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Articles 8581 - 8610 of 9401
Full-Text Articles in Entire DC Network
The Role Of Gradualism And Punctuation In Cave Adaptation, David C. Culver
The Role Of Gradualism And Punctuation In Cave Adaptation, David C. Culver
International Journal of Speleology
The theory of punctuated equilibrium, offers a potential explanation for the profound morphological changes that accompany isolation in caves. I consider three aspects of punctuation theory: the association of morphological change with speciation; periods of stasis; and the number of genes controlling a trait. If the evolution of cave organisms is associated with speciation, then speciose groups and cave species derived from other cave-limited species should show increased adaptation. Analysis of Kane and Barr’s data on the subspecies of Neaphaenops tellkampfi and Holsinger’s data on crangonyctid amphipods fails to provide any support for the hypothesis. If the evolution is characterized …
Food-Finding Ability In Cave Fish (Astyanax Fasciatus), Kathrin Hüppop
Food-Finding Ability In Cave Fish (Astyanax Fasciatus), Kathrin Hüppop
International Journal of Speleology
When competing under cave similar conditions, such as darkness and food scarcity, cave fish find much more food than their epigean relatives. The cave fish not only react much faster to food but also their food-finding ability is four times higher compared to that of the epigean fish. Several morphological and ethological alterations in the cave fish, described by other authors, seem to be responsible for this adaptation to the cave conditions.
Field Peas In The Wheatbelt, R J. French
Field Peas In The Wheatbelt, R J. French
Journal of the Department of Agriculture, Western Australia, Series 4
Plantings of lupins in the Western Australian wheatbelt increased rapidly in the late 1970s and early 980s as improved varieties became available and farmers realised the benefits to be gained from growing grain legumes. Grain legumes are useful not simply as alternative cash crops. They provide 'fixed' atmospheric nitrogewn to following cereal crops and act as a cleaning crop to break cereal disease cycles. They are also valuable sheep feed.
In 1975, throughout the wheatbelt, the Department of Agriculture began a comparison of several alternative legumes. The crops included field peas, faba beans, chickpeas, lentills and various vetches. Field peas …
Coral Reef To Eolianite Transition In The Pleistocene Rocks Of Great Inagua, Bahamas, Brian White, H. Allen Curran
Coral Reef To Eolianite Transition In The Pleistocene Rocks Of Great Inagua, Bahamas, Brian White, H. Allen Curran
Geosciences: Faculty Publications
Great Inagua Island, the southernmost of the chain of Bahamian islands, lies approximately 100 km northeast of the eastern tip of Cuba. This paper reports the results of reconnaissance geologic field work conducted on Great Inagua Island in January, 1985, and of more detailed observations made in January, 1986, near Matthew Town, between South West Point and Devil's Point.
Pasture Agronomy Branch, Pasture Growth Rates., P Booth
Pasture Agronomy Branch, Pasture Growth Rates., P Booth
Experimental Summaries - Plant Research
Location: Shire of Augusta-Margaret River, Shire of Elgin and Shire of Bridgetown-Greenbushes.
To quantify and identify insect and fungal losses of annual pasture production caused through seedling mortality and early production losses. Three sites in the Margaret River/Augusta Shire, one in the Elgin Shire and one in the Bridgetown Shire were used.
Crop Agronomy., S. Porritt
Crop Agronomy., S. Porritt
Experimental Summaries - Plant Research
Seeding machinery for stubble retention in lupin cereal rotations, 85LG21, and 85LG22. Dynamic Lifter (cereal mix) fertiliser evaluation, 86LG2. Cultural systems for lupin: wheat rotations on water repellent soils, 87ES2. Stubble retention and Rovral for brownspot control in lupins, 87M66. Straw length Effects on wheat growth on red-brown earths, 87M70. Row spacing and stubble retention effects on wheat growth on red-brown earths, 87M71. Nitrogen fertiliser for wheat production after volunteer pasture or sub clover-based pasture, 87ME73 and 87ME74. Effect of seeding rate and sowing depth on lupin establishment, 87ME75. Time of seeding various wheat varieties, 87WE76.
