Effects of iced trash fish and formulated diet on growth performance, intestinal structure and microflora diversity of marbled flounder (Pseudopleuronectes yokohamae)
XU Xiaoying, WANG He, LI Xiumei, ZHAO Yanning, ZHANG Ning, SHI Wenkai, LIU Peng*
1.Yantai Marine Economic Research Institute，Yantai 264006，China；2.Yantai Zongzhe Ocean Technology Company Limited，Yantai 265617，China
Abstract: In order to evaluate effects of iced trash fish, formulated diet and their mixture on growth, intestinal structure and microflora of marbled flounder (Pseudopleuronectesyokohamae), the same batch of marbled flounder juveniles with body length of (10.16±0.06)cm were reared in a 126 L plastic tank and fed iced trash fish, formulated diet and their mixture at water temperature of (15±1)℃ for 42 days. The results showed that the fish fed iced trash had significant increase in the body weight gain and specific growth rate (P<0.05), and decrease in the feed conversion ratio (P<0.05). The intestinal histological structure showed that the length of intestinal villi and the thickness of basal layer were significantly increased in the fish fed iced trash (P<0.05). The intestinal microflora analysis showed that the fish fed iced trash had increase in the intestinal flora diversity, promoting the distribution of beneficial bacteria such as Rhodobacteraceae in the intestinal tract of marbled flounder. It was speculated that the marbled flounder fed formulated diet had slower growth may be involved in the poorly developed intestinal mucosa and the decline in the ratio of Bacteroides to Firmicutes. The indices in the mixed diet group were mediated between iced trash fish group and formulated feed group. Therefore, beneficial bacteria in Rhodobacteraceae were added in diet to promote the growth and nutrient absorption of marbled flounder during cultivation. The artificial compound feed of marbled flounder should be further optimized to improve market advantage.
徐晓莹, 王鹤, 李秀梅, 赵延宁, 张宁, 史文凯, 刘蓬. 投喂冰鲜杂鱼和配合饲料对钝吻黄盖鲽生长性能、肠道结构及菌群多样性的影响[J]. 大连海洋大学学报, 2023, 38(2): 217-222.
XU Xiaoying, WANG He, LI Xiumei, ZHAO Yanning, ZHANG Ning, SHI Wenkai, LIU Peng. Effects of iced trash fish and formulated diet on growth performance, intestinal structure and microflora diversity of marbled flounder (Pseudopleuronectes yokohamae). Journal of Dalian Ocean University, 2023, 38(2): 217-222.
2023, Vol. 38 
