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Full-Text Articles in Aquaculture and Fisheries
Habitat Use By Nesting And Roosting Bald Eagles In The Pacific Northwest, Robert G. Anthony, Richard L. Knight, George T. Allen, B. Riley Mcclelland, John I. Hodges
Habitat Use By Nesting And Roosting Bald Eagles In The Pacific Northwest, Robert G. Anthony, Richard L. Knight, George T. Allen, B. Riley Mcclelland, John I. Hodges
United States Fish and Wildlife: Staff Publications
The American bald eagle (Haliaeetus leucocephalus) was designated our national symbol in 1782. Since that time, populations of the species have declined due to a combination of factors including habitat loss, shooting, and environmental pollutants. As a result, in 1978 the U.S. Department of Interior officially listed the species as endangered in 43 of the 48 contiguous states and threatened in Oregon, Washington, Michigan, Wisconsin, and Minnesota. The bald eagle is protected under the Endangered Species Act, Migratory Bird Treaty Act, and the Bald and Golden Eagle Protection Act. These pieces of legislation protect the species from direct …
Habitat Models For Land-Use Planning: Assumptions And Strategies For Development, Adrian H. Farmer, Michael J. Armbruster, James W. Terrell, Richard L. Schroeder
Habitat Models For Land-Use Planning: Assumptions And Strategies For Development, Adrian H. Farmer, Michael J. Armbruster, James W. Terrell, Richard L. Schroeder
United States Fish and Wildlife: Staff Publications
Wildlife managers have long recognized that management goals must be constrained by the availability and suitability of habitat. This recognition, combined with ever increasing land development pressures, has resulted in environmental legislation emphasizing systematic approaches to collection and analysis of habitat information. Wildlife planners have responded with a variety of approaches to the development of models that quantify habitat requirements.
Hep As A Planning Tool: An Application To Waterfowl Enhancement, Scott C. Matulich, Jeffrey E. Hanson, Ivan Lines, Adrian Farmer
Hep As A Planning Tool: An Application To Waterfowl Enhancement, Scott C. Matulich, Jeffrey E. Hanson, Ivan Lines, Adrian Farmer
United States Fish and Wildlife: Staff Publications
To many, the principal role of wildlife agencies in public and private resource development has been that of impact mitigation. With known or pending habitat damage, biologists have to develop mitigation or compensation plans. Unfortunately, once in a mitigation framework, they are in a no-win situation, seeking remedial action at best. Yet, the potential exists for cooperative project planning, thereby facilitating mitigation of impacts before they occur, and enhancement of environmental amenities through project development. In fact, such planning is mandated by federal legislation (e.g., National Environmental Policy Act, Fish and Wildlife Coordination Act, Outdoor Recreation Act, etc.).
Development And Use Of A Habitat Gradient Model To Evaluate Wildlife Habitat, Henry L. Short
Development And Use Of A Habitat Gradient Model To Evaluate Wildlife Habitat, Henry L. Short
United States Fish and Wildlife: Staff Publications
Ecologists and wildlife managers are increasingly confronted with the problems of predicting the value of surface cover as wildlife habitat and developing management alternatives to offset wildlife values lost because of land-use change. These problems have become urgent and more acute because of increased demand for products from the land and diminished fiscal and manpower resources for obtaining meaningful environmental information for the decision maker. This paper describes a relatively rapid, simple, and quantitative process for evaluating the quality of an area as wildlife habitat.
