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Penelitian ini dilakukan di Perairan Teluk Prigi pada bulan Mei 2017 di 18 stasiun. Parameter suhu, salinitas dan oksigen terlarut diukur secara in situ dengan menggunakan multi sensor kualitas air AAQ 1183 pada kedalaman 1, 5 dan 10 meter, sedangkan parameter kedalaman diukur menggunakan Echosounder GPS Map 585. Tujuan dari penelitian ini adalah untuk mengetahui distribusi suhu, salinitas dan oksigen terlarut dalam hubungannya dengan kedalaman di Perairan Teluk Prigi. Hasil menunjukkan bahwa kedalaman perairan tidak hanya mempengaruhi distribusi suhu, namun juga distribusi salinitas dan oksigen terlarut. Terdapat perbedaan distribusi parameter perairan yang cukup ekstrem pada 18 stasiun tersebut, terutama pada stasiun 2 dan 5, yang masing-masing terletak pada muara sungai dan Pantai Pasir Putih. Distribusi suhu dan oksigen terlarut mempunyai pola yang sama, namun berbanding terbalik dengan distribusi salinitas. Suhu tertinggi dan terendah ditemukan secara berturut-turut pada stasiun 2 (28,18 o C) dan 5 (26,72 o C). Demikian pula, kadar oksigen terlarut tinggi dan terendah terdapat pada stasiun 2 (8,40 ppm) dan 5 (7,99 ppm). Sebaliknya salinitas tertinggi dan terendah terdapat pada stasiun 5 (34,10 ‰) dan 2 (32,31 ‰). Perbedaan ekstrem pada distribusi suhu, oksigen terlarut, dan salinitas antara stasiun 2 dan 5 terjadi karena adanya pengaruh internal yaitu perbedaan batimetri dan kontur kedalaman pada kedua stasiun tersebut. Stasiun 2 memiliki kedalaman yang sangat dangkal (sekitar 4 meter), sedangkan stasiun 5 memiliki kedalaman yang relatif dalam (sekitar 24 meter). Penelitian ini menyarankan tentang pentingnya informasi batimetri dan distribusi kualitas air sebagai dasar untuk pemanfaatan perikanan dan pembangunan pelabuhan.

Immature Pacific bluefin tuna Thunnus orientalis , tagged with archival tags, were released near Tsushima Island in the East China Sea (ECS) during the winters of 1995, 1996 and 1997. Geolocations were estimated using the archival tags from recovered fish. These data, together with sea surface temperature (SST) data from satellite remote sensing, are used to describe the habitat used by these bluefin in the ECS from January to June for 3 years (1996, 1997, 1998), and to asses the effect of water temperature on fish distribution and movement. The results indicate that their geolocations ranged from the area north-east of Tsushima Island to the offshore area in the southwest. However, the area of highest density differed among years, being furthest south in 1996 and furthest north in 1998. The differences were probably caused by changes in SST associated with La Niña (1996) and El Niño (1998) events. Another densely populated area was identified in offshore waters of latitude 28-30 ° N in 1996 (only), on the cold side of the Kuroshio front. These fish may have been prevented from moving northwards by an intrusion of Kuroshio water of approximately 25 ° C into the region immediately to the north-east.

