The early snail acquires the learning. Comparison of scores for conditioned taste aversion between morning and afternoon

Akiko Wagatsuma, Rio Sugai, K. Chono, Sachiyo Azami, D. Hatakeyama, Hisayo Sadamoto, E. Ito*

*この研究の対応する著者

研究成果: Article査読

37 被引用数 (Scopus)

抄録

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°C 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.

本文言語English
ページ(範囲)149-155
ページ数7
ジャーナルActa biologica Hungarica
55
1-4
DOI
出版ステータスPublished - 2004 7 9
外部発表はい

ASJC Scopus subject areas

  • 生化学、遺伝学、分子生物学(全般)
  • 環境科学(全般)
  • 神経学

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