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Lin FC, Lin SM, Godfrey SS. Hidden social complexity behind vocal and acoustic communication in non-avian reptiles. Philos Trans R Soc Lond B Biol Sci 2024; 379:20230200. [PMID: 38768204 DOI: 10.1098/rstb.2023.0200] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/08/2024] [Indexed: 05/22/2024] Open
Abstract
Social interactions are inevitable in the lives of most animals, since most essential behaviours require interaction with conspecifics, such as mating and competing for resources. Non-avian reptiles are typically viewed as solitary animals that predominantly use their vision and olfaction to communicate with conspecifics. Nevertheless, in recent years, evidence is mounting that some reptiles can produce sounds and have the potential for acoustic communication. Reptiles that can produce sound have an additional communicative channel (in addition to visual/olfactory channels), which could suggest they have a higher communicative complexity, the evolution of which is assumed to be driven by the need of social interactions. Thus, acoustic reptiles may provide an opportunity to unveil the true social complexity of reptiles that are usually thought of as solitary. This review aims to reveal the hidden social interactions behind the use of sounds in non-avian reptiles. Our review suggests that the potential of vocal and acoustic communication and the complexity of social interactions may be underestimated in non-avian reptiles, and that acoustic reptiles may provide a great opportunity to uncover the coevolution between sociality and communication in non-avian reptiles. This article is part of the theme issue 'The power of sound: unravelling how acoustic communication shapes group dynamics'.
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Affiliation(s)
- Feng-Chun Lin
- Department of Zoology, University of Otago , Dunedin, New Zealand
| | - Si-Min Lin
- School of Life Science, National Taiwan Normal University , Taipei, Taiwan
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2
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Loconsole M, Stancher G, Versace E. Crossmodal association between visual and acoustic cues in a tortoise ( Testudo hermanni). Biol Lett 2023; 19:20230265. [PMID: 37465911 PMCID: PMC10354690 DOI: 10.1098/rsbl.2023.0265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 06/29/2023] [Indexed: 07/20/2023] Open
Abstract
Humans spontaneously match information coming from different senses, in what we call crossmodal associations. For instance, high-pitched sounds are preferentially associated with small objects, and low-pitched sounds with larger ones. Although previous studies reported crossmodal associations in mammalian species, evidence for other taxa is scarce, hindering an evolutionary understanding of this phenomenon. Here, we provide evidence of pitch-size correspondence in a reptile, the tortoise Testudo hermanni. Tortoises showed a spontaneous preference to associate a small disc (i.e. visual information about size) with a high-pitch sound (i.e. auditory information) and a larger disc to a low-pitched sound. These results suggest that crossmodal associations may be an evolutionary ancient phenomenon, potentially an organizing principle of the vertebrate brain.
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Affiliation(s)
- Maria Loconsole
- School of Biological and Behavioural Sciences, Department of Biological and Experimental Psychology, Queen Mary University of London, London E1 4NS, UK
| | - Gionata Stancher
- Rovereto Civic Museum Foundation, Borgo Santa Caterina 41, 38068 Rovereto, Trentino, Italy
| | - Elisabetta Versace
- School of Biological and Behavioural Sciences, Department of Biological and Experimental Psychology, Queen Mary University of London, London E1 4NS, UK
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3
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Fan B, Wang Y, Huang X, Zhang X, Yang J, Jiang T. The Potential to Encode Detailed Information About Parasites in the Acoustic Signals of Chinese Horseshoe Bats (Rhinolophus sinicus). Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.908209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Condition-dependent acoustic signals that potentially reveal information about the signaler’s physical or physiological condition are common and important in the animal kingdom. Given the negative effects of parasites on the health and fitness of their hosts, it is reasonable to expect animal acoustic signals to reflect detailed information concerning parasite infection. However, despite previous studies having verified the potential of sexually selected vocalizations to provide information on parasitism based on the correlations between call acoustic properties and parasitism in some animal taxa, less is known about whether acoustic signals used in a non-sexual context also reflect parasite infection especially for highly vocal bats. We thus investigated the relationships between the acoustic properties of distress calls and echolocation pulses and the infestation intensity of gamasid mites and bat flies in Chinese horseshoe bats (Rhinolophus sinicus) to determine whether acoustic signals potentially contain information about parasite infection. We found that bats infected with more gamasid mites uttered significantly shorter echolocation pulses, suggesting that echolocation pulses may contain information on the intensity of mite infection. Additionally, bats infected with more gamasid mites emitted distress calls with narrower bandwidth, while bats with more bat flies emitted calls with longer pause duration. These results suggest that distress calls may not only reflect a signaler’s parasite infection intensity but also may provide information concerning infection with specific parasites. In short, our findings suggest that acoustic signals of bats potentially reflect detailed information about parasite infection.
