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Articles 3481 - 3510 of 3704
Full-Text Articles in Entire DC Network
Maps Of Distribution And Abundance Of Selected Species Of Birds On Uncultivated Native Upland Grasslands And Shrubsteppe In The Northern Great Plains, Harold A. Kantrud
Maps Of Distribution And Abundance Of Selected Species Of Birds On Uncultivated Native Upland Grasslands And Shrubsteppe In The Northern Great Plains, Harold A. Kantrud
United States Fish and Wildlife Service: Publications
Many areas of the northern Great Plains (Fenneman 1931) remain poorly known ornithologically. Knowledge of species distribution in portions of this vast area has been advanced by recent State birds books (Stewart 1975; South Dakota Ornithologists' Union 1978) but many voids remain. Especially desirable for biologists and land managers is information concerning the relative abundance of plant and animal species over large land areas. This information can only be obtained from extensive surveys of the biota. The field of community ecology has been severely hampered by lack of information on species abundance (Dice 1930; Cain 1947; Partch 1962; Udvardy 1963). …
Aquatic Macroinvertebrates Of Three Acid Bogs On Crowley's Ridge In Northeast Arkansas, Jerry L. Farris, George L. Harp
Aquatic Macroinvertebrates Of Three Acid Bogs On Crowley's Ridge In Northeast Arkansas, Jerry L. Farris, George L. Harp
Journal of the Arkansas Academy of Science
Qualities and quantities of parameters composing the bog systems in Northeast Arkansas are not entirely reflective of those defining bogs of the northern United States. While pH is restricting to the organisms of each bog studied (4.8-6.9), the major limiting factor is the amount of available water. Three acidophilic bogs with shallow water depths (2-30 cm) yielded a total of 75 aquatic macroinvertebrate taxa. The bog with greatest surface area supported 67 taxa and a mean numerical standing crop of 14 organisms/2 hr sampling period. The bog with the smallest surface area had 13 taxa and a mean standing crop …
Striving For Common Ground: Humane And Scientific Considerations In Contemporary Wildlife Management, Stephen R. Kellert
Striving For Common Ground: Humane And Scientific Considerations In Contemporary Wildlife Management, Stephen R. Kellert
International Journal for the Study of Animal Problems
Although there is a diversity of opinion about how to view the relationship between humans and wildlife, recent political pressures from the current administration make it mandatory that these diverse groups coalesce to use their combined leverage to halt the planned incursions into the remaining habitats of wildlife. It is also essential to begin to see nature as a complex and interrelated whole and to respect the integrity of that whole rather than select individual species for affection and protection.
Bureaucracy And Wildlife: A Historical Overview, Edward E. Langenau
Bureaucracy And Wildlife: A Historical Overview, Edward E. Langenau
International Journal for the Study of Animal Problems
This paper provides a framework for understanding the Government's position on many wildlife topics, including humane ethics. The Government's historical role in wildlife conservation is traced to pertinent theories of bureaucracy. It is shown that Government involvement in wildlife conservation increased through successive stages of change because of interest group activity.
Striving For Common Ground: Humane And Scientific Considerations In Contemporary Wildlife Management, Stephen R. Kellert
Striving For Common Ground: Humane And Scientific Considerations In Contemporary Wildlife Management, Stephen R. Kellert
Nature Collection
Although there is a diversity of opinion about how to view the relationship between humans and wildlife, recent political pressures from the current administration make it mandatory that these diverse groups coalesce to use their combined leverage to halt the planned incursions into the remaining habitats of wildlife. It is also important to begin to see nature as a complex and interrelated whole, and to respect the integrity of that whole, rather than simply select individual species for affection and protection.
Lucille Vinyard Journal 1982, Lucille Vinyard
Lucille Vinyard Journal 1982, Lucille Vinyard
Lucille Vinyard Journal Collection
No abstract provided.
Vegetation Pattern And Disturbance Effects In The Subalpine-Alpine Interface, Valley Of The Ten Peaks, Alberta, Katherine J. Miller
Vegetation Pattern And Disturbance Effects In The Subalpine-Alpine Interface, Valley Of The Ten Peaks, Alberta, Katherine J. Miller
Theses and Dissertations (Comprehensive)
There have been several recent calls in the biogeography and vegetation ecology literature to investigate more thoroughly the role of recurrent disturbance or perturbation in the dynamics of subalpine communities, by assessing persistence and change in the dominant species population. In order to study the relationship between conifer regenerative effectiveness, disturbance effects, and the nature of the vegetation pattern, a field study was made of the vegetative cover (composition, abundance, dominance) and its performance (survival, vigour, and reproductive mode) in the upper subalpine zone in the Valley of the Ten Peaks, Banff National Park, Alberta. The occurrence of stresses and …
The Effects Of Copper On Skeletonema Costatum (Greville) Cleve, Susanne Sybille Jackman
The Effects Of Copper On Skeletonema Costatum (Greville) Cleve, Susanne Sybille Jackman
Biological Sciences Theses & Dissertations
Copper levels and dominant phytoplankton species composition were examined from six sites in Kings Creek on Virginia's Eastern Shore from March to August 1980. Creek copper levels were determined by an APDCMIBK extraction procedure and ranged from 0.003 to 0.020 mg/1. Diatoms were the dominant phytoplankters with Skeletonema costatum (Greville) Cleve emerging as a major late summer species.
