カキ種苗生産プラントにおける餌料用微細藻類培養の効率化

概要

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The development of the large-scale aquatic seed production system which is provided with a large amount of natural microalgae as the initial food organisms is indispensable for the advancement of aquaculture. In the present study, a food microalgae culture system was developed and tested for the development of oyster seed production plant. To achieve an effective microalgal photosynthesis, high frequency three-band fluorescent lamps were installed on both sides of the 500 l culture tank. The luminaire has the optical dimmer function, and an average vertical side surface PPFD of 300 μmol m-2 s-1 was obtained on the sides of the culture tank though the luminaire was on 100 % output. A moderate optical radiant environment in the culture tank was secured by using inverter lighting method for the microalgae in culture stage, according to the optical penetration change with the growth of the microalgae population, and it succeeded in power consumption because of a great improvement in shortening the culture period and increasing the culture capacity. A daily output of 2000 l (8 × 106 cells ml-1) microalgae can be produced in this culture system, which is composes of thirty two 500 l culture tanks. Thus an annual production capacity of 12 million oyster seedlings (shell height: 3 mm) can be achieved.
生態工学会の論文
2006-07-30