Environmental Concerns for Sustainable Mariculture in Coastal Waters of South-Central Vietnam

Le Hung Phu, Phan Thi Kim-Hong, Tran Van Chung, Tran Van Binh, Le Trong Dung, Pham Hong Ngoc, Nguyen Hong Thu, Nguyen Thi Toan Thu, Nguyen Thai Hai Anh, Anh Lam Nguyen and Phan Minh-Thu
Additional contact information
Le Hung Phu: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam
Phan Thi Kim-Hong: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam
Tran Van Chung: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam
Tran Van Binh: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam
Le Trong Dung: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam
Pham Hong Ngoc: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam
Nguyen Hong Thu: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam
Nguyen Thi Toan Thu: Sub-Department of Fisheries, Department of Agriculture and Rural Development of Khanh Hoa Province, Nha Trang 650000, Vietnam
Nguyen Thai Hai Anh: Economic Department of Song Cau Town, Song Cau, Phu Yen 621900, Vietnam
Anh Lam Nguyen: Institute of Marine Science and Fishing Technology, Nha Trang University, 09 Nguyen Dinh Chieu, Nha Trang 650000, Vietnam
Phan Minh-Thu: Institute of Oceanography, Vietnam Academy of Science and Technology, Nha Trang 650000, Vietnam

Sustainability, 2022, vol. 14, issue 13, 1-16

Abstract: Mariculture provides an increasing seafood supply to a growing population. It also brings unintended consequences for the environment, resources, and sustainable development. In an attempt to evaluate the impacts of intensive mariculture of lobster in cages, the water quality and sediment quality in three South-Central regions of Vietnam, Xuan Dai Bay, Van Phong Bay, and Cam Ranh Bay, were monitored from April 2019 to May 2020. In each bay, two stations in the farming areas were compared to a non-farming reference station. The result showed no significant differences in the water quality parameters among the stations within each bay and between the bays. However, sediment quality noticeably differed between sites within each bay and between the bays. The accumulation of the observed parameters of sediment in farming areas was higher than in non-farming areas. In the Cam Ranh Bay, the concentration of organic carbon, total nitrogen, and total phosphorus in the sediment in farming areas was approximately 1.4 times higher compared to non-farming areas. Similar results were found in Van Phong Bay and Xuan Dai Bay with different magnitudes. Additionally, the difference in the sulfide concentration in the sediment of Van Phong Bay was notable for its better environmental quality than the other two. The findings indicated that mariculture wastes would accumulate in the sediment, and decompose over time, causing sediment degradation, which may affect the benthic biota in coastal waters.

Keywords: water quality; nutrient concentrations; sediment degradation; lobster culture (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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