Polyp Removal of a Bloom Forming Jellyfish, Aurelia coerulea, in Korean Waters and Its Value Evaluation

  • Wonduk Yoon
  • Jinho Chae
  • Byoung-Seol Koh
  • Changhoon Han
Article
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Abstract

Aurelia coerulea is a bloom forming jellyfish that first appeared before 1980 in the western and southern Korean seas and which has been blamed for huge economical losses in all fields of marine activities. As a preventive measure to reduce economical losses, polyp removal was undertaken at Lake Shihwa, Lake Saemangeum, and Masan Bay, Korea. In the course of efforts during 2 years to remove polyps, polyps were surveyed, quantified, and removed. In these areas, the initial total polyp abundance was 5.04 × 109 and 46.25% of them were removed; Lake Shihwa the highest rates of removal and Lake Saemangeum the lowest. These efforts to remove polyps prevented the appearance of 1.20 × 109 medusae, corresponding to 78.28 × 106 kg. The cost of polyp removal was evaluated and compared with that of medusae removal. The ratio between the cost of polyp removal and that of medusae removal ranged between 0.78–3.14%, indicating large cost savings for polyp removal undertakings. However, the effect of polyp removal varied from positive to none, and we assumed that the cleared surface for polyp removal, quantity of removed polyp, and existence of polyps’ hotspots in neighboring areas were the causes of the non-effectiveness of polyp removal undertakings.

Keywords

Aurelia coerulea polyp medusa removal cost 

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Copyright information

© Korea Institute of Ocean Science & Technology (KIOST) and the Korean Society of Oceanography (KSO) and Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Wonduk Yoon
    • 1
  • Jinho Chae
    • 2
  • Byoung-Seol Koh
    • 3
  • Changhoon Han
    • 4
  1. 1.Human and Marine Ecosystem Research LaboratoryGunpoKorea
  2. 2.Marine Environmental Research and Information LaboratoryGunpoKorea
  3. 3.Marine Ecosystem Management Team, Korea Marine Environment Management CorporationSeoulKorea
  4. 4.Oceanic Climate and Ecology Research DivisionNational Institute of Fisheries ScienceBusanKorea

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