The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Survival and Growth of the Purplish Washington Clam, Saxidomus purpuratus Spat Sowed in bottom and intermediate culture

개조개, Saxidomus purpuratus의 중간육성 및 씨뿌림된 치패의 성장과 생존

  • Jin, Young-Guk (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Oh, Bong-Se (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Jung, Choon-Koo (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Kim, Tae-Ik (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Park, Min-Woo (Southwest Sea Fisheries Research Institute, NFRDI)
  • 진영국 (국립수산과학원 남서해수산연구소) ;
  • 오봉세 (국립수산과학원 남서해수산연구소) ;
  • 정춘구 (국립수산과학원 남서해수산연구소) ;
  • 김태익 (국립수산과학원 남서해수산연구소) ;
  • 박민우 (국립수산과학원 남서해수산연구소)
  • Received : 2011.08.26
  • Accepted : 2011.09.28
  • Published : 2011.09.30
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Abstract

We studied possibility of the sowing culture at the bottom after intermediate culture as a method for raising the survival of the Purplish Washington clam, Saxidomus purpuratus. The pearl net ($35cm(W){\times}35cm(B){\times}20cm(H)$) for S. prupuratus spat during the period of intermediate culture (hanging culture) from April to October in 2010. The pearl net (100 inds./net) was installed at two stations (Namhae and Pohang) being about 3-4 m in water depth. After hanging culture, S. prupuratus spat sowed in the bottom of the Gangjin Bay. The survivals (%) of intermediate culture of this species at Namhae station and Pohang station were 73% and 74%, respectively. Daily growth rate of mean shell length and mean weight in Namhae station were higher than those in Pohang station. After sowing at the bottom of the Gangjin Bay, its survival (%) showed 73.98% in January 2011. These results suggested the possibility of the intermediate culture as hanging culture for raising survival rate of S. prupuratus.

급감하는 개조개의 자원량을 회복하기 위한 방안으로 치패를 중간육성 후 씨뿌림하는 방식이 생존과 성장에 어떠한 영향을 미치는지 관찰하였다. 개조개 평균 각장 15.81 mm (평균 전중 0.90 g) 의 치패를 4월에 채롱에 수하하여 10월까지 중간육성한 결과 각장 22.9 mm 내외 (전중 3.88 g 내외) 로 성장하였고 생존율은 73% 이상으로 자연에 초기 치패를 씨뿌림하였을 때 보다 생존율이 높은 것으로 나타났다. 이를 다음해 1월까지 다시 씨뿌림한 결과 각장 27.6 mm (전중 6.6 g) 으로 성장하였고 생존율은 약 74%를 나타내었다. 이는 중간육성 후 씨뿌림 방식이 종묘 방류 후 나타나는 대량폐사의 문제점을 해결할 수 있는 하나의 대안으로 충분히 가능성이 있다는 사실을 보여준다.

Keywords

References

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