Developing the seaweed and plant components of integrated multi-trophic aquaculture and aquaponics and their applications within a biorefinery approach

开发综合多营养水产养殖和鱼菜共生的海藻和植物成分及其在生物精炼方法中的应用

• 批准号: RGPIN-2016-05550
• 负责人: Chopin, Thierry
• 金额: $ 2.26万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746015
• 关键词: Developing; seaweed; plant; components; integrated

Aquaculture will have an increasing share in tomorrow's food production systems. However, the Blue Revolution needs to become greener by developing innovative technologies and practices with increased environmental sustainability, economic stability and societal acceptability, such as Integrated Multi-Trophic Aquaculture (IMTA). With IMTA, farmers cultivate species from different trophic levels with complementary ecosystem functions. They combine fed species (fish) with extractive species (seaweeds, aquatic plants, shellfish and other invertebrates) to take advantage of synergistic interactions among them, while biomitigation operates. During this Discovery Grant we will work on three improvements of IMTA systems.Developing the cultivation of the seaweed Palmaria palmata (dulse) as a summer inorganic extractive component of an IMTA systemWe developed the cultivation of kelps as the inorganic extractive component, from fall until early summer. But the need to increase biomitigation during summer led us to investigate the possibility of cultivating dulse. While dulse has been harvested for human consumption for centuries, its large-scale cultivation has never been successful. The problem is that dulse has a complex life cycle and individuals are most of the time non-reproductive, suggesting there may be an unknown asexual phase. We will investigate this possibility using molecular and spectroscopic markers. This could simplify cultivation by eliminating the need for sexual reproduction to create multiple generations in culture, thereby reducing pressure on natural populations.Developing freshwater IMTAThe IMTA concept is not confined to marine systems. Its principles can also be applied to land-based, closed-containment freshwater systems (FIMTA, or aquaponics). If salmon spend 1.5-2 years in seawater pens, it is after they have spent 1-1.5 years in freshwater hatcheries. Developing FIMTA will aid in reducing water usage and waste production, and in product diversification. Using plants to reduce phosphorus levels in effluents will help farmers meet water quality guidelines and prevent eutrophication in the environment. People often describe aquaponics as the combination of animal aquaculture and plant cultivation. However, there is a key microbial link between the two, about which very little is known. We will identify these microbial communities, their changes over time and their role in nutrient cycling.Adding value to seaweeds through the Integrated Sequential Biorefinery (ISBR) approachBusiness models have to evolve from the “one species - one process - one product” approach to embrace the ISBR “one species - several processes several products” concept, in which the residues of one process become the valuable products of the next step. We will develop several analytical and bioactivity platforms to transform seaweed residues into valuable new products.

水产养殖将在未来的粮食生产系统中占有越来越大的份额。然而，蓝色革命需要通过开发具有更强的环境可持续性、经济稳定性和社会可接受性的创新技术和做法来变得更加绿色，例如综合多营养水产养殖(IMTA)。通过IMTA，农民从不同的营养水平培育具有互补生态系统功能的物种。它们将被摄食的物种(鱼)和提取的物种(海藻、水生植物、贝类和其他无脊椎动物)结合在一起，以利用它们之间的协同作用，同时进行生物改良。在这项探索基金期间，我们将致力于IMTA系统的三项改进。将海藻Palmaria palmata(Dulse)的栽培作为IMTA系统的夏季无机提取物成分我们开发了海带作为无机提取物成分的栽培，从秋季到初夏。但为了在夏季增加生物杀菌的需要，我们研究了培养Dulse的可能性。虽然几个世纪以来，人们一直在收获杜勒斯供人类食用，但它的大规模种植从未成功过。问题是，Dulse有一个复杂的生命周期，个体大部分时间都是非生殖性的，这表明可能存在一个未知的无性阶段。我们将使用分子和光谱标记来研究这种可能性。这可以通过消除在养殖中创造多个世代的有性繁殖的需要来简化养殖，从而减少对自然种群的压力。开发淡水IMTATA的概念并不局限于海洋系统。它的原理也可以应用于陆基、封闭式淡水系统(FIMTA或Aquaponics)。如果鲑鱼在海水围栏里呆了1.5-2年，那是在它们在淡水孵化室里呆了1-1.5年之后。发展FIMTA将有助于减少用水量和废物产生，并有助于产品多样化。利用植物降低污水中的磷水平将有助于农民达到水质标准，并防止环境中的富营养化。人们经常将水培描述为动物水产养殖和植物栽培的结合。然而，这两者之间有一个关键的微生物联系，人们对此知之甚少。我们将确定这些微生物群落，它们随时间的变化以及它们在营养循环中的作用。通过集成顺序生物精炼(ISBR)方法为海藻增值商业模式必须从“一种-一种过程-一种产品”方法演变为接受ISBR“一种-几种过程几种产品”的概念，在这种概念中，一个过程的残留物成为下一步有价值的产品。我们将开发几个分析和生物活性平台，将海藻残渣转化为有价值的新产品。