Identification of land suitability as the basis for cultivation of octopus cyanea in Lombok waters

Octopus has an important ecological role as both a predator and prey and is classified as an important economic fishery commodity because it contains high enough nutrition. Octopus is germplasm which is Indonesia’s wealth of biological resources. The existence of this octopus needs to be maintained in these waters so that its sustainability is maintained. Therefore, it is necessary to manage octopus cultivation considering the importance of octopus economic and ecological functions. Geographic information system is one method that can be used in this research. This method can be used to make it easier to find out the location of its distribution, so that the development of octopus cultivation activities can be achieved optimally. The purpose of this study was to analyze the prospects for octopus cultivation using GIS applications presented in the form of supply maps for octopus cultivation in the Lombok waters. This research was conducted in June July 2023 and the determination of sampling locations was carried out using purposive sampling based on consideration of problems with environmental conditions at the observation station, covering the Lembar area, Beraringan Beach, Ketapang Beach, Sari Gong Beach and Poto Tano. The results obtained are: temperature 25,25 – 38,13 0 C, brightness 20 - 25 m, current speed 0,2 – 0,8 m/s, depth 20 - 25 m, rainfall 65 - 364 mm, protection: protected, sufficient protected and unprotected, pH 5,7 – 8,4 salinity 33 – 37 ppt, DO 6,19 – 6,52 mg/l, substrate: sandy coral, coral fracture and rocky coral, chlorophyll a 0,26-1,38 mg /m 3 , and the number of octopuses 100 250 individuals. Locations according to land for very suitable category in Poto Tano and Ketapang Beach; the appropriate category in Lembar; unsuitable category in Beraringan Beach and Sari Gong Beach.