The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Estimation of Carrying Capacity by Food Availability for Farming Oysters in Goseong Bay, Korea

먹이가용성에 의한 고성만의 굴 양식장 수용력

  • Lee, Sang-Jun (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Jeong, Woo-Geon (Department of Marine biology and Aquaculture, Gyeongsang National University) ;
  • Cho, Sang-Man (Department of Aquaculture and Aquatic Sciences, Kunsan National University) ;
  • Kwon, Jung No (Marine Environment Research Division, National Institute of Fisheries Science)
  • 이상준 (국립수산과학원 어장환경과) ;
  • 정우건 (경상대학교 해양생명과학과) ;
  • 조상만 (군산대학교 해양생명과학과) ;
  • 권정노 (국립수산과학원 어장환경과)
  • Received : 2016.06.09
  • Accepted : 2016.06.30
  • Published : 2016.06.30
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Abstract

For the continuous stable production of oyster, estimation of food availability (F) was carried out in Goseong Bay, south of coast Korea. Primary productivity ranged from 0.07 to $0.44gC/m^2/day$ (average $0.25gC/m^2/day$), lowest in July and highest in January. The distribution of primary productivity at Goseong Bay showed the pattern of "high in the south and low in the north." Food availability (F) was $F{\leq}0$, indicating insufficient food supply, from August to November and F > 0 from January to April. Continuous insufficient food supply was observed at 18 oyster farms in the southern part of the bay and 4 in its northern part. Mortality at the oyster farms was 56% on the average, and around 58% of death occurred during November when food supply was insufficient. The optimal population of cultured oyster per unit flow area was calculated to be $110-115indiv./m^2$ (198-201 indiv./string). When the sea area was divided into 3 regions (A, B, C) according to carrying capacity, the carrying capacity of (A) regions was $52-53indiv./m^2$ (93-95 indiv./string), (B) regions was $142-144indiv./m^2$ (255-259 indiv./string), and (C) regions was $198-202indiv./m^2$ (356-363 indiv./string). In particular, (A) regions showed extremely low productivity. For continuous stable oyster farming at Goseong Bay, it is necessary to control point and non-point source pollution through continuous environmental monitoring and to adjust harvest according to the base carrying capacity during the season of high water temperature.

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