Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Life Sciences (635)
- Physical Sciences and Mathematics (410)
- Environmental Sciences (382)
- Ecology and Evolutionary Biology (237)
- Animal Sciences (207)
-
- Biodiversity (202)
- Social and Behavioral Sciences (191)
- Natural Resources and Conservation (189)
- Plant Sciences (154)
- Other Environmental Sciences (107)
- Terrestrial and Aquatic Ecology (107)
- Natural Resources Management and Policy (96)
- Botany (90)
- International and Area Studies (90)
- Entomology (86)
- Ornithology (76)
- Weed Science (76)
- Zoology (74)
- Systems Biology (73)
- Population Biology (64)
- Medicine and Health Sciences (63)
- Other International and Area Studies (63)
- Public Affairs, Public Policy and Public Administration (59)
- Environmental Health and Protection (57)
- Immunology and Infectious Disease (57)
- Behavior and Ethology (56)
- Parasitology (55)
- Environmental Policy (54)
- Earth Sciences (50)
- Veterinary Medicine (45)
- Keyword
-
- Nebraska (23)
- Ecology (14)
- Invasive species (13)
- Biodiversity (12)
- Birds (12)
-
- Rabies (12)
- Platte River (11)
- Coyote (10)
- Diet (10)
- Grus canadensis (9)
- Predation (9)
- Climate change (8)
- Drought (8)
- Sandhill crane (8)
- Canis latrans (7)
- Canis lupus (7)
- Home range (7)
- Remote sensing (7)
- Sus scrofa (7)
- Wildlife (7)
- Disease (6)
- Great Plains (6)
- Migration (6)
- Mongolia (6)
- Odocoileus virginianus (6)
- Surveillance (6)
- Survival (6)
- Barbuda (5)
- Behavior (5)
- Biology (5)
- Publication Year
- Publication
-
- United States Department of Agriculture Wildlife Services: Staff Publications (123)
- The Prairie Naturalist (72)
- United States Geological Survey, Northern Prairie Wildlife Research Center: Publications (64)
- School of Natural Resources: Faculty Publications (46)
- United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications (42)
-
- United States Geological Survey: Staff Publications (35)
- School of Biological Sciences: Faculty Publications (34)
- Insecta Mundi (28)
- Great Plains Research: A Journal of Natural and Social Sciences (through 2013) (27)
- Department of Entomology: Faculty Publications (25)
- Harold W. Manter Laboratory of Parasitology: Faculty Publications (22)
- Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications (21)
- Department of Agronomy and Horticulture: Faculty Publications (20)
- United States Department of Commerce: Staff Publications (20)
- Galliformes Specialist Group and Affiliated Societies: Newsletters (19)
- Proceedings of the North American Crane Workshop (19)
- Transactions of the Nebraska Academy of Sciences and Affiliated Societies (19)
- University of Nebraska State Museum: Mammalogy Papers (18)
- School of Natural Resources: Dissertations, Theses, and Student Research (17)
- United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications (16)
- Department of Plant Pathology: Faculty Publications (12)
- Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298 (11)
- Harold W. Manter Laboratory of Parasitology: Library Materials (11)
- Proceedings of the North American Prairie Conferences (11)
- United States National Park Service: Publications (11)
- Bird Control Seminars Proceedings (10)
- United States Army Corps of Engineers, Omaha District (10)
- Water Current Newsletter (9)
- Wildlife Damage Management Conference Proceedings (9)
- Agricultural Research Division: News and Annual Reports (8)
- Publication Type
Articles 1081 - 1110 of 1178
Full-Text Articles in Entire DC Network
Cultural Pressure On Sex Differences, Patricia Draper
Cultural Pressure On Sex Differences, Patricia Draper
Department of Anthropology: Faculty Publications
This paper suggests that sex differences in the behavior of children exist but are not necessarily intensified under certain cultural conditions. Under conditions of culture change to a sedentary economy, certain elements of male and female differentiated behavior are exploited in the process of increasing sex differentiation.