Lungfish Burrows In The Upper Triassic Chinle And Dolores Formations, Colorado Plateau, Russell F. Dubiel, Robert H. Blodgett, Thomas M. Bown
Lungfish Burrows In The Upper Triassic Chinle And Dolores Formations, Colorado Plateau, Russell F. Dubiel, Robert H. Blodgett, Thomas M. Bown
United States Geological Survey: Staff Publications
Vertical-to-inclined, cylindrical trace fossils that occur in the Upper Triassic Chinle and Dolores Formations on the Colorado Plateau are interpreted to be the casts of lungfish burrows. The casts, which are as much as 11 cm in diameter and as much as 1.6 m long, were formed by passive siliciclastic and carbonate sedimentation into apparently abandoned lungfish burrows. Locally, the burrow fillings are overwhelmingly abundant, and many intersect and have destroyed former burrow fillings. Superposition of bioturbation episodes has obliterated most primary sedimentary structures. This bioturbation has contributed to the mottled coloration and the knobby-weathering texture of the rocks. The …
Patterns Of Dental Evolution In Early Eocene Anaptomorphine Primates (Omomyidae) From The Bighorn Basin, Wyoming, Thomas M. Bown, Kenneth D. Rose
Patterns Of Dental Evolution In Early Eocene Anaptomorphine Primates (Omomyidae) From The Bighorn Basin, Wyoming, Thomas M. Bown, Kenneth D. Rose
United States Geological Survey: Staff Publications
ABSTRACT--The subfamily Anaptomorphinae contains the oldest and most generalized members of the tarsier-like primates and is the basal group of the extinct family Omomyidae. The best and most continuous record of anaptomorphine history is from rocks of early Eocene (Wasatchian) age in the Bighorn Basin of northwest Wyoming where eight genera and 14 species are recognized. Three of these species are new (Teilhardina crassidens, Tetonius matthewi, Absarokius metoecus), and four other new species are described from elsewhere (Tetonius mckennai, Absarokius gazini, A. australis, Strigorhysis huerfanensis). Teilhardina tenuicula and Absarokius nocerai are …
History Of Cultural Eutrophication At Lake Manitou, Indiana And Prospects For Its Management, Thomas Crisman
History Of Cultural Eutrophication At Lake Manitou, Indiana And Prospects For Its Management, Thomas Crisman
School of Geosciences Faculty and Staff Publications
No abstract provided.
A Hydrogeologic Investigation Of The Balkema Wetland, Daniel V. Fronczek
A Hydrogeologic Investigation Of The Balkema Wetland, Daniel V. Fronczek
Masters Theses
The Balkema wetland, located In southwestern Kalamazoo County, Michigan, represents complex biological and hydrologic Interaction between surface water and a two-aquifer hydrologic system. Situated on the southeastern flank of the Kalamazoo moraine, the glacial geology of the area plays a key role in the understanding of the hydrogeologic function of the wetland. A two-aquifer system, an upper unconfined, and a lower confined, Interact In the vicin ity of the wetland where the c la y /till aqulclude dividing the two systems 1s absent. Various parameters, both hydrologic and geochemical, were measured In the study area, Including specific conductance values of …
Late Pleistocene Sciurids From Kokoweef Cave, H. Thomas Goodwin
Late Pleistocene Sciurids From Kokoweef Cave, H. Thomas Goodwin
Loma Linda University Electronic Theses, Dissertations & Projects
Three local (Tamias panamintinus, Ammospermophilus leucurus and Spermophilus variegatus) and five extralocal (Tamias minimus, Tamias palmeri, Marmota flaviventris, Spermophilus townsendii, and Spermophilus lateralis) sciurid species (Sciuridae) were identified from the late Pleistocene-early Holocene Kokoweef Cave paleofauna. This fauna was the first documentation of T. minimus, T. palmeri and S. townsendii from the Pleistocene of the Mohave Desert. The 30-ft sedimentary sequence apparently recorded the mid-to late-Wisconsian introduction of S. lateralis into the Kokweef fauna but otherwise documented general taxonomic stability. The ecological diversity of the fauna was consistent with--but did not require--the hypothesis of more equable late Pleistocene climates, and …
