There are more captive tigers in the United States than there are wild tigers in the entire world. Many animals under human care engage in problem behaviors such as excessive grooming and aggression, although the origin of these behaviors is typically unknown. Environmental enrichment may mitigate these issues in captive animals of all kinds. In order to individualize enrichment experiences, the current study used a free-operant assessment procedure to establish a menu of most preferred play items and scents among 7 Bengal tigers (Panthera tigris tigris) housed at a sanctuary in southwest Missouri. Each tiger was tested 3 times with scents (cinnamon and Calvin Klein Obsession perfume) and play items (boxes, balls, leaves, and pumpkins). The importance of rigorous assessment of presumed reinforcers among captive wild animals, as well as the difficulty of effectively assessing tigers while ensuring the safety of both the participants and researchers, is discussed.

中文翻译：

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打造老虎节：自由操作评估和环境丰富，以改善圈养孟加拉虎 (Panthera tigris tigris) 的日常生活

美国圈养的老虎比全世界的野生老虎还多。许多人类照料的动物都有问题行为，例如过度梳理毛发和攻击性行为，尽管这些行为的起源通常是未知的。丰富环境可以缓解各种圈养动物的这些问题。为了个性化丰富体验，当前的研究使用自由操作的评估程序在密苏里州西南部一个保护区的 7 只孟加拉虎 (Panthera tigris tigris) 中建立最喜欢的游戏项目和气味的菜单。每只老虎都用气味（肉桂和 Calvin Klein Obsession 香水）和玩具（盒子、球、树叶和南瓜）测试了 3 次。严格评估圈养野生动物中假定的强化物的重要性，