201
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Viblanc VA, Dobson FS, Stier A, Schull Q, Saraux C, Gineste B, Pardonnet S, Kauffmann M, Robin JP, Bize P. Mutually honest? Physiological ‘qualities’ signalled by colour ornaments in monomorphic king penguins. Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12729] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Vincent A. Viblanc
- Department of Ecology and Evolution; University of Lausanne; Lausanne CH-1015 Switzerland
- Centre d'Ecologie Fonctionnelle et Evolutive; Equipe Ecologie Comportementale; UMR 5175 CNRS; 1919 route de Mende Montpellier 34293 France
| | - F. Stephen Dobson
- Centre d'Ecologie Fonctionnelle et Evolutive; Equipe Ecologie Comportementale; UMR 5175 CNRS; 1919 route de Mende Montpellier 34293 France
- Department of Biological Sciences; Auburn University; 311 Funchess Hall Auburn AL 36849 USA
| | - Antoine Stier
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Quentin Schull
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Claire Saraux
- IFREMER; UMR MARBEC; Avenue Jean Monnet BP 171 Sète Cedex 34203 France
| | - Benoit Gineste
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Sylvia Pardonnet
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Marion Kauffmann
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Jean-Patrice Robin
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Pierre Bize
- Department of Ecology and Evolution; University of Lausanne; Lausanne CH-1015 Switzerland
- Institute of Biological and Environmental Sciences; University of Aberdeen; Scotland UK
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202
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Delhey K. The colour of an avifauna: A quantitative analysis of the colour of Australian birds. Sci Rep 2015; 5:18514. [PMID: 26679370 PMCID: PMC4683462 DOI: 10.1038/srep18514] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 11/03/2015] [Indexed: 12/02/2022] Open
Abstract
Animal coloration is a poorly-understood aspect of phenotypic variability. Here I expand initial studies of the colour gamut of birds by providing the first quantitative description of the colour variation of an entire avifauna: Australian landbirds (555 species). The colour of Australian birds occupies a small fraction (19%) of the entire possible colour space and colour variation is extremely uneven. Most colours are unsaturated, concentrated in the centre of colour space and based on the deposition of melanins. Other mechanisms of colour production are less common but account for larger portions of colour space and for most saturated colours. Male colours occupy 45–25% more colour space than female colours, indicating that sexual dichromatism translates into a broader range of male colours. Male-exclusive colours are often saturated, at the edge of chromatic space, and have most likely evolved for signalling. While most clades of birds occupy expected or lower-than-expected colour volumes, parrots and cockatoos (Order Psittaciformes) occupy a much larger volume than expected. This uneven distribution of colour variation across mechanisms of colour production, sexes and clades is probably shared by avifaunas in other parts of the world, but this remains to be tested with comparable data.
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Affiliation(s)
- Kaspar Delhey
- School of Biological Sciences, Monash University, Clayton, Victoria, Australia.,Max Planck Institute for Ornithology, Radolfzell, 78315, Germany
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203
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Lloyd-Jones DJ, Briskie JV. Mutual Wattle Ornaments in the South Island Saddleback (Philesturnus carunculatus) Function as Armaments. Ethology 2015. [DOI: 10.1111/eth.12446] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- David J. Lloyd-Jones
- School of Biological Sciences; University of Canterbury; Christchurch New Zealand
| | - James V. Briskie
- School of Biological Sciences; University of Canterbury; Christchurch New Zealand
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204
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López-Rull I, Vergara P, Martínez-Padilla J, Fargallo JA. Early constraints in sexual dimorphism: survival benefits of feminized phenotypes. J Evol Biol 2015; 29:231-40. [DOI: 10.1111/jeb.12779] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 10/17/2015] [Accepted: 10/19/2015] [Indexed: 11/30/2022]
Affiliation(s)
- I. López-Rull
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid España
| | - P. Vergara
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid España
| | - J. Martínez-Padilla
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid España
| | - J. A. Fargallo
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid España
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205
