... accumulates on the pond bottom, they should only be used for a limited period of time. Recommended levels of organic manure are 0.5 to 1. 25 ton.ha -1 at the start of the production season with ... integrated aquaculture. 13 3 -1 41. Proc. International Meeting on “Saltworks Conversion for Aquaculture , Trapani, Italy, May 9 -1 1, 19 86. Tackaert, W. and Sorgeloos, P. 19 91a. Semi-intensive culturing ... Salt production is abandoned during the rainy season, when evaporation ponds are often turned into fish/shrimp ponds. for dilution due to release of water from the cysts. - for a low ratio of...