ADAPTATION PHENOMENA CONCERNING THE WATER CONTENT OF THE BARNACLES

概要

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Water content in various body parts of the barnacle, Tetraclita squamosa japonica, together with temperature conditions of the environment and of animal body, were measured during the period exposed to air at the time of ebb and compared between the individuals living at high and low levels. The amount of extra-visceral water and the water content in the shell were larger in high level individuals than in low level ones ; although the water contents of the soft parts were of the same degree among the individuals of both levels, the rate of decrease during the exposed period was far slower in high level animals. All these facts show higher adaptation of the high level individuals than low level ones to the prevailing environmental conditions-high temperature and strong desiccation. The fact that the temperature inside the body of high level individuals was maintained constant during long exposure time in severe solar radiation, irrespective of remarkable rising of air and the rock surface temperature, must also be noticed.
日本生態学会の論文
1963-02-01