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Dougherty LR. Meta-analysis reveals that animal sexual signalling behaviour is honest and resource based. Nat Ecol Evol 2021; 5:688-699. [PMID: 33723423 DOI: 10.1038/s41559-021-01409-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 02/05/2021] [Indexed: 01/31/2023]
Abstract
Animals often need to signal to attract mates and behavioural signalling may impose substantial energetic and fitness costs to signallers. Consequently, individuals often strategically adjust signalling effort to maximize the fitness payoffs of signalling. An important determinant of these payoffs is individual state, which can influence the resources available to signallers, their likelihood of mating and their motivation to mate. However, empirical studies often find contradictory patterns of state-based signalling behaviour. For example, individuals in poor condition may signal less than those in good condition to conserve resources (ability-based signalling) or signal more to maximize short-term reproductive success (needs-based signalling). To clarify this relationship, I systematically searched for published studies examining animal sexual signalling behaviour in relation to six aspects of individual state: age, mated status, attractiveness, body size, condition and parasite load. Across 228 studies and 147 species, individuals (who were predominantly male) invested more into behavioural signalling when in good condition. Overall, this suggests that animal sexual signalling behaviour is generally honest and ability-based. However, the magnitude of state-dependent plasticity was small and there was a large amount of between-study heterogeneity that remains unexplained.
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Affiliation(s)
- Liam R Dougherty
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Liverpool, UK.
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De Nardo AN, Roy J, Sbilordo SH, Lüpold S. Condition-dependent interaction between mating success and competitive fertilization success in Drosophila melanogaster. Evolution 2021; 75:2014-2026. [PMID: 33834478 DOI: 10.1111/evo.14228] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 02/06/2021] [Accepted: 03/13/2021] [Indexed: 12/12/2022]
Abstract
Dietary restriction during development can affect adult body size and condition. In many species, larger (high-condition) males gain higher mating success through male-male competition and female choice, and female condition can affect the extent of both female mate choice and male investment in courtship or ejaculates. However, few studies have examined the joint effects and interplay of male and female condition during both the pre- and the postcopulatory phases of sexual selection. We therefore manipulated the larval diet of male and female Drosophila melanogaster to study how body size variation in both sexes biases competitive outcomes at different reproductive stages, from mating to paternity. We did not find a difference in mate preference or mating latency between females of different conditions, nor any interaction between male and female conditions. However, large males were more successful in gaining matings, but only when in direct competition, whereas mating latencies were shorter for low-condition males in noncompetitive settings. Small males also transferred more sperm to nonvirgin females, displaced a larger proportion of resident sperm, and achieved higher paternity shares per mating than large males. In agreement with existing theory, we suggest that small males might partially compensate for their low mating success by strategically investing in larger sperm numbers and potentially other, unmeasured ejaculate traits, when they do have a mating opportunity.
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Affiliation(s)
- Alessio N De Nardo
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, CH-8057, Switzerland
| | - Jeannine Roy
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, CH-8057, Switzerland
| | - Sonja H Sbilordo
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, CH-8057, Switzerland
| | - Stefan Lüpold
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, CH-8057, Switzerland
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Bent AM, Ings TC, Mowles SL. Does anthropogenic noise affect the acoustic courtship interactions of Gryllus bimaculatus? Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Russell AP, Bauer AM. Vocalization by extant nonavian reptiles: A synthetic overview of phonation and the vocal apparatus. Anat Rec (Hoboken) 2020; 304:1478-1528. [PMID: 33099849 DOI: 10.1002/ar.24553] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 08/13/2020] [Accepted: 09/16/2020] [Indexed: 12/19/2022]
Abstract
Among amniote vertebrates, nonavian reptiles (chelonians, crocodilians, and lepidosaurs) are regarded as using vocal signals rarely (compared to birds and mammals). In all three reptilian clades, however, certain taxa emit distress calls and advertisement calls using modifications of regions of the upper respiratory tract. There is no central tendency in either acoustic mechanisms or the structure of the vocal apparatus, and many taxa that vocalize emit only relatively simple sounds. Available evidence indicates multiple origins of true vocal abilities within these lineages. Reptiles thus provide opportunities for studying the early evolutionary stages of vocalization. The early literature on the diversity of form of the laryngotracheal apparatus of reptiles boded well for the study of form-function relationships, but this potential was not extensively explored. Emphasis shifted away from anatomy, however, and centered instead on acoustic analysis of the sounds that are produced. New investigative techniques have provided novel ways of studying the form-function aspects of the structures involved in phonation and have brought anatomical investigation to the forefront again. In this review we summarize what is known about hearing in reptiles in order to contextualize the vocal signals they generate and the sound-producing mechanisms responsible for them. The diversity of form of the sound producing apparatus and the increasing evidence that reptiles are more dependent upon vocalization as a communication medium than previously thought indicates that they have a significant role to play in the understanding of the evolution of vocalization in amniotes.
