ゼブラフィッシュの放射状迷路遂行における順向性干渉

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  • Proactive interference on the radial arm maze performance of zebrafish
  • ゼブラフィッシュ ノ ホウシャジョウ メイロ スイコウ ニ オケル ジュンコウセイ カンショウ

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Ten zebrafish (Danio rerio) were tested in an aquatic version of the eight-arm radial maze by means of a forced- and free-choice procedure, which could not be solved using a stereotypic response pattern. After training once a day for 60 days, the fish achieved a correct-choice ratio of about 60%, significantly higher than the chance level (41.38%). Following the acquisition training, the fish received two trials a day to test effects of the length of inter-trial intervals on this maze performance. The choice accuracy for the second trials was significantly lower when the inter-trial intervals were 3 min than when they were 60 min. These results suggest that zebrafish can learn a radial-arm maze task to some extent, and that increasing the length of inter-trial intervals alleviates proactive interference on the maze performance.

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