闫莉, 李慷, KAMALAGharti Chetri, 鲁强, 徐岩, 刘如聪, 王桂香, ABDOULGadiri Sow, 刘利平. 两种养殖模式中草鱼土腥味特征性物质累积变化[J]. 南方水产科学, 2022, 18(3): 147-154. DOI: 10.12131/20210167
引用本文: 闫莉, 李慷, KAMALAGharti Chetri, 鲁强, 徐岩, 刘如聪, 王桂香, ABDOULGadiri Sow, 刘利平. 两种养殖模式中草鱼土腥味特征性物质累积变化[J]. 南方水产科学, 2022, 18(3): 147-154. DOI: 10.12131/20210167
YAN Li, LI Kang, KAMALA Gharti Chetri, LU Qiang, XU Yan, LIU Rucong, WANG Guixiang, ABDOUL Gadiri Sow, LIU Liping. Cumulative changes of off-flavor compounds of grass carp in two culture systems[J]. South China Fisheries Science, 2022, 18(3): 147-154. DOI: 10.12131/20210167
Citation: YAN Li, LI Kang, KAMALA Gharti Chetri, LU Qiang, XU Yan, LIU Rucong, WANG Guixiang, ABDOUL Gadiri Sow, LIU Liping. Cumulative changes of off-flavor compounds of grass carp in two culture systems[J]. South China Fisheries Science, 2022, 18(3): 147-154. DOI: 10.12131/20210167

两种养殖模式中草鱼土腥味特征性物质累积变化

Cumulative changes of off-flavor compounds of grass carp in two culture systems

  • 摘要: 为探究养殖模式对草鱼 (Ctenopharyngodon idella) 养殖水体和肌肉中土腥味物质含量的影响,研究了池塘内循环跑道养殖系统 (In-pond raceway system, IPRS) 与传统养殖模式对草鱼中土腥味特征性物质土臭素 (Geosmin, GSM) 和二甲基异莰醇 (2-methylisoborneol, 2-MIB) 累积的影响。通过对不同养殖模式中水体和草鱼肌肉中2-MIB、GSM的动态检测,探究养殖过程中影响土腥味物质累积的因素。结果表明,IPRS水体和鱼肉的2-MIB随养殖时间的延长显著上升,GSM呈现相同的逐步累积趋势,且鱼肉中这2种特征性土腥味物质的变化趋势与水体一致。传统养殖模式下,水体中2-MIB含量逐渐增加,鱼肉中的2-MIB含量在实验末期显著高于实验初期和中期;水体中GSM的变化差异不显著,鱼肉与水体的GSM含量变化趋势一致,但不同时期鱼肉中的GSM含量差异显著 (P<0.05),且实验末期达最大值。相关性分析表明,土腥味物质的累积量与草鱼体质量、体长呈正相关。综上,养殖水体和草鱼肌肉中土腥味物质的累积受养殖模式影响,规格为0.42~1.23 kg的草鱼的土腥味特征性物质累积速率更快。

     

    Abstract: In order to investigate the influence of culture systems on the accumulation of off-flavor substances in the aquaculture water and grass carp (Ctenopharyngodon idella), we studied the accumulation of geosmin (GSM) and 2-methylisoborneol (2-MIB) in the fish in the in-pond raceway system (IPRS) and the traditional culture system. We dynamicaclly detected the contents of the two compounds in the water and fish muscles in different culture systems and applied the Pearson analysis. The results show that the 2-MIB concentration in the water and fish muscle in the IPRS system increased significantly with the extension of aquaculture time. The GSM concentration also showed a gradual accumulation trend, and the changes in the concentrations of the two compounds in the muscle remained consistent with those in the water. In the traditional pond system, the concentration of 2-MIB gradually increased without significant difference, and the fish muscle had significantly higher concentration at the end of the experiment than at previous stages. The GSM concentration of both pond water and fish muscle first decreased and then increased. Correlation analysis shows that the accumulation of both GSM and 2-MIB was positively correlated with fish body mass and length. In conclusion, the accumulation of off-flavor compounds in pond water and fish muscle is affected by the culture system. Grass carp with body mass of 0.42–1.23 kg accumulates off-flavor compounds faster.

     

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