Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
권호 표지

Intensive Culture of the Pacific White Shrimp Litopenaeus vannamei under Limited Water Exchange I. Indoor Nursery Culture of Postlarvae

사육수 비교환 방식에 의한 흰다리새우의 고밀도 사육 I. 후기유생(postlarva)의 실내 중간육성

  • Jang, In-Kwon (West Sea Mariculture Research Center, National Fisheries Research & Development Institute) ;
  • Kim, Jong-Sheek (West Sea Mariculture Research Center, National Fisheries Research & Development Institute) ;
  • Cho, Kook-Jin (West Sea Mariculture Research Center, National Fisheries Research & Development Institute) ;
  • Seo, Hyung-Chul (West Sea Mariculture Research Center, National Fisheries Research & Development Institute) ;
  • Cho, Yeong-Rok (West Sea Mariculture Research Center, National Fisheries Research & Development Institute) ;
  • Gopalakannan, Ayyaru (West Sea Mariculture Research Center, National Fisheries Research & Development Institute) ;
  • Kim, Bong-Lae (West Sea Mariculture Research Center, National Fisheries Research & Development Institute)
  • 장인권 (국립수산과학원 서해특성화연구센터) ;
  • 김종식 (국립수산과학원 서해특성화연구센터) ;
  • 조국진 (국립수산과학원 서해특성화연구센터) ;
  • 서형철 (국립수산과학원 서해특성화연구센터) ;
  • 조영록 (국립수산과학원 서해특성화연구센터) ;
  • ;
  • 김봉래 (국립수산과학원 서해특성화연구센터)
  • Published : 2008.11.25
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Abstract

Farming of the fleshy shrimp Fenneropenaeus chinensis which is a major cultured species in the west coast of South Korea, has been suffered :trom mass mortality due to disease epizootics including viruses. Since the Pacific white shrimp Litopenaeus vannamei was introduced to Korea in 2003, farming of this species has rapidly increased for years, occupying 62.5% of total cultured shrimp production in 2007. However the studies on L. vannamei culture methods for shrimp farming situations in Korea are very limited. Nursery culture of shrimp larvae has some advantages including increased survival, improved feed efficiencies, enhanced growth performance and reduced grow-out period. In this study, L. vannamei postlarvae (${PL_3}-{PL_{10}}$) with a density of $3,750-9,090/m^3$ were cultured in four raceways under limited water exchange condition for 35 days. Survival was the highest (93.6%) in tank stocked with $4,090/m^3$ and was the lowest in tank with $9,090/m^3$ (58.1 %). Mean body weight at harvest ranged from 0.071 to 0.108 g, and FCR was 0.59-0.70 in all tanks. Concentration of total ammonia nitrogen was increased up to 20 ppm on day 10 in all tanks and thereafter gradually decreased by the third week of culture. Nitrite-nitrogen was rapidly increased from the third week, representing bio-floc condition by developed nitrifying bacterial community. Of the present nursery system some modification of structure and consideration for commercial scale are needed in order to be implemented to shrimp farmers.

서해안의 주요 양식종인 대하는 최근 바이러스를 포함한 질병으로 인하여 생산성이 크게 저하되고 있다. 이에 대한 대책으로 2003년 이식된 흰다리새우는 급속도로 양식이 확산되어 2007년 전국새우양식 생산량의 62.5%를 점유하였으나 흰다리새우의 특성에 맞는 양식기술은 거의 연구되지 않았다. 새우유생의 중간육성은 생존율과 사료효율의 향상, 생산량 증대, 바이러스성 질병피해 감소 뿐 아니라 양성기간의 단축 등의 장점이 있다. 본 연구에서는 사육수 비교환 방식으로 시설된 4개의 raceway 수조에 흰다리새우 postlarva (${PL_3}-{PL_{10}}$)를 $3,750-9,090/m^3$의 밀도로 입식하고 중간육성을 실시하였다. 35일의 사육 결과, 생존율은 $4,090/m^3$ 밀도의 수조에서 93.6%로 가장 높았으며, $9,090/m^3$의 tank에서 58.1로 가장 낮았다. 수확시 평균 체중은 0.071-0.108 g이었으며 FCR은 0.59-0.70으로 매우 낮았다. TAN농도는 사육 10일째 전 tank에서 20 ppm까지 상승한 이후 점차 감소하여 3주째부터 크게 낮아졌으며 아질산염 농도는 3주째부터 급격하게 상승하여 타가영양상태로의 전환이 관찰되었다. 본 연구 결과는 일부 시스템의 보완과 규모의 확대를 통하여 양식현장에서 직접 응용 가능할 것으로 기대된다.

Keywords

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