Vietnam Journal of Marine Science and Technology

Establishing an initial source of tissue culture material is the first and most important step in the propagation process. To prepare for this stage, seaweed must be acclimatized in vitro for 4 to 8 weeks before sterilization. In this study, Eucheuma denticulatum seaweed branches were collected from seaweed farms operated by local households in Van Phong Bay, Dai Lanh commune, Khanh Hoa province,…

Since the seas are considered one of the main sources of food for humans, the food taken from them must be free of pollutants of all kinds. In this study, samples of biota and fish were collected from Iraqi marine waters, as well as from the local market, and the specific activity of natural radionuclides was measured using gamma spectroscopy with a 3 × 3 NaI(Tl) crystal. In the Iraqi marine samp…

This paper presents an intercomparison of statistical, machine-learning, and signal decomposition methods for estimating sea-level trends using the long-term tide-gauge record at Hon Dau tide gauge (northern Vietnam) during 1960–2024. Classical statistical approaches (Mann–Kendall, Ordinary Least Squares), machine-learning models (Random Forest, Support Vector Regression, Artificial Neural Networ…

Surface current observations collected from December 2024 to February 2025 were analyzed to investigate tidal dynamics and residual circulation in the coastal waters off the Red River Delta, northern Vietnam. Harmonic analysis was applied to identify the dominant tidal constituents and their spatial characteristics, while residual currents were obtained by removing the principal tidal components.…

This study employing the Delft3D numerical model investigated the Mekong Delta’s seasonal current dynamics, simulating its hydrodynamic regime in 2019. Using Nash-Sutcliffe Efficiency and Root Mean Square Error metrics, the model’s accuracy in replicating measured water levels (cm) and currents at various stations was validated, achieving acceptable simulation results. This allowed for reliable a…

Five compounds, including thyrsiferol (1), 11-hydroxy-8-oxo-β-cyperon (2), (+)-elatol (3), [3(15)E,4Z,6S,9S,10R]-10,15-dibromochamigra-3(15),4,7(14)-trien-9-ol (4), and pacifidiene (5) were isolated from the methanol extract of the sea hare Aplysia dactylomela, collected at Quang Ngai province, Vietnam. Their structures were elucidated from HR-ESI-MS and NMR spectral data. Compound 2 was obtained…

Microplastics have increasingly been recognized as an emerging pollutant and have attracted considerable global scientific attention due to their potential impacts on ecosystems and human health. However, information on microplastics in Vietnam’s marine environment remains limited, fragmented and lacking systematic synthesis. This study provides a systematic review of peer-reviewed publications f…

The objective of this study was to perfect the callus culture method for propagating Kappaphycus striatus. Our research focuses on enhancing somatic embryo (SEs) induction from the callus and micropropagule regeneration in SEs. In order to enhance the induction rate of SEs, the 16-week-old callus was transplanted into a semi-solidified PES (0.4% agar) medium supplemented with 0.5–3.0 mg.L-1 3-ind…

The fatty acid composition of Pinna nobilis samples collected from Phan Rang Bay and South Binh Thuan, Vietnam, was investigated. A total of 40 fatty acids, with chain lengths ranging from C14 to C24, were identified across the samples. The fatty acid profiles exhibited notable diversity, comprising saturated fatty acids (SFAs), branched-chain saturated fatty acids, monounsaturated fatty acids (M…

The Gulf of Tonkin (Vietnam part) comprises12 typical marine ecosystems distributed in 7 ecological regions. Human activities impacting the marine ecosystems are classified into three groups: strong impacts (fishing, aquaculture, navigation - ports, and marine infilling); medium impacts (dredging - dumping, mining, tourism - services); and weak impacts (security - defense). Climate change and nat…

In this study, the impacts of tides, ocean waves, and sea dikes on coastal flooding in Thanh Hoa Province caused by storm surge in combination with tides were evaluated using simulated flooding results for Typhoon Doksuri (September 2017). The simulations were conducted with the SuWAT numerical model, in which tide, wave, and storm surge processes were integrated. The SuWAT model was developed us…

The study evaluates the technical potential of offshore wind energy in Vietnam based on a 30-year dataset (1991–2020) with a spatial resolution of up to 3 km. The offshore wind energy potential was determined at a height of 100 meters (above sea level) for Vietnam’s exclusive economic zone and was classified into shallow waters (depths below 50 meters) and deep waters (50–1000 meters) and by mont…

Four specimens of Stolephorus acinaces Hata, Lavoué and Motomura, 2020 (previously known only from the type specimens collected from the northern coast of Borneo) were collected from southern Vietnam, and their identification confirmed by analysis of the cytochrome oxidase subunit I (COI) gene. The specimens represent the northernmost records of the species, which is redescribed, including a fres…

The study evaluated the chemical composition, molecular weight, and antioxidant activity of ulvan extracted from Ulva papenfussii and Ulva lactuca. The results revealed distinct differences in the monosaccharide composition, sulfate content, and uronic acid levels between ulvans from both species, with ulvan from U. papenfussii exhibiting higher levels of iduronic acid and sulfate (16.39 ± 0.45 %…