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Dale J, Dey CJ, Delhey K, Kempenaers B, Valcu M. The effects of life history and sexual selection on male and female plumage colouration. Nature 2015; 527:367-70. [DOI: 10.1038/nature15509] [Citation(s) in RCA: 238] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 08/21/2015] [Indexed: 11/09/2022]
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206
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Female and male song rates across breeding stage: testing for sexual and nonsexual functions of female song. Anim Behav 2015. [DOI: 10.1016/j.anbehav.2015.07.034] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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207
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Tibbetts EA, Forrest T, Vernier C, Jinn J, Madagame A. Socially selected ornaments and fitness: Signals of fighting ability in paper wasps are positively associated with survival, reproductive success, and rank. Evolution 2015; 69:2917-26. [PMID: 26456701 DOI: 10.1111/evo.12793] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 09/14/2015] [Accepted: 09/23/2015] [Indexed: 11/29/2022]
Abstract
Many animals have ornaments that mediate choice and competition in social and sexual contexts. Individuals with elaborate sexual ornaments typically have higher fitness than those with less elaborate ornaments, but less is known about whether socially selected ornaments are associated with fitness. Here, we test the relationship between fitness and facial patterns that are a socially selected signal of fighting ability in Polistes dominula wasps. We found wasps that signal higher fighting ability have larger nests, are more likely to survive harsh winters, and obtain higher dominance rank than wasps that signal lower fighting ability. In comparison, body weight was not associated with fitness. Larger wasps were dominant over smaller wasps, but showed no difference in nest size or survival. Overall, the positive relationship between wasp facial patterns and fitness indicates that receivers can obtain diverse information about a signaler's phenotypic quality by paying attention to socially selected ornaments. Therefore, there are surprisingly strong parallels between the information conveyed by socially and sexually selected signals. Similar fitness relationships in social and sexually selected signals may be one reason it can be difficult to distinguish the role of social versus sexual selection in ornament evolution.
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Affiliation(s)
- Elizabeth A Tibbetts
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109.
| | - Taylor Forrest
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109
| | - Cassondra Vernier
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109.,Current Address: Department of Biology, Washington University St. Louis, St. Louis, Missouri
| | - Judy Jinn
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109.,Current Address: Department of Psychology, University of California, Berkeley, California
| | - Andrew Madagame
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, 48109
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208
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Cain KE, Cockburn A, Langmore NE. Female song rates in response to simulated intruder are positively related to reproductive success. Front Ecol Evol 2015. [DOI: 10.3389/fevo.2015.00119] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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209
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Candolin U, Tukiainen I. The sexual selection paradigm: have we overlooked other mechanisms in the evolution of male ornaments? Proc Biol Sci 2015; 282:20151987. [PMID: 26446811 DOI: 10.1098/rspb.2015.1987] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Extravagant male ornaments expressed during reproduction are almost invariably assumed to be sexually selected and evolve through competition for mating opportunities. Yet in species where male reproductive success depends on the defence of offspring, male ornaments could also evolve through social competition for offspring survival. However, in contrast to female ornaments, this possibility has received little attention in males. We show that a male ornament that is traditionally assumed to be sexually selected--the red nuptial coloration of the three-spined stickleback--is under stronger selection for offspring survival than for mating success. Males express most coloration during parenting, when they no longer attract females, and the colour correlates with nest retention and hatching success but not with attractiveness to females. This contradicts earlier assumptions and suggests that social selection for offspring survival rather than for sexual selection for mating success is the main mechanism maintaining the ornament in the population. These results suggest that we should consider other forms of social selection beyond sexual selection when seeking to explain the function and evolution of male ornaments. An incorrect assignment of selection pressures could hamper our understanding of evolution.
