Establishment in urbanized environments is associated with changes in physiology, behaviour, and problem-solving. We compared the speed of learning in urban and rural female common mynas, Acridotheres tristis, using a standard visual discrimination task followed by a reversal learning phase. We also examined how quickly each bird progressed through different stages of learning, including sampling and acquisition within both initial and reversal learning, and persistence following reversal. Based on their reliance on very different food resources, we expected urban mynas to learn and reversal learn more quickly but to sample new contingencies for proportionately longer before learning them. When quantified from first presentation to criterion achievement, urban mynas took more 20-trial blocks to learn the initial discrimination, as well as the reversed contingency, than rural mynas. More detailed analyses at the level of stage revealed that this was because urban mynas explored the novel cue-outcome contingencies for longer, and despite transitioning faster through subsequent acquisition, remained overall slower than rural females. Our findings draw attention to fine adjustments in learning strategies in response to urbanization and caution against interpreting the speed to learn a task as a reflection of cognitive ability.
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The research was funded by a FP7-PEOPLE-2013-IRSES research staff exchange grant to TB, SH, OG and ASG. OG was additionally supported by Gu227/16-1 and IF by an FWF grant (Y366-B17) to TB. We thank Nicole Ward and Mattsen Yeark for assisting with data collection and staff at the University of Newcastle Central Animal House for caring for the birds.
The original version of this article was revised: The fourth author’s name was incorrectly published as Thomas Bugynar. The correct name should read as Thomas Bugnyar.
This article is part of the Special Issue Animal cognition in a human-dominated world.
An erratum to this article is available at http://dx.doi.org/10.1007/s10071-017-1070-1.
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Federspiel, I.G., Garland, A., Guez, D. et al. Adjusting foraging strategies: a comparison of rural and urban common mynas (Acridotheres tristis). Anim Cogn 20, 65–74 (2017). https://doi.org/10.1007/s10071-016-1045-7