Call edition 2012
A new edition of the Prize of the Belgian Development Cooperation has been launched. This call is open until March 31st, 2011. You can read in the regulations whether you comply with the criteria for participation.
Production of food by aquaculture, such as the cultivation of fish, shrimps, molluscs, etc, has been constantly growing. In recent years there has been an increased interest in the cultivation of new species all over the world. Research on the biology and food requirements of these new species must go together with the study of their natural environment and food.
Plankton comprises the base of the food chain in marine and freshwater environments.
It is not surprising, therefore, that plankton is an indispensable food source in the commercial culture of many cultivated species like fish and shrimp.
The larvae of most cultivated species must, at least for a short time, be fed with plankton. Their natural diet consists of a wide diversity of phytoplankton and zooplankton found in great abundance in the natural waters. This abundance and maximal diversity of food organisms of different sizes and nutritional composition provide maximal chances for meeting all the requirements for a good growth of the predator larvae.
For aquaculture, suitable plankton need to be selected on the basis of their mass-culture potential, size, digestibility, and overall food value for the feeding larvae.
For example, the size of the prey is important and should increase as the cultured larvae grow.
In this study eight lakes of the flood plain of the Mamoré river in Bolivia were surveyed during one hydrological cycle (October ’97 – October ’98). The aim of the study was to describe the spatial and temporal variations that occurred in the composition of zooplankton and to determine whether the main physical-chemical parameters could explain these variations.
We can conclude that the evaluation of the richness of the aquatic environment requires an in-depth study and is very important for the further development of aquaculture.
report by Prof. Dr. Patrick Sorgeloos, Laboratory of Aquaculture & Artemia Reference Center, Universiteit Gent, Belgium