales of 85 white bass collected in1987 from a pre-spawning group were used forage assessment. Agreement between spine and otolith ages were 78.3%, between scale and otolith ages was 68.2%. Unlike spine ages, percent agreement of scale ages with otolith ages decreased from small to large fish. Length-frequency analysis in conjunction with ages assessed by the three calcified structures showed that dorsal spines and scales underestimated white bass ages compared to the otoliths. Clarity of the otolith annuli, even of the older fish, makes them a reliable source for white bass age assessment.
Leaf Optical And Indirect Lai Measurements In Wheat And Alfalfa At Maciv: Agmet Progress Report 89-4, E. A. Walter-Shea, B. L. Blad
Leaf Optical And Indirect Lai Measurements In Wheat And Alfalfa At Maciv: Agmet Progress Report 89-4, E. A. Walter-Shea, B. L. Blad
School of Natural Resources: Documents and Reviews
Interpretation of remotely sensed vegetative surfaces requires an understanding of the interaction of radiation with the various components of vegetation. Leaves are the most important component. Thus it is important to know the optical properties of individual leaves as well as the amount and distribution of leaves making up the vegetative cover. The objectives of our study were 1) to characterize the reflectance from and transmittance through adaxial and abaxial surfaces of individual wheat and alfalfa leaves and 2) to compare the traditional, time-consuming, destructive method of estimating LAI (direct method) to a relatively quick, indirect estimate of LAI in …
Fisheries Management Paper No. 21 - Commercial Fishing Licensing In Western Australia., Fisheries Department Of Western Australia.
Fisheries Management Paper No. 21 - Commercial Fishing Licensing In Western Australia., Fisheries Department Of Western Australia.
Fisheries Management Papers
The purpose of this paper is to provide those in the fishing industry, as well as those planning to enter the industry, with a statement on the policies on boat licences, boat replacements and transfers, limited and restricted entry licences and licence splitting as they apply to the fisheries managed under the Western Australian Fisheries Act. The pearling industry, which is managed under another Act, is not included.
Siguen De Incógnito En El Amazonas Un Millón De Especies Vegetales Y Animales, Aldemaro Romero Jr.
Siguen De Incógnito En El Amazonas Un Millón De Especies Vegetales Y Animales, Aldemaro Romero Jr.
Publications and Research
No abstract provided.
Maine Nonpoint Source Pollution Assessment Report, Bureau Of Water Quality Control
Maine Nonpoint Source Pollution Assessment Report, Bureau Of Water Quality Control
Maine Collection
Maine Nonpoint Source Pollution Assessment Report
Prepared by the Maine Department of Environmental Protection, Bureau of Water Quality Control, Augusta, Maine 1989.
Contents: Executive Summary / Introduction / Methodology / Statewide Water Quality Summary / State And Local Agency Programs for Control of Nonpoint Source Pollution / Process for Identification of Best Management Practices and Associated Standards / List of References / List of Figures / List of Tables
Desert Explorations - A Videodisc Exhibit Designed For Flexibility, Judy Diamond, Alan B. Bond, Atsusi Hirumi
Desert Explorations - A Videodisc Exhibit Designed For Flexibility, Judy Diamond, Alan B. Bond, Atsusi Hirumi
Alan Bond Publications
Using an interactive exhibit does not provide the same experience for everyone. How visitors understand an exhibit, what associations it evokes, and even how it is physically utilized may differ widely. This article describes an exhibit that was designed to let visitors tailor their explorations to their own interests and motivation. The exhibit, called Desert Explorations, gives visitors choices of what to see and how to learn about what they see. This exhibit also is an example of a way of developing interactive videodisc exhibits that is relatively inexpensive yet may be tailored to a particular topic or hall. This …
Field Notes, Joseph A. Cook
Field Notes, Joseph A. Cook
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Survey And Reconnaissance Of Sea Turtles In The Northern Gulf Of Mexico, Larry Ogren
Survey And Reconnaissance Of Sea Turtles In The Northern Gulf Of Mexico, Larry Ogren
United States Department of Commerce: Staff Publications
This is a report on the results of an aerial survey of nesting beaches conducted during the period from May 16, 1977 to August 11, 1977. The area covered included the barrier beaches and offshore islands from the Florida-Alabama state line to the Rio Grande, Texas. Additional historical information is provided in order to compare current nesting activity with previous years as well as anecdotal observations on the occurrence of sea turtles in this region.
From The Gulf To The Rio Grande: Human Adaptation In Central, South, And Lower Pecos Texas, Thomas Hester, Stephen L. Black, D. Gentry Steele, Ben W. Olive, Anne A. Fox, Karl Reinhard, Leland C. Bement
From The Gulf To The Rio Grande: Human Adaptation In Central, South, And Lower Pecos Texas, Thomas Hester, Stephen L. Black, D. Gentry Steele, Ben W. Olive, Anne A. Fox, Karl Reinhard, Leland C. Bement
Karl Reinhard Publications
The South Texas area, Region 3 of the Southwestern Division, U.S. Army Corps of Engineers, is synthesized from archeological and bioarcheological perspectives. Three distinct geographic units within Region 3 are treated in detail: Central Texas Plateau Prairie, South Texas Plains, and Lower Pecos Canyonlands. More than 11,000 years of human adaptation are chronicled for this area, stretching from the Gulf of Mexico to the Rio Grande along the border with northeastern Mexico. Particular attention is devoted to a consideration of the region's prehistoric record; significant problems and data gaps are outlined. For the first time, a compilation has been done …
Field Notes, Jennifer K. Frey
Field Notes, Jennifer K. Frey
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Rock Lobster Industry Advisory Committee Report To The Minister For Fisheries., Rock Lobster Industry Advisory Committee
Rock Lobster Industry Advisory Committee Report To The Minister For Fisheries., Rock Lobster Industry Advisory Committee
Fisheries Management Papers
The total catch of about 12.1 million kilograms for the 1987/88 season, based on processor returns, was an increase of 44% on the 1986/87 season. This very high catch, the third highest on record, resulted from an above average perulus settlement in 1983/84 and a "flow-on" of fast growing animals stemming from the expected high recruitment in 1988/990 caught as "reds" in 1987/88.