Influence Of Cooperative Wildlife And Fishery Units On Graduate Education And Professional Employment, Rollin D. Sparrowe
Influence Of Cooperative Wildlife And Fishery Units On Graduate Education And Professional Employment, Rollin D. Sparrowe
United States Fish and Wildlife: Staff Publications
In June 1982, several private conservation organizations will join the Iowa State University, and the Iowa Conservation Commission, in a 50-year celebration of the Cooperative Research Unit concept. The first Cooperative Wildlife Research Unit began there in 1932 in response to a recognized need for trained biologists and scientific information in the field of wildlife conservation. The unique partnership between federal, state, university, and private entities that resulted, evolved into the current nationwide program. There are currently 21 wildlife units, 26 fishery units, and 3 combined fish and wildlife units at 31 universities in 29 states (Figure O. The Fishery …
Current Status And Management Challenges For Tule White-Fronted Geese, Daniel E. Timm, Michael L. Wege, David S. Gilmer
Current Status And Management Challenges For Tule White-Fronted Geese, Daniel E. Timm, Michael L. Wege, David S. Gilmer
United States Fish and Wildlife: Staff Publications
Since large, dark tule white-fronted geese (Anser albifrons gam belli Hartlaub) were first described in Texas over a century ago by Hartlaub (1852), and again 65 years later in California by Swarth and Bryant (1917), tule geese have been the subject of at least 14 studies in California and 8 attempts to locate summering birds in the Artic. Central questions of these efforts have been: Is the tule goose a distinct subspecies? What is their range and population size? How can the birds be identified? and What threatens their existence?
The purpose of this paper is to present the …
Aquatic Biota Of Bank Stabilization Structures On The Missouri River, North Dakota, Ralph M. Burress, Douglas A. Krieger, C. H. Pennington
Aquatic Biota Of Bank Stabilization Structures On The Missouri River, North Dakota, Ralph M. Burress, Douglas A. Krieger, C. H. Pennington
United States Fish and Wildlife: Staff Publications
Biological and physical data were collected from nine habitats on the Missouri River near Washburn, North Dakota. Sampling was conducted from mid-July to mid-October 1979 to compare the relative values of the habitats for fish and macroinvertebrates.
Resource Management Thrusts And Opportunities: National Parks And Wildlife Refuges, G. Ray Arnett
Resource Management Thrusts And Opportunities: National Parks And Wildlife Refuges, G. Ray Arnett
United States Fish and Wildlife: Staff Publications
Well, it's been an interesting year. Somehow, it got to be very convenient for some folks to misconstrue what the Secretary had said. Some of those folks just seemed determined to make James Watt a household name-and they succeeded. And those same folks succeeded, too, in increasing the membership roles of a few of the environmental groups. But I don't think they succeeded very well in listening to and understanding what the Secretary said a year ago .... So, as succinctly and plainly as possible, I will spell out again that the goals of this Administration weren't designed to create …
Effects Of Increased Human Populations On Wildlife Resources Of The Kenai Peninsula, Alaska, Edward E. Bangs, Ted H. Spraker, Theodore N. Bailey, Vernon D. Berns
Effects Of Increased Human Populations On Wildlife Resources Of The Kenai Peninsula, Alaska, Edward E. Bangs, Ted H. Spraker, Theodore N. Bailey, Vernon D. Berns
United States Fish and Wildlife: Staff Publications
In this paper, we will discuss what has occurred to several wildlife populations on the Kenai Peninsula as the human population increased. By discussing historical impacts, management techniques, and potential human impacts, we intend to show the significance of what occurred and may occur as human populations expand, both on the Kenai and in Alaska.
