بررسي تغييرات شوري آب بر مراحل رشد لارو ARTEMIA URMIANA

Water salinity and development of Artemia urmiana larvae

Effects of various water salinities on the life cycle, specially on embryonic development and larval stages of Artemia urmiana were investigated. Results indicated that 33 ppt is the optimal salinity for embryonic development and hatching, and various salinities have same effects on Artemiaʹs quantitative developments. Lower salinity (35 ppt) is more suitable for Artemiaʹs growth and development, on first stage of culture; On the other hand, it reaches the maturity much more slower and sometimes even stops. The medium salinites (60 and 100 ppt) are better for larvae growth and development; On day 24, the highest rate of maturity could be seen in 100 ppt. High and low salinities, reduce the rate of growth, development and survival ,as, after day 12, there were no live larvae in 180 ppt. The best salinities for the survival, as well as growth, development and maturity, were medium (60 & 100 ppt). The results showed: 1) adaptation of Artemia urmiana with medium salinities, and 2) both high and low salinities could cause stress on animal, and effect on its growth, development and survival.