On-site biofouling removal enhances the nutritional and gustatory quality of oysters from suspension aquaculture and the recovery of essential biomolecules for human consumption

IF 3.7 2区农林科学 Q1 FISHERIES

Aquaculture Reports Pub Date : 2025-10-01 DOI:10.1016/j.aqrep.2025.103129

Yuji Hatakeyama , Chikako Maruo , Megumu Fujibayashi , Ramon Filgueira , Takashi Sakamaki

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Abstract

We experimentally tested the effects of on-site biofouling removal (BR) via heat treatment on the biomolecule contents of Pacific oysters and the bay-scale recovery of these biomolecules through the harvest of farmed oysters from suspension aquaculture in a temperate bay. At harvest after an 18-month cultivation period, oysters treated at the 13th month showed 18 % higher soft body weights and increased contents of certain biomolecules compared to untreated (UN) oysters. Specifically, BR oysters had 15 % higher eicosapentaenoic acid (EPA) content and 13 % higher docosahexaenoic acid (DHA) content than UN oysters. The glycogen content of BR oysters was 54 % higher, suggesting enhanced energy storage and potentially improved sweetness. BR likely reduced food competition between oysters and fouling organisms, predominantly mussels, leading to the higher biomolecule contents. If BR were expanded to cover the entire bay (from the current 10–100 %), the recovery of EPA and DHA through the harvest of farmed oysters would increase by 28 %, reaching 869 kg in a 1.5-year production cycle. Biofouling removal (BR) did not significantly affect the content of essential amino acids (AAs), gustatory-related AAs, or taurine in oysters. However, due to improved oyster biomass production, BR is estimated to potentially increase the recovery of these biomolecules by approximately 12 %. In conclusion, on-site BR is a straightforward and effective method for enhancing the levels of certain nutritional and gustatory-related biomolecules in cultivated oysters while simultaneously increasing the recovery of nutritionally important biomolecules for human consumption.

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现场去除生物污垢可提高悬浮养殖牡蛎的营养和口感品质，并恢复人类食用的必需生物分子

本研究以温带海湾悬浮养殖牡蛎为研究对象，研究了热处理现场生物污垢去除（BR）对太平洋牡蛎生物分子含量的影响，以及这些生物分子在海湾尺度上的恢复情况。在18个月的培养期后收获时，与未处理（UN）的牡蛎相比，在第13个月处理的牡蛎的软体重量增加了18% %，某些生物分子的含量也增加了。其中，BR牡蛎的二十碳五烯酸（EPA）含量比UN牡蛎高15 %，二十二碳六烯酸（DHA）含量比UN牡蛎高13 %。BR牡蛎的糖原含量高出54% %，表明能量储存增强，并可能改善甜味。BR可能减少了牡蛎和污染生物（主要是贻贝）之间的食物竞争，导致更高的生物分子含量。如果将BR扩大到整个海湾（从目前的10-100 %），通过养殖牡蛎收获的EPA和DHA的回收率将增加28 %，在1.5年的生产周期内达到869 公斤。生物污垢去除（BR）对牡蛎中必需氨基酸（AAs）、味觉相关AAs或牛磺酸的含量没有显著影响。然而，由于牡蛎生物量产量的提高，BR估计有可能使这些生物分子的回收率提高约12% %。综上所述，现场生物反应器是一种简单有效的方法，可以提高养殖牡蛎中某些营养和味觉相关生物分子的水平，同时增加人类食用的重要营养生物分子的回收率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aquaculture Reports Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

5.90

自引率

8.10%

发文量

469

审稿时长

77 days

期刊介绍： Aquaculture Reports will publish original research papers and reviews documenting outstanding science with a regional context and focus, answering the need for high quality information on novel species, systems and regions in emerging areas of aquaculture research and development, such as integrated multi-trophic aquaculture, urban aquaculture, ornamental, unfed aquaculture, offshore aquaculture and others. Papers having industry research as priority and encompassing product development research or current industry practice are encouraged.