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Rapid and repeated divergence of animal chemical signals in an island introduction experiment

(2020) JOURNAL OF ANIMAL ECOLOGY. 89(6). p.1458-1467
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Abstract
Studies of animal communication have documented myriad rapid, context-dependent changes in visual and acoustic signal design. In contrast, relatively little is known about the capacity of vertebrate chemical signals to rapidly respond, either plastically or deterministically, to changes in context. Four years following an experimental introduction of lizards to replicate experimental islets, we aimed to determine if chemical signal design of the experimental populations differed from that of the source population. In 2014, we translocated Podarcis erhardii lizards from a large, predator-rich island to each of five replicate predator-free islets. Mean population densities increased fivefold over the following 4 years and bite scars suggest significantly more intraspecific fighting among these experimental populations. In 2018, we analysed the chemical signal design of males in each of the experimental populations and compared it to the chemical signals of the source population. We found that males consistently presented a significantly more complex chemical signal compared to the source population. Moreover, their chemical signals were marked by high proportions of octadecanoic acid, oleic acid and alpha-tocopherol, the three compounds that are known to be associated with lizard territoriality and mate choice. Our island introduction experiment thus suggests that the chemical signal design of animals can shift rapidly and predictably in novel ecological contexts.
Keywords
chemical signal design, experimental evolution, Lacertidae, phenotypic plasticity, SEXUAL SELECTION, CHEMOSENSORY EXPLORATION, POPULATION-DENSITY, COLOR PATTERNS, ROCK LIZARDS, EVOLUTION, COMMUNICATION, DESIGN, SCENT, BEHAVIOR

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Citation

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MLA
Donihue, Colin M., et al. “Rapid and Repeated Divergence of Animal Chemical Signals in an Island Introduction Experiment.” JOURNAL OF ANIMAL ECOLOGY, vol. 89, no. 6, 2020, pp. 1458–67, doi:10.1111/1365-2656.13205.
APA
Donihue, C. M., Herrel, A., Martín, J., Foufopoulos, J., Pafilis, P., & Baeckens, S. (2020). Rapid and repeated divergence of animal chemical signals in an island introduction experiment. JOURNAL OF ANIMAL ECOLOGY, 89(6), 1458–1467. https://doi.org/10.1111/1365-2656.13205
Chicago author-date
Donihue, Colin M., Anthony Herrel, José Martín, Johannes Foufopoulos, Panayiotis Pafilis, and Simon Baeckens. 2020. “Rapid and Repeated Divergence of Animal Chemical Signals in an Island Introduction Experiment.” JOURNAL OF ANIMAL ECOLOGY 89 (6): 1458–67. https://doi.org/10.1111/1365-2656.13205.
Chicago author-date (all authors)
Donihue, Colin M., Anthony Herrel, José Martín, Johannes Foufopoulos, Panayiotis Pafilis, and Simon Baeckens. 2020. “Rapid and Repeated Divergence of Animal Chemical Signals in an Island Introduction Experiment.” JOURNAL OF ANIMAL ECOLOGY 89 (6): 1458–1467. doi:10.1111/1365-2656.13205.
Vancouver
1.
Donihue CM, Herrel A, Martín J, Foufopoulos J, Pafilis P, Baeckens S. Rapid and repeated divergence of animal chemical signals in an island introduction experiment. JOURNAL OF ANIMAL ECOLOGY. 2020;89(6):1458–67.
IEEE
[1]
C. M. Donihue, A. Herrel, J. Martín, J. Foufopoulos, P. Pafilis, and S. Baeckens, “Rapid and repeated divergence of animal chemical signals in an island introduction experiment,” JOURNAL OF ANIMAL ECOLOGY, vol. 89, no. 6, pp. 1458–1467, 2020.
@article{8660146,
  abstract     = {{Studies of animal communication have documented myriad rapid, context-dependent changes in visual and acoustic signal design. In contrast, relatively little is known about the capacity of vertebrate chemical signals to rapidly respond, either plastically or deterministically, to changes in context.

Four years following an experimental introduction of lizards to replicate experimental islets, we aimed to determine if chemical signal design of the experimental populations differed from that of the source population.

In 2014, we translocated Podarcis erhardii lizards from a large, predator-rich island to each of five replicate predator-free islets. Mean population densities increased fivefold over the following 4 years and bite scars suggest significantly more intraspecific fighting among these experimental populations. In 2018, we analysed the chemical signal design of males in each of the experimental populations and compared it to the chemical signals of the source population.

We found that males consistently presented a significantly more complex chemical signal compared to the source population. Moreover, their chemical signals were marked by high proportions of octadecanoic acid, oleic acid and alpha-tocopherol, the three compounds that are known to be associated with lizard territoriality and mate choice.

Our island introduction experiment thus suggests that the chemical signal design of animals can shift rapidly and predictably in novel ecological contexts.}},
  author       = {{Donihue, Colin M. and Herrel, Anthony and Martín, José and Foufopoulos, Johannes and Pafilis, Panayiotis and Baeckens, Simon}},
  issn         = {{0021-8790}},
  journal      = {{JOURNAL OF ANIMAL ECOLOGY}},
  keywords     = {{chemical signal design,experimental evolution,Lacertidae,phenotypic plasticity,SEXUAL SELECTION,CHEMOSENSORY EXPLORATION,POPULATION-DENSITY,COLOR PATTERNS,ROCK LIZARDS,EVOLUTION,COMMUNICATION,DESIGN,SCENT,BEHAVIOR}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{1458--1467}},
  title        = {{Rapid and repeated divergence of animal chemical signals in an island introduction experiment}},
  url          = {{http://doi.org/10.1111/1365-2656.13205}},
  volume       = {{89}},
  year         = {{2020}},
}

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