Growth and maturation of six species of Sargassum and Cystoseira (Phaeophyta, Fucales) in Oshoro Bay, Hokkaido, Japan.

The article presents information on the growth and maturation of six species of Sargassum and Cystoseira in Oshoro Bay, Hokkaido, Japan, for the period of 1980-1981. The algae attained their maximum development in July and August of the period 1980-1981. After maturation, old thalli decayed away from the upper part, while new branches grew from the remaining basal portion in the perennial species.