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http://dx.doi.org/10.3796/KSFT.2012.48.3.242

Inter-annual occurrence variation of the large jellyfish Nemopilema nomurai due to the changing marine environment in the East China Sea  

Yoon, Eun-A (Department of Fisheries Science, Chonnam National University)
Cha, Cheol-Pyo (Department of Fisheries Education, Pukyong National University)
Hwang, Doo-Jin (Division of Marine Technology, Chonnam National University)
Yoon, Yang-Ho (Division of Marine Technology, Chonnam National University)
Shin, Hyeong-Ho (Division of Marine Technology, Chonnam National University)
Gwak, Du-Seong (Division of Marine Technology, Chonnam National University)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.48, no.3, 2012 , pp. 242-255 More about this Journal
Abstract
The Nemopilema nomurai a very large jellyfish that has been found in the East China Sea and is now are migrating to Korea and Japan. To investigate the occurrence of N. nomurai based on the changing marine environment of the East China Sea, we conducted field survey in the early summer from 2006-2008. We observed the marine environment using CTD and the occurrence of N. nomurai using FMT and bottom trawling. We caught the most N. nomurai in 2007 and the fewest in 2008 and environment factors influencing its are more sensitive temperature than salinity. Large quantities of N. nomurai with a small bell diameter were caught in 2007 and large individuals with a significant bell diameter were caught in 2008. This appeared which between the catch and bell diameter of N. nomurai had (-) correlation (R=-0.988, p=0.098). Meanwhile, the spatial distribution of N. nomurai concentrations in lower salinity mixed seawater inflow in Changjiang Diluted Water.
Keywords
Jellyfish; Nemopilema nomurai; Marine environment; Catch per unit effort; Bell diameter;
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