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Articles 11941 - 11970 of 12143
Full-Text Articles in Life Sciences
Control Of Water Resources In W.A, T C. Calder
Control Of Water Resources In W.A, T C. Calder
Journal of the Department of Agriculture, Western Australia, Series 4
Use of underground and surface water is controlled so that the supplies are available to the general benefit of all domestic, industrial and agricultural users in a particular area.
Water is a valuable resource and its contamination and wastage must be avoided. This article outlines the provisions of the Rights in Water Act which is designed to protect water supplies from undue exploitation, contamination and wastage.
Irrigation In South-Western Australia, K S. Cole
Irrigation In South-Western Australia, K S. Cole
Journal of the Department of Agriculture, Western Australia, Series 4
THE pattern of irrigation in South-Western Australia is constantly changing, At present, the main increase is in the private sector.
In the past century, there has been a see-saw effect from private to Government to private schemes.
The Prairie Naturalist Volume 2, Nos. 3 And 4 September–December, 1970
The Prairie Naturalist Volume 2, Nos. 3 And 4 September–December, 1970
The Prairie Naturalist
EDITORIAL: Ecology and Environmental Education ▪ Keith R. Stamm
PEOPLE IN PERIL ▪ Thomas L. Kimball
MEN IN MAN'S ENVIRONMENT ▪ Robert L. Burgess
ENERGY AND MAN'S ENVIRONMENT ▪ Dale Henegar
MINERALS AND SOILS IN MAN'S ENVIRONMENT ▪ Wilson M. Laird
WATER IN MAN'S ENVIRONMENT ▪ Norman Peterson
THE ATMOSPHERE IN MAN'S ENVIRONMENT ▪ Gene A. Christianson
WHY ENVIRONMENTAL EDUCATION IN THE LIFE SCIENCES? ▪ James R. Reilly
ECOLOGICAL EDUCATION IN THE PHYSICAL SCIENCES ▪ William P. Eastwood
MASS MEDIA AND ENVIRONMENTAL EDUCATION ▪ Richard Palmer
THE JUDGMENT OF THE JACKAL ▪ C. Benson Thomerson
THE ROLE OF COLLEGES AND …
The Prairie Naturalist Volume 2, No.2 June, 1970
The Prairie Naturalist Volume 2, No.2 June, 1970
The Prairie Naturalist
EDITORIAL: Ecocide on the Sheyenne? ▪ Paul B. Kannowski
NEW RECORDS OF VASCULAR PLANTS IN NORTH DAKOTA ▪ Robert E. Stewart
SOME LOCAL NATIVE PLANT LOSSES AND SOME SAL V AGE ▪ O. A. Stevens
CHRISTMAS BIRD COUNTS IN NORTH DAKOTA ▪ Robert N. Randall
ENVIRONMENTAL DESIGN IN COMMUNITY PLANNING ▪ Cameron Man
DISTRIBUTION OF THE SCIRPUS VALIDUS COMPLEX IN NORTH DAKOTA ▪ Richard L. Ward
Drift Of Oligophlebodes Sigma And Baetis Bicaudatus In A Mountain Stream, William Dean Pearson
Drift Of Oligophlebodes Sigma And Baetis Bicaudatus In A Mountain Stream, William Dean Pearson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objective of this study was to clarify the relationships between drift rates, population density, production rates, key environmental factors, and movements of adults within two populations of stream insects (a caddisfly--Oligophlebodes sigma and a mayfly--Baetis bicaudatus).
Samples of benthic invertebrates (424 total) were collected every 28 days at four stations on Temple Fork of the Logan River, Utah, from October, 1967 to September, 1969. Samples of drift invertebrates (181 total) were collected every 14 days at three stations on Temple Fork during the same period. During summer months (June-September) a day and a night drift sample …
Evaluation Of Molting Areas Of Great Basin Canada Geese, Paul D. Arneson
Evaluation Of Molting Areas Of Great Basin Canada Geese, Paul D. Arneson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Environmental factors at Neponset and Woodruff Narrows reservoirs were evaluated to determine their effects on molting Canada geese. More geese utilized Woodruff Narrows. Geese apparently favored the larger expanse of open water and adequate food supply.
