Dietary calcium and phosphorus requirements of Oreochromis aureus reared in calcium-free water |
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| Affiliation: | 1. Departamento de Ecología y Biología Animal, Facultad de Biología, Campus As Lagoas – Marcosende, Universidad de Vigo, 36310 Vigo, Spain;2. ECIMAT - Estación de Ciencias Mariñas de Toralla, Illa de Toralla, 36331 Vigo, Spain;3. Centre of Marine Sciences (CCMAR), University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal;4. Centre for Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal;5. Department of Biomedical Sciences and Medicine, University of Algarve, 8005-139 Faro, Portugal;1. Sumy National Agrarian University, Faculty of Food Technology, H, Kondratieva st, 40021, Sumy, Ukraine;2. School of Food Science and Technology, Henan Institute of Science and Technology, Xinxiang, Henan, 453003, PR China;3. College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, Henan, 453003, PR China;1. Nestlé Research Center, Vers-chez-les-Blanc, 1000 Lausanne 26, Switzerland;2. Department of Health and Nutrition Sciences, College of Education and Human Services, Montclair State University, 1 Normal Avenue, Montclair, NJ 07043-1619, USA;3. Nestlé Purina PetCare Company, 1 Checkerboard Square-3s, St. Louis, MO 63164-0001, USA;4. Department of Food Science & Technology, College of Agricultural and Environmental Sciences, The University of Georgia, 100 Cedar Street, Athens, GA 30602-2610, USA |
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| Abstract: | ![]()
Two experiments were conducted to evaluate the dietary calcium and phosphorus requirements of fingerling Oreochromis aureus reared in calcium-free water. A casein basal diet was supplemented with graded levels of either calcium or phosphorus and fed for 12 weeks. Dietary calcium concentrations ranged from 0.17 to 1.00% and dietary phosphorus concentrations ranged from 0.20 to 1.00%. Weight gain and feed conversion data indicated that 0.70% dietary calcium was optimum for good growth. Whole-body, bone or scale minerals did not clearly reflect the calcium requirement as established by growth. Weight gain and feed conversion data indicated that 0.30% dietary phosphorus was adequate for good growth. However, bone ash, phosphorus, and calcium data indicated that 0.50% dietary phosphorus was required for normal bone mineralization. |
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