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Symes LB, Robillard T, Martinson SJ, Dong J, Kernan CE, Miller CR, Ter Hofstede HM. Daily signaling rate and the duration of sound per signal are negatively related in Neotropical forest katydids. Integr Comp Biol 2021; 61:887-899. [PMID: 34137809 DOI: 10.1093/icb/icab138] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Researchers have long examined the structure of animal advertisement signals, but comparatively little is known about how often these signals are repeated and what factors predict variation in signaling rate across species. Here, we focus on acoustic advertisement signals to test the hypothesis that calling males experience a tradeoff between investment in the duration or complexity of individual calls and investment in signaling over long time periods. This hypothesis predicts that the number of signals that a male produces per 24 hours will negatively correlate with 1) the duration of sound that is produced in each call (the sum of all pulses) and 2) the number of sound pulses per call. To test this hypothesis, we measured call parameters and the number of calls produced per 24 hours in 16 species of sympatric phaneropterine katydids from the Panamanian rainforest. This assemblage also provided us with the opportunity to test a second taxonomically-specific hypothesis about signaling rates in taxa such as phaneropterine katydids that transition from advertisement calls to mating duets to facilitate mate localization. To establish duets, male phaneropterine katydids call and females produce a short acoustic reply. These duets facilitate searching by males, females, or both sexes, depending on the species. We test the hypothesis that males invest either in calling or in searching for females. This hypothesis predicts a negative relationship between how often males signal over 24 hours and how much males move across the landscape relative to females. For the first hypothesis, there was a strong negative relationship between the number of signals and the duration of sound that is produced in each signal, but we find no relationship between the number of signals produced per 24 hours and the number of pulses per signal. This result suggests the presence of cross-taxa tradeoffs that limit signal production and duration, but not the structure of individual signals. These tradeoffs could be driven by energetic limitations, predation pressure, signal efficacy, or other signaling costs. For the second hypothesis, we find a negative relationship between the number of signals produced per day and proportion of the light trap catch that is male, likely reflecting males investing either in calling or in searching. These cross-taxa relationships point to the presence of pervasive trade-offs that fundamentally shape the spatial and temporal dynamics of communication.
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Affiliation(s)
- Laurel B Symes
- Center for Conservation Bioacoustics, Cornell Lab of Ornithology, Cornell University, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA.,Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancón, Republic of Panamá.,Dartmouth College, Department of Biological Sciences, 78 College Street, Hanover, NH 03755, USA
| | - Tony Robillard
- Institut de Systématique, Evolution et Biodiversité (ISYEB), Muséum national d'Histoire naturelle, CNRS, SU, EPHE, UA, 57 rue Cuvier, CP 50, 75231 Paris Cedex 05, France
| | - Sharon J Martinson
- Center for Conservation Bioacoustics, Cornell Lab of Ornithology, Cornell University, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA.,Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancón, Republic of Panamá.,Dartmouth College, Department of Biological Sciences, 78 College Street, Hanover, NH 03755, USA
| | - Jiajia Dong
- Jiangsu Key Laboratory of Brain Disease and Bioinformation, Research Center for Biochemistry and Molecular Biology, College of Life Sciences, Xuzhou Medical University, Xuzhou 221004, China
| | - Ciara E Kernan
- Dartmouth College, Graduate Program in Ecology, Evolution, Environment and Society, Hanover, NH 03755, USA
| | - Colleen R Miller
- Department of Ecology and Evolutionary Biology, Cornell University
| | - Hannah M Ter Hofstede
- Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancón, Republic of Panamá.,Dartmouth College, Department of Biological Sciences, 78 College Street, Hanover, NH 03755, USA.,Dartmouth College, Graduate Program in Ecology, Evolution, Environment and Society, Hanover, NH 03755, USA
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2
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Shizuka D, Hudson EJ. To accept or reject heterospecific mates: behavioural decisions underlying premating isolation. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190484. [PMID: 32420857 DOI: 10.1098/rstb.2019.0484] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Premating isolation in animals involves decision-making processes that affect whether individuals accept or reject heterospecific mates. An integrative understanding of the behavioural processes underlying heterospecific acceptance can clarify the conditions under which premating isolation evolves. As an illustration, we review how Reeve's (Reeve 1989 Am. Nat. 133, 407-435. (doi:10.1086/284926)) acceptance threshold model can help make sense of patterns of premating isolation in nature. This model derives a threshold trait value for acceptance for rejection of recipients of an action (e.g. mating) based on the fitness consequences of these decisions. We show that the maintenance of partial reproductive isolation can be an outcome of optimal acceptance thresholds, even in the face of reinforcement. We also use this model to clarify how the composition of multispecies communities can shape premating isolation. The acceptance threshold model can also be viewed as the behavioural underpinning of reproductive character displacement and cascading reinforcement. Finally, we highlight potential limitations of the acceptance threshold model with respect to investigating the role of sexual selection in speciation, and we propose that integration of behavioural models in speciation research will help us gain a full picture of the mechanisms underlying premating isolation. This article is part of the theme issue 'Signal detection theory in recognition systems: from evolving models to experimental tests'.