Most of the molting geese were from the Bear River drainage. Some geese came from scattered areas in Utah, Idaho, Wyoming, and Montana. After molting, the geese flew to migration staging areas in southeastern Idaho before migrating to wintering areas in southern California and Arizona.
Females outnumbered males by 6 percent. The mean annual mortality rate for adult geese was 42 percent. Recovery rates …
Ecological Planning Workshop Poster April, 1970, Ian Mcharg, Risd Archives
Ecological Planning Workshop Poster April, 1970, Ian Mcharg, Risd Archives
Ecology and Environment
Ecological Planning Workshop Poster by Ian McHarg. April 24, 1970, RISD Auditorium.
State Of The Fisheries Report 1968/1969, Department Of Fisheries And Fauna, Western Australia
State Of The Fisheries Report 1968/1969, Department Of Fisheries And Fauna, Western Australia
Status Reports of the Fisheries and Aquatic Resources
The total value of the fisheries of Western Australia is the highest of any of the States, and the Western Australian rock lobster fishery is the most valuable single fishery in Australia.
The Pharmacology Of Rodenticides, S. A. Peoples
The Pharmacology Of Rodenticides, S. A. Peoples
Vertebrate Pest Conference Proceedings: 4th (1970)
The compounds used as rodenticides are tremendously varied in their chemical structure and mechanism of action. With a few exceptions, these agents are generally poisonous to all animals, including man, and a great deal of study has been directed to their toxicity in animals other than rodents. However, the development of new compounds as Norbormide and certain antifertility drugs which are highly selective in their action may justify the hope that the ideal rodenticide free of secondary toxic hazards will soon be available. Until this happy announcement is made, a review of the pharmacology of the older compounds is in …
Some Wildflowers Of Western Australia, C. F. H. Jenkins, A. S. George
Some Wildflowers Of Western Australia, C. F. H. Jenkins, A. S. George
Bulletins - 3000 - 3999
MUCH recent discussion on conservation has centred around the importance of wild flower reserves and the need for protecting one of thci State's most important tourist attractions. Although less important to visitors than the flowers, many of our wild animals hold equal interest for nature lovers and scientists, and they also need protection.
ALTHOUGH the brilliance and diversity of West Australian wildflowers are widely appreciated, the localities where they can best be observed in their natural state are not so well known.
In this article a brief outline is given of the more important districts in the south western part …
Algal Growth And Decomposition: Effects On Water Quality, Edward G. Foree, John S. Tapp Jr.
Algal Growth And Decomposition: Effects On Water Quality, Edward G. Foree, John S. Tapp Jr.
KWRRI Research Reports
The chemical composition of algae grown in batch culture depends mainly on environmental conditions, nutrient availability, presence of predators, cell age, and species. The effects of nutrient availability and cell age on the composition of three unialgal cultures (algae + bacteria) and one hetergeneous culture (algae + bacteria + microscopic animals) were evaluated. The cultures were grown in batch culture under both nutrient-abundant and nutrient deficient conditions and the changes in compositions were observed. Luxurious uptake where nutrients are incorporated into cellular protoplasm at levels greater than those necessary for growth, and super-luxurious uptake, where some nutrients are stored rather …
The Prairie Naturalist Volume 2, No. 1. March, 1970
The Prairie Naturalist Volume 2, No. 1. March, 1970
The Prairie Naturalist
EDITORIAL: Speaking of Ecologists ▪ Paul B. Kannowski
NEEDED: AN ETHICAL BASIS FOR ENVIRONMENTAL POLICY ▪ Gordon L. Iseminger
THE POPULATION PARADOX ▪ Gary L. Pearson
THE ENVIRONMENTAL CRISIS—A CALL TO ACTION ▪ Glen A. Sherwood
NORTH DAKOTA—1970 ▪ Philip B. Aus
Effects Of Abatement Of Domestic Sewage Pollution On The Benthos, Volumes Of Zooplankton, And The Fouling Organisms Of Biscayne Bay, Florida, J. Kneeland Mcnulty
Effects Of Abatement Of Domestic Sewage Pollution On The Benthos, Volumes Of Zooplankton, And The Fouling Organisms Of Biscayne Bay, Florida, J. Kneeland Mcnulty
Studies in Tropical Oceanography
No abstract provided.
