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Author: J.-P. vanden Bossche
Publisher: Food & Agriculture Org.
ISBN: 9789251029831
Category : Technology & Engineering
Languages : en
Pages : 432
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Book Description
Author: J.-P. vanden Bossche
Publisher: Food & Agriculture Org.
ISBN: 9789251029831
Category : Technology & Engineering
Languages : en
Pages : 432
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Book Description
Author: Jeff Jenness
Publisher: Food & Agriculture Org.
ISBN: 9789251057407
Category : Business & Economics
Languages : en
Pages : 188
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Book Description
The African Water Resource Database (AWRD) is a set of data and custom-designed tools, combined in a geographic information system (GIS) analytical framework, aimed at facilitating responsible inland aquatic resource management with a focus on inland fisheries and aquaculture. It thus provides a valuable instrument to promote food security. The AWRD data archive includes an extensive collection of datasets covering the African continent, including: surface waterbodies, watersheds, aquatic species, rivers, political boundaries, population density, soils, satellite imagery and many other physiographic and climatological data. This technical paper is the first of two publications about the AWRD, and it gives a general overview addressed both to administrators and managers, as well as for professionals in technical fields. The second part of this technical paper is available separately (ISBN 9789251056479).
Author: J.-P. vanden Bossche
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 762
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Book Description
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251307938
Category : Technology & Engineering
Languages : en
Pages : 399
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Book Description
The FAO Fishery and Aquaculture Circular C942 Revision 3 (C942 Rev. 3) updates and expands the scope of previous revisions of the circular. C942 Rev. 3 is an important baseline document, intended to assist in the global understanding of inland fisheries and inform dialogue on their current and future role. The third revision reviews the status and trends of inland fisheries catch at global, continental and subcontinental levels. It places inland capture fisheries in the context of overall global fish production, and calls attention to the importance of inland capture fisheries with respect to food security and nutrition and the Sustainable Development Goals. It quantifies global inland fisheries resources in terms of food production, nutrition, employment, economic contribution with respect to those countries/regions or subnational areas where they are important. A characterization approach to distinguish large-scale and small-scale fishing operations and their relative contributions is provided. The review provides estimated economic values of inland fisheries, as well as a valuation of potential replacement cost of these (in terms of dollars, other resources such as land and water, feeds). There is also an analysis of the extent and economic value of recreational inland fisheries. The contribution to employment and the gender differences related to this are quantified. The linkages between inland fisheries and biodiversity are also explored. C942 Rev. 3 discusses ways to measure and assess inland fisheries, in particular, how to establish more accurately inland fishery catches in the many situations where there are challenges to collection of catch statistics.
Author: José Aguilar-Manjarrez
Publisher: Food & Agriculture Org.
ISBN: 9789251041390
Category : Business & Economics
Languages : en
Pages : 196
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Book Description
"(Reprint. First published in 1998) The present study is an update of an earlier assessment of warm-water fish farming potential in Africa, by Kapetsky (1994). The objective of this study was to assess locations and areal expanses that have potential for warm-water and temperate-water fish farming in continental Africa. The study was based on previous estimates for Africa by the above author, and on estimates of potential for warm-water and temperate-water fish farming in Latin America by Kapetsky and Nath (1997). However, a number of refinements have been made. The most important refinement was that new data allowed a sevenfold increase in resolution over that used in the previous Africa study, and a twofold increase over that of Latin America (i.e. to 3 arc minutes, equivalent to 5 km x 5 km grids at the equator), making the present results more usable in order to assess fish farming potential at the national level. A geographical information system (GIS) was used to evaluate each grid cell on the basis of several land-quality factors important for fish-farm development and operation regardless of the fish species used. Protected areas, large inland water bodies and major cities were identified as constraint areas, and were excluded from any fish farming development altogether. Small-scale fish farming potential was assessed on the basis of four factors: water requirement from ponds due to evaporation and seepage, soil and terrain suitability for pond construction based on a variety of soil attributes and slopes, availability of livestock wastes and agricultural by-products as feed inputs based on manure and crop potential, and farm-gate sales as a function of population density. For commercial farming, an urban market potential criterion was added based on population size of urban centres and travel time proximity. Both small-scale and commercial models were developed by weighting the above factors using a multi-criteria decision-making procedure. A bioenergetics model was incorporated into the GIS to predict, for the first time, fish yields across Africa. A gridded water temperature data set was used as input to a bioenergetics model to predict number of crops per year for the following three species: Nile tilapia (Oreochromis niloticus), African catfish (Clarias gariepinus) and Common carp (Cyprinus carpio). Similar analytical approaches to those by Kapetsky and Nath (1997) were followed in the yield estimation. However, different specifications were used for small-scale and commercial farming scenarios in order to reflect the types of culture practices found in Africa. Moreover, the fish growth simulation model, documented in Kapetsky and Nath (1997), was refined to enable consideration of feed quality and high fish biomass in ponds. The small-scale and commercial models derived from the land-quality evaluation were combined with the yield potential of each grid cell for each of the three fish species to show the coincidence of each land-quality suitability class with a range of yield potentials. Finally, the land quality-fish yield potential combinations were put together to show where the fish farming potential coincided for the three fish species."
