題目：
Food hiding and enrichment in captive Asian elephants
豢養亞洲象的食物隱藏和多樣性

摘要
Asian elephants (Elephas maximus) kept in zoos usually spend less time foraging than their wild conspecifics. In order to increase foraging in a group of captive Asian elephants, peanuts were hidden above a distinctive outdoor enclosure structure, the stone border. It was expected that the elephants would learn this association and increase food searching in the outdoor enclosure. After training, the elephants searched more above the stone borders than during baseline, which indicates that they learned the relationship between stone borders and peanuts. But hiding food did not enhance searching behaviour. Therefore, this method of food hiding did not represent an environmental enrichment.

動物園豢養的亞洲象(Elephas maximus)相較於野生種，通常花費較少的時間覓食。為能夠增加成群豢養亞洲象的覓食機會，則將花生藏在各別的室外地區的石頭縫中。預期象群可學會此類的相關性，而在室外地區覓食。在訓練後，象群覓食的地點，在石縫則高於地面上，即表示象群已學會石縫和花生藏處的相關性。但隱藏的食物不會因此增強覓食的行為。所以，此類的隱藏食物方法，未必表示環境提供食物的多樣性。