Slack-Water Deposits And The Magnitude And Frequency Of Flash Floods, Eastern Kentucky, Russell G. Shepherd, Lisa K. Bienkowski
Slack-Water Deposits And The Magnitude And Frequency Of Flash Floods, Eastern Kentucky, Russell G. Shepherd, Lisa K. Bienkowski
KWRRI Research Reports
The potential for predicting flood magnitude and frequency using sediments deposited in backwater areas during flash floods was investigated on the Cumberland Plateau of eastern Kentucky, a region n9torious for flash flooding. Slack-water deposits are abundant in the area at tributary mouths and bedrock channel expansions. They are identifiable on geologic quandrangle maps, and are locally good potential indicators of maximum flood-crest elevations. However, in this humid region, flash floods could not be distinguished from non-flash floods using slack-water sedimentology.
The results from the slack-water deposits studied indicate that they offer limited potential for predicting flash floods because 1) intense …
The National Park System And Development On Private Lands: Opportunities And Tools To Protect Park Resources, Michael Mantell
The National Park System And Development On Private Lands: Opportunities And Tools To Protect Park Resources, Michael Mantell
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
34 pages.
Contains footnotes.
Jurisdictional And Institutional Issues: Public Lands, Robert B. Keiter
Jurisdictional And Institutional Issues: Public Lands, Robert B. Keiter
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
13 pages.
Contains references.
International Law And External Threats To National Parks, Daniel Barstow Magraw
International Law And External Threats To National Parks, Daniel Barstow Magraw
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
41 pages.
Contains references.
A Simple Solution For The Thorny Problem Of Park Protection: Focusing On Alternatives, David Mastbaum
A Simple Solution For The Thorny Problem Of Park Protection: Focusing On Alternatives, David Mastbaum
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
116 pages (includes illustrations).
Contains footnotes and references.
Contains 3 attachments:
1) Article titled, "No Park Is an Island: A Simple Solution for the Thorny Problem of Park Protection," by David Mastbaum, from Resource Law Notes, Natural Resources Law Center.
2) Paper titled, "National Park Service War Work: December 7, 1941 to June 30, 1944" prepared by National Park Service.
3) Paper titled, "An Alternative to the Allen-Warner Valley Energy System: A Technical and Economic Analysis," by The Environmental Defense Fund, July 1980.
Panel: “Protecting Our National Parks: What Should Be Done,” And William J. Lockhart, Outline: Problems And Issues That Must Be Addressed; And Some Preliminary Proposals For Solutions, William J. Lockhart
Panel: “Protecting Our National Parks: What Should Be Done,” And William J. Lockhart, Outline: Problems And Issues That Must Be Addressed; And Some Preliminary Proposals For Solutions, William J. Lockhart
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
26 pages.
Statements On Introduced Bills And Joint Resolutions [The Congressional Record, Senate Vol. 132, February 25, 1986, S1561-S1564], John Chafee
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
Presenter: Robert F. Hurley, Administrative Assistant to Senator John H. Chafee.
5 pages.
Pollution In Parks: A Publication Of The National Park Service, Richard H. Briceland
Pollution In Parks: A Publication Of The National Park Service, Richard H. Briceland
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
28 pages (includes illustrations).
Contains references.
Protection Of Waters Within And Without Park Boundaries To Support National Parks And Other Units Of The National Park System, A. Dan Tarlock
Protection Of Waters Within And Without Park Boundaries To Support National Parks And Other Units Of The National Park System, A. Dan Tarlock
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
8 pages.
