مقايسه رشد و بازماندگاري مرحله زوآي ميگوي ببري سبز در تغذيه با چهارنوع جلبك بصورت انفرادي و تلفيقي

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

Four genera of phytoplankton including Telraselnris, Cʹhaetucerns, Skeletoneino and Cʹhulorella were used as food for protozoa stages of Penaeus semisulcatus in 10 treatmeants each with three replications of singular and double diets. In singular diet consisted of 40,000 cells/ml of Skelelonerna, we recorded a survival rate 82%, growth rate 3.55 mm and period of development stage (Z1-MI) 92h which were higher than other treatments. In double diet comprised of Chaetoceros and Tetraselmis, the survival rate in Zl stage was 97%. higher than other treatments while in Z2 and Z3 stages, the highest survival rate was 95%, achieved by a double diet consisted of Skeletonenra and Chaetnceros. In the latter diet, the growth rate and period of development for ZI-Ml stages were 4.58mm and 72h respectively. According to the results, we conclude that the susurvival and growth rates in singular diets are higher than double diets of the phytoplankton species.