The ecology of the fish pond ecosystem: with special reference to Africa
An understanding of the ecology of a fish pond is essential for the achievement of steady and high fish production in ponds. For the ecologist, the fish pond is a small laboratory: easy to investigate and responding rapidly to manipulation. For the aquaculturist, the ecology shows the ways and means of interventions ensuring an increase of production. The book deals with the different aspects of natural production within a pond, referring it to African conditions: considering first the role of soil as source and sink of nutrients for the water, then nutrient cycling within water and the fate of fertilizers added to ponds, and finally the contribution of natural productivity to fish production. The important sum of information brought together in this volume is valuable for both aquaculturist and ecologist, who lack a handbook on the ecology of a fish pond. It will capture the interest of African aquaculturists and stimulate aquaculture research on natural production.
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Importance of soil for the productivity of water
Importance of the colloidal properties of a soil
Importance ofpH and redox potential properties
18 other sections not shown
absorption acid activity aerobic alkaline aluminium ammonia ammonium amount anaerobic aquatic autotrophic bacteria benthic biomass blue-green algae Boyd buffer calcium capacity carbon dioxide cations cell chemical chlorophyll cladocerans colloids common carp culture cycling decomposition decrease denitrification density depends depth diatoms dissolved oxygen effect environment enzymes eutrophic excretion factors feed fish ponds fish production grazing growth rate heterotrophic humic important increase inorganic interface ions iron kg ha"1 lakes layer light lime limiting manure maximum microbial microorganisms microzooplankton mineral niloticus nitrate nitrogen fixation nutrient nutrient concentrations organic compounds organic matter organic phosphorus orthophosphate oxide oxygen concentration particles phosphatase phosphate photosynthesis phytoplankton planktivorous plankton pore water predation present primary production processes ratio recycling redox potential reduced regeneration release respiration rotifers sediments silicon silver carp soil soluble sorbed sorption species stocking supply surface temperature tilapia transformation trophic uptake water column water quality zooplankton