附着硅藻に関する研究 : 第1報 アサクサノリ附着硅藻の消長と水位に就いて

抄録

The epiphytic diatoms on the cultured laver were observed in two laver-fields, Kakijima, Korea in 1942 and Tokushima, Tokushima Pref. in 1953. The results are as follows : Diatoms begin to occur just before becoming the lowest water-temperature and develop in abundance during the culture period of laver. So that diatoms almost don't occur on the young frond of laver. The rain seems to accelerate the reproduction of the diatoms. The thriving of diatoms in abundarce are seen in the lower levels of the tidal zone than in the upper ones. In order to protect from diatoms, therefore, the twigs for laver-culture must be hung up to 4 hours exposed(in the spring tide)level at the period of the lowest temperature of water.