Effect of Dietary Phosphorus and Zinc Levels on Hematocrit Value, Plasma Mineral Content and Plasma Alkaline Phosphatase Activity of Fingerling Rainbow Trout, <i>Oncorhynchus mykiss</i>

Authors

  • MSA Sarker School of Agriculture and Rural Development, Bangladesh Open University Gazipur-1705, Bangladesh
  • S Satoh Laboratory of Fish Nutrition, Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Minato, Tokyo-108-8477, Japan

DOI:

https://doi.org/10.3329/pa.v20i1-2.16870

Keywords:

Hematocrit, Plasma mineral, Plasma alkaline phosphatase, Rainbow trout

Abstract

A laboratory based 2 × 2 factorial experiment was conducted to investigate the effects of dietary phosphorus and zinc levels on hematocrit value, plasma alkaline phosphatase activity and plasma mineral contents of rainbow trout fingerling for 21 weeks. Two levels of phosphorus (19 and 30 mg/g) and two levels of zinc (55 and 100 µg/g) in the dry diets were tested. Duplicate tanks of 30 rainbow trout (average weight 1.56 ± 0.24g) per 60L glass tank were fed experimental diets three times a day to satiation level in 15 to 24oC water temperature. Zinc supplementation in the practical diets significantly increased the hematocrit value, plasma alkaline phosphatase activity and plasma zinc contents in rainbow trout fingerling. On the other hand, addition of phosphorus did not show any significant difference among the treatments. The result of the present study demonstrated that additional zinc significantly (P<0.05) influenced the hematocrit value, plasma alkaline phosphatase activity and plasma zinc contents in rainbow trout. Hence, it can be concluded that zinc supplementation is necessary in fingerling rainbow trout feed. Further studies in this area with different size and age of rainbow trout are needed broadly.

DOI: http://dx.doi.org/10.3329/pa.v20i1-2.16870

Progress. Agric. 20(1 & 2): 183 192, 2009

Downloads

Download data is not yet available.
Abstract
661
PDF
595

Downloads

Published

2013-11-05

How to Cite

Sarker, M., & Satoh, S. (2013). Effect of Dietary Phosphorus and Zinc Levels on Hematocrit Value, Plasma Mineral Content and Plasma Alkaline Phosphatase Activity of Fingerling Rainbow Trout, <i>Oncorhynchus mykiss</i>. Progressive Agriculture, 20(1-2), 183–192. https://doi.org/10.3329/pa.v20i1-2.16870

Issue

Section

Fisheries