Water Current, Volume 7, No. 7, September/October 1975
Water Current, Volume 7, No. 7, September/October 1975
Water Current Newsletter
From the Desk of the Director
New Staff Members for NWRRI
Meeting of Institute Advisory Committee
Position Announcement
Deadline for Research Proposals
Corps Water Plan Receives Mixed Reaction
Nonpoint Source Pollution Study
Corps Begins Study of Beatrice Flood Problems
Untapped Coal to be Evaluated
Research Review: Detection of a Potential Health Hazard in Recreational and Other Surface Waters
The Prairie Naturalist Vol. 7 , Nos. 2 And 3. June-September, 1975
The Prairie Naturalist Vol. 7 , Nos. 2 And 3. June-September, 1975
The Prairie Naturalist
VASCULAR FLORA OF EMMONS COUNTY, NORTH DAKOTA ▪ R. P Williams and W. T. Barker
NOTES
Unusual Nesting Site of Barn Swallows ▪ W. A. Buresh
Summer Tanager in Burleigh County, North Dakota ▪ W. A. Buresh
Additional Record of Summer Tanager in North Dakota ▪ J. F. Cassel
Snowy Owl in McHenry County, North Dakota, in May ▪ W. A. Buresh
The Prairie Naturalist Volume 7, No.1. March 1975
The Prairie Naturalist Volume 7, No.1. March 1975
The Prairie Naturalist
MIGRATION OF BIRDS IN NORTH DAKOTA DURING FAll 1974 ▪ J. T. Lokemoen & D. H. Johnson.
REPRODUCTION AND DEVELOPMENT OF FOUR MALLARD LINES ▪ R. J. Greenwood
The Prairie Naturalist Volume 6, Nos. 3 And 4. September-December 1974
The Prairie Naturalist Volume 6, Nos. 3 And 4. September-December 1974
The Prairie Naturalist
A BIOLOGICAL SURVEY OF KRAFT SLOUGH ▪ G. L. Krapu & H. F. Duebbert
CHRISTMAS BIRD·COUNTS FOR NORTH DAKOTA - 1974 ▪ R. N. Randall
USE OF SMALL FENCES TO PROTECT GROUND BIRD NESTS FROM MAMMALIAN PREDATORS ▪ A. B. Sargeant & A. D. Kruse
BOOK REVIEW: Finding Birds in Minnesota ▪ E. M. Welter
The Prairie Naturalist Volume 6, No.2. June 1974
The Prairie Naturalist Volume 6, No.2. June 1974
The Prairie Naturalist
WOOD DUCKS IN NORTH DAKOTA ▪ H. A. Doty
AERIAL FEEDING BY RED-WINGED BLACKBIRDS NEAR FULLER'S LAKE, NORTH DAKOTA ▪ W. C. Royall, Jr. & O. E. Bray
ARBOREAL WOODCHUCKS? ▪ K. T. Killingbeck
IMAGES, CHOICE, AND COMMUNITY DEVELOPMENT ▪ E. Smith
BREEDING STATUS OF THE LEAST BITTERN IN NORTH DAKOTA ▪ C. L. Cink
NOTE: Maximum Sizes for Ambystomatid Salamanders ▪ D. W. Larson
A Review Of Coyote Control Research, Donald S. Balser
A Review Of Coyote Control Research, Donald S. Balser
Vertebrate Pest Conference Proceedings: 6th (1974)
Research on coyote control has lagged behind operational control for several decades. With the current controversy over toxicants and control of coyotes, attention has suddenly been given to the research needs of the problem. In the past research on annual damage problems, particularly predators, was concentrated on coming up with new lethal methods. The picture has changed with a definite need to study the entire problem, including the measurement of losses, the ecology of predators and prey, their behavior, and means of solving loss problems by non-lethal methods or mechanical protection. In any lethal control research, selectivity must be emphasized. …
Animal Damage Control Research–"Are Present Priorities Based On Actual Need?", Richard N. Smith
Animal Damage Control Research–"Are Present Priorities Based On Actual Need?", Richard N. Smith
Vertebrate Pest Conference Proceedings: 6th (1974)
Priorities regarding Bureau of Sport Fisheries and Wildlife vertebrate damage control research are in most cases based on actual need. Need is influenced by economic, political, legislative, and biological incentives. These incentives affect private industry, state and local governments, academia, and the federal government but in different ways. The Bureau of Sport Fisheries and Wildlife has 24 percent of its wildlife research budget invested in vertebrate damage control research. Its programs deal with predators, birds, and small mammals and research programs are problem oriented. Priorities are generally developed within the organization and are usually determined by biological need.
