Bachelor Thesis Candidate Sven Hornbostel (2008)
Effects of the use of wet or dry feed on shrimp cultivation
In open aquaculture one problem could be the an impact on the surrounding environment. Feed and faeces are set free and enrich the water with high loads of nutrients. Further, difficulties come up with the use of medicine or with escapes of the cultured organisms.
One approach to control these problems is the technology of land-based or floating recirculating systems in which the water is fully or partly treated and then reused.
In this thesis, a pond-in-pond system is tested for its use for crustacean cultivation. Three systems in a scaled down design (1:10) were installed in a recirculating system and stocked with shrimps (Litopenaeus vannamei). The system consists of two candidate tanks and one biofilter.
In one tank shrimps are fed with commercial dry feed pellets and in the other with wet feed (polychaetes).
The aim of the bachelor thesis is to determine how fast the candidates will grow. A comparison of the feed conversion ratio of the different feed will be accomplished. Furthermore, the response of the pond-in-pond systems to the different diets will be analysed.
Supervisor:
Prof. Dr. Bela H. Buck (AWI)
Prof. Wilhelm Hagen (University of Bremen)