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Affiliation(s)
- Anthony P Russell
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Aaron M Bauer
- Department of Biology and Center for Biodiversity and Ecosystem Stewardship, Villanova University, Villanova, Pennsylvania, USA
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Fischer A, Goh XH, Varney JLS, Blake AJ, Takács S, Gries G. Multimodal and multifunctional signaling? - Web reduction courtship behavior in a North American population of the false black widow spider. PLoS One 2020; 15:e0228988. [PMID: 32101544 PMCID: PMC7043733 DOI: 10.1371/journal.pone.0228988] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 01/27/2020] [Indexed: 01/18/2023] Open
Abstract
Males of widow spiders courting on the web of females engage in web-reduction behavior which entails excising a section of the web, bundling it up, and wrapping it with their silk. Males of the false black widow spider, Steatoda grossa, in European populations also produce stridulatory courtship sound which has not yet been studied in their invaded North American range. Working with a North American population of S. grossa, we tested the hypotheses that (1) web reduction by males renders webs less attractive to rival males; (2) deposition of silk by courting males has an inter-sexual (male-female) signal function that enhances their likelihood of copulation; and (3) stridulatory sound is a courtship signal of males. Testing anemotactic attraction of males in Y-tube olfactometer experiments revealed that reduced webs (indicative of a mated female) and intact webs (indicative of a virgin female) were equally attractive to males. Recording courtship behavior of males with either functional (silk-releasing) spinnerets or spinnerets experimentally occluded on the web of virgin females showed that males with functional spinnerets were more likely to copulate with the female they courted. Although males possess the stridulatory apparatus to produce courtship sound, they did not stridulate when courting or copulating on the web of females. Our data support the conclusion that web-reduction behavior of S. grossa males in their invaded North American range has no long-range effect on mate seeking males. Instead, web-reduction behavior has an inter-sexual signaling function that seems to be linked to functional spinnerets of the courting male. The signal produced by a male likely entails a volatile silk-borne pheromone, but may also embody a gauge of his endurance (the amount of time he engages in web reduction causing web vibrations).
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Affiliation(s)
- Andreas Fischer
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Xiang Hao Goh
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
| | | | - Adam J. Blake
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Stephen Takács
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Gerhard Gries
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
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Ferrara CR, Vogt RC, Sousa-Lima RS, Lenz A, Morales-Mávil JE. Sound Communication in Embryos and Hatchlings of Lepidochelys kempii. CHELONIAN CONSERVATION AND BIOLOGY 2019. [DOI: 10.2744/ccb-1386.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Richard C. Vogt
- Department of Biodiversity, Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas, Brazil cep 69083.000 []
| | | | - Anna Lenz
- Instituto de Neuroetologia, Universidad Veracruzana, Jalapa, Veracruz, México [; ]
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Monteiro CC, Carmo HM, Santos AJ, Corso G, Sousa-Lima RS. First Record of Bioacoustic Emission in Embryos and Hatchlings of Hawksbill Sea Turtles (Eretmochelys imbricata). CHELONIAN CONSERVATION AND BIOLOGY 2019. [DOI: 10.2744/ccb-1382.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Cibele C. Monteiro
- Centro de Biociências, Programa de Pós-graduação em Ciências Biológicas, UFRN Campus Universitário, Natal, Rio Grande do Norte 59078-972 Brazil [; ]
| | - Hayane M.A. Carmo
- Centro de Biociências, Programa de Pós-graduação em Ciências Biológicas, UFRN Campus Universitário, Natal, Rio Grande do Norte 59078-972 Brazil [; ]
| | - Armando J.B. Santos
- Fundação Pró-TAMAR, Caixa Postal 3348, Parnamirim, Rio Grande do Norte 59082-971 Brazil []
| | - Gilberto Corso
- Centro de Biociências, Departamento de Biofísica e Farmacologia, UFRN Campus Universitário, Natal, Rio Grande do Norte 59078-972 Brazil []
| | - Renata S. Sousa-Lima
- Centro de Biociências, Departamento de Fisiologia e Comportamento, UFRN Campus Universitário, Natal, Rio Grande do Norte 59078-972 Brazil, Laboratório de Bioacústica []
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11
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Ferrara CR, Vogt RC, Eisemberg CC, Doody JS. First Evidence of the Pig-nosed Turtle (Carettochelys insculpta) Vocalizing Underwater. COPEIA 2017. [DOI: 10.1643/ce-16-407] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Farke CM, Olek K, Gerding WM, Distler C. Multiple paternity and sperm storage in captive Hermann's tortoises, Testudo hermanni boettgeri determined from amniotic fluid adhering to the eggshell. Mol Cell Probes 2015; 29:254-7. [PMID: 26003400 DOI: 10.1016/j.mcp.2015.05.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 05/11/2015] [Accepted: 05/11/2015] [Indexed: 11/25/2022]
Abstract
We identified multiple paternity in 52.9% of the clutches of Hermann's tortoise Testudo hermanni boettgeri using polymorphic microsatellite markers. In addition we demonstrated sperm storage across seasons. DNA was extracted from the amniotic fluid adhering to the eggshell's inner surface, a procedure suitable for easy, non-invasive DNA sampling in conservation and breeding programs. To improve the informative value of monomorphic single tandem repeat (STR) markers we additionally analyzed single nucleotide polymorphism (SNP) variability.
