No evidence for memory retention of a learned association between a cue and roost quality after hibernation in free‐ranging bats,Ethology

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No evidence for memory retention of a learned association between a cue and roost quality after hibernation in free‐ranging bats
Ethology ( IF 1.3 ) Pub Date : 2020-04-20 , DOI: 10.1111/eth.13029
Jesús R. Hernández‐Montero ₁ , Caroline R. Schöner ₁ , Gerald Kerth ₁

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Hibernation is a physiological adaptation that allows animals to survive adverse environmental conditions. A commonly assumed cost of hibernation is impaired memory retention. So far, however, the effects of hibernation on memory retention have been assessed on only a few behavioral tasks, and exclusively under laboratory conditions. Taking advantage of the longevity and strict colony fidelity of female Bechstein's bats, we were able to evaluate memory retention in the same individuals over two consecutive summers in the field. We used a pairwise roost choice experiment with automatic monitoring of RFID‐tagged bats. Roosts’ suitability as day roost was associated with a distinctive external echo‐acoustic cue. Experiments were separated by a natural hibernation period of eight months. We determined associative learning and memory retention by comparing the bats’ proportion of visits to suitable roosts within and between breeding seasons, respectively. During the first breeding season, bats quickly learned to associate the suitable roosts with their external cue. After hibernating, we found no evidence that individuals remembered the association between the roosts’ suitability and their respective external cue, suggesting a lack of memory retention. Nevertheless, bats quickly re‐learned the same association during the second breeding season, emphasizing the high behavioral flexibility of Bechstein's bats.

中文翻译：

在自由放养的蝙蝠冬眠后，没有证据表明记忆与线索和栖息地质量之间的学习联系有关

冬眠是一种生理适应，可使动物在不利的环境条件下生存。通常认为的休眠成本是内存保留能力下降。但是，到目前为止，仅在一些行为任务上并且仅在实验室条件下，评估了休眠对记忆保持的影响。利用雌性Bechstein蝙蝠的寿命长和严格的菌落保真度，我们能够在野外连续两个夏天评估同一个人的记忆力。我们使用了成对栖息地选择实验，并自动监控了带RFID标签的蝙蝠。栖息地作为白天栖息地的适宜性与独特的外部回声提示有关。实验间隔8个月的自然休眠期。我们通过比较蝙蝠在繁殖季节内和繁殖季节之间到合适的栖息地的拜访比例来确定联想学习和记忆保留。在第一个繁殖季节，蝙蝠很快学会了将合适的栖息地与其外部线索联系起来。冬眠后，我们没有发现任何证据表明个体记得起栖息地的适应性与其各自的外部提示之间的联系，这表明缺乏记忆力。尽管如此，蝙蝠很快在第二个繁殖季节重新学习了相同的关联，从而强调了贝希斯坦蝙蝠的高度行为灵活性。冬眠后，我们没有发现任何证据表明人们记得记忆库的适宜性与其各自的外部提示之间的联系，这表明记忆力缺乏。尽管如此，蝙蝠很快在第二个繁殖季节重新学习了相同的关联，从而强调了贝希斯坦蝙蝠的高度行为灵活性。冬眠后，我们没有发现任何证据表明人们记得记忆库的适宜性与其各自的外部提示之间的联系，这表明记忆力缺乏。尽管如此，蝙蝠很快在第二个繁殖季节重新学习了相同的关联，从而强调了贝希斯坦蝙蝠的高度行为灵活性。

更新日期：2020-04-20

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