Abstract
Three artificially compounded diets (purified diet, compound feed, and crab protein crustacean reference diet) and several fresh diets were tested under laboratory conditions in an attempt to improve survival and growth rates of juvenile freshwater crayfish ( Pacifastacus leniusculus). The highest survival obtained was 44.44% after 80 days of test. Fresh aquatic plant material, when added to artificially compouned diets, improved growth and slightly increased survival, and the animals became more pigmented. Juveniles held singly, rather than in groups, achieved higher survival rates. The results with juvenile P. leniusculus have been related to those obtained in research with other crustaceans.
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