Articles

Evaluation of the potential fish production of ponds

Abstract

Information about the potential production level of a fertilized fishpond are indispensable for its rational management. For fisheries, various methods are existing to correlate fish-biomass and -yield of lakes to their morphometry, physico-chemical and biological parameters. Such methods proved to be inappropriate for the fertilized fish-ponds studied by the authors in France (36 different locations). This can be explained by the peculiarities of such water bodies: strong anthropication, low diversity of the stocked (cultivated) fish species, optimized fertilization. From the data collected by the authors, statistical treatment evidenced links between phytoplankton types, chlorophyll densities and fish production levels. Combining both five typical groups of phytoplankton and five different concentrations of chlorophyll a arranged into a grid, it is possible to determine the potential fish production of the ponds (up to over 500 kg/ha).

Authors


J. BARBE

Country : France


O. SCHLUMBERGER

Country : France


N. BOURETZ

Country : France

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