Selection of Optimum Species of Tetraselmis for Mass Culture

대량배양에 적합한 Tetraselmis종의 선택

  • Published : 1998.05.01

Abstract

Tetraselmis is widely used as a live food because of its easy handling, high nutrient, large size and wide tolerant range of temperature and salinity. In order to find the optimum Tetraselmis species for mass culture in Korea, five species of this microalgae were examined on size, optimum culture condition ${\textperthousand}$s, $^{\circ}C.$) and nutrient composition. The results obtained were as follows: Among five species of Tetraselmis, T. sp.(Haeundae) was the largest(major axis $17.6{\pm}1.87^{\mu}$m, mean cell volume 727${\mu}$m), and T. sp. (China) the smallest (major axis $14.6{\pm}1.46^{\mu}$m, mean cell volume 625m). Tetraselmis was very eurythermal and euryhaline species. But optimum temperature and salinity for growth were 24~$30^{\circ}C.$ and 27~30${\textperthousand}$, respectively. Among five species of Tetraselmis, T. sp. (China) seemed to be the most tolerant of high temperature over $30^{\circ}C.$, and T. tetrathele of low temperature below $6^{\circ}C.$. In culture density, T. suecica showed the highest growth rate among the among the five species. The cell density of this microalgae attained to $141{\times}10^4$cells/ml at $24^{\circ}C.$ and 30${\textperthousand}$ within 7 days. In chemical composition, crude protein amount was the highest in T. suecica (44.50%), and crude lipid amount it T. sp. (Haeundae, 7.13%). Total essential amino acid amount was the highest in T. sp. (Haeundae, 50.4%) and total polyunsaturated amount in T. sp. (China, 11.7%) The results on growth and chemical composition of five species of Tetraselmis indicated that T. suecica seemed to be the most suitable species for mass culture in Korea.

온도와 염분에 대하여 내성이 강하고 대량배양이 쉬워서 조개류의 인공종묘생산시 먹이로서 많이 사용하고 있는 5종의 Tetraselmis (T. tetrathele, T. suecica, T. subcordiformis, T. sp. (Haeundae), T. sp (China)) 중 우리나라 기후 환경에 대향배양이 가장 적합한 종을 선택하기 위핵서 최적 배양환경 (온도, 염분)을 조사하고 이때의 세포크기와 영양성분을 조사하였다. 5종의 Tetraselmis의 세포크기 및 체적은 T. sp. (Haeundea)가 장경 $17.6{\pm}1.87$${\mu}$m, 체적 727${\mu}$$m^3$로 가장 대형종이었으며 중국산 T. sp.가 장경14.6+- 1.46${\mu}$m, 체적 625${\mu}$$m^3$으로 가장 소형종이였다. Tetraselmis는 광염성, 광온성이나 최적성장을 위한 수온과 염분 구간은 각각 24~$30^{\circ}C.$와 27~30%.였다. 5종의 Tetraselmis에서 고수온에 대한 내성은 중국산 Tetraselmis, 저수온데 대한 내성은 T. tetrathele가 높은 것으로 나타났다. 5종의 Tetraselmis중 배양밀도가 가장 높았던 종은 T. suecica였으며, 이 종은 배양 7일째 $24^{\circ}C.$, 30%.에서 세포수가 $141{\times}10^4$cells/ml (s.g.r., 0.3906)로 성장이 가장 좋았다. 5종의 Tetraselmis의 화학성분중 조단백질 함량은 T. suecica가 44.50%로 가장 높게 나타났고 조지방은 해운대산 T. sp.가 7.13%로 높게 나타났다. 필수아미노산은 해운대산 .T.sp.에서 50.40%로 가장 높게 나타났고, 불포화지방산은 중국산 T.sp.에서 11.7%로 가장 높게 나타났다. 5종의 Tetraselmis의 성장과 영양성분 결과로 보아 우리나라에서 대량배양이 가장 적합한 종은 T. seucica임을 알수 있었다.

Keywords

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