Effect of dietary protein, lipid and carbohydrate content on the growth, feed efficiency and carcass composition of striped bass, Morone saxatilis (Walbaum), fingerlings |
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Authors: | A. BERGER J. E. HALVER |
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Affiliation: | School of Fisheries, University of Washington, Seattle, Washington, USA |
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Abstract: | Abstract. Two 6-week experiments were conducted with age-0 striped bass, Morone saxatilis (Walbaum). In the first experiment, fish were fed isocaloric diets that contained 20–65% protein. In the second experiment, fish were fed isonitrogenous diets (42–46% protein) that contained 6–29% dextrin or 8–25% cod liver oil. Maximum weight gain, feed efficiency and protein efficiency ratio were achieved with a 52% protein diet. Net protein utilization was inversely related to dietary protein concentration. In the second experiment, maximum growth was achieved with a 33% carbohydrate diet (based on nitrogen free extract); and with a 17% lipid diet (based on ether extract). Increasing dietary lipid beyond 17% resulted in growth depression. No negative impacts on carcass composition as a result of increasing dietary dextrin or lipid were judged to have occurred. |
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