为了研究鱼露快速发酵生产工艺,以秋刀鱼为原料,采用加曲适量保温的方式生产鱼露,通过单因素实验探讨不同因素(发酵周期、温度、固液比、加盐量、加曲量)对鱼露发酵生产的影响,并在此基础上进行正交实验工艺优化,结果表明,在发酵周期30 ...为了研究鱼露快速发酵生产工艺,以秋刀鱼为原料,采用加曲适量保温的方式生产鱼露,通过单因素实验探讨不同因素(发酵周期、温度、固液比、加盐量、加曲量)对鱼露发酵生产的影响,并在此基础上进行正交实验工艺优化,结果表明,在发酵周期30 d时,鱼露发酵液中氨基酸态氮含量维持稳定,表明鱼肉组织基本分解完全,最佳发酵工艺条件为:温度30℃、固液比1∶0.6、加曲量5%、加盐量12%。在此条件下制得的鱼露氨基酸态氮含量(0.97±0.02)g/100 m L,可溶性固形物含量23%±0.51%,感官评分88分,鱼露颜色棕红至橙红,无异味,富有鱼露特殊香气,达到快速生产鱼露目的。展开更多
The Pacific saury Cololabis saira is a commercially important pelagic species with wide distribution in the North Pacific Ocean. Previous studies identified two geographical groups by comparing the radius of otolith a...The Pacific saury Cololabis saira is a commercially important pelagic species with wide distribution in the North Pacific Ocean. Previous studies identified two geographical groups by comparing the radius of otolith annual rings(ROA) of the fish collected during the pre-fishing season. Moreover, understanding the group composition in the mixed catch from the fishing ground is essential for sustainable exploitation of this species. Using samples collected during the fishing season(July–November) from 2016 to 2018, the potential of applying otolith shape analysis as a tool to identify these two mixed groups was tested in this research. Two otolith morphotypes that belong to the eastern group and western group were identified by K-means cluster analysis using Fourier coefficients and ROA. The high classification success of random forest further confirmed the effectiveness of otolith shape analysis. The western group accounted for the majority of catch in July and August at 160?E. With the passing of sampling time and fishing fleets moving westward, the proportion of eastern group gradually increased and finally reached more than 60% of the whole catch in November at 150°E. This result suggests that the eastern and western groups are well mixed during spawning migration. In addition, the temporal and spatial dynamics of their catch composition provide information for their migration route. This study is helpful for improving fisheries management and understanding the short-term stock fluctuation of Pacific saury.展开更多
文摘为了研究鱼露快速发酵生产工艺,以秋刀鱼为原料,采用加曲适量保温的方式生产鱼露,通过单因素实验探讨不同因素(发酵周期、温度、固液比、加盐量、加曲量)对鱼露发酵生产的影响,并在此基础上进行正交实验工艺优化,结果表明,在发酵周期30 d时,鱼露发酵液中氨基酸态氮含量维持稳定,表明鱼肉组织基本分解完全,最佳发酵工艺条件为:温度30℃、固液比1∶0.6、加曲量5%、加盐量12%。在此条件下制得的鱼露氨基酸态氮含量(0.97±0.02)g/100 m L,可溶性固形物含量23%±0.51%,感官评分88分,鱼露颜色棕红至橙红,无异味,富有鱼露特殊香气,达到快速生产鱼露目的。
基金supported by the National Natural Science Foundation of China (No. 41930534)the Fundamental Research Funds for the Central Universities to Ocean University of China (Nos. 201762015 and 201822027)。
文摘The Pacific saury Cololabis saira is a commercially important pelagic species with wide distribution in the North Pacific Ocean. Previous studies identified two geographical groups by comparing the radius of otolith annual rings(ROA) of the fish collected during the pre-fishing season. Moreover, understanding the group composition in the mixed catch from the fishing ground is essential for sustainable exploitation of this species. Using samples collected during the fishing season(July–November) from 2016 to 2018, the potential of applying otolith shape analysis as a tool to identify these two mixed groups was tested in this research. Two otolith morphotypes that belong to the eastern group and western group were identified by K-means cluster analysis using Fourier coefficients and ROA. The high classification success of random forest further confirmed the effectiveness of otolith shape analysis. The western group accounted for the majority of catch in July and August at 160?E. With the passing of sampling time and fishing fleets moving westward, the proportion of eastern group gradually increased and finally reached more than 60% of the whole catch in November at 150°E. This result suggests that the eastern and western groups are well mixed during spawning migration. In addition, the temporal and spatial dynamics of their catch composition provide information for their migration route. This study is helpful for improving fisheries management and understanding the short-term stock fluctuation of Pacific saury.
