Influence of Dietary Phosphorus and Zinc Levels on Whole Body Mineral, Liver Mineral, and Liver Vitamin-C Contents of Fingerling Rainbow Trout, <I>Oncorhynchus mykiss</I>

  • MS Alam Sarker School of Agriculture and Rural Development, Bangladesh Open University, Gazipur, Bangladesh
  • Shuichi Satoh Laboratory of Fish Nutrition, Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Minato, Tokyo 108-8477, Japan
Keywords: Phosphorus, zinc, whole body, liver mineral, liver vitamin-C, rainbow trout

Abstract

A laboratory based 2 à 2 factorial experiment was conducted to investigate the influence of dietary phosphorus and zinc levels on whole body mineral, liver mineral, and liver vitamin-C contents of fingerling rainbow trout for 21 weeks. Two levels of phosphorus (19 and 30 mg g-1) and two levels of zinc (55 and 100 μ g g-1) in the dry diets were tested. Duplicate tanks of 30 rainbow trout (average weight 1.56 ± 0.24 g) per 60L glass tank were fed experimental diets three times a day to satiation level in 15 to 24oC water temperature. The result of the present study demonstrated that dietary zinc supplementation significantly influenced the whole body zinc and liver copper contents in fingerling rainbow trout where as additional phosphorus did not show any significant difference. Zinc supplementation significantly influenced the liver vitamin-C contents of the fish. Hence it is clear that zinc supplementation is necessary in fingerling rainbow trout feed. Further studies in this area are needed broadly.

Key words: Phosphorus, zinc, whole body, liver mineral, liver vitamin-C, rainbow trout

DOI = 10.3329/jard.v5i1.1470

J Agric Rural Dev 5(1&2), 135-142, June 2007

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How to Cite
Sarker, M., & Satoh, S. (1). Influence of Dietary Phosphorus and Zinc Levels on Whole Body Mineral, Liver Mineral, and Liver Vitamin-C Contents of Fingerling Rainbow Trout, <I>Oncorhynchus mykiss</I&gt;. Journal of Agriculture & Rural Development, 5(1), 135-142. https://doi.org/10.3329/jard.v5i1.1470
Section
Fisheries