海中林構成種カジメの年齢と生長について
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概要
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Attempts were made to determine the age and growth of Ecklonia caca KJELLMAN collected along the coast of two different localitie, in the southern part of Izu Peninsula, Japan. Longitudinal and transverse sections were made at the basal part of the stem and used for the examination.In the sections through the stem, the dark zone which consists of small, darkcoloured cells was regarded as the growth ring. The ring was observed as a pair of lines in a longitudinal section or rings in a transverse section. Considering the high percentage occurrence of individuals with newly formed growth rings in January, the growth ring is probably formed duringa slow growth period of autumn and winter months. From one to five year rings were counted among the materials, and the number of the rings increased with stem size represented as SL×SD2. Growth curve of Ecklonia cava for five years after the development of young sporphyte was estimated based on the relative stem size for each age group.
- 公益社団法人 日本水産学会の論文