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Seasonal Trends and Physico-Chemical Parameters of Lower Anicut Reservoir, India

M. Gayathri, M. Ramasamy


Freshwater environment has a complex system influenced by a variety of physical chemical and biological processes. One of the basic goals of ecology is to understand the factors that play a role in the distribution pattern of organisms. In aquaculture the quality of water is one of the most important factors. Hydrographical parameters such as rainfall, temperature, electrical conductivity, salinity, dissolved oxygen determine the distribution and survival of the animals in freshwater environments. The organism exhibit habitat adaptations are imperative for the survival. Adverse environmental parameters can directly or indirectly affect the growth of culture species. The diversity, abundance and dominance of shell fishes indicate well established balanced ecosystem for supporting a complex food web exists in this basin. It was observed that the appreciable seasonal changes of their populations may be correlated with the appearance and disappearance of macro vegetations of the habitat. They form an important component of the food chain for the higher animal taxonomy transferring energy and matter from phytoplankton, macrophytes, and zooplankton to fishes, amphibians, reptiles, birds and mammals and other form of wild life.

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