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Food for demanding baby fish
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Published August 8, 2005

Cod and halibut fry demand live food, so we are developing good, reasonably priced feeds. Algae and zooplankton top the menu for these fry, and we are ensuring that they get enough of such species, partly by improving production technology.

This involves giving producers complete control of production and of how the larvae are fed, via process control and automation.

Producing cod and halibut requires large quantities of rotifers, so we have developed a “marine greenhouse”; a new production system that cultivates plankton with the aid of recirculation technology. The system has been tested by a commercial hatchery with great success.

We have also been working for many years on a dry concentrate to replace live feed, and have found that the food particles need to be very small and contain the nutritional components that the fish larvae require. This means choosing raw materials that contain phospholipids and high levels of essential fatty acids.

An interesting marine food raw material consists of micro-organisms with a high content of polyunsaturated fatty acids such as the single-celled Thaustrocytrid family and various marine microalgae.

However, we still need to develop more efficient production, dehydration and processing technology.

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