2006 Volume 18 Issue 1 Pages 3-8
The approach to large-scale fishery seed production has been accelerated along with positive promotion of aquaculture. The technology for mass and stable production of the initial feed organisms using the mass culture tank is necessary for the large scale production of the fishery seedlings. The clarification of the light penetration in the culture tank attenuation with the increase of the cultured microalgal density and the light irradiation distance make setting and controlling optical radiant environment be a concern of the photosynthetic activity of microalgae in general. Measurement and analysis of the attenuation of optical penetration in the culture tank were conducted with the increase of the microalgal density and the light irradiation distance. As a result, it was found that the reduction of optical radiation is proximate to the law of Lambert-Beer within the range of 5 × 105 ∼ 1 × 107 cells ml-1 of practicable density, and 14 ∼ 24 cm of liquid thickness. The practical mass culture tank could be designed by the simulation of optical environment according to the law.
