بررسي اثرات برخي از عوامل محيطي بر روي رشد جلبك قرمز در حوضچه هاي فايبرگلاس

The survey of effect some environmental fact

In order to survey effects some environmental factor on growth G. corticata in fiberglass tanks, was choosen four season of year and studied pH , temperature and salinity density 500 gr/m-2. On this way pH , temperature and salinity measured on daily, biometry was done every week once too, Seasons of Spring and Autumn have maximum growth rate percentage and net productivity by 3/74 ± 0/31 ,38/3 ± 5/4 and 3/17 ± 0/1 , 27/6 ± 3/57 , respectively . In this survey range of temperature was 23 ?C to 32?C for Spring and 23?C to 30 ?C for Autumn. Optimun growth and increased weight aquaired in 28 ?C . Salinity not showed different range and recorded in 36-40 ppt for the all season. At the other hand pH not showed different range and calculated in 8/14 ± 0/04 to 8/78± 0/05 for the all seasons, so growth rate weight not related to different range of pH and salinity.