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http://dx.doi.org/10.11626/KJEB.2019.37.4.535

Effect of marine environmental characteristics on a discoloration outbreak of Pyropia yezoensis  

Lee, Sang Yong (Seaweed Research Center, National Institute of Fisheries Science)
Kim, Young Hee (Seaweed Research Center, National Institute of Fisheries Science)
Lee, Jee Eun (Seaweed Research Center, National Institute of Fisheries Science)
Yoo, Hyun Il (Seaweed Research Center, National Institute of Fisheries Science)
Publication Information
Korean Journal of Environmental Biology / v.37, no.4, 2019 , pp. 535-544 More about this Journal
Abstract
To elucidate the cause of Pyropia yezoensis discoloration, the characteristics of an aquaculture environment, as well as the morphology and cell structure of P. yezoensis thallus were examined from 2011 to 2014 in aquaculture farms of the Jeonbuk province. P. yezoensis discoloration did not occur in aquaculture farms at Gaeyado located in the Geum River Estuary but occurred in aquaculture farms of Seonyudo, Munyeodo, Biando, and Docheongri near the Saemangeum embankment in November 2011 and April and November 2014. The injured leaves showed discoloration and intracellular vacuole hypertrophy. During the study period, discoloration occurred at concentrations of dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) below 5μM and 0.4μM, respectively. As a result, Pyropia discoloration was determined by low concentrations of DIN and DIP. DIN deficiency affects the early stage and low DIP concentration affects the end stage of aquaculture.
Keywords
discoloration; Pyropia yezoensis; environmental; characteristics; aquaculture;
Citations & Related Records
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