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<p>This study employed life cycle assessment to evaluate the environmental impacts of Chinook salmon (<i>Oncorhynchus tshawytscha</i>) aquaculture in Hakodate, Japan. The data were used to explore the possibility of regional carbon-neutral (RCN) aquaculture. The kelp cultivation area required for carbon offsetting was calculated. SimaPro software was used to quantify greenhouse gas emissions and other environmental burdens associated with a full production cycle. The impact of Chinook salmon production on global warming was determined to be 34,301&#xa0;kg CO<sub>2</sub>eq/t and the total CO<sub>2</sub> emissions were 32,966&#xa0;kg CO<sub>2</sub>/t, primarily associated with electricity used for groundwater pumping. The kelp area required to offset the present emissions was 10,669 m<sup>2</sup>/t. Sensitivity analyses revealed that replacing conventional electricity with solar power and increasing production would reduce this area to 2117 m<sup>2</sup>/t, with associated CO<sub>2</sub> emissions of 6541&#xa0;kg CO<sub>2</sub>/t. Optimization of the overall Chinook salmon aquaculture strategy as well as energy usage would ensure RCN aquaculture.</p>

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Evaluation of carbon neutrality requirements for Chinook salmon Oncorhynchus tshawytscha aquaculture based on life cycle assessment

  • 期刊论文

  • 发表日期：

    2025年12月10日

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  • Eri Yoshioka,
  • Tomohiro Masumura,
  • Manabu Ishihara,
  • Tomoki Abe,
  • Yuki Takahashi

摘要

This study employed life cycle assessment to evaluate the environmental impacts of Chinook salmon (Oncorhynchus tshawytscha) aquaculture in Hakodate, Japan. The data were used to explore the possibility of regional carbon-neutral (RCN) aquaculture. The kelp cultivation area required for carbon offsetting was calculated. SimaPro software was used to quantify greenhouse gas emissions and other environmental burdens associated with a full production cycle. The impact of Chinook salmon production on global warming was determined to be 34,301 kg CO2eq/t and the total CO2 emissions were 32,966 kg CO2/t, primarily associated with electricity used for groundwater pumping. The kelp area required to offset the present emissions was 10,669 m2/t. Sensitivity analyses revealed that replacing conventional electricity with solar power and increasing production would reduce this area to 2117 m2/t, with associated CO2 emissions of 6541 kg CO2/t. Optimization of the overall Chinook salmon aquaculture strategy as well as energy usage would ensure RCN aquaculture.