Pertumbuhan Dan Laju Pertumbuhan Karang Stylophora pistillata Dengan Jenis Substrat Berbeda Yang Ditanam Pada Tiga Kedalaman Di Pantai Serangan

ABSTRACT Coral transplantation is the activity of cultivating/breeding coral colonies using the fragmentation method. This activity is carried out as an effort to prevent damage to the coral reef ecosystem so the existence of coral reefs and the species that live around them can be maintained. Several techniques have been used in transplant activities, but knowledge of the right transplantation technique is needed so the activities can run well. This research aims to determine the effect of different types of substrates used on the growth and growth rate of coral Stylophora pistillata transplanted at three depths at Serangan Beach, so the transplantation activities run effectively and efficiently. The research was carried out for four months from November 2021 to March 2022 through field research using the Randomized Block Design method with two factors, namely the type of substrate used (cement and sand; bricks) and different depths (1 m, 3 m and 5 m). This study used 90 fragments of Stylophora pistillata. The results of the analysis showed that the different types of substrate gave significantly different effects on growth and growth rate at a depth of 1 m. However, at the other two depths, the effect of different substrate types were not differed significantly. The best coral growth and growth rate was seen in corals using cement and sand substrates transplanted at a depth of 1 m with growth of 3,29 cm (height) and 3,93 cm (width), while the highest growth rate was 0,82 cm/ month. (height) and 0,98 cm/month (width).