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Affiliation(s)
- Daizaburo Shizuka
- School of Biological Sciences, University of Nebraska-Lincoln, 402 Manter Hall, Lincoln, NE 68588-0118, USA
| | - Emily J Hudson
- School of Biological Sciences, University of Nebraska-Lincoln, 402 Manter Hall, Lincoln, NE 68588-0118, USA.,Department of Biological Sciences, Vanderbilt University, Box 351634 Station B, Nashville, TN 37235-1634, USA
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Chatfield-Taylor W, Cole JA. Noisy neighbours among the selfish herd: a critical song distance mediates mate recognition within cicada emergences (Hemiptera: Cicadidae). Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/blz132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Cicadas probably experience mate recognition challenges as a result of the densities that may occur during adult emergence events, and in Okanagana, the most speciose genus of North American cicadas, high alpha diversities during protoperiodical emergences will exacerbate the mate recognition problem. Using 227 songs from 23 taxa, a linear plateau model regressed recognition potential, estimated from linear discriminant analysis, against song distance, revealing a critical song distance of 0.728 standard deviations in z-transformed song parameter space accompanied by a recognition of 91.6%. Based on detailed examination of museum specimen localities, field observations and habitat, taxa were classified as sympatric or allopatric. Sympatric species were separated by song distances that were significantly greater than this critical distance. As expected for mate recognition characters, little within-species variance was observed in the songs of most species, and the relationship between increases in syllable rate and improved recognition was one of diminishing returns. For several taxa that sang with extreme syllable rates of high variance, a mate recognition – sexual selection continuum is proposed. Along this continuum rapid rates simultaneously prevent mate recognition errors while signalling male quality to females.
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Affiliation(s)
| | - Jeffrey A Cole
- Natural Sciences Division, Pasadena City College, East Colorado Boulevard, Pasadena, CA, USA
- Entomology Section, Natural History Museum of Los Angeles County, Exposition Boulevard, Los Angeles, CA, USA
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Symes LB, Rodríguez RL, Höbel G. Beyond temperature coupling: Effects of temperature on ectotherm signaling and mate choice and the implications for communication in multispecies assemblages. Ecol Evol 2017; 7:5992-6002. [PMID: 28811890 PMCID: PMC5552914 DOI: 10.1002/ece3.3059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/15/2017] [Accepted: 01/28/2017] [Indexed: 11/30/2022] Open
Abstract
Many organisms share communication channels, generating complex signaling environments that increase the risk of signal interference. Variation in abiotic conditions, such as temperature, may further exacerbate signal interference, particularly in ectotherms. We tested the effects of temperature on the pulse rate of male signals in a community of Oecanthus tree crickets, and for one focal species we also assessed its effect on female pulse rate preferences and motivation to seek mates. We confirm prior findings of temperature-dependent signals that result in increasing signal similarity at lower temperatures. Temperature also affected several aspects of female preferences: The preferred pulse rate value was temperature dependent, and nearly perfectly coupled with signal pulse rate; the range of pulse rate values that females found attractive also increased with temperature. By contrast, the motivation of females to perform phonotaxis was unaffected by temperature. Thus, at lower temperatures the signals of closely related species were more similar and females more discriminating. However, because signal similarity increased more strongly than female discrimination, signal interference and the likelihood of mismating may increase as temperatures drop. We suggest that a community approach will be useful for understanding the role of environmental variability in the evolution of communication systems.
