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Author: Millard Fillmore Gunderson
Publisher:
ISBN:
Category : Botulism
Languages : en
Pages : 98
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Author: Millard Fillmore Gunderson
Publisher:
ISBN:
Category : Botulism
Languages : en
Pages : 98
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Author: N. R. Ellis
Publisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 1426
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Author: Millard Fillmore Gunderson
Publisher:
ISBN:
Category :
Languages : en
Pages : 81
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Author: Andrew J. Simek
Publisher:
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Category :
Languages : en
Pages :
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This thesis investigates how the Bear River marsh0́9s protection became a national interest and a cause for conservation in the Progressive Era. The thesis documents how the marsh declined because of irrigation development culminating with an outbreak of avian botulism in 1910, and traces the long process to protect the marshland. The research focused on examining local water development patterns of the nineteenth and early twentieth centuries, ornithological research in the 1910s, and the national sportsmen0́9s conservation movement of the 1920s. Upon examination of these events, it becomes clear that a coalition of ornithologists, sportsmen, and policy makers worked together to institute change that affected the marsh. Through showing how groups came together in the past to work for conservation, this research highlights the important role that a coalition of groups can have in reshaping how a landscape is viewed and managed.
Author:
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Category :
Languages : en
Pages : 132
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Author: Gary A. Wobeser
Publisher: Springer Science & Business Media
ISBN: 1461559510
Category : Science
Languages : en
Pages : 318
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Management of wild waterfowl has become increasingly intensive. Many birds now hatch in managed nesting cover or in artificial nesting structures, use man-made wetlands, and winter on crowded refuges while consuming a grain diet The water they use is often limited in supply and may contain residues from its many prior users. Unfortunately, intensified management often results in new problems, among which disease is important There are many similarities between the current form of management used for some waterfowl and that used in domestic animals. In both, the objective is to maintain a healthy, productive population. Dealing with health problems in waterfowl will benefit from combining the skills of veterinary medicine and wildlife ecology. Revisiting this book after 15 years allowed me to consider changes at the interface between the two disciplines. Veterinary medicine traditionally has been concerned with the individual and with treating sick animals, while the ecologist is concerned with populations and the manager has limited interest in treating sick birds. During this period there has been a marked increase in awareness among veterinarians that they have a responsibility in wildlife and conservation biology. Curricula of many veterinary colleges now include material on non-domestic animals and attempt to put disease in an ecological context. Also during this time, waterfowl managers have become more aware of disease as a factor in population biology and there are early attempts to put numbers to "disease" in models of continental waterfowl populations.
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Category : Agriculture
Languages : en
Pages : 94
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Category : Fishes
Languages : en
Pages : 16
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Author: U.S. Fish and Wildlife Service
Publisher:
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Category : Fishery management
Languages : en
Pages : 20
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Author: Ronald M. Windingstad
Publisher:
ISBN:
Category : Anatidae
Languages : en
Pages : 16
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