Variations in output and the off-flavor compounds geosmin and 2-methylisoborneol in different tilapia cultivation systems

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 罗非鱼不同养殖系统对产出效果及异味物质含量的影响 DOI: 作者: 作者单位: 1. 上海海洋大学省部共建水产种质资源发掘与利用教育部重点实验室, 上海 201306;2. 通威股份有限公司, 四川 成都 610041;3. 宁波检验检疫科学技术研究院, 浙江 宁波 315012 作者简介: 张凯(1992-),男,专业硕士研究生,研究方向为鱼类生态养殖技术.E-mail:mkaizhang@sina.com 通讯作者: 中图分类号: S96 基金项目: 欧盟委员会第七框架协议项目（222889）；通威股份有限公司合作项目. Variations in output and the off-flavor compounds geosmin and 2-methylisoborneol in different tilapia cultivation systems Author: Affiliation: 1. Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education;Shanghai Ocean University, Shanghai 201306, China;2. Tongwei Group Co. Ltd, Chengdu 610041, China;3. Ningbo Academy of Inspection and Quarantine of China, Ningbo 315012, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:对鱼菜共生系统、底排污系统、底排污+鱼菜共生3种养殖系统的水质变化和罗非鱼产出效果进行了分析，并利用微波蒸馏-吹扫捕集-气相色谱质谱联用技术检测了各系统水体中和罗非鱼肌肉中异味物质的含量变化。经过12周的养殖实验，对终重、生物量、特定生长率、饵料系数、增重率等指标进行测量比较，结果发现，罗非鱼的产出效果从优到差依次为：鱼菜共生组、底排污+鱼菜共生组、底排污组、对照组；底排污+鱼菜共生系统水体中溶解氧在各时期均最高，其亚硝氮、氨氮含量在各时期均最低；底排污或鱼菜共生系统均能有效降低养殖水体中异味物质2-MIB和GSM含量；对照组罗非鱼肌肉中异味物质含量最高，2-MIB和GSM分别达到（0.67±0.02）μg/kg和（0.870±0.018）μg/kg，而底排污+鱼菜共生组罗非鱼肌肉中异味物质含量在各时期最低，2-MIB和GSM分别为（0.31±0.02）μg/kg和（0.53±0.042）μg/kg。结果表明，在罗非鱼精养池塘中，可通过底排污和鱼菜共生结合，降低水体中和罗非鱼体内异味物质的累积，提高其经济价值。 Abstract:This study compared the effects of four different tilapia cultivation systems (a tilapia-water spinach integrated system, a sewage discharging system, a sewage discharging and tilapia-water spinach integrated system, and a tilapia monoculture system as a control) on the variations in water quality, tilapia production, and off-flavor contents in water and tilapia in June, July, and August 2016. Using gas chromatography and mass spectrometry (GC-MS) based on microwave-assisted distillation followed by purge-and-trap, the off-flavor compounds geosmin (GSM) and 2-methylisoborneol (2-MIB) were determined in water and tilapia tissue. The results showed that production in the tilapia-water spinach integrated system was the highest among the systems examined (<0.05). The contents of ammonia nitrogen and nitrite in the sewage discharging and tilapia-water spinach integrated system were significantly lower compared with the control group[(0.67±0.02) μg/kg and (0.870±0.018) μg/kg]. In addition, the concentrations of 2-MIB and GSM in the muscle of tilapia in the sewage discharging and tilapia-water spinach integrated system[(0.31±0.02) μg/kg and (0.53±0.042) μg/kg] were significantly lower than those in the control group[(0.67±0.02) μg/kg and (0.870±0.018) μg/kg, respectively]. These results indicate that the sewage discharging and tilapia-water spinach integrated system reduced the accumulation of off-flavor compounds in water and tilapia muscle in an intensive tilapia farming system. 参考文献 相似文献 引证文献