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Affiliation(s)
- Laurel B. Symes
- Department of Biological SciencesUniversity of WisconsinMilwaukeeWIUSA
- Department of Biological SciencesDartmouth CollegeHanoverNHUSA
| | | | - Gerlinde Höbel
- Department of Biological SciencesUniversity of WisconsinMilwaukeeWIUSA
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Mhatre N, Pollack G, Mason A. Stay tuned: active amplification tunes tree cricket ears to track temperature-dependent song frequency. Biol Lett 2017; 12:rsbl.2016.0016. [PMID: 27122007 DOI: 10.1098/rsbl.2016.0016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 04/04/2016] [Indexed: 12/12/2022] Open
Abstract
Tree cricket males produce tonal songs, used for mate attraction and male-male interactions. Active mechanics tunes hearing to conspecific song frequency. However, tree cricket song frequency increases with temperature, presenting a problem for tuned listeners. We show that the actively amplified frequency increases with temperature, thus shifting mechanical and neuronal auditory tuning to maintain a match with conspecific song frequency. Active auditory processes are known from several taxa, but their adaptive function has rarely been demonstrated. We show that tree crickets harness active processes to ensure that auditory tuning remains matched to conspecific song frequency, despite changing environmental conditions and signal characteristics. Adaptive tuning allows tree crickets to selectively detect potential mates or rivals over large distances and is likely to bestow a strong selective advantage by reducing mate-finding effort and facilitating intermale interactions.
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Affiliation(s)
- Natasha Mhatre
- Department of Biological Sciences, University of Toronto at Scarborough, Scarborough, Canada M1C 1A4
| | - Gerald Pollack
- Department of Biological Sciences, University of Toronto at Scarborough, Scarborough, Canada M1C 1A4
| | - Andrew Mason
- Department of Biological Sciences, University of Toronto at Scarborough, Scarborough, Canada M1C 1A4
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Verzijden MN, Svensson EI. Interspecific interactions and learning variability jointly drive geographic differences in mate preferences. Evolution 2016; 70:1896-903. [DOI: 10.1111/evo.12982] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/20/2016] [Accepted: 06/02/2016] [Indexed: 01/25/2023]
Affiliation(s)
- Machteld N. Verzijden
- Department of Biology, Evolutionary Ecology Unit; Lund University; SE-223 62 Lund Sweden
- Current Address: Aarhus Institute of Advanced Studies; Aarhus University; 8000 Aarhus Denmark
| | - Erik I. Svensson
- Department of Biology, Evolutionary Ecology Unit; Lund University; SE-223 62 Lund Sweden
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Symes LB, Ayres MP, Cowdery CP, Costello RA. Signal diversification inOecanthustree crickets is shaped by energetic, morphometric, and acoustic trade-offs. Evolution 2015; 69:1518-1527. [DOI: 10.1111/evo.12668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 04/15/2015] [Indexed: 11/29/2022]
Affiliation(s)
- L. B. Symes
- Department of Biological Sciences; Dartmouth College; Hanover New Hampshire 03755
- Department of Biological Sciences; University of Wisconsin; Milwaukee Wisconsin 53201
| | - M. P. Ayres
- Department of Biological Sciences; Dartmouth College; Hanover New Hampshire 03755
| | - C. P. Cowdery
- Department of Biological Sciences; Dartmouth College; Hanover New Hampshire 03755
| | - R. A. Costello
- Department of Biological Sciences; Dartmouth College; Hanover New Hampshire 03755
- Department of Biology; University of Virginia; Charlottesville Virginia 22904
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