Effect of ocean acidification and temperature on growth, survival, and shell performance of fluted giant clams (Tridacna squamosa)

Abstract

Abstract This study aims to determine the effect of ocean acidification and temperature on growth, survival, and shell performance of fluted giant clam ( Tridacna squamosa ). Juvenile fluted giant clam put into an aquarium which is given a combination of CO 2 pressure treatment (415, 1000 and 1800 ppm) and temperature (30, 32, and 34°C). Measuring the length, width and height of the shell perform in every two weeks for five times. CaCO 3 content and shell strength was test at the end of the study. The best growth of shell length, shell width, and shell height in the treatment of CO 2 concentrations of 415 ppm and temperatures of 30°C were 23.28 mm, 11.51 mm and 0.69 mm respectively. Survival live also obtained in the treatment of CO 2 concentrations of 415 ppm and temperatures of 30°C and CO 2 concentrations of 415 ppm and temperatures of 32°C each of 100%. The strength of the shell and CaCO 3 content decreased in the treatment of CO 2 concentration and high temperatures. Higher concentration of CO 2 and increased temperature negatively affected the growth of length, width, survival of scales, reduced strength and the CaCO 3 content of shell.

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