We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Effects of different temperatures on growth and intestinal microbial composition of juvenile Eriocheir sinensis
Summary
Researchers examined how different water temperatures affect the growth and intestinal microbial composition of juvenile Chinese mitten crabs (Eriocheir sinensis), finding that temperature-driven changes in gut microbiota composition influence crab development.
The change in temperature will change the composition of intestinal microorganisms of juvenile Eriocheir sinensis, and the composition of intestinal microorganisms will affect the growth and development of juvenile crabs. In order to explore the relationship between intestinal microorganisms and growth of E. sinensis at different temperatures, the status of growth and intestinal microflora of juvenile E. sinensis reared at different water temperatures (15 °C, 23 °C, and 30 °C) were compared in this study. The results showed that the respective survival rate of juvenile E. sinensis in the three water temperature groups was 100%, 87.5%, and 64.44%. Moreover, the molting rate increased with an increase in water temperature, which was at 0%, 10%, and 71.11% for the three respective temperature groups. The average weight gain rate showed an overall increasing trend with the increase of water temperature. Moreover, the final fatness of the crabs in the 30 °C water temperature group was significantly lower than that in the 15 °C and 23 °C groups (p < 0.05); there was no significant difference in the liver-to-body ratio among the three groups. The results of the alpha diversity analysis of the 16S rRNA data revealed that there was no significant difference in the intestinal microbial abundance among the three water temperature groups; however, the intestinal microbial diversity in the 23 °C water temperature group was significantly lower than that in the 15 °C and 30 °C groups. At the phylum level, the dominant flora of the three groups was Firmicutes, Proteobacteria, and Bacteroidota. At the genus level, the abundance of Parabacteroides and Aeromonas in the intestine of the crabs in the 30 °C water temperature group was significantly higher than that in the 15 °C and 23 °C groups (p < 0.05). The function prediction showed that the main functional diversity of intestinal microflora of juvenile E. sinensis in the three water temperature groups was similar and mainly involved in metabolic-related functions, but there were still differences in the effects of water temperature on functional pathways such as metabolism, immunity, and growth among each group, either promoting or inhibiting. In conclusion, different water temperatures can affect the composition and function of intestinal flora of E. sinensis, and 23 °C-30 °C is the optimal water temperature for the growth of juvenile E. sinensis.
Sign in to start a discussion.
More Papers Like This
Early Succession of Community Structures and Biotic Interactions of Gut Microbes in Eriocheir sinensis Megalopa after Desalination
This is not about microplastics — it is an aquaculture biology study tracking how gut microbial communities develop and change in juvenile Chinese mitten crab (Eriocheir sinensis) during their transition from saltwater to freshwater during the desalination phase of aquaculture.
Insights into the Gut Microbiota of the Freshwater Crab Sinopotamon planum across Three Seasons and Its Associations with the Surrounding Aquatic Microbiota
Researchers characterized the gut microbiota of freshwater crab Sinopotamon planum across three seasons, finding seasonal shifts in microbial community composition that correlated with changes in surrounding aquatic microbiota and environmental conditions.
Effects of microplastics on the innate immunity and intestinal microflora of juvenile Eriocheir sinensis
Researchers exposed juvenile Chinese mitten crabs to different concentrations of microplastics for up to 21 days and measured immune responses and gut microbiome changes. They found that microplastic exposure disrupted immune enzyme activities and altered the composition of intestinal bacteria, with effects intensifying at higher concentrations and longer exposure times. The study suggests that microplastic pollution may compromise the immune health and gut ecology of freshwater crustaceans.
Effects of diurnal temperature fluctuations on growth performance, energy metabolism, stress response, and gut microbes of juvenile mud crab Scylla paramamosain
A 51-day experiment with juvenile mud crabs Scylla paramamosain exposed to varying levels of daily temperature fluctuation found that larger fluctuations reduced survival, suppressed growth, disrupted energy metabolism, and altered gut microbiota composition. The results indicate that daily temperature variability, a key aspect of climate change, represents a significant physiological stressor for commercially important crustaceans.
Effects of Florfenicol on Intestinal Histology, Apoptosis and Gut Microbiota of Chinese Mitten Crab (Eriocheir sinensis)
Researchers investigated the effects of the antibiotic florfenicol on intestinal health and gut microbiota in Chinese mitten crabs. The study found that florfenicol exposure caused significant intestinal tissue damage, immune responses, and disruption of gut microbial communities, with high concentrations notably decreasing microbial diversity after 14 days of exposure.