Wildlife Values Versus Human Recreation: Ruby Lake National Wildlife Refuge, Stephen H. Bouffard
Wildlife Values Versus Human Recreation: Ruby Lake National Wildlife Refuge, Stephen H. Bouffard
United States Fish and Wildlife: Staff Publications
Expanding human populations are making increased recreational demands on National Wildlife Refuges (NWR). The U.S Fish and Wildlife Service (FWS) is trying to accommodate these demands whenever possible. An important, but not primary objective of NWRs is to provide for various public uses, including recreation (U .S. Fish and Wildlife Service 1976a). The Refuge Recreation Act of 1962 (16 U.S.C. 460K-460K-4) authorizes the FWS to allow recreational uses on NWRs, National Fish Hatcheries and similar lands. This act specifies that all recreational uses must be secondary to the primary purpose of the refuge. While most refuge recreation programs do not …
Waterfowl Production At Malheur National Wildlife Refuge, 1942-1980, John E. Cornely
Waterfowl Production At Malheur National Wildlife Refuge, 1942-1980, John E. Cornely
United States Fish and Wildlife: Staff Publications
Malheur National Wildlife Refuge (NWR), Harney County, Oregon, is an important breeding area for Pacific Flyway Waterfowl. Trumpeter swans (Olor buccinator), Canada geese (Branta canadensis), and 14 species of ducks nest at Malheur NWR. The refuge is one of the most important redhead (Aythya americana) nesting areas in the western United States. Malheur NWR was established by President Theodore Roosevelt in 1908, primarily as a nesting area for migratory birds. The refuge also serves as an important migration stop for thousands of waterfowl and other migratory birds. Originally the refuge was called Malheur Lake …
California's Central Valley Wintering Waterfowl: Concerns And Challenges, David S. Gilmer, Michael R. Miller, Richard D. Bauer, John R. Ledonne
California's Central Valley Wintering Waterfowl: Concerns And Challenges, David S. Gilmer, Michael R. Miller, Richard D. Bauer, John R. Ledonne
United States Fish and Wildlife: Staff Publications
Few places on the North American continent can boast of the concentrations of migratory birds that winter in the Central Valley of California. Long before agriculture and industrialization came west, this great valley served as a major wintering ground for millions of migratory birds. Fall flights of waterfowl, shorebirds, waders, raptors, and passerines returned annually to inhabit the vast wetland, riparian, and grassland habitats which covered the valley floor (Dasmann 1966, Bakker 1971).
Major changes in the Central Valley during the last century have profoundly influenced its physical and biological features. Wetland, riparian, and grassland habitats have been devastated by …
Status Of Alaska Sea Otter Populations And Developing Conflicts With Fisheries, Ancel M. Johnson
Status Of Alaska Sea Otter Populations And Developing Conflicts With Fisheries, Ancel M. Johnson
United States Fish and Wildlife: Staff Publications
Although sea otters (Enhydra lutris) have been a relatively insignificant resource in Alaska during the twentieth century, the situation is changing. Remnant populations that recolonized most of their historic range are becoming recognized as a potentially valuable economic resource and as a competitor with some important shellfish fisheries. It is appropriate that sea otters should again become an important Alaskan resource because they were so significant in the initial exploration and settlement of Alaska by non-natives. In this paper I review changes in distribution and population abundance since 1740, recent changes in human attitudes toward sea otters, and …
Nonconsumptive Wildlife-Associated Recreation In The U.S.: Identifying The Other Constituency, James R. Lyons
Nonconsumptive Wildlife-Associated Recreation In The U.S.: Identifying The Other Constituency, James R. Lyons
United States Fish and Wildlife: Staff Publications
Sportsmen are the traditional clientele of wildlife management. As an organized force, sportsmen have long endorsed the principles of conservation upon which wildlife management is based. As a source of political and financial support, sportsmen continue to represent wildlife's most recognized constituency.
Status Of The Habitat Evaluation Procedures, Mel Schamberger, William B. Krohn
Status Of The Habitat Evaluation Procedures, Mel Schamberger, William B. Krohn
United States Fish and Wildlife: Staff Publications
The 1970s was a decade of increased awareness of environmental problems, and emphasis was placed on the development of procedures for predicting impacts of proposed developmental activities on natural systems. Impact assessment has evolved from a focus on species numbers, human use, species richness, and related methods to include the investigation of habitat as a supplemental or alternative approach to environmental planning, mitigation, species management, and impact assessment (Schamberger 1979, U.S. Fish and Wildlife Service 1980a, 1980b). The impetus for habitat-based assessment techniques came primarily from two sources: (1) environmental legislation requiring noneconomic project evaluations; and (2) an awareness within …