Increasing alkalinity to mitigate biogenic acidification and its negative effects during the North-south-relay transportation of abalone

文献类型： 外文期刊

第一作者： Li, Jiamin

作者： Li, Jiamin;Li, Jiamin;Li, Jiaqi;Jiao, Minghui;Li, Ang;Liu, Zirong;Shen, Zhongzhi;Xue, Suyan;Liu, Lulei;Mao, Yuze;Li, Jiaqi;Jiao, Minghui;Li, Ang;Liu, Zirong;Shen, Zhongzhi;Xue, Suyan;Liu, Lulei;Mao, Yuze;Zhang, Yitao

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关键词： Biogenic acidification; Carbonate system; Mollusks; North-south-relay aquaculture model; Total alkalinity

期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：2.4； 五年影响因子：2.7 ）

ISSN： 0967-6120

年卷期： 2025 年 33 卷 6 期

页码：

收录情况： SCI

摘要： Most cultivated abalone have to experience long-distance transportation under the current dominant relay aquaculture model in China, which produces more than 220 thousand metric tons of abalone annually. However, biogenic acidification caused by high stocking density during transportation may impair abalone physiology, including respiration, flipping behavior, feeding, and calcification, but remains poorly understood. In this study, juvenile abalone (Haliotis discus hannai) were incubated in either ambient seawater (control group) or seawater with elevated total alkalinity (TA-elevated group). We assessed changes in seawater carbonate chemistry and evaluated the physiological impacts of biogenic acidification. Specifically, the control group exhibited a significant decrease in pH and an increase in pCO(2), whereas the TA-elevated group showed the opposite pattern. After 24 h of incubation, there were significant differences in the respiratory metabolism between individuals from the two groups (P < 0.05). The average oxygen consumption rate of abalone from the control group was significantly lower than that from the TA-elevated group, whereas CO2 emission rate was significantly higher (P < 0.05). Respiratory quotient (C: O) was higher in the control group, though the difference was not statistically significant. In terms of flipping behavior, individuals in the TA-elevated group exhibited significantly lower flipping durations compared to those in the control group (P < 0.05). The feed consumption of individuals in the TA-elevated group was significantly higher than those from the control group (P < 0.05). Moreover, calcification rates in the TA-elevated group were significantly higher than those in the control group during both the initial (0-6 h) and final (17-24 h) stages of the simulated transportation period (P < 0.05). Our results demonstrated that biogenic acidification occurs during transportation and negatively affects the physiology of juvenile abalone, while increasing the carbonate buffering capacity of seawater by raising TA is effective in mitigating these negative impacts.

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