사육수 비교환 방식에 의한 흰다리새우의 고밀도 사육 II. 흰다리새우의 실내 중간양성 (Intensive Culture of the Pacific White Shrimp Litopenaeus vannamei, under Limited Water Exchange II. Indoor Post-Nursery Culture of Juvenile Shrimp)

서지정보

· 발행기관 : 한국양식학회
· 수록지 정보 : 한국양식학회지 / 22권 / 1호 / 42 ~ 50페이지
· 저자명 : 장인권, 김종식, 서형철, 조국진

초록

Shrimp farming which is entirely conducted in outdoor ponds in the west coast of Korea has been suffered from
mass mortality due to viral epizootics. Intensive indoor shrimp culture under limited water exchange can solve
these problems of outdoor ponds including viral transmission from environment, pollution due to discharge of rearing
water, low productivity and limited culture period. In this study, juvenile L. vannamei (B.W. 0.08-0.09 g) was
stocked with 3,000-5,455/m3 in density in four raceway tanks (two 12.9 m2, two 18 m2 tanks) and cultured for 42
days with 2.7-3.4% of daily water exchange. Results from four tanks showed FCR of 0.79-1.29, survival of 38.2-
48.0%, and yields of 2.49-4.22 kg/m3 which is consistent with 12-20 and 8-14 times higher than those of commercial
shrimp hatchery and outdoor pond in Korea, respectively. Concentrations of total ammonia nitrogen in all
four tanks were 1.11-1.42 ppm in mean level and did not exceed 6.0 ppm (0.096 ppm of NH3) which is still acceptable
levels for shrimp growth. During the culture trial, concentration of NO2-N rapidly increased from stocking,
resulting in mean concentration of 18.45-22.07 ppm. It also exceeded 10 ppm over four weeks and maintained at
35-45 ppm for four days in all tanks, accounting for low survival of shrimp due to long-term exposure to high concentration
of NO2-N. Nevertheless, the results with survival rate over 38% from raceways which experienced the
extreme NO2-N levels suggests that under “biofloc system” white shrimp can acclimate to high NO2-N concentration
to some degree.

영어초록

Shrimp farming which is entirely conducted in outdoor ponds in the west coast of Korea has been suffered from
mass mortality due to viral epizootics. Intensive indoor shrimp culture under limited water exchange can solve
these problems of outdoor ponds including viral transmission from environment, pollution due to discharge of rearing
water, low productivity and limited culture period. In this study, juvenile L. vannamei (B.W. 0.08-0.09 g) was
stocked with 3,000-5,455/m3 in density in four raceway tanks (two 12.9 m2, two 18 m2 tanks) and cultured for 42
days with 2.7-3.4% of daily water exchange. Results from four tanks showed FCR of 0.79-1.29, survival of 38.2-
48.0%, and yields of 2.49-4.22 kg/m3 which is consistent with 12-20 and 8-14 times higher than those of commercial
shrimp hatchery and outdoor pond in Korea, respectively. Concentrations of total ammonia nitrogen in all
four tanks were 1.11-1.42 ppm in mean level and did not exceed 6.0 ppm (0.096 ppm of NH3) which is still acceptable
levels for shrimp growth. During the culture trial, concentration of NO2-N rapidly increased from stocking,
resulting in mean concentration of 18.45-22.07 ppm. It also exceeded 10 ppm over four weeks and maintained at
35-45 ppm for four days in all tanks, accounting for low survival of shrimp due to long-term exposure to high concentration
of NO2-N. Nevertheless, the results with survival rate over 38% from raceways which experienced the
extreme NO2-N levels suggests that under “biofloc system” white shrimp can acclimate to high NO2-N concentration
to some degree.

참고자료

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