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Affiliation(s)
- C M Farke
- Allgemeine Zoologie und Neurobiologie, Ruhr-Universität Bochum, Universitätsstr. 150, ND 7/27, 44780 Bochum, Germany.
| | - K Olek
- Labor für Abstammungsbegutachtungen GMBH, Marie-Curie-Str. 1, 53359 Rheinbach, Germany.
| | - W M Gerding
- Humangenetik, Ruhr-Universität Bochum, Universitätsstr. 150, MA 5/39, 44780 Bochum, Germany.
| | - C Distler
- Allgemeine Zoologie und Neurobiologie, Ruhr-Universität Bochum, Universitätsstr. 150, ND 7/27, 44780 Bochum, Germany.
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Ferrara CR, Vogt RC, Harfush MR, Sousa-Lima RS, Albavera E, Tavera A. First Evidence of Leatherback Turtle (Dermochelys coriacea) Embryos and Hatchlings Emitting Sounds. CHELONIAN CONSERVATION AND BIOLOGY 2014. [DOI: 10.2744/ccb-1045.1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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14
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Ferrara CR, Mortimer JA, Vogt RC. First Evidence that Hatchlings ofChelonia mydasEmit Sounds. COPEIA 2014. [DOI: 10.1643/ce-13-087] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Cutuli G, Cannicci S, Vannini M, Fratini S. Influence of male courtship intensity and male-male competition on paternity distribution in Hermann's tortoise,Testudo hermanni hermanni(Chelonia: Testudinidae). Biol J Linn Soc Lond 2014. [DOI: 10.1111/bij.12243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Giulia Cutuli
- Department of Biology; University of Florence; via Madonna del Piano 6 I-50019 Sesto Fiorentino Italy
| | - Stefano Cannicci
- Department of Biology; University of Florence; via Madonna del Piano 6 I-50019 Sesto Fiorentino Italy
| | - Marco Vannini
- Department of Biology; University of Florence; via Madonna del Piano 6 I-50019 Sesto Fiorentino Italy
| | - Sara Fratini
- Department of Biology; University of Florence; via Madonna del Piano 6 I-50019 Sesto Fiorentino Italy
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Influence of mating order on courtship displays and stored sperm utilization in Hermann's tortoises (Testudo hermanni hermanni). Behav Ecol Sociobiol 2012. [DOI: 10.1007/s00265-012-1447-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Sacchi R, Scali S, Cavirani V, Pupin F, Pellitteri-Rosa D, Zuffi MAL. Leukocyte differential counts and morphology from twelve European lizards. ACTA ACUST UNITED AC 2011. [DOI: 10.1080/11250003.2011.568014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Vergne AL, Aubin T, Taylor P, Mathevon N. Acoustic signals of baby black caimans. ZOOLOGY 2011; 114:313-20. [DOI: 10.1016/j.zool.2011.07.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 07/06/2011] [Accepted: 07/13/2011] [Indexed: 10/17/2022]
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Galeotti P, Sacchi R, Pellitteri-Rosa D, Fasola M. The yellow cheek-patches of the Hermann's tortoise (Reptilia, Chelonia): Sexual dimorphism and relationship with body condition. ACTA ACUST UNITED AC 2011. [DOI: 10.1080/11250003.2011.561260] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Longpre KM, Koepfinger ME, Katz LS. Female goats use courtship display as an honest indicator of male quality. Horm Behav 2011; 60:505-11. [PMID: 21846470 DOI: 10.1016/j.yhbeh.2011.07.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 07/28/2011] [Accepted: 07/31/2011] [Indexed: 11/21/2022]
Abstract
Due to the differential cost of reproduction in promiscuous species, like domesticated goat(s) (Capra hircus), it is expected that females should mate with higher quality males, while males should mate with a greater number of females. Females may use conspicuous secondary sexual characteristics of males such as courtship display to distinguish among high and low quality males. Testosterone (T) controls a large suite of secondary sexual characteristics and variation in T concentrations may account of differences in courtship rates. Two studies were conducted to examine the relationship between T concentrations and courtship rate and its role in mammalian female mate choice. Experiment 1 utilized bucks (intact males) and Experiment 2 utilized T-replaced wethers (castrated pre-pubertally). During the first year of Experiment 2, T-replaced wethers received either vehicle control (CON), 25mg or 100mg testosterone propionate (TP). During the second year of Experiment 