Carbon : Nitrogen Ratio as a Control Elements in Shrimp Farming Systems

By : A. Anix Vivek Santhiya , Henry Rajadinesh

Page No: 193-201

Abstract
Aquaculture systems today have expanded large enough to have significant impact on environment, such as pond culture and cage culture systems produce a lot of wastewater by huge nutrient loading to the environment which might be a source of water pollution. The main obstacles in developing intensive shrimp culture is waste of shrimp farms which is detrimental to environment. Mitigating the environmental impacts of effluent discharge, shrimp culture should be implemented in closed system with limited water exchange. However, the major problem associated with limited water exchange system is the rapid deterioration in pond, resulting from increasing concentration ammonia and nitrite. The high concentrations of ammonia, nitrite and nitrate are toxic to shrimp and cause high mortality. The addition of carbon materials such as molasses into shrimp culture with manipulating the carbon: nitrogen ratio level is one of the best strategies of controlling ammonia and nitrite in shrimp culture with Limited Water Exchange Model (LWEM). The current study is therefore undertaken in a detailed review to highlight the important of carbon : nitrogen ratio levels on water quality and shrimp production in aquaculture systems.

Authors :
A. Anix Vivek Santhiya and Henry Rajadinesh
Fisheries College and Research Institute, Tamil Nadu Fisheries University, Thoothukudi-628 008, Tamil Nadu, India.