The Prairie Naturalist Volume 6, No.1. March 1974
The Prairie Naturalist Volume 6, No.1. March 1974
The Prairie Naturalist
AVIAN MORTALITY FROM COLLISIONS WITH OVERHEAD WIRES IN NORTH DAKOTA ▪ G. L. Krapu
NOTES ON THE BIOLOGY OF THE OLIVE-BACKED POCKET MOUSE PEROGNATHUS FASCIATUS ON THE NORTHERN GREAT PLAINS ▪ J. E. Pefaur & R. S. Hoffman
NOTE: Swans Resting on the Surface of A Dry Lake ▪ D. S. Gilmer
Pheasant Management Recommendations, William L. Baxter
Pheasant Management Recommendations, William L. Baxter
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Information on the life history and ecology of the ring-necked pheasant was collected on two, nine-square-mile study areas in Clay County, Nebraska, from 1954 through 1964. The study was designed to provide basic data that would allow scientifically based management decisions to be made for the maintenance and enhancement of ring-neck populations.
Findings indicate certain steps should be taken to improve pheasant populations on state-owned or controlled lands, as well as recommendations to improve habitat for pheasant populations on land not controlled by the Game Commission, These secondary proposals have statewide ramifications and offer potential for significantly improving pheasant populations …
How To Build Marine Artificial Reefs, R. O. Parker Jr., R. B. Stone, C. C. Buchanan, F. W. Steimle Jr.
How To Build Marine Artificial Reefs, R. O. Parker Jr., R. B. Stone, C. C. Buchanan, F. W. Steimle Jr.
United States Department of Commerce: Staff Publications
Artificial reefs provide or improve rough bottom habitat and offer fishery scientists and administrators an effective technique to conserve and develop coastal fishery resources. With careful planning and organized efforts, local reef committees can build reefs to improve fishing and contribute to the recreational and financial growth of coastal communities. Advice and procedures are presented for: 1) selecting construction materials, 2) determining a suitable reef site, 3) obtaining permits, 4) buoying the reef, and 5) preparing, transporting, and placing reef-building materials. Included in appendixes are instructions for preparing permits, addresses of Federal and State agencies involved in approving or funding …
Canis Lupus., L. David Mech
Canis Lupus., L. David Mech
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
Order Carnivora, Family Canidae. The genus Canis includes eight species. Approxi- mately 24 New World and eight Old World subspecies of C. lupus are recognized, the number depending on authorities accepted. For summary, see Mech (1970); for full synonymy, see Pocock (1935), Goldman (1944), Ellerman and Morrison- Scott (1951), Novikov (1956), and Hall and Kelson (1959).
Advantages In Mathematically Weighting Waterfowl Food Habits Data, George A. Swanson, Gary L. Krapu, James C. Bartonek, Jerome R. Serie, Douglas H. Johnson
Advantages In Mathematically Weighting Waterfowl Food Habits Data, George A. Swanson, Gary L. Krapu, James C. Bartonek, Jerome R. Serie, Douglas H. Johnson
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
The relative importance of various foods occurring in the diet of blue-winged teal (Anas discors), pintail (A. acuta), and gadwall (A. strepera) breeding in south-central North Dakota and lesser scaup (Aythya affinis) breeding in the vicinity of Great Slave Lake, Northwest Territories, are com- pared by the aggregate volume and aggregate percent methods. Advantages of the aggregate percent method are discussed in relation to the information presented.
