Investigation of Causes about Coliform Changes in Goseong-Man Bay Oyster Farm
Sul-Gi Lee, Sang-Man Cho and Woo-Geon Jeong
Institute of Marine Industry, Geyongsan National University, Chonchidaeguk-gil 38, Tongyeong 53064, Korea Faculty of Marine applied biosciences, Kunsan National University, Deahak-ro 558, Gunsan 54150, Korea Department of Seafood and Aquaculture Science
In parallel with the increasing consumption of cultured fishery products, securing the food safety for marine products is becoming a social problem. Among them, shellfish can cause food poisoning due to pathogenic microorganisms. The total pollutant loads were estimated as following: 10,004 tons/year in BOD, 2,371 tons/year in T-N, and 714 tons/year in T-P. Tidal current speed did not exceed 10cm per second within the survey period, the mean water temperature was 18.96 ± 5.51℃, the mean salinity 31.70 ± 1.34 psu, the mean pH 7.96 ± 0.13, the mean DO 6.50 ± 1.36 mg/L, and the range of mean COD was from 1.30 ± 0.63 to 2.77 ± 1.13 mg/L. Total coliform at <1.8-14 MPN/100mL, and fecal coliform at <1.8-7.8 MPN/100 mL was founded in the microbiological test. Physicochemical factors did not affect the variation of total coliform and fecal coliform. It is also needed to prohibit eating raw oysters when in excess of standards, to designate Goseong-man bay as an specialized area for oyster farming in order to shift floating fish cage and manage marine manufactures, or minimize pollution in development of Nampo port for oyster farming.
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