New insights on the effects of in-pond raceway aquaculture system (IRAS) with dietary rhubarb extracts on the fresh meat quality of Megalobrama amblycephala

文献类型： 外文期刊

第一作者： Lin, Yan

作者： Lin, Yan;Miao, Linghong;Sun, Cunxin;Zhou, Qunlan;Liu, Bo;Ge, Xianping;Lin, Yan;Miao, Linghong;Sun, Cunxin;Zhou, Qunlan;Liu, Bo;Ge, Xianping;Miao, Linghong;Jiang, Wenqiang;Zhou, Qunlan;Liu, Bo;Ge, Xianping;Liu, Bo;Ge, Xianping

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关键词： Megalobrama amblycephala; In-pond raceway aquaculture system; Rhubarb extracts; Fresh meat quality

期刊名称：AQUACULTURE （ 影响因子：5.135； 五年影响因子：5.125 ）

ISSN： 0044-8486

年卷期： 2022 年 560 卷

页码：

收录情况： SCI

摘要： Numerous studies have shown that in-pond raceway aquaculture system (IRAS) is the future of industrialized and large-scale pond culture, and rhubarb extracts have been proved to improve immunity, resist stress and regulate lipid metabolism. This study sought to investigate the difference between the IRAS (7.0 kg/m3) and traditional pond (0.52 kg/m3) in the fresh meat quality of Megalobrama amblycephala, and further the role of dietary rhubarb extracts on fish in IRAS. M. amblycephala (220-250 g) were raised in three different conditions: IRAS group: IRAS (7.0 kg/m3) culture fed with a normal formulated diet, IRAS-R group: IRAS (7.0 kg/m3) culture fed with a functional diet containing 0.05% rhubarb extracts, TP-R group: traditional pond (0.52 kg/m3) culture fed a functional diet containing 0.05% rhubarb extracts. The fresh meat quality indicators were analyzed after four months of breeding. The electronic nose analyses elucidated differences in the odor of the raw fish from the three examined groups. Specifically, out of the 68 volatile flavor compounds identified in the three groups (including ketones, aldehydes, acids, alkanes, and alcohols), 41 were detected in the TP-R group, 44 in the IRAS-R group, and 54 in the IRAS group. The aldehydes were the main contributor to fishy odor in the fresh meat of M. amblycephala, and the main aldehyde in three groups was hexanal, the contents were all higher than 8500 mu g/ kg. IRAS-R group resulted in a significant increase in ketones compared to TP-R group (1322.28 mu g/kg) and IRAS group (1228.36 mu g/kg), reaching a total content of 2997.44 mu g/kg, which was mainly composed of 2,3-octane-dione, 2,3-pentanedione, 3,5-octadien-2-one, non-3,5-dien-2-one, and 3-octen-2-one. IRAS improved the shear force, total amino acids, essential amino-acid, adenosine monophosphate (AMP), hypoxanthine ribonucleoside (HxR), and decreased the crude lipid, saturated fatty acid, guanosine monophosphate (GMP) of M. amblycephala meat compared with traditional pond (P < 0.05). IRAS with dietary rhubarb extracts further enhance shear force, and the content of delicious amino acids, unsaturated fatty acids (UFAs), co-3 unsaturated fatty acids (e.g., EPA + DHA), co-6 unsaturated fatty acids, and UFA/SFA (unsaturated fatty acids/saturated fatty acids) ratios compared with IRAS group(P < 0.05). Therefore, this study provides important insights into the effects of IRAS and rhubarb extracts on fish meat quality and establishes a methodological framework for the evaluation of how different culture systems and plant-based supplements affect muscle characteristics.

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