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Wild common marmosets (Callithrix jacchus) employ spatial cognitive abilities to improve their food search and consumption: an experimental approach in small-scale space

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Abstract

The ability of an animal to integrate and retain spatial information of resources often depends on the spatial memory and the speed at which this memory crystallizes. These become especially important once foragers reach their target area. However, very little is known about how wild common marmosets encode spatial information when feeding rewards are near to each other in a small-scale space. With this in mind, we performed field experiments to test foraging decisions related to a small-scale space setting. Specifically, we tested the (i) short- and (ii) long-term spatial memory, as well as (iii) the ability to remember the spatial location of resources after a single visit (one-trial spatial learning). The study was conducted with four groups of wild common marmosets (Callithrix jacchus) living in a semiarid Caatinga environment. We observed that individuals were able to retain spatial information of food sources on both a short- and long-term basis and to learn the spatial location of these resources after a single visit. We suggest that such abilities during foraging can improve the search for scattered resources with fluctuations of food availability. Presumably, this would be particularly advantageous in Caatinga, with its vegetation exhibiting asynchronous phenological patterns. Altogether, our results demonstrate that common marmosets employ all three studied spatial cognitive abilities to improve their food search and consumption.

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Acknowledgements

We thank Dr. Geraldo Baracuhy for providing the Baracuhy Biological Field Station to conduct our research. We are also grateful to María Fernanda De la Fuente, Júlia Vasconcelos, and Yara Lima for their support and help during data collection. We also would like to thank Dr. Paul Garber for his help and advice during an earlier draft of this manuscript. This study was funded by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) (PVE n°88881.064998/2014-01) and by a Ph.D. grant from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) awarded to Filipa Abreu. The present study was conducted in accordance with Brazilian laws for the use of wild animals in research and was approved by Ethics Committee for Animal Use of the Federal Rural University of Pernambuco (license n°144/2014) and SISBio (license n°46770/1). In addition, the study has complied with the ethical standards in the treatment of their animals of University of Illinois for Animal Research (IACUC n°14263). The research adhered to the guidelines laid down by EC guide for animal experiments and Brazilian laws.

Funding

This study was funded by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) (PVE n°88881.064998/2014-01) and by a Ph.D. grant from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) awarded to Filipa Abreu.

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All authors contributed to the study conception and design. Data collection and analysis were performed by FA. All authors wrote and reviewed the manuscript. All authors read and approved the final manuscript.

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Correspondence to Filipa Abreu.

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The authors declare that they have no conflicts of interest.

Ethical approval

All procedures performed involving animals were in accordance with Brazilian laws for the use of wild animals in research and were approved by Ethics Committee for Animal Use of the Federal Rural University of Pernambuco (license n° 144/2014) and SISBio (license n°46770/1). In addition, the study has complied with the ethical standards in the treatment of their animals of University of Illinois for Animal Research (IACUC n°14263).

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Abreu, F., Souto, A. & Schiel, N. Wild common marmosets (Callithrix jacchus) employ spatial cognitive abilities to improve their food search and consumption: an experimental approach in small-scale space. Primates 61, 807–816 (2020). https://doi.org/10.1007/s10329-020-00826-1

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  • DOI: https://doi.org/10.1007/s10329-020-00826-1

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