Polyp Removal of a Bloom Forming Jellyfish, Aurelia coerulea, in Korean Waters and Its Value Evaluation
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.
KeywordsAurelia coerulea polyp medusa removal cost
Unable to display preview. Download preview PDF.
- Choi K, Kim SW, Kim DS, Heo W, Lee Y, Hwang IS, Lee HJ (2008) Eutrophication in the upper regions of brackish lake Shihwa with a limited water exchange. Korean J Limnol 41(2):216–227 (in Korean)Google Scholar
- Kim K, Kahng S, Lee H, Lee K, Han M (2012) The story of Lake Shihwa. Ministry of Land, Transport and Maritime Affairs, 24 pGoogle Scholar
- KIMST (2015) Management of marine organisms causing ecological disturbance and harmful effects. Chap. 4. Jellyfish. Korea Institute of Marine Science and Technology Promotion, 78 p (in Korean)Google Scholar
- KOEM (2015) Marine habitat function improvement and restoration: 2015’s jellyfish polyp removal and monitoring. Korea Marine Environment Management Corporation, 83 p (in Korean)Google Scholar
- MLTM (2009) Planning research on preventing damages from the jellyfish. Ministry of Land, Transport and Maritime Affairs, 225 p (in Korean)Google Scholar
- NIFS (2008) Mass occurrence of jellyfish and its prevention and utilization. National Institute of Fisheries Science, 183 p (in Korean)Google Scholar
- NIFS (2009) Hypoxia in the coast of Korea. National Institute of Fisheries Science, GMK Communication, Busan, 173 p (in Korean)Google Scholar
- NIFS (2013) Jellyfish studies in Korea. National Institute of Fisheries Science, 186 p (in Korean)Google Scholar
- Scorrano S, Aglieri G, Boero F, Dawson MN, Piraino S (2016) Unmasking Aurelia species in the Mediterranean Sea: an integrative morphometric and molecular approach. Zool J Linn Soc-Lond 180(2):243–267Google Scholar
- Shin JK, Kim DS, Cho KJ (2000) Dynamics of inorganic nutrients and phytoplankton in Shihwa Reservoir. Korean J Limnol 33(2):109–118Google Scholar
- Yoo YD, Jeong HJ, Kim JS, Kim TH, Kim JH, Seong KA, Lee SH, Kang NS, Park JW, Park J, Yoon EY, Yih WH (2013) Red tides in Masan Bay, Korea in 2004–2005: II. Daily variations in the abundance of heterotrophic protists and their grazing impact on red-tide organisms. Harmful Algae 30:S89–S101CrossRefGoogle Scholar