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坚持和同类观察能提高郊狼的解决问题能力。

Persistence and conspecific observations improve problem-solving abilities of coyotes.

机构信息

USDA-National Wildlife Research Center-Predator Research Facility, Millville, Utah, United States of America.

Department of Wildland Resources, Utah State University, Logan, Utah, United States of America.

出版信息

PLoS One. 2019 Jul 10;14(7):e0218778. doi: 10.1371/journal.pone.0218778. eCollection 2019.

Abstract

Social learning has important ecological and evolutionary consequences but the role of certain factors, such as social rank, neophobia (i.e., avoidance of novel stimuli), persistence, and task-reward association, remain less understood. We examined the role of these factors in social learning by captive coyotes (Canis latrans) via three studies. Study 1 involved individual animals and eliminated object neophobia by familiarizing the subjects to the testing apparatus prior to testing. Studies 2 and 3 used mated pairs to assess social rank, and included object neophobia, but differed in that study 3 decoupled the food reward from the testing apparatus (i.e., altered task-reward association). For all three studies, we compared performance between coyotes that received a demonstration from a conspecific to control animals with no demonstration prior to testing. Coyotes displayed social learning during study 1; coyotes with a demonstrator were faster and more successful at solving the puzzle box but did not necessarily use the same modality as that observed to be successful. In study 2, there was no difference in success between treatment groups but this is likely because only one coyote within each pair was successful so successful coyote results were masked by their unsuccessful mate. In study 3, there was no difference in success between treatment groups; only two coyotes, both dominant, hand-reared males with demonstrators were able to perform the task. However, coyotes with a demonstrator were less neophobic, measured as latency to approach the object, and more persistent, measured as time spent working on the apparatus. Social rank was the best predictor of neophobia and persistence and was also retained in the best model for time to eat inside the apparatus, a post-trial measurement of object neophobia. These results suggest coyotes are capable of social learning for novel tasks but social rank, neophobia, and persistence influence their social-learning capabilities. This study contributes to understanding the mechanisms underlying how animals gain information about their environment.

摘要

社会学习具有重要的生态和进化意义,但某些因素的作用,如社会等级、新奇事物恐惧症(即避免新刺激)、坚持度和任务-奖励关联,仍不太清楚。我们通过三项研究来检验这些因素在圈养土狼(Canis latrans)的社会学习中的作用。研究 1 涉及单个动物,并通过在测试前让动物熟悉测试设备来消除物体新奇恐惧症。研究 2 和 3 使用交配对来评估社会等级,并包括物体新奇恐惧症,但不同之处在于研究 3 将食物奖励与测试设备解耦(即改变任务-奖励关联)。对于所有三项研究,我们比较了接受同种动物示范的土狼与在测试前没有示范的对照组动物的表现。土狼在研究 1 中表现出社会学习;有示范者的土狼在解决难题箱时速度更快、成功率更高,但不一定使用与观察到的成功模式相同的模式。在研究 2 中,治疗组之间没有成功的差异,但这可能是因为每对中的只有一只土狼成功,因此成功土狼的结果被其不成功的伴侣所掩盖。在研究 3 中,治疗组之间没有成功的差异;只有两只土狼,都是有示范者的占主导地位、人工饲养的雄性,能够完成任务。然而,有示范者的土狼对物体的恐惧程度较低,表现为接近物体的潜伏期较短,并且更坚持,表现为在设备上工作的时间较长。社会等级是新奇事物恐惧症和坚持度的最佳预测指标,也是进入设备内进食时间(测试后物体新奇恐惧症的测量)的最佳模型中的保留因素。这些结果表明,土狼能够进行新任务的社会学习,但社会等级、新奇事物恐惧症和坚持度会影响它们的社会学习能力。本研究有助于了解动物如何获得环境信息的机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1fae/6619663/63bd2de4833a/pone.0218778.g001.jpg

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