2, T-replaced wethers were treated with either 5mg, 15 mg or 25mg TP. For all experiments, mean courtship rates and circulating T concentrations were measured, as well as female preference for males displaying different courtship frequencies. T concentrations and courtship rate were positively correlated for bucks and estrous females preferred high courting bucks. Males receiving 25mg and 100mg TP courted females at a similar rate, but both were significantly higher than courtship rates of the CON wethers. Courtship rates of the 25mg, 15 mg and 5mg TP-treated males were all significantly different. Females did not show a preference between the 100mg or 25mg TP-treated wethers, however both were preferred in comparison to the CON wethers. Females did not show preference between the 25mg or 15 mg TP-treated wethers, however both were preferred in comparison to the 5mg TP-treated wethers. Taken together, these studies suggest that courtship rate is T-dependent. Further, females can use courtship rate to distinguish among males.
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Pellitteri-Rosa D, Sacchi R, Galeotti P, Marchesi M, Fasola M. Courtship Displays Are Condition-Dependent Signals That Reliably Reflect Male Quality in Greek Tortoises,Testudo graeca. CHELONIAN CONSERVATION AND BIOLOGY 2011. [DOI: 10.2744/ccb-0840.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Pellitteri-Rosa D, Sacchi R, Galeotti P, Marchesi M, Fasola M. Do Hermann's tortoises (Testudo hermanni) discriminate colours? An experiment with natural and artificial stimuli. ACTA ACUST UNITED AC 2010. [DOI: 10.1080/11250000903464067] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Paquette SR, Louis EE, Lapointe FJ. Microsatellite Analyses Provide Evidence of Male-Biased Dispersal in the Radiated Tortoise Astrochelys radiata (Chelonia: Testudinidae). J Hered 2010; 101:403-12. [PMID: 20308081 DOI: 10.1093/jhered/esq020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Sébastien Rioux Paquette
- Allan Wilson Centre for Molecular Ecology and School of Biological Sciences, Victoria University of Wellington, Wellington 6140, New Zealand.
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25
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Giles JC, Davis JA, McCauley RD, Kuchling G. Voice of the turtle: the underwater acoustic repertoire of the long-necked freshwater turtle, Chelodina oblonga. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2009; 126:434-443. [PMID: 19603900 DOI: 10.1121/1.3148209] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Chelodina oblonga is a long-necked, freshwater turtle found predominantly in the wetlands on the Swan Coastal Plain of Western Australia. Turtles from three populations were recorded in artificial environments set up to simulate small wetlands. Recordings were undertaken from dawn to midnight. A vocal repertoire of 17 categories was described for these animals with calls consisting of both complex and percussive spectral structures. Vocalizations included clacks, clicks, squawks, hoots, short chirps, high short chirps, medium chirps, long chirps, high calls, cries or wails, hooos, grunts, growls, blow bursts, staccatos, a wild howl, and drum rolling. Also, a sustained vocalization was recorded during the breeding months, consisting of pulse sequences that finished rhythmically. This was hypothesized to function as an acoustic advertisement display. Chelodina oblonga often lives in environments where visibility is restricted due to habitat complexity or poor light transmission due to tannin-staining or turbidity. Thus the use of sound by turtles may be an important communication medium over distances beyond their visual range. This study reports the first records of an underwater acoustic repertoire in an aquatic chelonian.
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Affiliation(s)
- Jacqueline C Giles
- School of Environmental Science, Murdoch University, Murdoch, Perth 6150, Western Australia.
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26
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Galeotti P, Sacchi R, Rosa DP, Fasola M. Olfactory Discrimination of Species, Sex, and Sexual Maturity by the Hermann's Tortoise Testudo Hermanni. COPEIA 2007. [DOI: 10.1643/0045-8511(2007)7[980:odossa]2.0.co;2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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