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Articles 9271 - 9300 of 9843

Full-Text Articles in Physical Sciences and Mathematics

Maintaining Minimum Stream Flows For Wildlife And Recreation, A. Dan Tarlock Jun 1981

Maintaining Minimum Stream Flows For Wildlife And Recreation, A. Dan Tarlock

Water Resources Allocation: Laws and Emerging Issues: A Short Course (Summer Conference, June 8-11)

27 pages.

Contains references.


Federal Nonreserved Water Rights, Frank J. Trelease Jun 1981

Federal Nonreserved Water Rights, Frank J. Trelease

Water Resources Allocation: Laws and Emerging Issues: A Short Course (Summer Conference, June 8-11)

5 pages.


Federal Regulation Of Appropriations Of Water In The Name Of Protecting Water Quality, David L. Harrison Jun 1981

Federal Regulation Of Appropriations Of Water In The Name Of Protecting Water Quality, David L. Harrison

Water Resources Allocation: Laws and Emerging Issues: A Short Course (Summer Conference, June 8-11)

9 pages.


Federal Reserved Water Rights Policy And Improving Federal-State Relations In The West: A Discussion Of The Need For Federal Legislation On Reserved Rights: Outline, Charles B. Roe, Jr. Jun 1981

Federal Reserved Water Rights Policy And Improving Federal-State Relations In The West: A Discussion Of The Need For Federal Legislation On Reserved Rights: Outline, Charles B. Roe, Jr.

Water Resources Allocation: Laws and Emerging Issues: A Short Course (Summer Conference, June 8-11)

8 pages.


Pure Water, Pure Law, And Pure Nonsense: Outline, Charles E. Corker Jun 1981

Pure Water, Pure Law, And Pure Nonsense: Outline, Charles E. Corker

Water Resources Allocation: Laws and Emerging Issues: A Short Course (Summer Conference, June 8-11)

24 pages.


Water Resources Allocation: Reclaiming Municipal Wastewater For Agricultural Use: Outline, Robert C. Kerr Jun 1981

Water Resources Allocation: Reclaiming Municipal Wastewater For Agricultural Use: Outline, Robert C. Kerr

Water Resources Allocation: Laws and Emerging Issues: A Short Course (Summer Conference, June 8-11)

26 pages (includes illustrations).


Chemical And Biological Structure Of Lake Mead Sediments, Richard T. Prentki, Larry J. Paulson, John R. Baker Jun 1981

Chemical And Biological Structure Of Lake Mead Sediments, Richard T. Prentki, Larry J. Paulson, John R. Baker

Publications (WR)

Lake Mead has undergone a serious decline since Glen Canyon Dam was constructed 450 km upstream in 1963.

State fisheries management agencies are concerned that the decline was caused by water level fluctuations and more severe drawdowns during the bass spawning season, when the operation of Hoover Dam was altered during the post-Lake Powell period.

The construction of Glen Canyon Dam and formation of Lake Powell in 1963 drastically altered the natural discharge and temperature cycles and decreased suspended sediment and nutrient loading in the Colorado River inflow to Lake Mead. Recent studies indicate that these changes in nutrient loading …


The Prairie Naturalist Volume 13, Number 2. June 1981 Jun 1981

The Prairie Naturalist Volume 13, Number 2. June 1981

The Prairie Naturalist

HERPETOFAUNA OF MORMON ISLAND PRESERVE, HALL COUNTY, NEBRASKA ▪ S. M. Jones, R. E. Ballinger and J. W Nietfeldt

COYOTE USE OF PLAYAS IN THE TEXAS HIGH PLAINS ▪ R. W. Whiteside and F. S. Guthery

NEW RECORD OF THE LEAST WEASEL IN WYOMING ▪ M. R. Stromberg, D. E. Biggens and M. Bidwell

STATUS OF AMERICAN WOODCOCK IN NEBRASKA WITH NOTES ON A RECENT BREEDING RECORD ▪ G. R. Lingle

WINTER FOODS OF THE PINE GROSBEAK IN EASTERN NORTH DAKOTA ▪ R. C. Reigh

SEASONAL VARIATION IN HOME RANGE OF A FEMALE BADGER (Taxidea taxus) ▪ R. …


John Muir Newsletter, May/June 1981, Holt-Atherton Pacific Center For Western Studies May 1981

John Muir Newsletter, May/June 1981, Holt-Atherton Pacific Center For Western Studies

Muir Center Newsletters (1981-2015)

