Microbial Community Structure and Metabolic Characteristics of Intestine and Gills of Dwarf-Form Populations of Sthenoteuthis oualaniensis in South China Sea

Sthenoteuthis oualaniensis is an important biological resource in the South China Sea. However, microbiological characteristics of this squid, especially those dwarf-form, are poorly understood. This study was conducted to analyze microbial community structure and metabolic intestinal gill tissues dwarf-form populations S. oualaniensis. The squids different sexes gonadal maturities were collected from Sea spring 2020. Results showed that Mycoplasma most dominant group bacteria samples females with immature gonads (FN), at sexual maturity (FY), males (MY) second-highest relative abundance (MN). squid gills differed flora. BD1-7 clade genus all groups. Furthermore, activities higher than groups, FYG. larger had communities more robust utilization carbon sources, assessed via average well color development (AWCD). Correlation redundancy analysis determined AWCD significantly positively correlated (p < 0.05). results indicated between maturities. Moreover, potential populations.