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Author : R. C. M. Crul
Publisher : Unknown
Page : 21 pages
File Size : 50,8 Mb
Release : 1992
Category : Fisheries
ISBN : 0119410958
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
Page : 47 pages
File Size : 50,6 Mb
Release : 2018-11-23
Category : Technology & Engineering
ISBN : 9789251310984
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 : J.-P. vanden Bossche,G. M. Bernacsek
Publisher : Food & Agriculture Org.
Page : 432 pages
File Size : 44,6 Mb
Release : 1990
Category : Technology & Engineering
ISBN : 9251029830
Author : José Aguilar-Manjarrez,Shree S. Nath
Publisher : Food & Agriculture Org.
Page : 196 pages
File Size : 42,7 Mb
Release : 1998
Category : Business & Economics
ISBN : 9251041393
"(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 : J.-P. vanden Bossche,G. M. Bernacsek
Publisher : Food & Agriculture Org.
Page : 436 pages
File Size : 48,8 Mb
Release : 1990
Category : Fisheries
ISBN : UCSD:31822007451453
Author : Anonim
Publisher : Unknown
Page : 48 pages
File Size : 41,8 Mb
Release : 1991
Category : FIPPDAT (Computer system)
ISBN : UOM:39015033996383
Author : SADC Inland Fisheries Sector
Publisher : Sadc Inland Fisheries Sector Technical Coordination Unit
Page : 44 pages
File Size : 46,7 Mb
Release : 1997
Category : Nature
ISBN : IND:30000061199380
Author : Food and Agriculture Organization of the United Nations. Committee for Inland Fisheries of Africa
Publisher : Unknown
Page : 202 pages
File Size : 55,8 Mb
Release : 1972
Category : Fish-culture
ISBN : UOM:39015046513043
Author : Food and Agriculture Organization of the United Nations. Committee for Inland Fisheries of Africa
Publisher : Unknown
Page : 200 pages
File Size : 42,6 Mb
Release : 1972
Category : Fisheries
ISBN : UOM:39015063429503
Author : A. G. Coche,Jean Collins
Publisher : Unknown
Page : 100 pages
File Size : 50,7 Mb
Release : 1997
Category : Aquaculture
ISBN : STANFORD:36105021155036
Author : Food and Agriculture Organization of the United Nations
Publisher : Unknown
Page : 292 pages
File Size : 49,5 Mb
Release : 1995
Category : Agriculture
ISBN : PSU:000024686723
Author : R. C. M. Crul,Food and Agriculture Organization of the United Nations
Publisher : Unknown
Page : 36 pages
File Size : 42,7 Mb
Release : 1992
Category : Fish populations
ISBN : UVA:35007002451189
Author : Anonim
Publisher : Unknown
Page : 862 pages
File Size : 43,8 Mb
Release : 1993
Category : Agriculture
ISBN : CORNELL:31924063063246
Author : R. C. M. Crul
Publisher : Unesco
Page : 116 pages
File Size : 54,6 Mb
Release : 1997
Category : Science
ISBN : UCSD:31822025749946
Lakes Tanganyika and Malawi are major sources of fish protein, reservoirs of fresh water and important avenues of transporation. Their biodiversity and unique wildlife give them a high scientific value. This book provides background on important physical, chemical and biological events occurring in these lakes that will be of interest to those involved in the management of African inland waters.
Author : Anonim
Publisher : Unknown
Page : 556 pages
File Size : 42,6 Mb
Release : 1993
Category : Agriculture
ISBN : STANFORD:36105117898465
