Seaweed culture play role in human food, animal feed, and environmental quality. The intensively study of seaweed culture was conducted in many places. The need to assess seaweed production, fish catch and the water quality of the seaweed culture area was necessary. The present study investigates the integrated system for seaweed culture and fishing ground for Mugil cephalus in marine coastal waters area. The purpose of study was to assess the production of cultured seaweed (Eucheuma Cottonii) and caught Stripped Mullet (Mugil cephalus) in marine coastal waters. The study was conducted from October 2019 until March 2020 in southern marine coastal waters of Bulukumba Regency, South Sulawesi, Indonesia. The method of seaweed culture was longline with a rope length of 50 and the distance between rope stretches of 1 meter with the average number of rope stretches 50 stretches perunit. Stripped Mullet was caught using a surface gillnet 100 length, 2.5 m depth and 1,3/4 inch mesh size. The water quality such as water temperature, salinity, pH, brightness, current velocity was measured. The production of seaweed in this area during planting period between 40-45 days ranged 8.300-11.600 kg wet/ha and catch Stripped Mullet ranged 43-162 individuals/one day trip. The results of study suggest that a seaweed culture influence on the production of cultured seaweed and caught mullet in marine coastal waters. The water quality parameters during study were favorable for seaweed production grey mullet fish catching.

Abstract. Putri ARS, Zainuddin M, Musbir, Mustapha MA, Hidayat R. 2021. Mapping potential fishing zones for skipjack tuna in the southern Makassar Strait, Indonesia, using Pelagic Habitat Index (PHI). Biodiversitas 22: 3037-3045. Southern Makassar Strait is one of the potential fishing grounds for skipjack tuna in the Indonesian waters. Oceanographic factors become the primary factors that limit the distribution and abundance of fish. The study aimed to identify the relationship between fish distribution with sea surface temperature (SST) and primary productivity (PP) and map out the potential fishing grounds of skipjack tuna in the southern Makassar Strait. It used pelagic habitat index (PHI) analysis, which is strengthened by the results of correlation analysis in the form of generalized additive models (GAM) and Empirical cumulative distribution function (ECDF) analysis. The results showed that the distribution of skipjack tuna was significantly associated with the preferred range of SST 29-30.5°C and PP 350-400 mg C/m2/day. The potential fishing zone is well established near the coast to offshore of Barru and Polman waters (3°-6°S and 117°-119°E), with the peak season in May and October. The spatial pattern of potential fishing grounds for skipjack fishing is associated with hotspots (oceanographic preference), leading to increased feeding opportunities. This study suggests that the spatial pattern of high potential fishing zones could improve fishing, management, and conservation strategies along the southern Makassar Strait.

The purposed of this research is to analyze the performance of purse seine fishing gear operated on FADs and purse seines that hunt schools of fish (without FADs) based on four aspects of performance (biological, technical, social, economic) . This research method is a survey method, taking 10 samples of each of the FAD purse seines and without FADs and analyzed using the scoring method through the biological, technical, socio-cultural and economic performance approaches. The results obtained by performed the FAD purse seine and non-FAD purse seine were in good enough criteria, namely ≥ 50 -75%. In general, the performance of the two fishing gear units did not have a significant difference, because there were similarities and differences that did not greatly differ from each aspect of the performance review. Based on the biological aspects, the performance of purse seine without FADs is better than that of the purse seine using FADs because catch fish with a suitable size and uniform species. whereas based on the economic and technical aspects, the performance of purse seine using FADs is better than purse seine without FADs. This is due to higher catch production and income. Based on the social aspect, the performance of both of them has no difference.