Shaukat Ali, Farida Begum, Syed Arif Hussain, Muhammad Akbar, Sujjad Hyder, Ghulam Raza, Salar Ali
Key words: Artemia sinica, salinity, prey algae, growth, survival.
The present investigation was carried out to determine the effects of two very important parameters i.e. salinity and micro-algal diets on the growth and survival of Artemia sinica. The animal was obtained in encysted form from Bohai Bay P.R. China, after 14 days constantly cultured (rearing trial) in laboratory with five different salinities. At the end of trial (day 14) all the organisms preserved with drops of acetic acid and total length were measured drawing them from the head to the end of the telson with a dissection microscope equipped with a camera. After 14 days of treatment, organisms at 40g/L salinity having average growth length 3.57± 0.43mm were severely affected. All the organisms showed their lowest survival rates at salinity of 50g/L. Almost all animals showed the highest survival level at 90g/L of salinity (100%) with average growth length 6.75± 0.23mm. In the present experiment salinity was inversely proportional to survival. Besides, the present study was also focused to evaluate the food value of three microalgal species (Isochrysis galbana, Platymonas helgolandica and Pavlova viridis) in terms of growth and maturation of A. sinica under laboratory conditions.The highest survival rate (100%) was observed during the feeding trial of A. sinica with Isochrysis galbana. The next most important diet was Pavlova viridis. The feeding of Platymonas helgolandica to A. sinica was not successful during the trial period. So in the present experiment the order of survival of A. sinica against different algae diets was; I. galbana ˃P. viridis ˃P. helgolandica.
Article Source: Volume 5, Number 4, October 2014 – JBES