Abstract
The existence of coral reefs in Muara Badak makes this ecosystem very attractive as an object of research, especially reef fish. The aim of this research is to determine the structure of the reef fish community in Gusung Batu Lampe, Muara Badak. A reef fish survey was carried out through scuba diving activities, using the video belt transect method at 10 points. The observed reef fish were identified to the genus level and community structure analysis was carried out in the form of diversity, uniformity, and dominancy indexes. The results showed that in total, 3.699 individuals were found consisting of 61 genera of fish from 23 families. The diversity index shows genera diversity, ecosystem stability, and productivity in high conditions. The uniformity index shows the distribution of individuals between each genera was moderately distributed and had no dominancy of particular genera.
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