Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
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Effect of antibiotics treatment for edwardsiellosis of olive flounder Paralichthys olivaceus in biofloc environment

바이오플락 환경에서 넙치(Paralichthys olivaceus)의 에드워드병에 대한 항생제 치료 효과

  • Park, Jung Jun (Aquaculture Management Division, National Institute of Fisheries Science) ;
  • Kim, Seokryel (Dept. of Smart Fisheries Resources, Kongju National University)
  • 박정준 (국립수산과학원 양식연구과) ;
  • 김석렬 (공주대학교 스마트수산자원학과)
  • Received : 2021.11.03
  • Accepted : 2021.11.25
  • Published : 2021.12.31
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Abstract

In biofloc culture for olive flounder, Paralichthys olivaceus, the possibility of antibiotics treatment was investigated against edwardsiellosis. After inducing edwardsiellosis by immersion in Edwardsiella tarda 1.2 × 105/mL suspension, the survival trends on various biofloc water management and some physiological changes were observed. For biofloc water management, six types of water treatments were carried out, which were no exchange without antibiotics as negative control, the exchange to stored biofloc water, the exchange to stored biofloc water with 20% flow-through, the exchange to fresh biofloc water, half fresh biofloc water and half sea water, and the complete flow-through. There was no significant physicochemical change on water qualities in any type. The exchange to fresh biofloc water was shown the highest survival ratio as 72.3%, and in case of stored biofloc water with 20% flow-through, the survival ratio was also significantly high as 62%. Plasma glucose, cholesterol, total protein, calcium, and magnesium were analyzed as physiological index. Mostly, there was no significant change, but plasma cholesterol showed an initial decrease in low survival group, and an initial increase with high survival group. Consequently, antibiotic treatment against a bacterial disease during biofloc culture is possible as long as the biofloc water management follow along properly.

Keywords

Acknowledgement

본 연구는 2021년 국립수산과학원 수산과학연구사업(R2021003)의 지원으로 수행된 수행되었습니다. 본 연구과정 중 사육 및 실험 절차는 국립수산과학원의 동물실험윤리위원회의 규정에 의거하여 수행하였습니다.

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