The effect of different substrate and antifouling coatings on Barnacle Amphibalanus improvisus settlement (South of the Caspian Sea)

One of the environmental problems of the Caspian Sea is the introduction of alien species, some of which have the property of biological adhesion, which cause problems for marine facilities and vessels. The aim of this study was to investigate the effects of the body material and anti-sticking paint of the floats on the settlement of the barnacle Amphibalanus improvisus in the southwestern Caspian Sea basin. A total of six types of paints (Pamchal, Runas, Rangin-zare, Skele, Bajak and Hempel) in two types of plates (fiberglass and shipbuilding steel) with dimensions of 10 x 10 cm were tested in the coast of Chabaksar, 2020-2021. They were tested with two unpainted surfaces and in general in 14 treatments each with 3 repetitions. In total, fiberglass surfaces performed better than steel surfaces in terms of reducing barnacle settlement and in terms of the above indicators between the two There was a significant difference in the page. In addition, the expected effectiveness of the colors with regard to the appearance color did not take place. The reason for the better performance of fiberglass was the presence of fine textures and hardness in steel plates. Also, the lack of regular effectiveness of the colors was due to the different effectiveness of the chemical compounds of the colors on the two levels. In conclusion, the color of the plates, which was affected by the chemical composition of the paints, can be effective in the final settlement of the adhesive organisms, and the fiberglass plates have less adhesion than steel.