Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (7): 1441-1450.DOI: 10.3969/j.issn.1004-1524.20240840

• Animal Science • Previous Articles     Next Articles

Effects of oyster shells on the growth performance of Penaeus vannamei and water quality, and microbial community characteristics on shell surfaces

HUANG Xianke1,2,3(), HUANG Xiaolin1,2,3,*(), ZHANG Xiang1,2,3, LI Min1,2,3, CAI Yilong1,2,3, CHEN Ran1,2,3   

  1. 1. Zhejiang Mariculture Research Institute, Wenzhou 325005, Zhejiang, China
    2. Zhejiang Key Laboratory of Coastal Biological Germplasm Resources Conservation and Utilization, Wenzhou 325005, Zhejiang, China
    3. Wenzhou Key Laboratory of Marine Biological Genetics and Breeding, Wenzhou 325005, Zhejiang, China
  • Received:2024-10-08 Online:2025-07-25 Published:2025-08-20

Abstract:

In the cultivation of Penaeus vannamei, the addition of oyster shells can improve water quality and enhance shrimp growth. However, the effects of in situ water quality treatment by oyster shells on water quality and shrimp growth, as well as the composition and dynamic succession of microbial communities in oyster shell biofilms, remain inadequately studied. To investigate the effects of adding oyster shells on the growth performance of Penaeus vannamei and aquaculture water quality, this study established a control group and three experimental groups with low (volume fraction 1‰), medium (volume fraction 2‰), and high (volume fraction 4‰) oyster shell additions, comparing their impacts on the growth metrics of Penaeus vannamei and analyzing the distribution characteristics of bacterial communities on the surface of the oyster shells. Results showed that the addition of oyster shells significantly increased the shrimp survival rate (F=9.222, P=0.006), body length (F=13.267, P=0.002), and body weight (F=8.102, P=0.008), the survival rate of the low addition group (90.73%) was significantly lower than that of the medium addition group (97.50%) and the high addition group (99.17%). The addition of oyster shells also increased phosphate content (F=52.509, P<0.001), decreased nitrite content (F=7.323, P=0.011), and increased nitrate content (F=23.615, P <0.001). In the biofilm, the relative abundance of Tenacibaculum significantly decreased as the aquaculture process progressed, while the relative abundance of Nitrospira and Ruegeria significantly increased. The increased relative abundance of Nitrospira in the biofilm accelerated the nitrogen cycle from nitrite to nitrate in the aquaculture system, thereby improving water quality and enhancing shrimp survival rate, body length and body weight. This study provided guidance on the addition of oyster shells in shrimp cultivation and offered a theoretical basis for further exploration of the mechanisms by which oyster shell biofilms improve water quality and promote shrimp health.

Key words: oyster shell, biofilm, Penaeus vannamei, nitrogen cycle, water quality improvement

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