Filters in a recirculation aquaculture system (RAS)
Circular tank for intensive aquaculture

Aquaculture, fishery technics

The field of work “aquaculture, fisheries technology” deals with issues related to modern process and equipment technology, including the biotechnical requirements and the business management aspects. This particularly involves the production of trout at fish farms, the intensive carp- and warm water fish production. The types of production treated here are open, partly closed and closed recirculation systems, pond-in-pond systems and net cages in lakes.

Trends of some important water parameters

One particularly crucial issue at the moment involves drawing up and introducing new water-saving or low-emission or emission-free system technologies for trout production. At the same time, the ideas need to guarantee the best possible conditions for keeping the fish, maintain short working hours and provide an economically viable operating system. In addition to opportunities for introducing the relevant process technologies and adapted types of fish farming, the input, output and revenue parameters for the fish have to be drawn up or improved in production conditions in order to be able to model and predict the process and biotechnological procedures based on these conditions.

Juvenile whitefish
This field of work also deals with issues related to developing fish stocks and using fish from artificially created aquatic environments. This particularly involves the many open cast mining lakes that cover significant areas of the German states of Brandenburg, Saxony-Anhalt and Saxony. Surveys for the individual lakes take into account the living conditions for fish and are used to derive the guiding principle for fisheries-related work and the fish habitat and prepare the necessary fisheries-related measures to establish fish stocks suitable for the lake or river and their future use.

Problems related to the technique used to catch the fish, particularly electrofishing, are also a major focal point. In the light of the major significance attached to this process when assessing fish stocks as part of the EU’s Water Framework Directive and the Habitats Directive, increased attention has to be paid to the issues of standardising capture processes and ensuring that the capture technology works properly.