2004年
The early snail acquires the learning. Comparison of scores for conditioned taste aversion between morning and afternoon
ACTA BIOLOGICA HUNGARICA
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- 巻
- 55
- 号
- 1-4
- 開始ページ
- 149
- 終了ページ
- 155
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1556/ABiol.55.2004.1-4.18
- 出版者・発行元
- AKADEMIAI KIADO
The pond snail Lymnaea stagnalis acquires conditioned taste aversion (CTA) and maintains its memory for more than a month. Snails in our laboratory were cultured at 20 degreesC on a 12: 12 light-dark cycle (light from 7 am to 7 pm). To examine the hours during which snails acquire CTA effectively, we trained some snails in the morning and others in the afternoon, and then compared their scores. CTA developed in both cases, but scores were significantly better in the morning than in the afternoon. To elucidate the cause of this difference in scores, we observed the voluntary activity of snails and found the circadian rhythm reflected in the snails' free-movement distances; distances at the circadian time 0-12 (daytime) were significantly longer than those at the circadian time 12-24 (nighttime). This rhythm was kept up for at least 3 days, even in constant darkness. In conclusion, L. stagnalis should be trained in the morning to acquire associative learning, possibly because of its greater propensity to roam about at that time as opposed to the afternoon.
- リンク情報
- ID情報
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- DOI : 10.1556/ABiol.55.2004.1-4.18
- ISSN : 0236-5383
- Web of Science ID : WOS:000223046100018