Marine Biology and Ecology Research Centre, University of Plymouth, Plymouth, UK.
Nitte University Centre for Science Education and Research (NUCSER), Nitte (Deemed to be University), Mangaluru, India.
Microbiologyopen. 2021 Mar;10(2):e1179. doi: 10.1002/mbo3.1179.
Little is known about the functions of the crustacean gut microbiome, but environmental parameters and habitat are known to affect the composition of the intestinal microbiome, which may in turn affect the physiological status of the host. The mud crab Scylla serrata is an economically important species, and is wild-caught, and farmed across the Indo-Pacific region. In this study, we compared the composition of the gut microbiome (in terms of gut microbial species richness and abundance) of S. serrata collected from wild sites, and farms, from the east and west coast of India, and also tested the effects of the environment on the composition. The water temperature had a statistically significant effect on gut microbiome composition, with microbial biodiversity decreasing with increasing water temperature. This could have negative effects on both wild and farmed mud crabs under future climate change conditions, although further research into the effects of temperature on gut microbiomes is required. By comparison, salinity, crab mass and carapace width, geographical location as well as whether they were farmed or wild-caught crabs did not have a significant impact on gut microbiome composition. The results indicate that farming does not significantly alter the composition of the gut microbiome when compared to wild-caught crabs.
甲壳动物肠道微生物组的功能知之甚少，但已知环境参数和栖息地会影响肠道微生物组的组成，而肠道微生物组的组成又可能反过来影响宿主的生理状态。泥蟹（Scylla serrata）是一种具有重要经济价值的物种，在印度-太平洋地区被野生捕捞和养殖。在本研究中，我们比较了来自印度东、西海岸野生和养殖地点的泥蟹肠道微生物组（在肠道微生物物种丰富度和丰度方面）的组成，并测试了环境对其组成的影响。水温对肠道微生物组的组成有统计学上的显著影响，随着水温的升高，微生物多样性降低。这可能对未来气候变化条件下的野生和养殖泥蟹都有负面影响，尽管需要进一步研究温度对肠道微生物组的影响。相比之下，盐度、蟹体质量和甲壳宽度、地理位置以及是养殖还是野生捕捞的蟹对肠道微生物组的组成没有显著影响。研究结果表明，与野生捕捞的蟹相比，养殖不会显著改变肠道微生物组的组成。
