The research area is situated in district Nellore, about 150-200 km in the north of Madras on the Gulf of Bengal. In the following figure one can see that rainy season will last all of the project time.
Rainy season is the most important growing season of shrimp farming.
The Penaeus monodon and Penaeus indicus are the main species bred in aquacultural farms. One river of first order should be analysed from the spring to the estuary. Rivers of second order will be analysed at their mouth. Water and water-ground analyses will be conducted, too. During their growth oysters are forming strong marked zones of increase in their shells.