Proses pertukaran CO2  yang terjadi antara permukaan air laut dengan atmosfer merupakan aspek yang penting terhadap siklus karbon di samudera. Wilayah pesisir memiliki kontribusi besar dalam proses ini, karena kompleksnya interaksi yang terjadi antara atmosfer, daratan dan lautan. Proses penting dalam dinamika gas CO2 antara atmosfer dan air laut diawali dengan fungsi daya larut CO2 dan kecepatan transfer gas CO2 di permukaan laut atau disebut fluks CO2. Penelitian ini bertujuan untuk mengetahui fenomena fluks CO2  antara permukaan air laut dengan atmosfer di pesisir timur Pulau Bintan beserta komponen sink dan source-nya, serta mengetahui parameter yang paling dominan terhadap proses tersebut, meliputi parameter fisika-kimia oseanografi, serta parameter sistem CO2 pada kurun waktu 16-18 Maret 2013. Permodelan OCMIP digunakan untuk mengidentifikasi nilai pCO2 air laut dalam penentuan nilai fluks CO2. Hasil analisis menunjukkan secara kesuluruhan perairan pesisir timur Pulau Bintan berperan sebagai penyerap CO2 (sink) dengan  rata-rata  emisi  CO2   dari  atmosfer  yang  masuk  ke  wilayah  permukaan  laut  sebesar  -0,43mmolC/m2/hari.  Analisis  statistik  Principal  Component  Analysis  (PCA)  menunjukkan  parameter  yangdominan terhadap perubahan nilai fluks CO2 adalah salinitas, konsentrasi Dissolved Inorganic Carbon (DIC), pCO2 air laut, serta nilai selisih tekanan parsial CO2 antara air laut dengan atmosfer (ΔpCO2). Kondisi fluks CO2  di pesisir timur Pulau Bintan lebih dipengaruhi oleh variasi musim dan dinamika oseanografi perairan Natuna serta Laut Cina Selatan dibandingkan dengan pengaruh dari daratan.

HighlightHeavy metals (Cu, Zn, Pb, and Cd) in the seawater, sediment, and soft part of marine mussels were analyzedBioaccumulation Factor (BAF), Estimated Daily Intake and Target Hazard Quotient (THQ) were calculatedHeavy metals in the seawater, sediment and marine mussels were found in varying concentrationsHealth risk assessment indexes showed low values which means insignificant health hazardAbstractMarine mussels are known as one of the biological indicators of heavy metals pollution in the aquatic environment and the sources of protein for human consumption. This study aimed to investigate the concentration of heavy metals (Cu, Zn, Pb, and Cd) in the seawater, sediment, and soft parts of the marine mussels (Perna viridis, Meretrix sp., and Anadara granosa), as well as to evaluate its health risk of consumption from Madura Strait, Indonesia. The seawater, sediment, and marine mussels were obtained from four sites and heavy metal concentrations were analyzed using Atomic Absorption Spectroscopy. In the seawater, heavy metals were in the order of Cu, Pb, Cd, and Zn from the highest to the lowest concentration respectively, while they went down in the order of Zn, Cu, Pb, and Cd in the sediment respectively. Excluding the Pb, higher Cu and Zn concentrations were observed in marine mussels than in seawater and sediments (BAF> 1). Furthermore, it was proven that Cu and Zn were considered as essential metals and required for metabolism, while Pb and Cd were non-essential metals which their biological functions were unknown. The Estimated Daily Intake (EDI) of the marine mussels was lower than the oral reference dose (ORD) and low values of target hazard quotient (THQ < 1) had shown that the consumption of mussels containing heavy metals would not cause significant health risks to humans. The health risk assessment indexes showed low values, which meant insignificant health hazard. However, long-term exposure and the impact of consuming mussels containing heavy metals may require additional investigation

Sardinella lemuru is pelagic commodities that has economic values for the Indonesian. S. lemuru has some major advantages, such as abundant population on Indonesian marine, low price, and has omega-3 for the human body. The high demands of lemuru fish cause a high rate of cached, that can cause the risk of population degradation. Proper management of these commodities are needed to decrease the risk impact, that can be done rightly based on the equal value of information, and one of them is genetic diversity. This research compiles the recent researches about the genetic diversity of Sardinella lemuru in Indonesia waters to get the explanation about lemuru fish diversity. The value of genetic diversity observed is based on the diversity value of Haplotype (Hd), because these two values have a positive correlation to make a whole representation from a commodity. The results of this review show that the genetic diversity of lemuru fish on Indonesian marine territorial has the high-value category. These results explain that in the high activities of fishing, lemuru fish genetically still have a high diversity that leads to the conclusion lemuru fish commodities has a high-level ability to adapt from environmental conditions.