The Prairie Naturalist Volume 5, No.4. December 1973
The Prairie Naturalist Volume 5, No.4. December 1973
The Prairie Naturalist
REESTABLISHMENT OF PRAIRIE IN EASTERN NORTH DAKOTA ▪ O. A. Stevens
THE AGE DISTRIBUTION OF ENVIRONMENTAL PERIODICALS ▪ D. H. Johnson
SOME OBSERVATIONS ON THE ECOLOGY OF PLUMATELLA REPENS (L.) (BRYOZOA: PLUMATELLIDAE) IN NORTHEASTERN NORTH DAKOTA ▪ R. D. Stoaks
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1973 ▪ R. N. Randall 61
NOTE: Red-bellied Woodpecker in Rolette, County, North Dakota ▪ D. T. Disrud 52
Index to Volume 5
The Prairie Naturalist Volume 5, No.3. September 1973
The Prairie Naturalist Volume 5, No.3. September 1973
The Prairie Naturalist
PRELIMINARY LIST OF NATURAL AREAS IN NORTH DAKOTA ▪ Harold A. Kantrud
BREEDING BIRD POPULATIONS OF RIVERINE FORESTS IN EASTERN MONTANA ▪ Roger L. Kroodsma
The Prairie Naturalist Volume 5, No.2. June 1973
The Prairie Naturalist Volume 5, No.2. June 1973
The Prairie Naturalist
SOME ASPECTS OF MINK-WATERFOWL RELATIONSHIPS ON PRAIRIE WETLANDS ▪ Robert T. Eberhardt
SUMMER AND FALL FOODS OF MINK ON THE J. CLARK SALYER NATIONAL WILDLIFE REFUGE ▪ Wayne F. Cowan and James R. Reilly
GIANT CANADA GEESE ▪ S. O. Kolstoe
SOME LICHENS OF BOG AND PAPER BIRCH FROM NORTH DAKOTA ▪ Dennis T. Disrud and Thomas D. Trana
A PALEOCENE FOSSIL LOCALITY IN SOUTHEASTERN SASKATCHEWAN: THE SHORT CREEK SECTION ▪ Paul L. Broughton
NOTE: A new orchid for North Dakota ▪ Robert E. Stewart
Sources, Paul A. Johnsgard
Sources, Paul A. Johnsgard
Grouse and Quails of North America by Paul A. Johnsgard
Bibliography; more than 600 works cited
Reproduction In The Red Squirrel (Tamiasciurus Hudsonicus) In Colorado, Richard A. Dolbeer
Reproduction In The Red Squirrel (Tamiasciurus Hudsonicus) In Colorado, Richard A. Dolbeer
United States Department of Agriculture Wildlife Services: Staff Publications
Information on reproduction of the red squirrel (Tamiasciumrs hudsonicus) can be gleaned from studies in the northeastern United States (Klugh, 1927; Hamilton, 1939; Layne, 1954) and in western Canada (Miller, 1970; Smith, 1968; Kemp and Keith, 1971; Wood, 1967). However, there is a paucity of information on reproduction from the mountainous regions of the western United States. This paper presents reproductive information on the red squirrel from Colorado and helps fill this void. In addition, the reproductive strategy of red squirrels is briefly compared with that of snowshoe hares.
The Prairie Naturalist Volume 5, No. 1. March 1973
The Prairie Naturalist Volume 5, No. 1. March 1973
The Prairie Naturalist
DATES FOR FIRST FLOWERS ▪ O. A. Stevens
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1972 ▪ Robert N. Randall 7
NORTHERN ENVIRONMENTAL COUNCIL CORPORATE AWARD, 1972—RESPONSE ▪ K. A. Carlson
ALGAL ASSOCIATIONS IN NEARSHORE WATERS OF GOLDEN LAKE, A SHALLOW PRAIRIE LAKE IN EASTERN NORTH DAKOTA ▪ Douglas W. Larson
NOTE
Observations of Wintering Bald Eagles at Garrison Dam, North Dakota ▪ Frank A. Splendoria
The Prairie Naturalist Volume 4, Nos. 3 And 4. September–December 1972
The Prairie Naturalist Volume 4, Nos. 3 And 4. September–December 1972
The Prairie Naturalist
THE SANDHILL CRANE WITH EMPHASIS ON ASPECTS
RELATED TO NORTH DAKOTA ▪ Douglas H. Johnson and Robert E. Stewart
SIZE AND COLORATION CHARACTERISTICS OF NEOTENIC SALAMANDERS IN DEVILS LAKE, N. D. ▪ Douglas W. Larson
BIRDS' EGGS: AN AID TO NATURE APPRECIATION ▪ S. O. Kolstoe
BIRD MORTALITY AT FOUR TOWERS IN EASTERN NORTH DAKOTA — FALL 1972 ▪ Michael Avery and Tom Clement
POPULATION IRRUPTION OF THE LEAST WEASEL (Mustela nivalis) IN EAST CENTRAL NORTH DAKOTA ▪ John T. Lokemoen and Kenneth F. Higgins