Subsequent laboratory studies involved 96-hour experiments using Skeletonema costatum (clone Skel) grown in enriched natural seawater. The water was collected from Kings Creek and enriched to Guillard and Ryther's (1962) f/2 media levels. Cupric sulfate was added to the experimental culture media …
State Of The Fisheries Report 1980, Department Of Fisheries And Wildlife, Western Australia
State Of The Fisheries Report 1980, Department Of Fisheries And Wildlife, Western Australia
Status Reports of the Fisheries and Aquatic Resources
Western Australia has maintained its position as the top fishing State. The catch in Western Australia of fish, crustaceans and molluscs in 1979/80 was worth $85.7 million to the fishermen, which is 27 per cent of the total value for Australia.
The Buller-Steer Syndrome, Richarad Ulbrich
The Buller-Steer Syndrome, Richarad Ulbrich
International Journal for the Study of Animal Problems
Bulling among steers is an abnormal behavioral trait and is a common health and economic problem in feedlot operations. Factors associated with the buller-steer syndrome are hormonal implantation, seasonality and environmental conditions, stress, overcrowding, and social interaction between individuals. Research has examined relationships between these and other factors and buller occurrence. Boredom of feedlot cattle may contribute more to buller occurrence and other undesirable behavior than we might suspect. Research is needed to determine the feasibility of enriching the environment of penned livestock in general, the goal of which would be, in theory, eliminating undesirable behavior and increasing performance.
The Buller-Steer Syndrome, Richard Ulbrich
The Buller-Steer Syndrome, Richard Ulbrich
Ethology Collection
Bulling among steers is an abnormal behavioral trait and is a common health and economic problem in feedlot operations. Factors associated with the buller-steer syndrome are hormonal implantation, seasonality and environmental conditions, stress, overcrowding, and social interaction between individuals. Research has examined relationships between these and other factors and buller occurrence. Boredom of feedlot cattle may contribute to buller occurrence and other undesirable behavior more than we might suspect. Research is needed to determine the feasibility of enriching the environment of penned livestock in general, the goal of which would be, in theory, the elimination of undesirable behavior as well …
Lucille Vinyard Journal 1981, Lucille Vinyard
Lucille Vinyard Journal 1981, Lucille Vinyard
Lucille Vinyard Journal Collection
No abstract provided.
Use Of Recreation Opportunity Planning To Inventory Arid Lands In Eastern Oregon - A Demonstration, Michael J. Manfredo, Perry J. Brown
Use Of Recreation Opportunity Planning To Inventory Arid Lands In Eastern Oregon - A Demonstration, Michael J. Manfredo, Perry J. Brown
Forest Management Faculty Publications
This paper reports on the use of computer and hand dravn techniques for Implementing the Recreation Opportunity Planning inventory and analysis phases for the Steens Mountain Recreation Lands. Techniques were compared for land classifications and time and monetary costs. Results show computer mapping less likely to result in classification errors, but more costly to conduct.
Sampling Problems And Interpretation Of Chemical Analysis Of Mineral Springs Used By Wildlife, D. Fraser, E. Reardon, F. Dieken, B. Loescher
Sampling Problems And Interpretation Of Chemical Analysis Of Mineral Springs Used By Wildlife, D. Fraser, E. Reardon, F. Dieken, B. Loescher
Habitat Assessment and Management Collection
Mineral-rich springs used by wildlife were studied in order to develop an appropriate sampling technique. The mineral content of the water varied spatially within a lick, apparently because of contamination by nonlick water and animal urine. The spring source usually could be located with a conductivity meter. Samples contaminated by animal urine could be recognized by their high N content and usually by their color. The distinctive chemical composition of licks is best appreciated by comparing filtered samples of lick water with nonlick water collected nearby. Field filtration was necessary when samples were preserved with acid for trace-metal analysis. Soil …
The Public Governance Of Science And Research Animal Welfare, T. E. Malone
The Public Governance Of Science And Research Animal Welfare, T. E. Malone
International Journal for the Study of Animal Problems
The following is excerpted from a speech given by Dr. Thomas E. Malone, Deputy Director of the National Institutes of Health, at the 26th Annual Meeting of the American Association of Laboratory Animal Scientists (AALAS), Anaheim, California, October 5, 1977.
Use Of Peat Hydrolysate For Cultivation Of The Yeast, Candida Utilis, Jeffrey S. Denny, Allen G. Good
Use Of Peat Hydrolysate For Cultivation Of The Yeast, Candida Utilis, Jeffrey S. Denny, Allen G. Good
Journal of the Minnesota Academy of Science
No abstract provided.
Lucille Vinyard Journal 1980, Lucille Vinyard
Lucille Vinyard Journal 1980, Lucille Vinyard
Lucille Vinyard Journal Collection
No abstract provided.
