FRESHWATER CRAYFISH | 1975| vol. 2| Research Article
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Full Citation: MEYERS, S.P. (1975). Development of water-stable diets for larval and postlarval Crustacea. Freshwater Crayfish 2: 147.
A variety of techniques and materials are available for formulation of nutritionally-acceptable food delivery “systems” for crustacea at various stages of their development and feeding characteristics. Extrusion methodology permits ready production of maintenance and experimental test diets on an economically-sound laboratory or production scale. Water stability, up to 48 hours, of extruded grow-out diets, has been achieved, using alginates as binding vehicles. Stability properties are affected by type and concentration of alginate used, composition of the diet and presence and level of sequestrant. Rehydration properties of the final extruded material can be effectively regulated by selection of proper hydrocolloid or combinations thereof. Systems for production of diets for larval and post larval animals have included use of flake-type material as well as capsulation techniques. The latter, involving use of micro-capsules, permit more rigid controlled delivery of nutrients and compounds wherein maximal attention can be given to analysis of species nutritional requirements and response to specific metabolites. Artificial food systems, incorporating use of proper delivery vehicles, offer a range of alternatives to existing feed dispersing mechanisms and provide the crustacean experimentalist with means for more definite analytical analyses.
Article Language: English
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