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Author: N. R. Ellis
Publisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 1426
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Book Description
Author: N. R. Ellis
Publisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 1426
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Book Description
Author: Millard Fillmore Gunderson
Publisher:
ISBN:
Category : Botulism
Languages : en
Pages : 98
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Book Description
Author: Foster Hendrickson Benjamin
Publisher:
ISBN:
Category : Tephritidae
Languages : en
Pages : 1480
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Book Description
Author: Jean-Pierre L. Savard
Publisher: CRC Press
ISBN: 1482248980
Category : Nature
Languages : en
Pages : 604
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Book Description
The past decade has seen a huge increase in the interest and attention directed toward sea ducks, the Mergini tribe. This has been inspired, in large part, by the conservation concerns associated with numerical declines in several sea duck species and populations, as well as a growing appreciation for their interesting ecological attributes. Reflec
Author:
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Category : Agriculture
Languages : en
Pages : 94
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Author: Philip Garone
Publisher: University of California Press
ISBN: 0520355571
Category : Nature
Languages : en
Pages : 440
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Book Description
This is the first comprehensive environmental history of California’s Great Central Valley, where extensive freshwater and tidal wetlands once provided critical habitat for tens of millions of migratory waterfowl. Weaving together ecology, grassroots politics, and public policy, Philip Garone tells how California’s wetlands were nearly obliterated by vast irrigation and reclamation projects, but have been brought back from the brink of total destruction by the organized efforts of duck hunters, whistle-blowing scientists, and a broad coalition of conservationists. Garone examines the many demands that have been made on the Valley’s natural resources, especially by large-scale agriculture, and traces the unforeseen ecological consequences of our unrestrained manipulation of nature. He also investigates changing public and scientific attitudes that are now ushering in an era of unprecedented protection for wildlife and wetlands in California and the nation.
Author: Gary A. Wobeser
Publisher: Springer Science & Business Media
ISBN: 1461559510
Category : Science
Languages : en
Pages : 318
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Book Description
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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ISBN:
Category : Fishes
Languages : en
Pages : 948
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Author: George W. Sciple
Publisher:
ISBN:
Category : Avian botulism
Languages : en
Pages : 20
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Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 20
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Book Description
