Amer abdollah nezhad banaderi; Soheila Ebrahimi
Abstract
Abstract Pearl oyster Pinctada radiata is belongs to the family Pteriidae and is one of the pearl oyster Persian GOlf. This study was amid to determine the optimum amount of salt and its effects on the filtration Pearl maker incidents using phytoplankton Isochrysis aff galbana in five treatments ...
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Abstract Pearl oyster Pinctada radiata is belongs to the family Pteriidae and is one of the pearl oyster Persian GOlf. This study was amid to determine the optimum amount of salt and its effects on the filtration Pearl maker incidents using phytoplankton Isochrysis aff galbana in five treatments salinity (20, 25, 30, 35 and 40 parts per thousand), and 3 were repeated. Shells with an average length (dorsal-ventral) 49.67± 6.98 mm it was gathered from the Hendorabi island. The initial density of phytoplankton to town with 100,000 cells / ml were considered and at the time of one-hour and two-hour congestion they were counted again. The most of filtration rate was in 35 parts per thousand salinity that it is the first time 2459.77± 89.46 and 14.66% increase in the second hour with 2820.39±57 /00ml / hour / shellfish with other treatments were significantly different (P˂0.05). The filtration rate was about 20 ppt salinity levels in the first hour 140.51±37.02 and in the second hour with 32.12% decrease, 40.55±22.11 ml/ h/ shellfish with Other treatments that were significantly different (P˂0.05). The results showed that best salt for biological activity such as eating, breathing and growing incidents of pearl was in 35 ppt salinity also increases the filtration at second hour in 30, 35 and 40 parts per thousand reflects its ability to adapt in salinity.
