Page 22 - 《渔业研究》2025年第3期

第 3 期 张 智等： 基于生命周期评价的二倍体和三倍体牡蛎产品碳足迹比较分析 279

Comparison of carbon footprint of diploid and triploid oysters based on
life cycle assessment

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ZHANG Zhi ，LIN Yuxin ，CHEN Haibin ，LI Rongmao ，HUANG Chunxiu ，LIN Hua ，MU Jingli 1
(1. Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and
Oceanography, Minjiang University, Fuzhou 350108, China;
2. Fujian Fishery Resources Monitoring Center, Fuzhou 350000, China)
Abstract: [Background] China is a major aquaculture country. In the context of carbon peak and carbon neut-
rality, it is necessary to accelerate the establishment of management systems for the carbon footprints (CFP) and
enrich the practice of CFP barcodes for products, in order to adapt to the trend of low-carbon economy of the fu-
ture. [Objective] The present study aims to establish and optimize the CFP accounting method for aquatic
products, as well as to compare the CFP of major oyster products in Fujian Province. [Methods] Here, the CFP
of diploid oyster (Crassostrea angulate) and triploid oyster (C. angulate ♂ × C. gigas ♀) were compared by life
cycle assessment. The inventory analysis included the periods of breeding in the factory, farming in the sea and
cultivation marketing. [Results] The results showed that the “cradle-to-gate” CFP of 1 ton diploid and triploid
oysters were −210.79 kg CO eq and −37.92 kg CO eq, respectively. The “cradle-to-grave” CFP of 1 ton diploid
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and triploid oyster were −93.89 kg CO eq and 78.98 kg CO eq, respectively. The main carbon emissions of cul-
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tured oyster products came from the power consumption in the breeding period and the emission of farming fa-
cilities in the aquaculture period. In the future, carbon emissions can be further reduced by increasing renew-
able energy and using new materials in farming facilities. [Conclusion] Compared with other aquaculture
products, oysters have lower carbon emissions than most seafood, suggesting its environment-friendly superior-
ity. [Significance] This study will supporting the scientific management of aquaculture product carbon emis-
sions and development of CFP assessment methods, which is conductive to the green transformation of aquacul-
ture under the background of carbon peaking and carbon neutrality.
Key words: carbon footprint; life cycle assessment (LCA); diploid oyster; triploid oyster; aquaculture