

FOLLOWUS
1.Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
2.Laboratory for Marine Fisheries and Aquaculture, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266072, China
ZHANG Xiumei, xiumei1227@163.com
收稿:2017-03-13,
录用:2017-3-31,
网络首发:2017-05-09,
纸质出版:2018-05
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王琦, 张秀梅, 陈慕雁, 等. Comparison of intestinal microbiota and activities of digestive and immune-related enzymes of sea cucumber
Qi WANG, Xiumei ZHANG, Muyan CHEN, et al. Comparison of intestinal microbiota and activities of digestive and immune-related enzymes of sea cucumber
王琦, 张秀梅, 陈慕雁, 等. Comparison of intestinal microbiota and activities of digestive and immune-related enzymes of sea cucumber
Qi WANG, Xiumei ZHANG, Muyan CHEN, et al. Comparison of intestinal microbiota and activities of digestive and immune-related enzymes of sea cucumber
Sea cucumber
Apostichopus japonicus
stock enhancement by releasing hatchery-produced seeds is a management tool used to recover its population under natural environmental conditions. To assess the suitability of releasing sites
we examined the microbiota of the gut contents of
A. japonicus
from two populations (one in sandy-muddy seagrass beds and one in rocky intertidal reefs) and the microbiota in their surrounding sediments. The activities of digestive and immune-related enzymes in the
A. japonicus
were also examined. The results indicated that higher bacterial richness and Shannon diversity index were observed in all the seagrass-bed samples. There were significant differences in intestinal and sediment microorganisms between the two habitats
with a 2.87 times higher abundance of Firmicutes in the seagrass bed sediments than that in the reefs. Meanwhile
Bacteroidetes and Actinobacteria were significantly higher abundant in the gut content of
A. japonicus
from seagrass bed than those from the reefs. In addition
the seagrass-bed samples exhibited a relatively higher abundance of potential probiotics. Principal coordinates analysis and heatmap showed the bacterial communities were classified into two groups corresponding to the two habitat types. Moreover
compared to
A. japonicus
obtained from rocky intertidal habitat
those obtained from the seagrass bed showed higher lysozyme
superoxide dismutase and protease activities. Our results suggest that bacterial communities present in seagrass beds might enhance the digestive function and immunity of
A. japonicus
. Therefore
compared with the rocky intertidal reef
seagrass bed seems to be more beneficial for the survival of
A. japonicus
.
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