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 925131098X
Category : Technology & Engineering
Languages : en
Pages : 47
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Book Description
The two and a half day Advisory Roundtable was convened to contribute to FAO’s response to the request by the 32nd Session of the Committee on Fisheries (COFI), to advise FAO on its approach to developing a more comprehensive report on methods and data and analytical approach, which could be used to provide a credible, objective and replicable assessment of inland fisheries; and ii) provide guidance on tools that could be provided to member states seeking advice with respect to assessing the status of their inland fisheries (yield/production, threats & drivers), predicting future impacts and how to quantify the effect of mitigation/adaptation measures on fisheries. The roundtable reviewed and discussed the background that had led up to the meeting to scrutinize the purpose of an assessment and the scope of coverage and how this could be used to determine the status of inland fisheries. It further developed the criteria to conduct such an assessment, and then attempted to apply the approach to a number of basins. This practical exercise was based on concrete examples from countries or basins with which the experts were familiar. It was concluded by the roundtable, that the use of a dual index approach is the right way to go, and that it can be used to assess fisheries both at the national, basin, regional and global levels although different levels of resolution will be required and may thus have somewhat different data requirements. Adding a valuation element will direct investment towards the fisheries that provides most benefit to society in the context of the priorities set at the national level. At the national level, data may include yields, catches, threats, and measures that can be used to estimate future adaptive capacity. For global level analysis an index approach will be necessary relying on “big” data. Any information system should be useful to serve, first and foremost, the countries that collect/analyse and provide the data. Reports to FAO that could be compiled into a global picture of the state of inland fisheries would be a value added product of this process. The national reports would also have utility in reporting on progress towards the Sustainable Development Goals/Aichi Targets.
Author: M. van der Knaap
Publisher: Food & Agriculture Org.
ISBN: 9789251035818
Category : Technology & Engineering
Languages : en
Pages : 124
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Book Description
Author: Jeff Jenness
Publisher: Food & Agriculture Org.
ISBN: 9789251056479
Category : Business & Economics
Languages : en
Pages : 332
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Book Description
The African Water Resource Database (AWRD) is a set of data and custom-designed tools, combined in a geographic information system (GIS) analytical framework, aimed at facilitating responsible inland aquatic resource management with a focus on inland fisheries and aquaculture. It thus provides a valuable instrument to promote food security. The AWRD data archive includes an extensive collection of datasets covering the African continent, including: surface waterbodies, watersheds, aquatic species, rivers, political boundaries, population density, soils, satellite imagery and many other physiographic and climatological data. This technical paper is the second of two publications about the AWRD, and it includes a technical manual for spatial analysts and a workbook for university students and teachers. The first part of this technical paper is available separately (ISBN 9789251057407).
Author: P. Hart
Publisher: Springer Science & Business Media
ISBN: 9401105634
Category : Science
Languages : en
Pages : 610
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Book Description
The African lakes are an extremely important ecosystem and the subject of much study relating to species introductions and loss of biodiversity. This book provides a thorough review of the whole subject and will be of great interest to fish biologists, fisheries workers, ecologists, environmental scientists and conservationists.
Author: B. E. Marshall
Publisher: Food & Agriculture Org.
ISBN: 9789251036471
Category : Nature
Languages : en
Pages : 80
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Book Description
