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Effects of Bio-floc System on Growth and Environmental Improvement in the Chinese White Shrimp Fenneropenaeus chinensis

바이오플락(Bio-floc) 시스템이 사육 환경개선 및 대하(Fenneropenaeus chinensis)의 성장에 미치는 영향

Kim, Min-Su;Min, EunYoung;Koo, Ja-Keun;Kang, Ju-Chan
김민수;민은영;구자근;강주찬

  • Received : 2015.03.24
  • Accepted : 2015.10.06
  • Published : 2015.10.31

Abstract

The objective of this study was to investigate the effects of bio-floc system that is composed of effective microorganisms (EM) on the microbial composition and water qualities in rearing water and the growth of Chinese white shrimp, Fenneropenaeus chinensis. To investigate the microbial composition according to the bio-floc levels, the study was conducted at 100 and 150% of bio-floc after 5 and 10 days in bio-floc system. The results showed that total bacteria count (TBC) and the counts of Latobacillus sp., Bacillus sp. and Rhodobactor sp., were significantly decreased after 5 days in bio-floc system. To assess the growth of F. chinensis according to the concentrations of bio-floc, the study was conducted at the bio-floc concentrations; 0 (control), 60, 80, 100, 120 and 140% of the prepared bio-floc for 90 days. The growth factors such as daily length and weight gain were considerably increased at the concentrations of bio-floc 100, 120, and 140% after 90 days. As water quality indicators, the values of total-N, NH4+-N and PO4--P were analyzed, and they were significantly decreased at 120 and 140% of bio-floc, compared to the control. The results demonstrated that combination of EM showed the synergic effect on removing N and P.

Keywords

Chinese white shrimp;EM;Bio-floc system;Growth rate

Acknowledgement

Grant : 바이오플락 시스템을 이용한 축제식 무병새우생산 및 표준공정 개발연구

Supported by : 부경대학교산학협력단