Author: Ian G. Cowx
Publisher: John Wiley & Sons
ISBN: 0470695277
Category : Technology & Engineering
Languages : en
Pages : 458
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Book Description
In this edited work, international experts in fisheries management and ecology review and appraise the status of river fisheries, assessment methodology, constraints on development, issues and options regarding management and associated problems in both temperate and tropical countries. Recommendations are made to improve management and an attempt is made to provide guidelines for formulating policy, for planning methodology and for evaluating future activities. Assessment of fish community structure and dynamics. Factors constraining stock recruitment. Fish habitat requirements. Instream flow needs. Impact of water resource schemes. Rehabilitation of river fisheries. Enhancement of fish stocks. Exploitation of stocks. Management of migratory fish stocks. Conservation of endangered species. Integrated river management. Bioeconomic issues. Legislation. Multinational management of rivers. Case studies.
Author: Thayer Scudder
Publisher: Food & Agriculture Org.
ISBN: 9789251022887
Category : Technology & Engineering
Languages : en
Pages : 100
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Book Description
This paper is concerned specifically with the problems of river fisheries and associated management issues. It deals in particular with the scope for building on traditional practices, through the participation of traditional fishing communities, as a means of improving the quality of river fishery management. The paper reviews the most frequently encountered problems of riverine fisheries such as over-fishing due to population pressure or migration, and artifically induced environmental factors such as dams, pollution and deforestation. It lays stress on the importance of studying fishing communities, as well as strictly biological factors, and presents a four-stage analysis of the evolution of traditional riverine fisheries. Several undesirable consequences of this typical evolution, both on the resource itself and on traditional fishing communities, are identified and illustrated by case studies from the Amazon and the Zambesi. Certain types of traditional management strategies are examined and assessed for their future utility. The current ineffectiveness of many existing government river fisheries management policies is noted, either as a result of lack of resources or because they are inappropriate, often rooted in outdated colonial legislation. The lack of both limited access measures and of participation by local fishing communities are highlighted as major deficiencies. The paper concludes by linking these two features as crucial components of durable river management strategies for the future, although other possibilities for management are also reviewed and assessed. The paper contains a comprehensive bibliography for further reading.
Author: Christopher C. Kohler
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 760
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Book Description
"The book covers fishery assessments, habitat and community manipulations, and common practices for managing stream, river, lake, and anadromous fisheries. Chapters on history; ecosystem management; management processes; communications with the public; introduced, undesirable, and endangered species; and the legal and regulatory frameworks provide the context for modern fisheries management." From fisheries.org.
Author: Food and Agriculture Organization of the United Nations
Publisher: Bernan Press(PA)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 72
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Book Description
Little attention has been paid to rivers and it is only recently that a general awareness has developed of the importance of river systems to fisheries throughout the world. While rivers were relatively unaltered, the fish they produced was taken for granted, but with increasing competition for water for agricultural, industrial and domestic uses, fisheries usually have been given a secondary role among the range of users. The river systems themselves are being increasingly modified both in their form and in their flood characteristics. As a consequence, fish populations are being altered and productive capacities lowered. FAO is now called upon to advise countries on the ways in which such fisheries can be managed, both on their own and in harmony with such activities as irrigation, flood control or power generation. In trying to fulfil this task, we are limited by the comparative lack of knowledge about the systems under consideration. A meeting of experts was convened in an attempt to define the methodologies for the assessment of fishery resources in rivers and the use of these methodologies in evaluating the impacts of fisheries and other uses of the aquatic environment on the fishery.
Author: P. A. van Zwieten
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN: 9789251067413
Category : Technology & Engineering
Languages : en
Pages : 168
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Book Description
A considerable quantity of data and information were collected on many aspects of the systems of the three reservoirs, including hydrological, biophysical and limnological features, primary production, and fish and fisheries data. This information was condensed and synthesized with the aim of providing a baseline against which the ecological changes that have taken place since impoundment can be described and analysed. Efforts are made to explain changes in fish catch in relation to climatic variations, ecological succession and fishing effort. The review shows that biological data and information are generally available. However, as is also common elsewhere, all three cases suffer from the general tendency to isolate and compartmentalize research into separate disciplines.
Author: Norman Gustaf Benson
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 36
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Book Description
Research to appraise current fish management practices and to develop improved practices was carried on in the Yellowstone National Park portion of the Madison River system from 1953 to 1957. The physical, chemical and biological characteristics of the Firehole, Gibbon and Madison Rivers are described. Experiements designed to test the value of fingerling and adult stocking resulted in the conclusion that fingerling stocking of brown and rainbow trout does not contribute to the fishery substantially and that adult stocking is of greatest value only in the season of stocking. Examination of scales showed that hatchery fish are readily distinguishable from wild fish. There were no differences in growth rates of wild fish in different years for different rates of stocking of hatchery fish. The brown and rainbow trout populatons are not affected adversely by heavy introduction of hatchery fingerlings of each species or of adult rainbows. Brook and brown trout and whitefish are substantially underfished.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 65
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Book Description
Author: United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries Management
Publisher:
ISBN:
Category : Administrative agencies
Languages : en
Pages : 108
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Book Description
Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 344
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Book Description
Author: Columbia Basin Inter-Agency Committee. Fishery Steering Committee
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 364
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Book Description