The Committee has identified five major elements related to the state of the rock lobster fishery upon which management advice is considered.
a) The undersize fraction of the population.
b) The "whites" which provide a significant proportion …
Specimen Catalog, Forrest W. Davis
Specimen Catalog, Forrest W. Davis
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Field Notes, Forrest W. Davis
Field Notes, Forrest W. Davis
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Jennifer K. Frey
Specimen Catalog, Jennifer K. Frey
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Taxonomy Of Streptanthus Sect. Biennes, The Streptanthus Morrisonii Complex (Brassicaceae), Rebecca W. Dolan, Lawrence F. Lapre
Taxonomy Of Streptanthus Sect. Biennes, The Streptanthus Morrisonii Complex (Brassicaceae), Rebecca W. Dolan, Lawrence F. Lapre
Scholarship and Professional Work - LAS
The Streptanthus morrisonii complex is a six-taxon group of closely related serpentine rock outcrop endemics from Lake, Napa, and Sonoma counties of California, USA. Two new subspecies (S. morrisonii subsp. kruckebergii and S. brachiatus subsp. hoffmanii) from Lake County, California, are described. The relationship of these taxa to others in the section is reviewed and descriptions and a key are provided.
Nesting Dynamics Of The Eastern Bluebird (Sialia Sialis) In Southeastern Illinois, Susan E. Nelle
Nesting Dynamics Of The Eastern Bluebird (Sialia Sialis) In Southeastern Illinois, Susan E. Nelle
Masters Theses
Data collected from 1981 through 1988 from an Eastern Bluebird (Sialia sialis) nesting box trail, involving 512 nests and 2176 eggs, in Crawford County, Illinois, were analyzed and compared to similar published works. The average nesting season lasted 167.4 days, ran from 17 March through 31 August, and was divided into three breeding peaks (or phases). Most breeding pairs were observed with either one or two clutches per season; however, triple-brooded pairs were also present, the clutches of which coincided well with the three peaks. Most data showed a decrease as the season progressed. For example, mean clutch …
Some Factors Affecting Male Mating Success In The Giant Waterbug (Belostoma Flumineum Say), Karyn S. Crisman
Some Factors Affecting Male Mating Success In The Giant Waterbug (Belostoma Flumineum Say), Karyn S. Crisman
Masters Theses
Giant waterbugs (Subfamily Belostomatinae) are interesting in that males provide exclusive post-copulatory care of young. This unusual behavior makes this species an excellent study system for investigations of sexual selection theory because in such systems, sex role reversals are predicted. Previous studies indicate that role reversal in giant waterbugs is not complete because males still court females. It is assumed that from this courtship display females can assess male quality and "choose" a superior male. If some males are chosen over others then differential mating success results. This study was undertaken to ascertain some of the factors that affect male …
Dental Pathology In Selected Carnivores From Arkansas, C. Renn Tumlison, J. D. Wilhide, V. Rick Mcdaniel
Dental Pathology In Selected Carnivores From Arkansas, C. Renn Tumlison, J. D. Wilhide, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
The occurrence and kinds of dental pathology in wild carnivore populations in Arkansas were investigated through examination of 1295 skulls of bobcat (Felis rufus), river otter (Lutra canadensis), gray fox (Urocyon cinereoargenteus), coyote (Canis latrans), and raccoon (Procyon lotor). Pulpitis or abscesses in broken or otherwise exposed teeth were noted in all species, but bobcats had the fewest exposures while otter and gray foxhad the most. Osteomyelitis occurred in all species except the bobcat. Caries were noted in the coyote, raccoon, and gray fox. Otter and coyote had alveolar thinning, and coyote had enamel dysplasia and maxillary sinusitis.
Community Responses To Variable Predation: Field Studies With Sunfish And Freshwater Macroinvertebrates, Mark J. Butler Iv
Community Responses To Variable Predation: Field Studies With Sunfish And Freshwater Macroinvertebrates, Mark J. Butler Iv
Biological Sciences Faculty Publications
The impact of variable predation by bluegill sunfish on macroinvertebrate prey in a North Florida lake is examined. Variable predation may occur in many systems and may contribute substantially to the spatial heterogeneity, temporal inconstancy and species composition of prey communities.
Patchy, temporally variable predation characterized middepth and deep lake habitats, whereas in the shallow zone predation was relatively constant and homogeneous. Predation varied significantly every 2-4 wk in the mid-depth zone, but varied little between consecutive weeks or days. Caging experiments revealed that variable predation altered prey community composition and increased the mean size and size range of some …