Abstract
BackgroundFish is favored by consumers, while amino acids and fatty acids are the main nutrients of muscle. At present, it has been found that the gut microbial community may be involved in the regulation of host material anabolism. Juvenile and adult bighead carp (A. 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.ResultsThe 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. Gut microbial abundance of juvenile fish in Chagan lake was significantly higher than that of other groups. Phylum level analysis Proteobacteria was the dominant gut bacteria of fish in both adult and juvenile fish from two separate lakes. Actinobacteria was another dominant bacterial phylum in juvenile fish in both lakes. Contents of free amino acids and fatty acids in muscle were detected, and the relationships between them and gut microbial communities were analyzed. Bighead carp grew from juvenile to adult, Actinobacteria abundance decreased (P < 0.05) and Proteobacteria increased (P < 0.05). Proteobacteria was positively correlated with the contents of Thr, Lys, Pro, Asp, Gly and Glu, Actinobacteria was negatively correlated with Met and His. Meanwhile, EPA and DHA were positively correlated with Proteobacteria, EPA and DHA were not significantly associated with Actinobacteria.ConclusionIt was speculated that the contents of free amino acids and fatty acids in muscle might be affected by the difference of gut microbiota, thus affecting the taste and nutritional quality.
Highlights
Bighead carp (Aristichthys nobilis), together with black carp (Mylopharyngodon piceus), grass carp(Ctenopharyngodon idellus) and silver carp (Hypophthalmichthys molitrix) is the main economicallyLu et al BMC Microbiology (2022) 22:32 such as texture, the amount of water, ions, amino acids, fatty acids [4].The gut tract of an animal is a complex ecosystem with a huge microbial community
Contents of free amino acids in muscle Amino acids are the smallest units of proteins, and protein is the main component of muscle
The results showed that Proteobacteria was positively correlated with Thr, Lys, Pro, Asp, Gly and Glu content, Actinobacteria was negatively correlated with Met and His
Summary
Bighead carp (Aristichthys nobilis), together with black carp (Mylopharyngodon piceus), grass carp(Ctenopharyngodon idellus) and silver carp (Hypophthalmichthys molitrix) is the main economicallyLu et al BMC Microbiology (2022) 22:32 such as texture, the amount of water, ions, amino acids, fatty acids [4].The gut tract of an animal is a complex ecosystem with a huge microbial community. Gut microbial communities convert food into various nutrients for the host body, and the host provides a suitable environment and food energy to microbial communities. Gut microbial communities regulated substance metabolism, tissue and organ development [12], and immune system maturation [13, 14] by changing host genes expression genes. Gut microbial communities helps digest food but facilitate mucosal immunity [15], host-derived probiotics Enterococcus casseliflavus improve resistance against Streptococcus iniae infection in Oncorhynchus mykiss via immunomodulation [16]. Fish is favored by consumers, while amino acids and fatty acids are the main nutrients of muscle. Juvenile and adult bighead carp (A. 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
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
