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      Effects of stocking density on the growth performance, physiological response and intestinal microbiota of juvenile Echiura worms (Urechis unicinctus)

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      https://www.riss.kr/link?id=O112508750

      • 저자
      • 발행기관
      • 학술지명
      • 권호사항
      • 발행연도

        2020년

      • 작성언어

        -

      • Print ISSN

        1355-557X

      • Online ISSN

        1365-2109

      • 등재정보

        SCIE;SCOPUS

      • 자료형태

        학술저널

      • 수록면

        3983-3992   [※수록면이 p5 이하이면, Review, Columns, Editor's Note, Abstract 등일 경우가 있습니다.]

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      다국어 초록 (Multilingual Abstract)

      Aquaculture of the Echiura worm Urechis unicinctus has developed rapidly in recent years. However, the artificial cultivation technology remains to be perfected. In this study, the effects of stocking density on the growth performance, physiological responses and intestinal microbiota of U. unicinctus juveniles were evaluated. Juvenile worms were randomly stocked at densities of 200 U (U. unicinctus/m3), 500 U, 1,000 U and 2,000 U, in aquariums. The results indicated that the contents of triglycerides, glucose, total cholesterol, lactic acid, alkaline phosphatase, acid phosphatase and aspartate transaminase in the coelomic fluid of U. unicinctus juveniles were significantly enhanced with increasing stocking density. The digestive enzyme activities increased with increasing stocking density from 200 U to 1,000 U, before exhibiting a significant decrease in the 2,000 U group. In contrast, the antioxidant capacity of U. unicinctus juveniles was suppressed under high stocking density conditions. In case of the intestinal microbiota of U. unicinctus juveniles, Actinobacteria were more abundant in the 200 U group; SJA15, Gluconobacter and OP81 were higher in the 1,000 U group; Burkholderiales and Limnohabitans were enriched in the 2,000 U group. The highest and lowest survival rates of the U. unicinctus juveniles were recorded in the 500 U and 200 U groups respectively, and high stocking densities negatively affected the individual growth performance. In summary, due to the highest survival rate and appropriate growth performance and physiological responses, 500 U was considered to be the optimal stocking density for the cultivation of U. unicinctus juveniles.
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      Aquaculture of the Echiura worm Urechis unicinctus has developed rapidly in recent years. However, the artificial cultivation technology remains to be perfected. In this study, the effects of stocking density on the growth performance, physiological r...

      Aquaculture of the Echiura worm Urechis unicinctus has developed rapidly in recent years. However, the artificial cultivation technology remains to be perfected. In this study, the effects of stocking density on the growth performance, physiological responses and intestinal microbiota of U. unicinctus juveniles were evaluated. Juvenile worms were randomly stocked at densities of 200 U (U. unicinctus/m3), 500 U, 1,000 U and 2,000 U, in aquariums. The results indicated that the contents of triglycerides, glucose, total cholesterol, lactic acid, alkaline phosphatase, acid phosphatase and aspartate transaminase in the coelomic fluid of U. unicinctus juveniles were significantly enhanced with increasing stocking density. The digestive enzyme activities increased with increasing stocking density from 200 U to 1,000 U, before exhibiting a significant decrease in the 2,000 U group. In contrast, the antioxidant capacity of U. unicinctus juveniles was suppressed under high stocking density conditions. In case of the intestinal microbiota of U. unicinctus juveniles, Actinobacteria were more abundant in the 200 U group; SJA15, Gluconobacter and OP81 were higher in the 1,000 U group; Burkholderiales and Limnohabitans were enriched in the 2,000 U group. The highest and lowest survival rates of the U. unicinctus juveniles were recorded in the 500 U and 200 U groups respectively, and high stocking densities negatively affected the individual growth performance. In summary, due to the highest survival rate and appropriate growth performance and physiological responses, 500 U was considered to be the optimal stocking density for the cultivation of U. unicinctus juveniles.

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