Blue food demand across geographic and temporal scales.

Blue food demand across geographic and temporal scales.
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DOI:
10.1038/s41467-021-25516-4
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发表时间:
2021-09-15
影响因子:
16.6
通讯作者:
Crona B
Crona B
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Naylor RL;Kishore A;Sumaila UR;Issifu I;Hunter BP;Belton B;Bush SR;Cao L;Gelcich S;Gephart JA;Golden CD;Jonell M;Koehn JZ;Little DC;Thilsted SH;Tigchelaar M;Crona B

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许多研究都集中在扩大“蓝色食品”生产的必要性上,“蓝色食品”被定义为在海洋和淡水系统中捕获或种植的水产食品,以满足不断增长的人口和收入驱动的需求。在这里,我们分析了经济,人口和地理因素以及偏好在形成蓝色食品需求方面的作用,使用来自粮农组织和世界银行的二手数据,来自已发布模型的参数以及国家到次国家规模的案例研究。我们的研究结果表明,当使用总的鱼类指标时,全球人均收入和消费之间的横截面关系较弱。按鱼类种群分类显示出不同的地理模式,例如,中国淡水鱼消费量高,加纳和秘鲁中上层鱼类消费量高,在这两个国家,这些鱼类供应广泛、价格低廉,而且是传统食用鱼类。我们预测,假设水产养殖产量持续增长,鱼类真实的价格不变,到本世纪中叶,全球鱼类需求将几乎翻一番。我们的研究得出结论,需求增加的营养和环境后果将取决于国家饮食中鱼类和其他动物源食品的替代。全球对“蓝色食品”的需求正在增长。在这份定量综合报告中,作者分析了全球海产品需求,并预测了2050年的趋势,发现财富与消费之间的关系存在相当大的区域差异。
Numerous studies have focused on the need to expand production of ‘blue foods’, defined as aquatic foods captured or cultivated in marine and freshwater systems, to meet rising population- and income-driven demand. Here we analyze the roles of economic, demographic, and geographic factors and preferences in shaping blue food demand, using secondary data from FAO and The World Bank, parameters from published models, and case studies at national to sub-national scales. Our results show a weak cross-sectional relationship between per capita income and consumption globally when using an aggregate fish metric. Disaggregation by fish species group reveals distinct geographic patterns; for example, high consumption of freshwater fish in China and pelagic fish in Ghana and Peru where these fish are widely available, affordable, and traditionally eaten. We project a near doubling of global fish demand by mid-century assuming continued growth in aquaculture production and constant real prices for fish. Our study concludes that nutritional and environmental consequences of rising demand will depend on substitution among fish groups and other animal source foods in national diets. Global demand for “blue food” is growing. In this quantitative synthesis, the authors analyse global seafood demand and project trends to 2050, finding considerable regional variation in the relationship between wealth and consumption.
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