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Author : M. van der Knaap
Publisher : Food & Agriculture Org.
Page : 124 pages
File Size : 40,6 Mb
Release : 1994
Category : Technology & Engineering
ISBN : 9251035814
Author : R. C. M. Crul,F. C. Roest
Publisher : Food & Agriculture Org.
Page : 144 pages
File Size : 43,5 Mb
Release : 1995
Category : Nature
ISBN : 9251036837
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
Page : 180 pages
File Size : 41,8 Mb
Release : 2001
Category : Business & Economics
ISBN : 9251046948
The importance of free longitudinal passage of river fauna is stressed.
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
Page : 64 pages
File Size : 50,6 Mb
Release : 2018-11-08
Category : Nature
ISBN : 9789251092194
Drylands cover more than half sub-Saharan Africa and are home to nearly 50 percent of the region's people. This review documents resilience to climatic variability of fish resources in the sub-Saharan drylands. It also examines the potential for increasing their supply through improved use of available bodies of water, especially small reservoirs.
Author : José Aguilar-Manjarrez,Shree S. Nath
Publisher : Food & Agriculture Org.
Page : 196 pages
File Size : 55,8 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 : OECD
Publisher : OECD Publishing
Page : 164 pages
File Size : 42,7 Mb
Release : 2018-04-10
Category : Electronic
ISBN : 9789264289628
Focused on a specific case of the Shardara MPWI located in Low Syr-Darya Basin, South Kazakhstan and the Kyzyl-Orda oblasts (provinces) of Kazakhstan, this report looks at the choice and design of MPWI investment strategies that ensure a high economic return on investments and potential bankability.
Author : Anonim
Publisher : Academic Press
Page : 2589 pages
File Size : 54,6 Mb
Release : 2009-01-13
Category : Science
ISBN : 9780123706263
Inland aquatic habitats occur world-wide at all scales from marshes, swamps and temporary puddles, to ponds, lakes and inland seas; from streams and creeks to rolling rivers. Vital for biological diversity, ecosystem function and as resources for human life, commerce and leisure, inland waters are a vital component of life on Earth. The Encyclopedia of Inland Waters describes and explains all the basic features of the subject, from water chemistry and physics, to the biology of aquatic creatures and the complex function and balance of aquatic ecosystems of varying size and complexity. Used and abused as an essential resource, it is vital that we understand and manage them as much as we appreciate and enjoy them. This extraordinary reference brings together the very best research to provide the basic and advanced information necessary for scientists to understand these ecosystems – and for water resource managers and consultants to manage and protect them for future generations. Encyclopedic reference to Limnology - a key core subject in ecology taught as a specialist course in universitiesOver 240 topic related articles cover the field Gene Likens is a renowned limnologist and conservationist, Emeritus Director of the Institute of Ecosystems Research, elected member of the American Philosophical Society and recipient of the 2001 National Medal of Science Subject Section Editors and authors include the very best research workers in the field
Author : Penelope Campbell
Publisher : Transaction Publishers
Page : 247 pages
File Size : 45,5 Mb
Release : 2013-11-01
Category : Social Science
ISBN : 9781412852548
Africare is a US-based non-profit organization specializing in development aid for Africa. It is also the oldest and largest African-American led organization in the development field. Since its founding in 1970, Africare has delivered more than $710 million in assistance through over 2,500 projects to thirty-six African countries. The organization employs over 1,000 people, largely indigenous to the countries affected. This is a study in leadership and competing African and American black interests. Africare has sought to become the leading voice speaking on Africa within the US, a goal more difficult to attain than becoming the premier NGO in Africa. Sources of opinion and channels of expression about American policy in Africa are fragmented. They do not have name recognition or influential sponsors. There is poor coverage of African affairs in the US, except for key, often tragic, events. Africare has a heritage and has filled a niche in American society. Penelope Campbell argues that unless the organization reclaims these unique assets, it may lose the distinctiveness enabling its survival. The challenge for Africare is spreading its story and message. The author raises disturbing fundamental issues. Has foreign aid become such an industry that the patient is not allowed to get well? As the military cannot afford peace, it seems the world cannot afford the cessation of poverty. Campbell argues that success in Africa has been elusive not because of the failures of development organizations, but the magnitude of the issues involved. The author presents a convincing case for aid to Africa, the pitfalls involved, and for Africare's potential as a leader in meeting the continent's needs.
Author : Anonim
Publisher : Unknown
Page : 628 pages
File Size : 43,8 Mb
Release : 2001
Category : Fisheries
ISBN : UOM:39015055723186
Author : A. G. Coche,Jean Collins
Publisher : Unknown
Page : 100 pages
File Size : 40,7 Mb
Release : 1997
Category : Aquaculture
ISBN : STANFORD:36105021155036
Author : Food and Agriculture Organization of the United Nations. Committee for Inland Fisheries of Africa
Publisher : Unknown
Page : 492 pages
File Size : 41,7 Mb
Release : 1994
Category : Fisheries
ISBN : UOM:39015053986512
Author : Anonim
Publisher : Unknown
Page : 548 pages
File Size : 51,6 Mb
Release : 1997
Category : Fish culture
ISBN : UCSD:31822009116641
Author : Food and Agriculture Organization of the United Nations
Publisher : Unknown
Page : 328 pages
File Size : 55,6 Mb
Release : 1999
Category : Agriculture
ISBN : UOM:39015086925362
Author : H. W. van der Mheen
Publisher : Unknown
Page : 396 pages
File Size : 48,5 Mb
Release : 1972
Category : Fish stocking
ISBN : UIUC:30112083831286
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
Page : 128 pages
File Size : 46,8 Mb
Release : 2019-02-01
Category : Technology & Engineering
ISBN : 9789251308134
Small pelagic fish species found in lakes and introduced to reservoirs dominate by volume and contribute some of the most important inland fisheries in Africa with steadily increasing catches and additional potential. This circular reviews the status and importance of the pelagic fish and fisheries, together with small fish in general, for sustainable and healthy livelihoods in Africa. It reviews the biology and biological production of the most important pelagic species in lakes and reservoirs as well as the impacts of environmental and climatic variation on the stocks of these species. It examines and discuss the various capture techniques together with potential of improvements in the fisheries and associated processing and national and regional trade within Africa. The knowledge generated by the circular will be useful for policy makers and development practitioners to design and implement more effective policies, strategies and programs that will contribute to reducing the food insecurity and conflicts that currently affect the people in sub-Saharan Africa.
