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HETEROTROPHIC BACTERIAL ABUNDANCE AND DIVERSITY IN THE FARMING ENVIRONMENT AND GUTS OF THE OYSTER CRASSOSTREA HONGKONGENSIS

文献类型： 外文期刊

作者： Wang, Ruixuan 1 ; He, Jian 1 ; Wang, Jiangyong 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Xin Gang West Rd, Guangzhou 510300, Guangdong, Peoples R China

2.Minist Agr, Key Lab South China Sea Fishery Resources Exploit, Key Lab Fishery Ecol & Environm, Guangzhou 510300, Guangdong, Peoples R China

3.Minist Agr, Key Lab Aquat Prod Proc, Guangzhou 510300, Guangdong, Peoples R China

关键词： Crassostrea hongkongensis; heterotrophic bacteria; vibrios; quantity; environmental factors

期刊名称：JOURNAL OF SHELLFISH RESEARCH （ 影响因子：1.396； 五年影响因子：1.47 ）

ISSN： 0730-8000

年卷期： 2016 年 35 卷 2 期

页码：

收录情况： SCI

摘要： Currently, the knowledge of ecology and function of bacteria harbored by molluscs is very limited. In this study, quantity and richness of culturable heterotrophic bacteria (CHB) in seawater of the farming environment and guts of the oyster Crassostrea hongkongensis were determined monthly, with classical, biochemical, and molecular methods. About 800 randomly selected bacterial strains were purified and identified. Quantities of CHB and vibrios, ranging from 2.3x10(3) to 2.2x10(5) CFU/ml and 1.6x10(2) to 3.0x10(3) CFU/ml, respectively, were present in the farming seawater, whereas those in the oyster C. hongkongensis ranged from 5.3x10(4) to 5.4x10(6) CFU/g and 6.0x10(3) to 1.4x10(5) CFU/g, respectively. Vibrio spp., Pseudoalteromonas spp., Bacillus spp., and Shewanella spp. appeared almost every month. Richness of heterotrophic microbial communities of the seawater and the oysters was very similar and peaked in August. Variation in the diversity (Shannon index) of CHB in the seawater and in the oysters was similar, a significant positive correlation was showed between them (r = 0.894), and their diversities were both peaked in August. Statistical analysis showed that salinity has more important impact on quantity of CHB in seawater. Similarly, temperature had more important impact on that in the oysters. Important threshold data were analyzed to further explain the relationships.

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