Continued evolution: Polyculture in Bangladesh

Traditional culture of native carps in Bangladesh has been diversified by the polyculture of introduced carps with tila­pia and catfish. Production is becoming increasingly intensive, with an accompanying need for greater feed and other inputs. The culture of Thai pangas has expanded more rapidly than tilapia farming because pangas carry less risk and also provide a quick return. 

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Automated temperature-controlled recirculation systems
Automated temperature-controlled recirculation systems

Automated temperature-controlled recirculation systems

A temperature-control system with a central chiller was found to enhance chilling and research capacity over a system with multiple unit chillers because replicating experiments in a single process control system minimized variations in the temperatures and chilling rates in the individual tanks. Temperature-holding experiments found slight differences at different temperature levels.