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The energetics of social signaling during roost location in Spix’s disc-winged bats

View ORCID ProfileGloriana Chaverri, View ORCID ProfilePaula Iturralde-Pólit, View ORCID ProfileNatalia Ivone Sandoval-Herrera, View ORCID ProfileAdarli Romero-Vásquez, Silvia Cháves-Ramírez, View ORCID ProfileMaria Sagot
doi: https://doi.org/10.1101/2020.09.24.312496
Gloriana Chaverri
1Sede del Sur, Universidad de Costa Rica, Golfito, CRI
2Smithsonian Tropical Research Institute, Balboa, Ancón, PAN
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  • For correspondence: gloriana.chaverri@ucr.ac.cr
Paula Iturralde-Pólit
1Sede del Sur, Universidad de Costa Rica, Golfito, CRI
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Natalia Ivone Sandoval-Herrera
3Department of Ecology and Evolutionary Biology, University of Toronto, Ontario, CAN
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Adarli Romero-Vásquez
4Escuela de Biología, Universidad de Costa Rica, San Pedro, CRI
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Silvia Cháves-Ramírez
5Escuela de Biología, Universidad Nacional, Heredia, CRI
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Maria Sagot
6Department of Biological Sciences, State University of New York at Oswego, New York, USA
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Abstract

Long-term social aggregations are maintained by multiple mechanisms, including the use of acoustic signals, which may nonetheless entail significant energetic costs. To date, however, no studies have gauged whether there are significant energetic costs to social call production in bats, which heavily rely on acoustic communication for a diversity of social tasks. We measure energetic expenditure during acoustic signaling in Spix’s disc-winged bats (Thyroptera tricolor), a species that commonly uses contact calls to locate the ephemeral furled leaves that they use for roosting. To determine the cost of sound production, we measured oxygen consumption using intermittent-flow respirometry methods, with and without social signaling. Our results show that the emission of contact calls significantly increases oxygen consumption; vocal individuals spent, on average, 12.42 kJ more during social signaling trials than they spent during silent trials. Furthermore, production of contact calls during longer periods increased oxygen consumption for males but not for females. We also found that as resting metabolic rates increased in males, there was a decreasing probability that they would emit response calls. These results provide support to the “allocation model”, which predicts that only individuals with lower self-maintenance costs can afford to spend energy in additional activities. Our results provide a step forward in our understanding of how physiology modulates behavior, specifically how the costs of call production and resting metabolic rates may explain the differences in vocal behavior among individuals.

Summary Statement Spix’s disc-winged bats constantly produce contact calls while searching for roosts, which we show significantly increases an individual’s metabolic rate.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted September 25, 2020.
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The energetics of social signaling during roost location in Spix’s disc-winged bats
Gloriana Chaverri, Paula Iturralde-Pólit, Natalia Ivone Sandoval-Herrera, Adarli Romero-Vásquez, Silvia Cháves-Ramírez, Maria Sagot
bioRxiv 2020.09.24.312496; doi: https://doi.org/10.1101/2020.09.24.312496
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The energetics of social signaling during roost location in Spix’s disc-winged bats
Gloriana Chaverri, Paula Iturralde-Pólit, Natalia Ivone Sandoval-Herrera, Adarli Romero-Vásquez, Silvia Cháves-Ramírez, Maria Sagot
bioRxiv 2020.09.24.312496; doi: https://doi.org/10.1101/2020.09.24.312496

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