By contrast, the gonads of sea urchins on the beds of Undaria pinnatifida and Saccharina japonica shift from the recovering stage to the growing stage in May (Agatsuma 1997).
Each FAA content in the gonads of treatment C was similar to that of Mesocenlrotus nudus cultured by feeding of fresh Saccharina japonica cultivated from April to June which were highly comparable with those from urchins in an Eisenia kelp bed in a sensory evaluation (Takagi et al.
(2007) reported that fronds of cultivated Saccharina japonica elongated from December to April and the width and weight of fronds increased after April when maturation began.
In the present study, size, color, and hardness of Mesocentrotus nudus gonads were improved by feeding on fresh Saccharina japonica cultivated from December to May before the fishing season.
for providing Saccharina japonica. We also thank M.
Interactive effects of nutrient availability and temperature on growth and survival of different size classes of Saccharina japonica (Laminariales, Phaeophyceae).