Holt-Atherton Pacific Center for Western Studies University of the Pacific Stockton, Calif 95211 VOLUME 1 MAY/JUNE 1981 NUMBER 3 EDITORIAL STAFF: RONALD H LIMBAUGH. JANICE D MAGDICH STATUS OF MUIR PROJECT FUNDING After a long, drawn-out struggle to reauthorize funding for the National Historical Publications and Records Commission, the latest news from Capitol Hill is encouraging. Although the House version of the reauthorization bill was defeated early in May, on June 2 the Senate version (S. 1050) was approved on the consent calendar and now comes before the House with the backing of the Senate Republican leadership S. 1050 provides …


Elm Trees And Elm Leaf Beetles: Patterns Of Herbivory, Cliff A. Lemen Apr 1981

Elm Trees And Elm Leaf Beetles: Patterns Of Herbivory, Cliff A. Lemen

School of Natural Resources: Faculty Publications

The rate of attack on elm seedlings by the Elm Leaf Beetle is affected by the seedlings position relative to adult elms. Those seedlings directly under adult trees suffer 580 times the insect attack from the beetles as seedlings not directly under adult elms. Excluding seedlings under adult elms, the number of egg masses found on an elm plant is directly proportional to its size. It was found that below a certain size seedlings were completely free from beetle attack.


A Comparison Of Reproductive Strategies Among Marine Snakes, Cliff A. Lemen, Harold K. Voris Apr 1981

A Comparison Of Reproductive Strategies Among Marine Snakes, Cliff A. Lemen, Harold K. Voris

School of Natural Resources: Faculty Publications

(1) Gravid females representing fourteen species of marine snakes were collected from four localities along the coast of Malaysia in 1975. The average clutch size ranged from 2.9 to 17.8 but most species had between three and seven young. The number of young produced and the size of gravid Lapemis hardwickii differed significantly at two sites in the Straits of Malacca. Eight species showed a significantly positive relationship between the number of oviducal eggs and female weight. The rate of infertility among ten species ranged from 4.5 to 20%.

(2) Sex ratios in the collections varied significantly through time and …


Maine's Whitewater Rapids And Their Relevance To The Critical Areas Program, Janet Mcmahon Apr 1981

Maine's Whitewater Rapids And Their Relevance To The Critical Areas Program, Janet Mcmahon

Maine Collection

Maine's Whitewater Rapids and Their Relevance to the Critical Areas Program

by Janet McMahon

Planning Report No. 74, Critical Areas Program, 184 State St., Augusta, Maine,

April, 1981 (additions made in October, 1981). Reprinted July, 1983.

Contents: Introduction / Natural History of Whitewater Rapids / Methods / Criteria / Results / Conclusions / General Evaluation of Whitewater Rapids for Inclusion on the Register of Critical Areas / Bibliography / Action Plan


John Muir Newsletter, March/April 1981, Holt-Atherton Pacific Center For Western Studies Mar 1981

John Muir Newsletter, March/April 1981, Holt-Atherton Pacific Center For Western Studies

Muir Center Newsletters (1981-2015)

Holt-Atherton Pacific Center \\/ / University of the Pacific for Western Studies \ / Stockton, Calif 95211 VOLUME 1 MARCH/APRIL 1981 NUMBER 2 EDITORIAL STAFF: RONALD H. LIMBAUGH. JANICE D. MAGDICH PROJECT FUNDING IN JEOPARDY On February 24, the Muir Project staff received a letter from Frank G. Burke, NHPRC (National Historical Publications and Records Commission) Executive Director, alerting all Grant Recipients that the Reagan Administration's budget recommendation to Congress eliminates all NHPRC grant funding after September 30, 1981. Congressional action on this recommendation is still pending, but Director Burke warns project directors to "begin planning for the cessation of …


The Prairie Naturalist Volume 13, Number 1. March 1981 Mar 1981

The Prairie Naturalist Volume 13, Number 1. March 1981

The Prairie Naturalist

EDITOR: Dr. Paul B. Kannowski

BOOK REVIEW EDITOR: Douglas H. Johnson

TABLE OF CONTENTS

WATERFOWL USE OF A MUNICIPAL SEWAGE LAGOON ▪ G-A. D. Maxson

MASS MORTALITY OF MUSSELS FROM SLUMPING ALONG THE RED LAKE RIVER NEAR CROOKSTON, MINNESOTA ▪ A. M. Cvancara, D. J. Brown, D. K. Cudworth, and T. R. Klett

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA — 1980 ▪ R. N. Randall

BREEDING BIRDS ON WATERFOWL PRODUCTION AREAS IN NORTHEASTERN NORTH DAKOTA ▪ H. F. Duebbert

FURTHER EVIDENCE OF MARSH HAWKS FEEDING ON DUCKS ▪ R. A. Wishert, R. M. Kaminski, and D. W. Soprovich