Reducing Evaporation From Farm Dams : A Progress Report December 1969, I A F Laing
Reducing Evaporation From Farm Dams : A Progress Report December 1969, I A F Laing
Journal of the Department of Agriculture, Western Australia, Series 4
IN most seasons in the Western Australian Wheatbelt evaporation reduction techniques rate a low priority due to either the expense or the relative inefficiency of the techniques.
It is generally agreed that a similar investment in deepening or enlarging existing dams, or making new dams larger from the outset, is likely to be more profitable.
Attendance Report: Small Mammal Workshop, Clive D. Jorgensen
Attendance Report: Small Mammal Workshop, Clive D. Jorgensen
Memorandum
No abstract provided.
Plant Observations In Validation Studies, David W. Goodall
Plant Observations In Validation Studies, David W. Goodall
Memorandum
No abstract provided.
Supplying Wood Products For More People - A Challenge To The Forest Industry, John A. Segur, F. Bruce Lamb, Basil E. Allen
Supplying Wood Products For More People - A Challenge To The Forest Industry, John A. Segur, F. Bruce Lamb, Basil E. Allen
Yale School of the Environment Bulletin Series
No abstract provided.
The Control Of Algae, G R W Meadly
The Control Of Algae, G R W Meadly
Journal of the Department of Agriculture, Western Australia, Series 4
CONDITIONS in areas of still, stored water in Western Australia can easily become ideal for the development of algae and control measures may become necessary in farm dams and swimming pools.
Part I - Controlling The Soil Moisture Environment Of Transpiring Plants, Part Ii - Prediction Of Leaf Temperature Under Natural Atmospheric Conditions, Charles T. Haan, Billy J. Barfield, Robert Edling
Part I - Controlling The Soil Moisture Environment Of Transpiring Plants, Part Ii - Prediction Of Leaf Temperature Under Natural Atmospheric Conditions, Charles T. Haan, Billy J. Barfield, Robert Edling
KWRRI Research Reports
Part I
A technique for controlling the soil moisture potential in the root zone of transpiring plants was developed. The method uses the principles of unsaturated flow through a porous media to develop the desired moisture potential. In the case of non-steady state transpiration, the maximum possible fluctuation in the soil moisture potential can be determined by the techniques presented.
Part II
Two implicit leaf temperature prediction equations were derived from the energy balance approach. The equations define sensible and latent heat transfer from a plant population as a two step process:
- Transfer between the plant leaf and the canopy …
Emergency Chlorination Of Farm Water Supplies, H C. Hughes
Emergency Chlorination Of Farm Water Supplies, H C. Hughes
Journal of the Department of Agriculture, Western Australia, Series 4
TOWARDS the end of summer (and especially in a drought) the risk of water in dams, soaks, wells or tanks becoming polluted is increased.
Bore water is much less likely to be affected unless the bore is poorly sited near a farm building, such as a shearing or milking shed, a pig pen, or a septic tank system.
Some Ecological Relations Of Fairy Shrimps In Alkaline Habitats Of Nebraska, D. B. Mccarraher
Some Ecological Relations Of Fairy Shrimps In Alkaline Habitats Of Nebraska, D. B. Mccarraher
Nebraska Game and Parks Commission: Staff Research Publications
Ecological studies on the distribution of fairy shrimps have been made from 246 sites in the sandhills region of Nebraska. New records for Nebraska have been established for Artemia salina, Branchinecta campestris, B. lindahli, B. mackini and Cyzicus mexicanus. Seasonal populations of shrimp have been located in habitats containing permanent fish populations. Water mineralization was the dominant environmental condition related to the distribution of phyllopods with sodium and potassium compounds predominating in the strongly alkaline lakes. Several of the Artemia lakes were classified as hydroxide sites. Many of the alkaline ponds, where B. lindahli and B. campestris flourish, are …
Man And His Environment: The Ecological Limits Of Optimism, R. S. Miller, G. M. Woodwell, W. R. Burch, P. A. Jordan, R. L. Means
Man And His Environment: The Ecological Limits Of Optimism, R. S. Miller, G. M. Woodwell, W. R. Burch, P. A. Jordan, R. L. Means
Yale School of the Environment Bulletin Series
No abstract provided.
