Vol.12 (2022) No. 2 ISSN: 2088-5334 Suitability Area of Groupers (Serranidae) Cultivation in Floating Net Cage (FNC) System in Kepulauan Seribu Astrid Damayanti a,* , Ligar Rahayu Ningtiyas a , Supriatna a , Rizki Oktariza a a Department Geography, Universitas Indonesia, Kampus UI, Depok, Jawa Barat, Indonesia Corresponding author: * astrid.damayanti@sci.ui.ac.id Abstract— Aquaculture is one of the steps taken by the DKI Jakarta Provincial Government to manage fishery resources. Kepulauan Seribu, in recent years, has experienced a decline in the production of fresh fish; therefore, the cultivation of the Grouper floating system has become an alternative solution. Successful breeding is supported by site selection due to assembling on the terms of Groupers life that includes water quality and oceanography. Water quality parameters include salinity, pH, dissolved oxygen, and oceanographic parameters, that is, sea surface temperature, depth, and current velocity. The method of analysis in this research is descriptive spatial based on the overlay results of Landsat 8 image data processing and in situ measurement data during the field survey. The analyst statistics was descriptive to analyze the relationship between the region of conformity with the results of Grouper fish production. The results of the statistical and spatial analysis found that the location of floating net cages in the Kepulauan Seribu in the class is very appropriate and appropriate. Meanwhile, the relationship between regional suitability and Grouper production in the Kepulauan Seribu is weak because production is related to other driving factors. Keywords— Fishery cultivation; floating net cages; oceanography; suitability area; water quality. Manuscript received 10 Sep. 2018; revised 29 Aug. 2021; accepted 22 Feb. 2022. Date of publication 30 Apr. 2022. IJASEIT is licensed under a Creative Commons Attribution-Share Alike 4.0 International License. I. INTRODUCTION Aquaculture is the activity of producing aquatic organisms, including fish, mollucs, crustaceans, and aquatics plants to gain profit [1,2]. In contrast, to capture fisheries, production from aquaculture is obtained through the maintenance of marine biota in containers and controlled environments that include seeding, maintenance, and harvesting [3]. The development of this cultivation activity is supported by the government to assist the supply of fresh fisheries production and reduce environmental water damage due to the use of destructive fishing gear [4]. One type of cultivation conducted in Indonesian waters is Grouper (family Serranidae) cultivation. Groupers are one of important food fishes with high commercial value in Asian countries as well as being a vulnerable group of fishes [5,6]. Indonesia as an archipelagic country, is the primary producer of Grouper fish from aquaculture, from Sumatra to Papua, especially in North Sumatra, Riau Islands, Lampung, East Java, Bali, Lombok and North Sulawesi [7]. The development of grouper cultivation in Indonesia mostly uses popular technology for grouper maintenance, namely floating net cages (FNC; local: Keramba Jaring Apung (KJA)) with certain criteria [8]. Grouper cultivation with FNC system influenced by the selection of the location assessed with suitable parameters of water quality as a requirement of Grouper habitat [9]. Site selection, a term of using facilities, and applied technology must follow the Indonesian National Standard [10]. The choice of the right location is very determining the suitability of fish production facilities that will affect the farmers' condition and also the status of the water environment [11]. The location feasibility is the result of conformity between the requirements of life and the development of a cultivation commodity to the aquatic physical environment [12]. In determining the suitability of the cultivation area within floating net cage, there are several variables used in the study; such are depth, water flow, temperature, salinity, degree of acidity (pH), and dissolved oxygen [13]. Water quality parameters that become the condition of Grouper's living are salinity, pH, dissolved oxygen, while the parameters of cultivation location of floating net cage (FNC) are temperature, depth, and current velocity [9]. One of the territories of Indonesia that conducted fish cultivation is Kepulauan Seribu. Approximately 70% of the 690