Assessment of Fish Species Composition and Biodiversity in the Bioreeftek Installation Area of the Makassar Strait, Indonesia

Abstract

Demersal fishing has been intensively carried out so that it has an impact on population changes and ecosystem damage. Based on this, the study was conducted in the waters of the Makassar Strait from June to September 2023 to determine the composition, diversity, uniformity, and dominance of fish species caught around the Bioreeftek installation, which had been in place for three years. This study was conducted in the waters of the Makassar Strait from June to September 2023. This study used a survey method through direct observation and capture around the installation of the bioreeftek using a trammel net fishing gear. The results showed that the fish samples caught at the research location were 721 individuals. Species. During the study 11 distinct fish species was recorded, namely Lethrinus lentjam, Caranx sp, Epinephelus merra, Epinephelus spilotocep, Cephalopholis sp, Therapon therap, Lutjanus monostigma, Nemipterus tumbuloide, Siganus doliatus, Parachaetodon ocellatus, and Lutjanus sp. The highest composition of Japanese threadfin bream is 26.07% and the lowest is Sixspine butterflyfish 5.13%, diversity ranges from 5.87-74.02 with high category, uniformity 0.38-4.84 with low, medium and high categories and low dominance (0.003-0.068). The composition of the catch in bioreeftek is dominated by Japanese threadfin bream (Nemipterus japonicus Bloch, 1791), while diversity is classified as high and uniformity varies with low dominance as evidence that the restoration carried out has an effective impact in restoring ecosystem function in coastal areas.