한국양식학회지 (Journal of Aquaculture)

한국양식학회 (The Korean Society of Fisheries and Aquatic Science)
권호 표지

Rotifer Brachionus rotundiformis의 개체군 성장과 소화효소 활성의 관계

Relationship between Population Growth and Digestive Enzyme Activity of Rotifer Brachionus rotundiformis

  • 권오남 (북해도대학 대학원수산과학연구원) ;
  • 박흠기 (강릉대학교 해양생명공학부)
  • Kwon, O-Nam (Division of Marine Biosciences, Graduate School of Fisheries Science, Hokkaido University) ;
  • Park, Heum-Gi (Faculty of Marine Bioscience and Technology, Kangnung National University)
  • 발행 : 2008.02.25
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초록

본 연구의 목적은 rotifer Brachionus rotundiformis의 영양강화와 자어의 소화기능을 높이기 위해 소화효소 활성이 높은 rotifer의 선택방법을 제시하는 것이다. 소화효소 활성을 측정하는 개체군은 성장과정에 있는 개체군들 중 임의로 표본 수집하여 소화효소활성을 측정하여 결정하였다. 선택된 개체군에서 개체밀도와 성장률의 관계가 RD=5865 SGR-350.08(P<0.001)로 나타났다. 포란률은 성장률과 개체밀도와의 관계가 각각 F=-36.147 SGR+61.652(P<0.05)와 F=-0.0085 RD+66.38(P<0.001)로 나타났다. 성장률과 소화효소 활성의 rotifer 개체당 활성은 Amyl=-1.6482 SGR+3.2498(P<0.05), TAP=-0.8115 SGR+1.1361(P<0.001) 및 TGL+0.0055 SGR+0.0079(P=0.239)로 나타나 TG-lipase 활성에서는 성장률과 관계없는 것으로 나타났다. 또한 포란률과 rotifer 개체당 소화효소 활성의 관계는 Amyl=0.0296 F+1.0981(P<0.001). TAP=0.0252 F+0.0975(P<0.001) 및 TGL=-6E-06 F+0.0113(P=0.915)으로 나타나 TG-lipase 활성이 포란률과 관계없는 것으로 나타났다. 반면 TG-lipase의 단백질 비활성과 포란률, 성장률 및 개체밀도와의 관계는 각각 TGL=-0.0024 F0.2332(P=0.132), TGL=0.1267 SGR+0.005(P<0.01) 및 TGL=0.0002 F-0.0594(P<0.001)로 나타나 TG-lipase 단백질 비활성은 포란률과의 관계를 제외하고 각각 상관된 변화를 보였다. 따라서 rotifer의 영양강화효과와 자어에게 외부기인 소화효소 전달을 위한 높은 소화효소 활성을 보이는 rotifer 개체군이 개체밀도가 높은 개체군보다는 포란률이 높은 경우에 나타났기 때문에 포란률이 높은 개체군을 선택하여 영양강화하고 자어에 공급하는 것이 보다 자어에 유익할 것으로 판단된다.

The purpose of this study was to suggest that selecting method of rotifer with high activity of digestive enzymes for the enrichment effect of rotifer and the increasing of digestive enzymes of fish larvae. the populations assayed the activities of the digestive enzymes were randomly selected out of several population communities cultured with freshwater condensed Chlorella. The relationship with the population density and the growth rate of selected populations was shown to RD=5865 SGR-350.08(P<0.001). The relationships with fecundity of the growth rate and the population density were shown to F=-36.147 SGR+61.652(P<0.05) and F=-0.0085 RD+66.38(P<0.001), respectively. The relationships of the growth rate and the individual activities of digestive enzymes in rotifer were assayed to Amyl=-1.6482 SGR+3.2498(P<0.05), TAP=-0.8115 SGR+1.1361(P<0.001) and TGL+0.0055 SGR+0.0079(P=0.239), respectively. But in TG-lipase was not related significantly with the growth rate. Also the relationships of the fecundity and the individual activities of digestive enzymes in rotifer were shown to Amyl=0.0296 F+1.0981(P<0.001), TAP=0.0252 F+0.0975(P<0.001) and TGL=-6E-06 F+0.0113(P=0.915), respectively. But in TG-lipase was not related significantly with the fecundity. And the relationships with the specific activity of TG-lipase of the fecundity, the growth rate and the population density were TGL=-0.024 F+0.2332(P=0.132), TGL=0.1267 SGR+0.005(P<0.01) and TGL=0.0002 F-0.0594(P<0.001), respectively. In this case, specific activity of TG-lipase was shown the significant relationship with the population density and the growth rate, but it was not related significantly with fecundity. Therefore, Because a population shown the high activity of digestive enzymes for increasing a lipid enrichment effect of a rotifers and receiving the many exogenous digestive enzymes to fish larvae was the population of high fecundity than the population of high rotifer density, to select the population of a high fecundity was suggested to benefit than a high growth rate for fish larvae.

키워드

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