Supporting Data for: Product Environmental Footprint (PEF) of gilthead seabream (Sparus aurata) juveniles fed side-streams from farmed blue mussel

The dataset is used as a foundation for the scientific article Product Environmental Footprint (PEF) of gilthead seabream (Sparus aurata) juveniles fed side-streams from farmed blue mussel. This study analysed the environmental footprints of rearing juvenile gilthead seabream using Life Cycle Assessment (LCA) principles aligned with the Product Environmental Footprint (PEF) method. Data were collected from a research facility where fish juveniles were fed diets with fishmeal partially or fully substituted at 100%, 50%, or 0%, with blue mussel (Mytilus galloprovincialis) meal. The results showed that the use of electricity and the feed were the largest contributors to most impact categories. Electricity use was primarily driven by the indoor flow-through facility's high-water renewal and lighting requirements. The sensitivity analyses showed a high uncertainty related to impacts from the blue mussel production. This dataset is connected to the interdisciplinary research project SECURE (Novel Marine Resources for Food Security and Food Safety) which investigate the potential of low-trophic marine species. The overall goal of the project is to develop knowledge that enables sustainable food security. More information is available through https://en.uit.no/project/secure. Highlights • Environmental footprint (LCA) of a gilthead seabream nursery has been assessed • Exchanging fishmeal with blue mussel meal increased emissions • Electricity and feed are major hotspots in flow-through rearing • Data insecurity in uncommon footprint assessments for mussels creates high sensitivity Abstract Transparent and precise information on the environmental impacts of products is critical for informed decision-making. In the EU, gilthead seabream (Sparus aurata) is among the most profitable aquaculture species. The environmental impacts of aquaculture vary depending on input factors. Despite the importance of hatcheries and nurseries in aquaculture, there are currently several knowledge gaps related to footprints, particularly outside of salmonid life cycle assessments. This study analysed the environmental footprints of rearing juvenile gilthead seabream using Life Cycle Assessment (LCA) principles aligned with the Product Environmental Footprint (PEF) method. Data were collected from a research facility where fish juveniles were fed diets with fishmeal partially or fully substituted at 100%, 50%, or 0%, with blue mussel (Mytilus galloprovincialis) meal. The results showed that the use of electricity and the feed were the largest contributors to most impact categories. Electricity use was primarily driven by the indoor flow-through facility's high-water renewal and lighting requirements. The sensitivity analyses showed a high uncertainty related to impacts from the blue mussel production. The total environmental footprint of juveniles was significantly higher than that of fully grown finfish aquaculture per functional unit, mirroring the higher care required during early life stages. Blue mussel meal shows promise as a feed ingredient from a palatability and growth perspective, however, its use may increase environmental impacts. Nevertheless, as the aquaculture industry continues to expand to meet global food demands, utilising a current waste stream might be among few feasible options to cover nutrient demands in fish feed.本数据集为学术论文《以养殖蓝贻贝副产物为饲料的金头鲷（Sparus aurata）幼鱼产品环境足迹（Product Environmental Footprint, PEF）》提供支撑。本研究采用契合产品环境足迹（Product Environmental Footprint, PEF）方法的生命周期评估（Life Cycle Assessment, LCA）框架，分析了金头鲷幼鱼养殖的环境足迹。研究数据采集自一处科研设施，该设施内的金头鲷幼鱼饲喂的饲料中，鱼粉分别以100%、50%或0%的比例被蓝贻贝（Mytilus galloprovincialis）粉部分或完全替代。研究结果显示，电力与饲料是多数影响类别的主要贡献源。电力消耗主要源于室内流水养殖设施的高换水需求与照明负荷。敏感性分析结果表明，蓝贻贝养殖带来的环境影响存在较高不确定性。本数据集关联跨学科研究项目SECURE（保障粮食安全与食品安全的新型海洋资源），该项目旨在探究低营养级海洋物种的应用潜力。该项目的总体目标是形成可支撑可持续粮食安全的知识体系，更多相关信息可通过https://en.uit.no/project/secure查询。 研究亮点 • 评估了金头鲷育苗场的环境足迹（生命周期评估，LCA） • 以蓝贻贝粉替代鱼粉会增加环境排放 • 电力与饲料是流水养殖中的主要环境热点 • 贻贝环境足迹评估的罕见性导致数据不确定性较高，进而带来高敏感性 摘要 产品环境影响的透明化精准信息对于科学决策至关重要。在欧盟地区，金头鲷（Sparus aurata）是盈利能力最强的水产养殖品种之一。水产养殖的环境影响因投入要素不同而存在差异。尽管孵化场与育苗场在水产养殖中意义重大，但目前仍存在诸多与环境足迹相关的知识空白，尤其是在鲑科鱼类生命周期评估之外的领域。本研究采用契合产品环境足迹（Product Environmental Footprint, PEF）方法的生命周期评估（Life Cycle Assessment, LCA）框架，分析了金头鲷幼鱼养殖的环境足迹。研究数据采集自一处科研设施，该设施内的金头鲷幼鱼饲喂的饲料中，鱼粉分别以100%、50%或0%的比例被蓝贻贝（Mytilus galloprovincialis）粉部分或完全替代。研究结果显示，电力与饲料是多数影响类别的主要贡献源。电力消耗主要源于室内流水养殖设施的高换水需求与照明负荷。敏感性分析结果表明，蓝贻贝养殖带来的环境影响存在较高不确定性。以功能单位计，幼鱼的总环境足迹显著高于成鱼水产养殖，这与早期生长阶段所需的更高养护强度相契合。从适口性与生长性能来看，蓝贻贝粉作为饲料原料颇具应用前景，但其使用可能会提升环境负荷。尽管如此，随着水产养殖业持续扩张以满足全球粮食需求，利用现有废弃物流或许是满足鱼粉营养需求的少数可行方案之一。