@article{oai:kumadai.repo.nii.ac.jp:00023451, author = {島田, 秀昭 and Shimada, Hideaki and Uemura, Aya and 今村, 順茂 and Imamura, Yorishige and Nakata, Haruhiko and 島田, 秀昭 and Shimada, Hideaki and 上村, 彩 and 今村, 順茂 and Imamura, Yorishige and 中田, 晴彦}, journal = {熊本大学教育学部紀要 自然科学}, month = {Nov}, note = {application/pdf, 論文(Article), We have previously reported that the practice using rock shells is useful for environmental education. In this practice, the precise distinction of the sex of rock shells is very important. However, our preceding study demonstrated that there are many rock shells that are difficult to determine the sex. The purpose of the present study was to obtain information about a suitable period for collection of female rock shells inhabiting in Kumamoto harbor, by examining the maturity of their ovary. As a result, the maturity of the ovary in female rock shells was observed during periods from beginning of June to the end of August. In addition, since imposex in female rock shells inhabiting in the Kumamoto coastal waters was not found, it is likely that the contamination of organotin compounds is improved.}, pages = {15--18}, title = {熊本県沿岸域の巻貝における環境ホルモンの影響評価 (第3報) : 環境教育の教材として用いるイボニシの採取時期について}, volume = {55}, year = {2006}, yomi = {シマダ, ヒデアキ and イマムラ, ヨリシゲ and シマダ, ヒデアキ and イマムラ, ヨリシゲ} }