FIRST NEST …


Influence Of Windbreak-Shelter On Soybean Production Under Rainfed Conditions, S.N. Ogbuehi, James R. Brandle Jan 1981

Influence Of Windbreak-Shelter On Soybean Production Under Rainfed Conditions, S.N. Ogbuehi, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


Influence Of Windbreak-Shelter On Soybean Production Under Rainfed Conditions, S.N. Ogbuehi, James R. Brandle Jan 1981

Influence Of Windbreak-Shelter On Soybean Production Under Rainfed Conditions, S.N. Ogbuehi, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


Forestry For Wildlife Habitat Improvement. Nebraska Cooperative Extension Service Ec 81-1747, Ec 80-1747, Frank A. Hershey, Howard L. Wiegers Jan 1981

Forestry For Wildlife Habitat Improvement. Nebraska Cooperative Extension Service Ec 81-1747, Ec 80-1747, Frank A. Hershey, Howard L. Wiegers

School of Natural Resources: Faculty Publications

Wildlife cannot exist without food and protective cover. Natural and planted woodlands contribute significantly to these essentials. This circular describes habitat needs of wildlife, recommends forestry practices for habitat improvement, and gives examples of practices to improve habitat for pheasant, quail, and deer.

Variety, rather than uniformity of vegetation, benefits most wildlife species. Management which results in a diverse plant community with many stages of growth can increase the numbers and species of wildlife. Techniques which create improved conditions for woodland wildlife are fundamentally the same as those designed to grow good timber.


Plant And Air Temperatures In Differentially-Irrigated Corn, B. L. Blad Jan 1981

Plant And Air Temperatures In Differentially-Irrigated Corn, B. L. Blad

School of Natural Resources: Faculty Publications

No abstract provided.


Mass And Energy Exchanges Of A Soybean Canopy Under Various Environmental Regimes, S. B. Verma Jan 1981

Mass And Energy Exchanges Of A Soybean Canopy Under Various Environmental Regimes, S. B. Verma

School of Natural Resources: Faculty Publications

No abstract provided.


John Muir Newsletter, January/February 1981, Holt-Atherton Pacific Center For Western Studies Jan 1981

John Muir Newsletter, January/February 1981, Holt-Atherton Pacific Center For Western Studies

Muir Center Newsletters (1981-2015)

JOHN MUIR NEWSLETTER JL January-February 1981 An irregular publication of the Holt-Atherton Pacific Center for Western Studies, University of the Pacific, Stockton, California 95211 Editorial Staff: Ronald H. Limbaugh, Janice D. Magdich WANTED: NEWSLETTER ITEMS. This modest publication is designed to provide a clearinghouse for information and news of interest to Muir scholars and friends. You can help by sending newsworthy items to the editorial staff. Our space is very limited, so make it brief and camera ready if possible. The staff reserves the right to review and edit all material submitted. WANTED: COMMENTATORS AND REVIEWERS. If you are interested …


An Energy Education Teaching Unit For The Fifth Grade, Lynn A. Thompson Jan 1981

An Energy Education Teaching Unit For The Fifth Grade, Lynn A. Thompson

Theses Digitization Project

No abstract provided.


Report No 41 - A Survey Method For Identifying Roadside Flora Suitable For Conservation In Western Australia, John K. Scott Jan 1981

Report No 41 - A Survey Method For Identifying Roadside Flora Suitable For Conservation In Western Australia, John K. Scott

Fisheries Research Reports

A survey method for identifying flora suitable for conservation alongside roads in south-western Australia was derived from an examination of characteristics of road verges. Two roads, from Midland to Toodyay and from Armadale to Bunbury, were examined. Width of verge, weed cover, soil disturbance, vegetation structure, presence of public utilities, evidence of fire and the type of adjoining land were measured at one mile (1.6 km) intervals on both sides of the road. Also recorded were aesthetic qualities such as stands of beautiful trees and sites of special interest, e.g. the presence of rare plants.

