Comparative analysis of the growth and survival of protozoa stages of Penaeus semisulcatus fed with four phytoplankton species

Document Type : Research Paper

Authors

Bushehr

Abstract

Four genera of phytoplankton including Tetrasehnis, Chaetoceros, Skeletonema and Chlorella were used as food for protozoa stages of Penaeus semisulcatus in 10 treatments each with three replications of singular and double diets. In singular diet consisted of 40,000 cells/ml of Skeletonema, we recorded a survival rate 82% growth rate 3.55 mm and period of development stage (Z I-MI) 92h which were higher than other treatments. In double diet comprised of Chaetoceros and Tetrasehnis, the survival rate in Zl stage 97% higher than other treatments while in Z2 and Z3 stages, the highest survival rate was 9500, achieved by a double diet consisted of Skeletonema and Chaetoceros. In the latter diet, the growth rate and period of development for Z I-MI stages and growth rates in singular diets are higher than double diets of the phytoplankton species.

Keywords

Iranian Scientific Fisheries Journal
Volume 14, Issue 2
November and December 2005
Pages 25-32

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