Along with larval feeds, Dutch company Catvis and its Greek subsidiary Catvis Hellas supply a range of equipment for hatcheries. Catvis makes its own motor-driven feeders and handles the Christian Jorgensen (CJ) feeders from Denmark. "With our experience in the design and construction of many types of farms, we can select the most suitable equipment for hatchery work, with a keen eye on economics as well as technical efficiency, " said managing director Peter Lodder. Improved culture techniques, intensification and water quality issues all need additional attention. "The increased usage of dry diets also requires the input of proper equipment to ensure the best possible water quality conditions. "Even today, oxygen is an often underestimated limiting factor in quite a few hatcheries, although the technology is there to keep it at optimal levels. "Other aspects include treatment of intake water, for which we have excellent mechanical filters and UV sterilisers; control of temperature; and treatment of discharge waters." Mr Lodder said that larval feeds from Catvis are being used in more and more hatcheries. "The range begins with Feeding Rich for boosting egg quality through broodstock feed enrichment; then Micro Control is used to disinfect eggs and (and Artemia nauplii). "After first feeding on rotifers (cultured on Sanders Rich and yeast and enriched with Sanders Rich Advanced) and the Sanders Artemia enriched with Sanders Rich), the Nippai ML-Powered and Initial diets 1/2/3 come in and are used consequently. "When finishing off with the Nippai Juvenile 1 diet to further enhance growth, the hatchery operator will be sure that his fry has the best possible nutrition."
(excerpt from Fish Farming International, December 1996)
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