Dietary Value of Benthic Diatoms for Newly Settled Abalone, Haliotis discus hannai Ino

참전복 치패에 대한 부착성 규조류의 먹이효율

  • 한형균 (국립수산진흥원 거제수산종묘시험장) ;
  • 허성범 (부경대학교 양식학과)
  • Published : 2000.06.01

Abstract

Growth trends of 10 selected species of benthic diatoms, considered essential dietary requirement of the newly settled abalone were monitored. Navicula sp. (B-38), N. incerta and Caloneis schroderi, grew faster than the other tested diatoms. 16 and 32 % abalones fed on Raphoneis sp. and Phaeodactylum settled, respectively; less abalones souled, when fed on Navicula sp., Hantzxchia marina or Nitzschia sp. In the first experiment, survival of the settled abalone was the highest (63 %) and lowest (31 %) for those fed on Rhaphoneis sp. and Navicular sp. respectively. However, in the second and third series of esperiments, abalones fed on Rhaphoneis sp. and Navicula sp. showed the highest (67, 49 %) and lowest (35, 18 %) survival. C. schroderi proved to be the best diet, as the shell length of those fed on the diatoms was 83 ${\mu}$m, as against about 36 ${\mu}$m of those abalones, receiving H. marina or Nitzschia sp., diatoms of the lowest dietary value.

10종의 부착성 규조류를 대상으로 참전복 치패의 먹이효율을 조사하였다. 유생의 부착율을 실험 1에서 Rhaphoneis sp.가 31.6%, 실험 2에서는 P. tricornutum가 16.4%로 가장 높았다. 부착성 규조류를 먹이로 한 치패의 생존율은 실험1에서 Raphoneis sp.가 62.7%로 가장 높았고, N. incerta, C. schroderi, N. closterium 는 각각 56.8%, 55.2%, 54.3%로 비교적 높았으며, Navicula sp. (B-38)는 30.5%로 가장 낮았다. 그리고 실험 2와 3에서는 C. schroderi, N. incerta, P. tricornutum 및 Raphoneis sp.는 높은 생존율을 보였으며, 특히 C. schroderi는 67.6%, 49.4%로 가장 높았다. 반면, H. marina (40.4%, 15.7%), Nitzschia sp. (39.1%, 27.1%), N. closterium (35.2%, 18.0%)은 비교적 낮았다. 치패의 성장에 있어서 일간성장량은 부착율과 생존율이 높았던 C. schroderi에서 최고 83.3 ${\mu}$m로 가장 높았고, 생존율이 낮았던 H. marina와 N. closterium은 19.9~38.7 ${\mu}$m로 가장 낮은 일간성장량을 보였다.

Keywords

References

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