Water Resources News, Volume 4, No. 8, October 1972
Water Resources News, Volume 4, No. 8, October 1972
Water Current Newsletter
Updated Version of Proposed Regulations Now Available
EPA Issues New Application Form for Submission of Grant Proposals
Reclamation and Reuse of Solids and Wastes
Fall Meeting of Nebraska Section of AWRA
Technology Transfer Conference
OWRR Director Resigns
Requested Delay in Big Blue Plan
Missouri River Waterfront
Missouri River Basin Commission Notes
Missouri River Money Hurdle
Fish Tale
Water Pollution Veto Overturned
OWRR Priorities for Fiscal 1974
The Prairie Naturalist Volume 4, No. 2. June 1972
The Prairie Naturalist Volume 4, No. 2. June 1972
The Prairie Naturalist
EDITORIAL: Coordination: A Step for Environmental Protection ▪ Paul B. Kannowski
AN ANALYSIS OF BARN OWL AND GREAT HORNED OWL PELLETS FROM WESTERN NEBRASKA ▪ Eric A. Rickart
SUMMER OBSERVATIONS OF THE SHORT-EARED OWL IN THE RED RIVER VALLEY ▪ W. J. Walley
ADDITIONAL GLAUCOUS GULL RECORD FOR NORTH DAKOTA ▪ B. J. Rose
MIGRATION OF BIRDS IN NORTH DAKOTA DURING FALL 1971 ▪ Douglas H. Johnson, John T. Lokemoen and Paul F. Springer
WIDGEONGRASS BALLS ON ALKALI LAKES ▪ George A. Swanson and Paul F. Springer
A PROBABLE INSTANCE OF SONGBIRD COLLISION MORTALITY ▪ R. Wayne Weier
MUNICIPAL FLOODPLAIN …
The Prairie Naturalist Vol. 4, No.1. March, 1972
The Prairie Naturalist Vol. 4, No.1. March, 1972
The Prairie Naturalist
EDITORIAL: Advertising by Power Suppliers ▪ William A. Buresh
FIRST FLOWERS OF TREES, SHRUBS AND VINES IN THE FARGO, NORTH DAKOTA AREA ▪ O. A. Stevens
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1971 ▪ Robert N. Randall
ENVIRONMENTAL LEGISLATION IN NORTH DAKOTA—EXPECTATIONS AND REALITIES ▪ Paul B. Kannowski
SEASONAL NOTES ON PLANKTON ALGAE OF EAST STUMP LAKE, NORTH DAKOTA ▪ Dean W. Blinn
A SKUNK WITH A GLASS COLLAR ▪ Peter W. Rakowski
SPRING MIGRATION OF BIRDS IN NORTH DAKOTA IN 1971 ▪ Paul F. Springer, Douglas H. Johnson and John T. Lokemoen
NOTE
Red throated loon observed on Lake Ashtabula, …
Water Resources News, Volume 4, No. 3, March 1972
Water Resources News, Volume 4, No. 3, March 1972
Water Current Newsletter
1972 Annual Meeting of UCOWR
Summer Short Course Planned
Simulation of Water Resources Systems
Institute on Applications of Stochastic Methods in Civil Engineering
Institute on River Mechanics
Water Resources Systems - Short Course
International Symposium on Mathematical Modelling Techniques in Water Resources Systems
Seminar on Advances in Practical Hydrology
NWRA Resolutions
EPA to Be Advised By Experts on Sewage Plant Construction
GAO Questions EPA Insistence on Clean Waste Water
Study on Water Subsidies
EPA Bias for Sewage Hinders Farm Cleanup
Land Use Planning
Rural Development Act (HR 12931) Passed by House
Saline Water Bill Goes to House
1973 USGS Budget …
The Interspersion Index As A Technique For Evaluation Of Bobwhite Quail Habitat, William L. Baxter, Carl W. Wolfe
The Interspersion Index As A Technique For Evaluation Of Bobwhite Quail Habitat, William L. Baxter, Carl W. Wolfe
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Some forty years ago, the concept of habitat interspersion was advanced by Aldo Leopold (1931). Indicating then that "we are only on the threshold of an understanding of the ecology of game species," Leopold went on to postulate his law of interspersion which recognized that “game is a phenomenon of edges.” Although the validity of Leopold's premises has been documented both directly and indirectly many times in the past four decades, the complexity and frustration in describing ecological diversity of game range has continued to pose a problem for wildlife managers since 1931.
