Seaweed is one of the vital export aquaculture commodities in West Java of Indonesia. Since 2013, seaweed production in Muara Gembong Sub-District, especially Pantai Mekar Beach and Pantai Sederhana Villages, can be produced 7.000 tons from total 10.000 seaweed culture fisheries of Bekasi District (80%) that was developed with a polyculture system. To ensure the long-term success of providing seaweed production, evaluation of suitable location is an essential step in any aquaculture operation. This study was conducted to analyze suitable sites for seaweed aquaculture in the coastal area of Muara Gembong based on the condition of water quality. Water quality data were collected from 11 stations during field surveys in March, July, and October 2018. Water quality parameters were observed with physical parameters (Secchi disk transparency, temperature, and depth) and chemical parameters (salinity, pH, DO, phosphate, and nitrate). Evaluation of water quality data included compile of matrix suitability design through some works of literature. The suitability coastal areas were analyzed to get suitable location used GIS software from coordinate data and water quality parameters, which were compared. The class “suitable” has a score of 4, the “suitable enough” class has a score of 3, the “suitable with conditionals” class has a score of 2, and the class “not suitable” has a score of 1. Based on the measurement result, the “suitable” areas were Station 7 (Front of Muara Mati), Station 8 (Outermost Muara Mati), Station 11 (Muara Kuntul), and Station 12 (Front of Muara Kuntul). The coverage area that was in a suitable area category is 962.72 Ha (9.63 km2). The location also linear with the result based on salinity, DO, and transparency (Secchi dish transparency). There are selected locations compared with other stations in Muara Gembong coastal waters because those locations face waste problems from Citarum Watershed and Jakarta Bay. Also, the sites serve as a source of livelihood for the community.

Penelitian populasi bulu babi dan pemanfaatannya di perairan padang lamun Pulau Osi telah dilakukan pada bulan Juni 1995 sampai dengan Februari 1996. Metode transek kuadrat digunakan untuk menduga kepadatan populasi bulu babi tersebut. lndeks agregasi digunakan sebagai indikator dari sifat distribusi spasial populasi itu.

Penelitian sebaran ikan hias jenis Chaetodontidae sehubungan dengan kualitas terumbu karang telah dilakukan pada 10 lokasi di pantai utara Pulau Ambon dari bulan Juni sampai Juli 1994. Metode yang digunakan untuk penelitian keanekaragaman Chaetodontidae dan persen penutupan karang adalah sensus visual, survai manta tow dan line intercept transect.

Terumbu buatan di perairan dusun Jemeluk, Bali, diletakkan pada bulan Agustus 1991. Pemantauan komunitas ikan pada terumbu buatan tersebut dilakukan pada bulan November 1994 dengan metode sensus visual. Komposisi jenis ikan yang ditemukan di lima lokasi bervariasi, yang terendah 37 jenis dan tertinggi 61 jenis.

Abstract. Mujiyanto, Sugianti Y, Afandy YA, Rahayu R, Bidikusuma RA, Nasriri AS, Syam AR, Purnaningtyas SE. 2021. Reef fish community structure in the islands of Paraja Bay, Pandeglang District, Banten, Indonesia. Biodiversitas 22: 4402-4413. Paraja Bay waters have five small islands that coexist with Ujung Kulon National Marine Park and act as a buffer zone for the diversity of fishery resources. This study aimed to assess the reef fishes community structure at small islands in Paraja Bay. Observations were made in 20 locations during August and September 2019 in the five small islands. Reef fishes community structure showed 106 species as included major group (54 species), indicator group (24 species) and target group (28 species), among five small islands, i.e. Badul, Mangir, Oar, Sumur and Umang Islands. The highest reef fishes abundance was founded in Umang Island waters. Several target fish species recorded during the study were mature fish (such as those targeted by fishermen). Only a small proportion were juveniles. Reef fish community structure was categorized as stress community to stable community with its indication was low diversity value, high evenness index, and low dominance. The low diversity index value illustrates that the level of uniformity of reef fish species in Paraja Bay waters is high. This condition is evidenced by each coral fish group's evenness index included in the main species group around 0.93 to 0.98. The target species is 0.88 to 0.99.