Siting Industrial Facilities In The Western United States, Joseph Browder
Siting Industrial Facilities In The Western United States, Joseph Browder
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
24 pages.
Contains references.
External Development: Turning Problems Into Opportunities, T. Destry Jarvis
External Development: Turning Problems Into Opportunities, T. Destry Jarvis
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
9 pages.
The National Park Idea: Historical Misconceptions And Ecological Realities, Alfred Runte
The National Park Idea: Historical Misconceptions And Ecological Realities, Alfred Runte
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
17 pages.
Contains references.
Panel: Perspectives On External Threats To The National Parks [Report Of The Subgroup Of The Park Protection Working Group], Stephen A. Gleason
Panel: Perspectives On External Threats To The National Parks [Report Of The Subgroup Of The Park Protection Working Group], Stephen A. Gleason
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
11 pages.
Contains 1 attachment.
Restoring The Biological Integrity Of Everglades National Park, Estus D. Whitfield
Restoring The Biological Integrity Of Everglades National Park, Estus D. Whitfield
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
29 pages.
Contains references.
Case Study: The Challenges Of The Greater Yellowstone, Bill Bryan
Case Study: The Challenges Of The Greater Yellowstone, Bill Bryan
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
4 pages.
Legal Issues Associated With Protecting Park Resources: Air Quality And Related Values, Molly N. Ross
Legal Issues Associated With Protecting Park Resources: Air Quality And Related Values, Molly N. Ross
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
109 pages.
Contains references.
Contains 5 attachments:
1) United States Department of the Interior Memorandum, September 20, 1985: Protection of National Park System Units from the Adverse Effects of Air Pollution.
2) Library of Congress Congressional Research Service Memorandum, November 19, 1985: Comments on Department of the Interior Memorandum of September 20, 1985 Entitled "Protection of National Park System Units from the Adverse Effects of Air Pollution."
3) United States Department of the Interior Memorandum, May 15, 1986: Legal Authority of the Secretary to Protect the Air Quality and Related Values of NPS Units from Adverse Impacts of Surface Coal …
Protecting National Park Resources: Wildlife, George Cameron Coggins
Protecting National Park Resources: Wildlife, George Cameron Coggins
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
28 pages.
Contains references.
Agenda: External Development Affecting The National Parks: Preserving "The Best Idea We Ever Had", University Of Colorado Boulder. Natural Resources Law Center
Agenda: External Development Affecting The National Parks: Preserving "The Best Idea We Ever Had", University Of Colorado Boulder. Natural Resources Law Center
External Development Affecting the National Parks: Preserving "The Best Idea We Ever Had" (September 14-16)
Conference organizers and/or faculty included University of Colorado School of Law professors Lawrence J. MacDonnell and Daniel Magraw.
The conference will be held at the Aspen Lodge, adjacent to Rocky Mountain National Park near Estes Park, Colorado.
It was Wallace Stegner who called the national parks "the best idea we ever had." The continuing increases in usage attest to their popularity. National parks are created to preserve areas of special scenic and cultural value for enjoyment and use. Managing the parks in a manner that protects the important values and purposes for which they were created presents important and difficult …
Kununurra Region - Land Utilization Report - 1984 Dry Season - 1984/85 Wet Season And 1985 Dry Season In The Ord River Irrigation Area, S. Sandover
Natural resources published reports
Kununurra Region
3rd edition
A small experimental farm was first established on the Ord River in 1941. This farm was relocated in 1945 to what is now known as the Frank Wise Institute of Tropical Agriculture.
The first stage of the Irrigation Scheme which included the Diversion dam was completed by 1963 and by 1966, 31 irrigated farms had been established.
In 1967 the second stage was commenced and by 1972 the main dam had been completed.
Cotton was the major crop until 1974. In the wet season of that year 3642 hectares was devoted to cotton. Various crops such …