The Prairie Naturalist Vol. 3, Nos. 3 And 4. September-December, 1971
The Prairie Naturalist Vol. 3, Nos. 3 And 4. September-December, 1971
The Prairie Naturalist
EDITORIAL: Badlands-Old and New ▪ Paul B. Kannowski
SEASONAL INVESTIGATIONS OF ALGAE FROM DEVILS LAKE, NORTH DAKOTA ▪ Richard Verch and Dean W. Blinn
THE VASCULAR FLORA OF PEMBINA COUNTY, NORTH DAKOTA ▪ Rays E. Willenbring and William T. Barker
LET'S EAT WILD ▪ Alan M. Cvancara
SURF SCOTER IN NORTH DAKOTA ▪ Harold A. Kantrud
SNOW GOOSE-CANADA GOOSE HYBRIDS ▪ David C. McGlauchlin
NOTES
Cowbird parasitism of an upland plover nest ▪ Kenneth F. Higgins
Birds sighted within one hour from one observation point in Burleigh County, North Dakota ▪ William A. Buresh
Golden-winged warbler in Burleigh County, North …
The Prairie Naturalist Volume 3, No.2. June, 1971
The Prairie Naturalist Volume 3, No.2. June, 1971
The Prairie Naturalist
EDITORIAL: Environmental Rights ▪ Paul B. Kannowski
RIVER BASINS PLANNING ▪ H. A. Hendrickson
WATER RESOURCE PLANNING GONE AMUCK ▪ Charles H. Stoddard
THE INTERACTION OF CITIZENS' GROUPS AND GOVERNMENT AGENCIES WITH RESPECT TO ENVIRONMENTAL PROBLEMS ▪ Robert L. Burgess
WORDS AND MEANINGS ▪ Paul T. Crary
ENFORCEMENT OF NORTH DAKOTA ENVIRONMENTAL LAWS AND REGULATIONS ▪ Robert E. Beck
BIRDS OBSERVED IN NORTH DAKOTA DURING THE WINTER OF 1970-71 ▪ John T. Lokemoen and Paul E. Springer
STATUS OF CLARK'S NUTCRACKER IN NORTH DAKOTA ▪ Lewis W. Oring and Robert W. Seabloom
WINGED ANTS AS FISH FOOD ▪ Charles H. …
Systematics Of Southern Banner-Tailed Kangaroo Rats Of The Dipodomys Phillipsii Group, Hugh H. Genoways, J. Knox Jones Jr.
Systematics Of Southern Banner-Tailed Kangaroo Rats Of The Dipodomys Phillipsii Group, Hugh H. Genoways, J. Knox Jones Jr.
University of Nebraska State Museum: Mammalogy Papers
Both nongeographic and geographic variation was assessed in southern banner-tailed kangaroo rats of the nominal species Dipodomys phillipsii and D. ornatus . Univariate and multivariate analyses were employed in consideration of geographic variation. D. ornatus is arranged as a subspecies of D. phillipsii, in which four races (phillipsii, ornatus, perotensis, and oaxacae) are recognized. Some observations on natural history also are included.
The Prairie Naturalist Volume 3, No.1 March, 1971
The Prairie Naturalist Volume 3, No.1 March, 1971
The Prairie Naturalist
EDITORIAL: One House for Natural Resource Management ▪ Paul B. Kannowski
CHECKLIST OF BIRDS IN NORTH DAKOTA ▪ Robert E. Stewart
ADDITIONAL INFORMATION ON THE WOOD DUCK IN NORTH DAKOTA ▪ Edmund A. Hibbard
NOTES ON DANDELIONS ▪ O. A. Stevens
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1970 ▪ Robert N. Randall
THE EROSION OF ONE OF MAN'S MOST PRECIOUS NATURAL RESOURCES: HIS FREEDOM OF CHOICE ▪ Gordon L. Iseminger
NOTEWORTHY PLANTS OF THE NORTH DAKOTA PRAIRIE COTEAU FOREST ▪ W. Carter Johnson
NOTE — Duck mortality caused by wind ▪ Harold Kantrud
An Ecological Rationale For The Natural Or Artificial Regulation Of Native Ungulates In Parks, Glen F. Cole
An Ecological Rationale For The Natural Or Artificial Regulation Of Native Ungulates In Parks, Glen F. Cole
United States National Park Service: Publications
The results from studies of both naturally and artificially regulated ungulate populations in four Rocky Mountain parks are reviewed. Study findings on population regulation processes, the role of predators, natural mortality and natality, and ungulate habitat and food relationships suggest that previous assumptions which were the basis for artificially regulating ungulates over-estimated the regulatory effects of predators and did not always distinguish natural from human-influenced conditions or changes. The suggested rationale for artificially regulating native ungulates in Rocky Mountain parks is: a human influence that causes unnatural successional trends by restricting ungulates from freeranging over an ecologically complete habitat (1) …