@article{oai:kumadai.repo.nii.ac.jp:00020633,
 author = {島田, 秀昭 and Shimada, Hideaki and 松田, 幸喜 and Matsuda, Koki and 今村, 順茂 and Imamura, Yorishige and 中田, 晴彦 and Nakata, Haruhiko},
 journal = {熊本大学教育学部紀要 自然科学},
 month = {Nov},
 note = {Previously, we 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. Thus, in the present study, to obtain the information about a suitable period for collection of female rock shells inhabiting in Kumamoto harbor, we examined the maturity of their ovary. The maturity of the ovary in female rock shells was observed during periods from beginning of May to the biginning of September. Since a high occurrence of imposex was found in a harbor of Kumamoto coastal waters, it is likely that the contamination of organotin compounds still remains at hazardous levels in the harbor.},
 pages = {47--51},
 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4報) : 教材に適したイボニシの採取時期と場所},
 volume = {56},
 year = {2007},
 yomi = {シマダ, ヒデアキ and マツダ, コウキ and イマムラ, ヨリシゲ and ナカタ, ハルヒコ}
}