Inventarisasi Keanekaragaman Jenis Ikan pada Mikrohabitat Rockpools di Ekosistem Pantai Berbatu

Abstract

Rockpools are specific microhabitats in rocky shore ecosystems that are depressions in the coral or shore substrate that fill with seawater at low tide. Rockpools become microhabitats for particular species that can survive in this environment. The unavailability of studies on the inventory of fish species diversity in rockpools microhabitats in rocky coastal ecosystems, especially beaches in Pecatu Village, Badung Regency, is the basis for this research. This study aimed to determine the characteristics of the rockpools microhabitat, the inventory of fish species diversity, and the ecological index of fish species found in the rockpools microhabitat in rocky coastal ecosystems. The method used in this study was purposive sampling at three stations. The results of observations of rockpools' microhabitat characteristics, namely the combination of substrate type. Water conditions in rockpools microhabitat include temperature ranging from 29.27 - 29.85 °C, pH from 7.71 - 7.95, and DO from 7 - 9.2 mg/L. The area of rockpools microhabitat ranges from 4.8 - 1176.9 m² with a 5 - 50 cm depth. The observations of fish species found that the microhabitat of the rockpools in the rocky coastal ecosystem consists of 7 families with 12 species of fish. In addition, the statistical test results show significant differences between the three research locations. Ecological indices include fish species diversity index values categorized as moderate(1.6 - 1.7), fish species uniformity index values categorized as moderate (0.6 - 0.7), and fish species dominance index values categorized as low (0.2 - 0.3).