

Phylum level analysis Proteobacteria was the dominant gut bacteria of fish in both adult and juvenile fish from two separate lakes. Gut microbial abundance of juvenile fish in Chagan lake was significantly higher than that of other groups. The results showed that fish in different lakes or ages contained specific microbiota, the gut microbial structure was similar, but the microbial content was significantly different.

nobilis) from Chagan lake and Xinlicheng reservoir were selected, and divided into four groups to compare the differences of gut microbial communities, free amino acid and fatty acids in muscle. At present, it has been found that the gut microbial community may be involved in the regulation of host material anabolism. Fish is favored by consumers, while amino acids and fatty acids are the main nutrients of muscle.
