モリアオガエル幼生のアンモニアおよび尿素排出について

概要

論文の詳細を見る
The quantity of ammonia and urea excreted anteriorly via the gills and posteriorly via the anus of Rhacophorus tadpoles were measured respectively from the time of hatching to the end of metamorphosis. As is seen in Table 1, the nitrogenous waste substances are mainly excreted in the form of ammonia up to the beginning of metamorphosis, 60-90% of the total ammonia apparently being discharged anteriorly, mainly through the gills. On the other hand, urea is predominantly excreted from the metamorphosing tadpole, a large amount of it being expelled from the posterior region, probably through the mesomephros. Furthermore, it seems likely that a small amount of ammonia and urea is excreted through the skin of the tadpoles, because in addition to the excretion of ammonia in small amounts, a moderate increase in the excretion of urea from anterior regions occurs even after the disappearance of gills.
社団法人日本動物学会の論文
1964-05-15