Pearl River Fisheries Research Institute’s Fishery Resources Ecology Laboratory team has made new progress in the study of digestive and physiological strategies during the reproductive migration of river migratory fish. Related results”The gut microbiome composition and degradation enzymesactivity of black Amur bream (Megalobrama terminalis) inresponse to breeding migratory behavior” were published in the international academic journal”Ecology and Evolution”. The first author of the article is Liu Yaqiu, assistant researcher, Li Xinhui The researcher and Li Jie specially appointed researcher as the co-corresponding author. The article link is https://doi.org/10.1002/ece3.7407.
The reproductive migration process is an active, regularly oriented, high-energy-consuming exercise. The fish’s own energy reserves are limited and may face risks such as energy shortage during the migration process. Therefore, fish migration needs to adjust their body structure and energy as much as possible. Reserve and metabolism capacity to meet the needs of migration. Not all individuals of migratory fish are involved in migration, and the growth, osmotic pressure regulation ability, sexual maturity status and energy metabolism level of the migratory type and the colonized type are significantly different. The intestinal microbial community of fish is usually used as the basis of its metabolic capacity and participates in the regulation of many important physiological functions of fish. The study took the river migratory fish Canton bream as the object, and revealed the obvious difference between the intestinal flora diversity of the migratory and non-migratory Canton bream populations, and found that this difference in the dominant flora is closely related to its intestinal digestion and degradation enzymes. At the same time, the study also found that the amino acid metabolism and lipid metabolism of the intestinal flora of the migratory Guangdong bream population were significantly higher than those of the non-migratory Guangdong bream population, and proposed that the river migratory fish Guangdong bream provides sufficient energy for reproductive migration and can adapt to changes. Feeding habits, a key physiological strategy for digesting more nutritious foods.