THE LIMNOLOGY, PRIMARY PRODUCTION, AND FISH PRODUCTION IN A TROPICAL POND

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Abstract
The productivity of a small tropical temple pond was studied by the light‐and‐dark bottle method and by following the natural changes in carbon dioxide and oxygen. Production varied from 6.0 g C/m2 per day in December 1962 to 11.0 g C/m2 per day in June 1962. The apparent photosynthetic yields were usually greater when the carbon dioxide and oxygen changes in natural waters were used to calculate production. A daytime reduction in methyl orange alkalinity in upper strata and an increase in phenolphthalein alkalinity, attributed to precipitation of carbonate, were significant features of this shallow eutrophic biotope. The dominant plankton community in this pond was of bluegreen algae. Growth of fish was found to be good. There was a conversion of 1.65% of the primary production to fish.