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Author:
Publisher:
ISBN:
Category : Animal introduction
Languages : en
Pages : 608
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Author:
Publisher:
ISBN:
Category : Animal introduction
Languages : en
Pages : 608
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Book Description
Author:
Publisher:
ISBN:
Category : Animal introduction
Languages : en
Pages : 182
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Author:
Publisher:
ISBN:
Category : Sea otter
Languages : en
Pages : 112
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Book Description
Author: P.J. Olney
Publisher: Springer Science & Business Media
ISBN: 9401107211
Category : Nature
Languages : en
Pages : 560
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Past progress and future challenges R.J. Wheater Royal Zoological Society of Scotland, Edinburgh, UK. In the past two decades much has been achieved in the sphere of breeding endangered species, and we should be pleased that our co operative efforts have already borne so much fruit. However, on balance and despite the best efforts of conservationists, the position of wildlife in the wild places where they are best conserved has become worse, often dramatically worse. Before returning to the United Kingdom in 1972, I was in Uganda for 16 years, most of which time was spent as Chief Warden of Murchison Falls National Park. Our main problem was that an over-population of large mammals was having a devastating impact on the habitat. Devas tation was being wrought on woodland areas by the arrival of large numbers of elephants into the sanctuary of the Park, following changes in land use in the areas outside the Park. These changes were in response to the requirements of an ever-expanding human population.
Author:
Publisher:
ISBN:
Category : Competition (Biology)
Languages : en
Pages : 68
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Author: United States. General Accounting Office
Publisher:
ISBN:
Category : Marine mammals
Languages : en
Pages : 18
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Author: David Dudgeon
Publisher: Cambridge University Press
ISBN: 1108882625
Category : Nature
Languages : en
Pages : 517
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Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.
Author: A. K. Sanyal
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 1028
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Author: Glenn R. VanBlaricom
Publisher: Springer Science & Business Media
ISBN: 3642728456
Category : Science
Languages : en
Pages : 261
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The impetus for this volume comes from two sources. The first is scientific: by virtue of a preference for certain large benthic invertebrates as food, sea otters have interesting and significant effects on the structure and dynamics of nearshore communities in the North Pacific. The second is political: be cause of the precarious status of the sea otter population in coastal California, the U.S. Fish and Wildlife Service (USFWS) announced, in June 1984, a proposal to establish a new population of sea otters at San Nicolas Island, off southern California. The proposal is based on the premise that risks of catastrophic losses of sea otters, due to large oil spills, are greatly reduced by distributing the population among two geographically separate locations. The federal laws of the U.S. require that USFWS publish an Environmental Impact Statement (ElS) regarding the proposed translocation of sea otters to San Nicolas Island. The EIS is intended to be an assessment of likely bio logical, social, and economic effects of the proposal. In final form, the EIS has an important role in the decision of federal management authority (in this case, the Secretary of the Interior of the U.S.) to accept or reject the proposal.
Author: Anne Stibbs
Publisher:
ISBN:
Category : Crossword puzzles
Languages : en
Pages : 0
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