The Zooplankton Communities Of Tomales Bay, California, Debby Jane Johnston
The Zooplankton Communities Of Tomales Bay, California, Debby Jane Johnston
University of the Pacific Theses and Dissertations
This thesis represents a zooplankton study of Tomales Bay, Marin County, California. It consists of two papers. The first paper, "The Abundance of Copepods in Tomales Bay, California" has been submitted to the California Fish and Game for publication. The second paper, "Diet Studies of the Ctenophore Pleurobrachia bachei has been submitted to Fishery Bulletin. The raw data has been compiled in the Appendix.
The Prairie Naturalist Volume 11, Number 4. December 1979
The Prairie Naturalist Volume 11, Number 4. December 1979
The Prairie Naturalist
THE STATUS OF HERONS, EGRETS AND IBISES IN NORTH DAKOTA ▪ J. T. Lokomoen
RANGE EXPANSION OF BAIRD'S SPARROW IN SOUTH DAKOTA ▪ H. A. Kantrud and C. A. Faanes
NESTING RECORDS OF THE WOOD THRUSH IN NORTH DAKOTA ▪ S. O. Lambeth and D. O. Lambeth
SOME ECOLOGICAL ASPECTS OF MARBLED GODWITS AND WILLETS IN NORTH DAKOTA ▪ K. F. Higgins, L. M. Kirsch, M. R. Ryan and R. B. Renken
NOTES ON THE INCUBATION BEHAVIOR OF BLACK-BELLIED WHISTLING DUCKS ▪ E G. Bolen and E. N. Smith
NOTES
Red Fox Captures Sharp-tailed Grouse at the Lek ▪ S. …
Peter J. P. Whitehead Review Of Spencer Wilkie Tinker, Fishes Of Hawaii, Peter J. P. Whitehead
Peter J. P. Whitehead Review Of Spencer Wilkie Tinker, Fishes Of Hawaii, Peter J. P. Whitehead
Pacific Studies
No abstract provided.
The Prairie Naturalist Volume 11, Number 3. September 1979
The Prairie Naturalist Volume 11, Number 3. September 1979
The Prairie Naturalist
DISTRIBUTION AND NATURAL HISTORY OF AMPHIBIANS AND REPTILES IN WESTERN NEBRASKA WITH ECOLOGICAL NOTES ON THE HERPETILES OF ARAPAHO PRAIRIE ▪ R. E. Ballinger, J. D. Lynch and P. H. Cole
AVIAN MORTALITY FROM A SEVERE HAIL STORM ▪ J. L. Piehl
EFFECTS OF A SUMMER STORM ON BIRD POPULATIONS ▪ D. H. Johnson
SEXING AND AGING CRITERIA FOR THE WHITE PELICAN ▪ G. R. Lingle and N. F. Sloan
CANVASBACK DUCK RECOVERS FROM COMPOUND LUXATION TO WING ▪ H. A. Doty
SECOND NORTH DAKOTA RECORD OF LOUISIANA WATERTHRUSH ▪ C. A. Faanes
FIRST NESTING RECORD OF A LOUISIANA HERON …
Front Matter, Elephant Editors
Observations In Tsavo National Park, Kenya, Evans E. Mgaah
Observations In Tsavo National Park, Kenya, Evans E. Mgaah
Elephant
Personal observations from four years as a game ranger in Tsavo National Park, Kenya.
Captive Elephant Population Of North America: 1979 Update, Elephant Editors
Captive Elephant Population Of North America: 1979 Update, Elephant Editors
Elephant
Survey of elephants in captivity, 1979.
Observations Of Elephants In East And Southern Africa, Jeheskel Shoshani
Observations Of Elephants In East And Southern Africa, Jeheskel Shoshani
Elephant
Selected short observations on African elephants (Loxodonta africana) made during 1978 in East and Southern Africa.
Iucn/Wwf Help Wanted, Elephant Editors
Iucn/Wwf Help Wanted, Elephant Editors
Elephant
A published plea from the IUCN/World Wildlife Fund Conservation Programme in Indonesia asking for information regarding endangered elephants in Sumatra.
Elephant Symposium And Related Activities, Elephant Editors
Elephant Symposium And Related Activities, Elephant Editors
Elephant
Agenda for the upcoming Elephant Symposium at the American Society of Mammalogists 59th Annual Meeting, June 20th, 1979.
Information From The Elephant Interest Group Questionnaire, Elephant Editors
Information From The Elephant Interest Group Questionnaire, Elephant Editors
Elephant
Elephant-related activities of answering respondents to the newsletter's questionnaire.
Report On The Elephants Of Tongaland, Clive Walker
Report On The Elephants Of Tongaland, Clive Walker
Elephant
Report from a preliminary survey of elephants in Southern Africa by the Endangered Wildlife Trust Elephant Group.
Financial Report And Acknowledgments, Elephant Editors
Financial Report And Acknowledgments, Elephant Editors
Elephant
Accounting of the Elephant Interest Group for production of the journal.