Three variables, percentage weed cover, …


Fisheries Report No 48 - The Western Rock Lobster Fishery 1976 - 1977, G. R. Morgan, E H. Barker Jan 1981

Fisheries Report No 48 - The Western Rock Lobster Fishery 1976 - 1977, G. R. Morgan, E H. Barker

Fisheries Research Reports

The fishery for the western rock lobster Panuldinus cygnus is one of the most important single fisheries in Australia and an important export earner for the State. The fishery is governed by a complex set of regulations which have been reviewed by Bowen (1971) and which are designed to limit the total effort to acceptable levels and to enforce a legal minimum size. It is thus important to constantly monitor the state of the fishery both to ensure that the effort is remaining within the accepted limits and that the regulations are adequately performing their function of maintaining reasonably stable …


Fisheries Report No 43 - A Pit Trap Survey Of Small Mammals, Lizards And Frogs On The Two Peoples Bay Nature Reserve, Stephen D. Hopper Jan 1981

Fisheries Report No 43 - A Pit Trap Survey Of Small Mammals, Lizards And Frogs On The Two Peoples Bay Nature Reserve, Stephen D. Hopper

Fisheries Research Reports

Ten pitlines were placed in open low woodlands near Moates Lake and in upland and coastal heathlands near Mount Gardner on Two Peoples Bay Nature Reserve during February 1980 and February 1981. The trapping program established that Common Dunnarts (Smitnthopsts murina) and Honey Possums (Tarstpes spencerae) were widespread in the reserve, and added three lizards and one frog to the list of vertebrates known to occur on the reserve.

Twenty mammals (15 native and 5 feral), four snakes, fifteen lizards, one tortoise and six frogs are now known on Iwo Peoples Bay Nature Reserve. They constitute a representative sample of …


Is Nature Our Birthright?, Nancy Heneson Jan 1981

Is Nature Our Birthright?, Nancy Heneson

Ecology Collection

It is of course impossible to escape the notion of self-interest in our relationship with nature. In fact, it is "unnatural," if one understands (and, one is forced to say nowadays, believes in) evolution. However, there is no real justification for either disguising this as stewardship or perverting it into dominionism. Every organism has an impact on the environment, and it is not only idealistic but biologically nonsensical to argue that we should leave everything alone. However, when decisions on policy are made which direct the future use of land, plants and animals, at least let the rationale not be …


Report No 42 - A Guide To The Gazetted Rare Flora Of Western Australia, Barbara L. Rye, Stephen D. Hopper Jan 1981

Report No 42 - A Guide To The Gazetted Rare Flora Of Western Australia, Barbara L. Rye, Stephen D. Hopper

Fisheries Research Reports

Descriptions and illustrations are provided for the first 100 taxa which have been gazetted as rare, likely to become extinct or in need of special protection under the Wildlife Conservation Act 1950-1979. Most of these rare taxa are restricted to the South-West Botanical Province and more than one-third occur in the Albany Wildlife District.

An outline is given of the means adopted to determine which taxa are gazetted as rare, the legal provisions for their protection and the biological data being sought for their management.


Fisheries Report No 46 - The Amateur Fishery For The Western Rock Lobster, Pamela N. Norton Jan 1981

Fisheries Report No 46 - The Amateur Fishery For The Western Rock Lobster, Pamela N. Norton

Fisheries Research Reports

A study of the amateur fishery for the western rock Lobster, Paulinus cygnus George, was commenced by the W.A. Marine Research Laboratories in August, 1976, and was concluded in December, 1978. The main aims of this study were to collect and analyse data to give some estimate of the distribution and magnitude of this amateur fishery.

Prior to this survey, the only catch and fishing effort data available was that obtained from the commercial fishery. Data from the amateur fishery were required in order to make a full assessment of the Level of exploitation of the stocks. In addition, 144 …


Fisheries Report No 45 - The Short Term Effects Of Brush Harvesting On The Kwongan Vegetation At Eneabba, Western Australia, E. A. Griffin, A. J. M. Hopkins Jan 1981

Fisheries Report No 45 - The Short Term Effects Of Brush Harvesting On The Kwongan Vegetation At Eneabba, Western Australia, E. A. Griffin, A. J. M. Hopkins

Fisheries Research Reports

Areas of the kwongan vegetation south of Eneabba are currently being harvested to provide brush for rehabilitation after mining. Because of the botanical importance of the Eneabba kwongan, a study of the effects of the harvesting was initiated. Three areas with different harvest histories were sampled using quadrats paired across cut/uncut boundaries. Floristic and structural differences between quadrats and between areas were assessed. The store of seed in uncut vegetation was measured.

There was a loss of species as a result of harvesting, at least in the short-term. Many species regenerated by resprouting from buds in damaged stems or in …


Limitations In The Use Of Leaf Dry Weight And Leaf Number For Predicting Leaf Area Of Soybeans, S.N. Ogbuehi, J.R. Brandle Jan 1981

Limitations In The Use Of Leaf Dry Weight And Leaf Number For Predicting Leaf Area Of Soybeans, S.N. Ogbuehi, J.R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.


Windbreaks In The Wheatbelt, D J. Carter Jan 1981

Windbreaks In The Wheatbelt, D J. Carter

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

No abstract provided.