Evaluating the Efficiency of Using the Bioraak Method in Planting Coral Acropora calthrata) in the Chabahar Bay)

Climate change and human activities have, over the years, resulted in the loss and reduction of the level of coral ecosystem coverage and the reduction of the effectiveness of conservation and rehabitation projects.  So, it is necessary to use technologies such as biorock to increase the growth and survival rate of corals. In this regard, the effects of using biorock method on the growth and survival of coral (Acropora calthrata) in the Chabahar Bay were evaluated. Coral pieces were placed on steel structures under a 6V electric field in the biorock process. The coral growth, growth performance and survival rates of corals during the twenty-eight weeks were studied. The mean coral growth  in the biorock structure was 12 ± 0.29cm and the mean coral growth was 5.25 ± 0.23 cm in the non biorock structure. The results show a significant difference between coral growth in the biorock with non biorock structures (p <0.05). The results of this survey on the growth rate of Coral (A. calthrata) in the biorock structure compared to the control structures showed a two-fold increase in growth and a higher  survival  rate. The results of this study indicated that stimulation of coral (A. calthrata) growth by biorock  method could be use biorock technology to stimulate coral growth and survival in protection and rehabitation program.