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Assessing environmental carrying capacity of sea cage culture in the Yellow Sea, China, using a coupled diffusion model

文献类型： 外文期刊

作者： Zhao, Yunxia 1 ; Zhang, Jihong 1 ; Wu, Wenguang 1 ; Teng, Fei 3 ; Kelly, Ryan M. 5 ; Sun, Ke 1 ; Liu, Yi 1 ; Qu, Dapeng 3 ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, 106 Nanjing Rd, Qingdao 266071, Peoples R China

2.Pilot Natl Lab Marine Sci & Technol Qingdao, Funct Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266200, Peoples R China

3.Minist Nat Resources, Inst Oceanog 1, Qingdao 266061, Peoples R China

4.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Reg Oceanog & Numer Modelling, Qingdao 266200, Peoples R China

5.Rykell Sci Editorial LLC, Los Angeles, CA USA

关键词： Environmental carrying capacity; Sea cage culture; Hydrodynamic model; Lagrangian particle-tracking model; Sea bass; Yellow Sea

期刊名称：AQUACULTURE （ 影响因子：4.242； 五年影响因子：4.723 ）

ISSN： 0044-8486

年卷期： 2020 年 520 卷

页码：

收录情况： SCI

摘要： The rapid development of offshore mariculture brings the environmental challenges and requests for carrying capacity-based management strategy. A pollutant diffusion model coupled hydrodynamic model and 3-D Lagrangian particle-tracking model was implemented to evaluate the environmental carrying capacity of the sea cage in off-coast farming in the Yellow Sea, China. The water level data on August 1-31, 2018 and concentration of nutrient in surface sediment in May, August, November 2018, and January 2019 were used to verify the model. The results showed that the model is reliable to capture the main characteristics of the environmental variables in the study area. Total annual sea bass output were around 335 t per year (t a(-1)), the nitrogen and phosphorus emissions of about 30.95 t a(-1), 5.90 t a(-1), respectively. Total nitrogen in the sediment accumulated to 691.4 mg kg(-1) (0.056 kg m(-2)) on average after a year simulation. The selection of culture sites, especially the current velocity, and settling velocity of the particles play significant roles on the fish output and the diffusion of pollutants. According to the acceptable standards of sediment nitrogenous nutrient, the sea bass culture density can be expanded to 1.46 times the present level to reach the environmental carrying capacity. Feed formulations and feeding regimes are important factors in determining the carrying capacity that need to be strategically improved with developing technology. The model provides a useful tool to sustainable environmental management of sea cage culture.

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