Environmental heterogeneity alters mate choice behavior for multimodal signals

Andrew D. Cronin, Michael J. Ryan, Rachel A. Page, Kimberly L. Hunter, Ryan C. Taylor

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Abstract: Animals frequently experience changes in their environment, including diel and seasonal shifts in abiotic and biotic factors. In addition to physiological and morphological changes, animals alter their behavior in response to environmental variation. This study examined the impacts of heterogeneous environments on mating behaviors. We examined both male and female túngara frog phonotactic responses to multimodal (audiovisual) and unimodal (acoustic) stimuli. We altered aspects of the physical environment by changing substrate (terrestrial and aquatic) and ambient light levels. Females demonstrated a similar preference for the audiovisual stimulus regardless of substrate but decreased latency to choose in an aquatic environment. When ambient light levels were increased (relative to darker control), females reversed their preference, avoiding the multimodal stimulus, but the latency to choose was unchanged. Males demonstrated no preference for the multimodal signal on either substrate, but like females, male latency was reduced in an aquatic environment. Different environments carry their own associated costs, including varying levels of predation risk. Increased light levels and an aquatic environment likely carry higher predation risk and therefore should lead to changes in female and male responses. Interestingly, these two environments do not cause uniform changes in female responses. The addition of an aquatic environment led to a reduction in latency, whereas an increase in ambient light levels induced a change in female mate preference. These findings demonstrate the importance of the environment on mating responses to multimodal signals. Significance statement: Responses to conspecific mating signals (e.g., mate preferences) have often been assumed to be static. In this study, we tested responses of both male and female túngara frogs to a multimodal (visual + vocal) advertisement signal under varying environmental conditions. Elevated light levels changed female responses to mating signals. When both sexes were required to swim, rather than walk to a signal, their choices did not change. They did respond faster, however. These results indicate that measuring the strength of sexual selection should be considered as a function of both innate preferences and the environmental conditions experienced by the animals.

Original languageEnglish
Article number43
Pages (from-to)1-10
Number of pages10
JournalBehavioral Ecology and Sociobiology
Volume73
Issue number4
Early online date9 Mar 2019
DOIs
Publication statusPublished - Apr 2019

Fingerprint

mate choice
mating behavior
aquatic environment
audiovisuals
predation risk
substrate
frog
environmental factors
frogs
animal
environmental conditions
predation
animals
biotic factor
sexual selection
acoustics
gender

Keywords

  • Environmental heterogeneity
  • Multimodal signaling
  • Sexual selection
  • Túngara frog

Cite this

Cronin, Andrew D. ; Ryan, Michael J. ; Page, Rachel A. ; Hunter, Kimberly L. ; Taylor, Ryan C. / Environmental heterogeneity alters mate choice behavior for multimodal signals. In: Behavioral Ecology and Sociobiology. 2019 ; Vol. 73, No. 4. pp. 1-10.
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abstract = "Abstract: Animals frequently experience changes in their environment, including diel and seasonal shifts in abiotic and biotic factors. In addition to physiological and morphological changes, animals alter their behavior in response to environmental variation. This study examined the impacts of heterogeneous environments on mating behaviors. We examined both male and female t{\'u}ngara frog phonotactic responses to multimodal (audiovisual) and unimodal (acoustic) stimuli. We altered aspects of the physical environment by changing substrate (terrestrial and aquatic) and ambient light levels. Females demonstrated a similar preference for the audiovisual stimulus regardless of substrate but decreased latency to choose in an aquatic environment. When ambient light levels were increased (relative to darker control), females reversed their preference, avoiding the multimodal stimulus, but the latency to choose was unchanged. Males demonstrated no preference for the multimodal signal on either substrate, but like females, male latency was reduced in an aquatic environment. Different environments carry their own associated costs, including varying levels of predation risk. Increased light levels and an aquatic environment likely carry higher predation risk and therefore should lead to changes in female and male responses. Interestingly, these two environments do not cause uniform changes in female responses. The addition of an aquatic environment led to a reduction in latency, whereas an increase in ambient light levels induced a change in female mate preference. These findings demonstrate the importance of the environment on mating responses to multimodal signals. Significance statement: Responses to conspecific mating signals (e.g., mate preferences) have often been assumed to be static. In this study, we tested responses of both male and female t{\'u}ngara frogs to a multimodal (visual + vocal) advertisement signal under varying environmental conditions. Elevated light levels changed female responses to mating signals. When both sexes were required to swim, rather than walk to a signal, their choices did not change. They did respond faster, however. These results indicate that measuring the strength of sexual selection should be considered as a function of both innate preferences and the environmental conditions experienced by the animals.",
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Environmental heterogeneity alters mate choice behavior for multimodal signals. / Cronin, Andrew D.; Ryan, Michael J.; Page, Rachel A.; Hunter, Kimberly L.; Taylor, Ryan C.

In: Behavioral Ecology and Sociobiology, Vol. 73, No. 4, 43, 04.2019, p. 1-10.

Research output: Contribution to JournalArticleAcademicpeer-review

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