Author: Didier PaugyPublisher:
ISBN:
Category : Freshwater fishes
Languages : en
Pages : 848
Book Description
Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'ouest
Author: Didier PaugyPublisher:
ISBN:
Category : Freshwater fishes
Languages : en
Pages : 848
Book Description
Les Livres de L'année
Author: Annales
Author: Ecological Studies in Tropical Fish Communities
Author: Ro McConnellPublisher: Cambridge University Press
ISBN: 9780521280648
Category : Nature
Languages : en
Pages : 404
Book Description
The result of compiling widely scattered research on fish in tropical rivers, lakes and seas. A comprehensive overview of the ecology of fish communities in freshwater as well as marine environments.
Fresh and brackish water fishes of Lower Guinea, West-Central Africa
Author: Melanie L. J. StiassnyPublisher: IRD Editions
ISBN: 9782709916202
Category : Brackish water fishes
Languages : en
Pages : 808
Book Description
Source Book for the Inland Fishery Resources of Africa
Author: J.-P. vanden BosschePublisher: Food & Agriculture Org.
ISBN: 9789251029831
Category : Technology & Engineering
Languages : en
Pages : 432
Book Description
International Catalogue of Scientific Literature, 1901-1914
Author: International Catalogue of Scientific Literature
Author: African Study Monographs
Author: A Strategic Reassessment of Fish Farming Potential in Africa
Author: José Aguilar-ManjarrezPublisher: Food & Agriculture Org.
ISBN: 9789251041390
Category : Business & Economics
Languages : en
Pages : 196
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."