Demersal Fish Diversity Index in Cirebon Waters, West Java

This study aims to analyze the distance between the placement of the base fish aggregating devices (FAD) from the beach, the composition of the catch, identify fish species and determine the diversity of fish caught at different distances of the base FAD in Cirebon waters. The research method was carried out descriptively by census. Data analysis method for demersal fish diversity index value (H') using Shannon-Wiener and t-test. Sampling of respondents was carried out by census as many as 20 basic FAD fishermen. The research location is in the Cangkol Tengah Fishermen Association, Cirebon City. The results of this study indicate that the number of fish species caught on FADs with a distance of <12 miles was obtained 10 species with 6,784 fish, the largest number of fish caught was snapper (Lutjanus Campechanus) as many as 2,040 fish with a percentage of 30.2% of the total number of fish. The whole fish caught, while the fish with the largest weight was snapper for distances <12 miles with an average weight of 658.92 kg or 30% of other types of fish. The number of fish species caught on FADs with a distance of >12 miles obtained 10 species with 9.217 fish, the highest number of fish caught was snapper (Lutjanus Campechanus) as many as 2,884 fish with a percentage of 27.97% of the total number of fish caught, while the fish with the greatest weight is snapper with an average weight for distances >12 miles of 988.39 kg or 30% of other types of fish. The magnitude of the demersal fish diversity index value at the base FAD placement distance <12 miles was 1.6672 and more than 12 miles was 1.8137 which means that there is no significant difference and the diversity index category is small because the value of H '≤ 2.