著者
原村 隆司 田畑 諒一 宝田 一輝
出版者
一般社団法人 日本生物教育学会
雑誌
生物教育 (ISSN:0287119X)
巻号頁・発行日
vol.51, no.3, pp.25-31, 2011 (Released:2019-09-28)
参考文献数
29

For an elementary school children, observation of animal behavior would be important to understand life history of animals. In the present study, we developed teaching materials for the understanding of respiration, especially differences between branchial and pulmonary respirations. Tadpoles of the American bull frog (Rana catesbeiana) generally take dissolved oxygen from water by branchial respiration and through skin. However, if dissolved oxygen in water is low, they sometimes perform air breathing with pulmonary respiration. To understand the change from branchial respiration to pulmonary respiration in tadpoles, we manipulated conditions (abiotic conditions [water pressure, oxygen concentration, and carbon dioxide concentration], biotic conditions [quantity of motion, population density, and developmental stage]) of tank where tadpoles were introduced, and counted the number of air breathing. We also compared the number of air breathing among different developmental stages of tadpoles, because it is supposed that tadpoles during metamorphosis would increase the dependency on pulmonary respiration. The number of air breathing behavior of tadpoles clearly increased when the dissolved carbon dioxide was increased. This indicates that when dissolved oxygen in water is low, brachial respiration is not useful and tadpoles use pulmonary respiration to take the oxygen from air. As the developmental stage prodeeded, the number of air breathing behavior increased. This would reflect physiological transitions during the metamorphosis in which lungs are developing and gills are disappearing. Air breathing behavior of tadpoles is easily observed. By making this experiment with tadpoles, elementary school children would understand the respiration of animals. We emphasized that observation and experiment of animal behavior would be important as teaching materials at elementary school.

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オタマジャクシはエラ呼吸をしていて肺呼吸はしていない&肺がない…という間違いが普及してしまっている(たぶん中2理科の”動物の分類”が原因)。なので、「種にもよりますが、オタマジャクシの頃から肺もあり肺呼吸していますよ。」という話を授業でしている。 関連論文 https://t.co/1Yas2yWVYN
幼稚園からもらって来たおたまじゃくし、最近水面でぱくぱくしていることが多いので調べたら、補助的に肺呼吸していて色んな環境要因で呼吸回数が変化することもあるっていう研究論文出てきた おもしろい https://t.co/desimlrsmv

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