Abstract
Environmental evaluation to biological and ecological aspects of marine organism is an indispenable step for preserving coastal nature. To develop a new environmental evaluation method, release-recaptured test using marked shortneck clam was conducted at tidal flats in Hiroshima prefecture. The test results clarified ecological characteristics of the clam, in which could not be detected distinctly by analyses of water quality and hydraulic factors. Marked clam release-recaptured test was considered as a efficient method for environmental evaluation.
