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Environmentally Friendly Phytal Animal Removal for Re-use of Holdfasts of Sargassum fusiforme (Harvey) Setchell: pH and Salinity

갈조류 톳의 포복지 재활용을 위한 친환경적 해적생물 구제: pH와 염분

  • 황은경 (국립수산과학원 해조류바이오연구센터) ;
  • 유호창 (국립수산과학원 해조류바이오연구센터) ;
  • 김세미 (국립수산과학원 해조류바이오연구센터) ;
  • 유현일 (국립수산과학원 해조류바이오연구센터) ;
  • 백재민 (국립수산과학원 해조류바이오연구센터) ;
  • 박찬선 (국립목포대학교 해양수산자원학과)
  • Received : 2014.10.28
  • Accepted : 2014.11.12
  • Published : 2014.12.31

Abstract

The brown seaweed Sargassum fusiforme is an edible and highly valued in Korea. During the summer season, phytal organisms graze heavily on young algal blades and holdfastsof the species and substantially reduce harvestable biomass. Here, in this study, we investigated the effects of pH (range: 2~13) and salinity (range: 0~44 psu) on the removal of two major phytal animals, Caprella scaura and Gammaropsis utinomi, associated with S. fusiforme. We also examined the optimum quantum yield (Fv/Fm) of algae in the same experimental conditions to quantify the tolerance of algae to acid and salinity treatments. It was observed that the phytal animals showed more than 80% mortality at pH lower that pH 4 and the extreams of salinity (0~10 psu and 44 psu) after a 5 min of immersion. However, the quantum yield of S. fusiforme was not significantly different from controls within the pH 3~11 range, and the 0~44 psu salinity range. Precisely, if the pH and salinity conditions outside these ranges were used in comercial Sargassum culture, the removal of the animal species would be higher, but with reduced quantum yield of algae. Taken together, our study results indicated that the pH and salinity treatments could allow multiple harvests from the same holdfast of S. fusiforme.

본 연구에서는 톳 양식에서 pH 및 염분농도의 조절에 의한, 환경친화적인 해적생물 구제 방법을 개발하고자 하였다. 이를 위하여 톳의 내성범위를 구하고, 친환경적인 해적생물 구제법을 확립하고자 하였다. 톳에는 생리적 영향을 미치지 않는 친환경적인 해적동물 구제법으로서, pH 4 이하 조건과 pH 10 이상의 조건, 염분농도 10 psu 이하의 조건 및 44 psu 조건에서 효과가 있는 것으로 나타났다.

Keywords

References

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