Natural Variation In Susceptibility Of Pinus To Neodiprion Sawflies As A Basis For The Development Of A Breeding Scheme For Resistant Trees, Walter R. Henson, Louis C. O'Neil, Francois Mergen
Natural Variation In Susceptibility Of Pinus To Neodiprion Sawflies As A Basis For The Development Of A Breeding Scheme For Resistant Trees, Walter R. Henson, Louis C. O'Neil, Francois Mergen
Yale School of the Environment Bulletin Series
No abstract provided.
Chemical Analyses Of Plant Tissues From The Hubbard Brook Ecosystem In New Hampshire, Gene E. Likens, F. Herbert Bormann
Chemical Analyses Of Plant Tissues From The Hubbard Brook Ecosystem In New Hampshire, Gene E. Likens, F. Herbert Bormann
Yale School of the Environment Bulletin Series
No abstract provided.
Fisheries Report No V (5) - Report On Marron In Farm Dams (Cherax Tenuimanus), N M. Morrissy
Fisheries Report No V (5) - Report On Marron In Farm Dams (Cherax Tenuimanus), N M. Morrissy
Fisheries Research Reports
A programme of selling marron (Cherax tenuimanus) to country dwellers for stocking farm dams, has been carried out by the Pemberton Trout Board for the past few years with considerable financial gain. In this case permission to sell the marron was granted by the Department of Fisheries and Fauna so as to encourage the provision of stocks of this large, freshwater crustacean for farmers in the dryer inland areas of the Southwest which are remote from sources of fresh fish and from natural stocks of marron.
The marron, however, have been sold indiscriminately, upon request, without any advice as to …
Fisheries Report No Iv (6) - Report On The Current Status Of Crocodiles In Western Australia, H. Robert Bustard Dr
Fisheries Report No Iv (6) - Report On The Current Status Of Crocodiles In Western Australia, H. Robert Bustard Dr
Fisheries Research Reports
The aim of the survey was fivefold,
(1) to determine the present abundance and composition of saltwater crocodile populations in Western Australia,
(2) to comment on the status of the freshwater crocodile in Western Australia following 7 years of total protection,
(3) to locate study area(s) for detailed work on crocodile biology,
(4) to investigate the feelings of people on the spot (especially shooters or ex-shooters) towards crocodile conservation, and
(5) to investigate law enforcement problems relating to crocodiles
Ultrasonic Shark Tag Monitoring System Technical Report, Thomas Thorson, Gordon Esterberg, James Johnson
Ultrasonic Shark Tag Monitoring System Technical Report, Thomas Thorson, Gordon Esterberg, James Johnson
School of Biological Sciences: Faculty Publications
Table of Contents:
Introduction
Description of System
Ultrasonic Tag
Ultrasonic Tag Monitor
Hyrdophones
Receiver-Recorder Unit
Receiver
Recorder
Batteries
Operation
Figures
Distribution List
Documentation Control Data – R & D (DD Form 1473)
Study To Save Block Island, Designer's News, May 19,1969, Students Of Risd, Risd Archives
Study To Save Block Island, Designer's News, May 19,1969, Students Of Risd, Risd Archives
Ecology and Environment
RISD Landscape Architecture Study to Save Block Island Article from Designer's News, May 19, 1969 student newspaper.
Stomatopod Crustacea Of The Western Atlantic, Raymond B. Manning
Stomatopod Crustacea Of The Western Atlantic, Raymond B. Manning
Studies in Tropical Oceanography
No abstract provided.
Dolichopodidae (Diptera) And Braconidae (Hymenoptera) Of Curlew Valley, G. F. Knowlton, W.J. Hanson, G.E. Bohart
Dolichopodidae (Diptera) And Braconidae (Hymenoptera) Of Curlew Valley, G. F. Knowlton, W.J. Hanson, G.E. Bohart
Memorandum
No abstract provided.