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Affiliation(s)
- Ulrika Candolin
- Department of Biosciences, University of Helsinki, PO Box 65, 00014 Helsinki, Finland
| | - Iina Tukiainen
- Department of Biosciences, University of Helsinki, PO Box 65, 00014 Helsinki, Finland
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210
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Keddar I, Altmeyer S, Couchoux C, Jouventin P, Dobson FS. Mate Choice and Colored Beak Spots of King Penguins. Ethology 2015. [DOI: 10.1111/eth.12419] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ismaël Keddar
- CNRS; UMR 5175; Centre d'Ecologie Fonctionnelle et Evolutive; Montpellier France
| | - Sophie Altmeyer
- CNRS; UMR 5175; Centre d'Ecologie Fonctionnelle et Evolutive; Montpellier France
| | - Charline Couchoux
- Département des Sciences Biologiques; Université du Québec à Montréal; Montréal QC Canada
| | - Pierre Jouventin
- CNRS; UMR 5175; Centre d'Ecologie Fonctionnelle et Evolutive; Montpellier France
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211
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Color ornaments and territory position in king penguins. Behav Processes 2015; 119:32-7. [PMID: 26168874 DOI: 10.1016/j.beproc.2015.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/22/2015] [Accepted: 07/03/2015] [Indexed: 11/22/2022]
Abstract
King penguins exhibit mutual color ornamentation of feathers and beak color. They breed in dense colonies and produce a single chick every 2 years. Thus, males and females must choose partners carefully to be reproductively successful, and auricular patches of males and UV coloration of beak spots have been shown to influence mate choice. Position in the breeding colony is also important to reproductive success, with pairs on the edge of the colony less successful than those in the center. We studied the mutual ornaments, individual condition, and position of pairs in their breeding colony. Males were significantly larger than females in size, body mass, and auricular patch size. Within pairs, auricular patch size of males and females were significantly correlated, and male auricular patch size and body mass were significantly associated, suggesting a link between this ornament and male body condition. Moving from the edge to the center of the colony, pairs had larger yellow-orange auricular patches, indicating a link between this ornament and settlement in higher quality territories in the center of the colony. Pairs were also less brightly brown colored on the breast and less saturated in UV color of the beak spot. Since we observed pairs that were settling for egg laying, location in the colony may have reflected aspects of pair condition, rather than later jockeying for positioning using ornaments as signals of behavioral dominance.
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212
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Gwynne DT, Punzalan D, Hunt J. Viability selection on female fly finery in the wild. Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12606] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Darryl T. Gwynne
- Biology Dept University of Toronto Mississauga; 3359 Mississauga Road Mississauga ON L5L 1C6 Canada
| | - David Punzalan
- Royal Ontario Museum; 100 Queen's Park Toronto ON M5S 2C6 Canada
| | - John Hunt
- Daphne du Maurier Centre for Ecology and Conservation; College of Life and Environmental Sciences; University of Exeter; Cornwall Campus TR10 9FE UK
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213
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Cantarero A, Laaksonen T, Järvistö PE, Gil D, López-Arrabé J, Redondo AJ, Moreno J. Nest Defence Behaviour and Testosterone Levels in Female Pied Flycatchers. Ethology 2015. [DOI: 10.1111/eth.12407] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Toni Laaksonen
- Department of Biology; University of Turku; Turku Finland
| | | | - Diego Gil
- Museo Nacional de Ciencias Naturales - CSIC; Dpto Ecología Evolutiva; Madrid Spain
| | - Jimena López-Arrabé
- Museo Nacional de Ciencias Naturales - CSIC; Dpto Ecología Evolutiva; Madrid Spain
| | | | - Juan Moreno
- Museo Nacional de Ciencias Naturales - CSIC; Dpto Ecología Evolutiva; Madrid Spain
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214
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Smith AJ, Nelson-Maney N, Parsons KJ, James Cooper W, Craig Albertson R. Body Shape Evolution in Sunfishes: Divergent Paths to Accelerated Rates of Speciation in the Centrarchidae. Evol Biol 2015. [DOI: 10.1007/s11692-015-9322-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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215
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Gonzalez-Santoyo I, Wheatley JR, Welling LLM, Cárdenas RA, Jimenez-Trejo F, Dawood K, Puts DA. The face of female dominance: Women with dominant faces have lower cortisol. Horm Behav 2015; 71:16-21. [PMID: 25857930 DOI: 10.1016/j.yhbeh.2015.03.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 03/29/2015] [Accepted: 03/30/2015] [Indexed: 11/28/2022]
Abstract
The human face displays a wealth of information, including information about dominance and fecundity. Dominance and fecundity are also associated with lower concentrations of the stress hormone cortisol, suggesting that cortisol may negatively predict facial dominance and attractiveness. We digitally photographed 61 women's faces, had these images rated by men and women for dominance, attractiveness, and femininity, and explored relationships between these perceptions and women's salivary cortisol concentrations. In a first study, we found that women with more dominant-appearing, but not more attractive, faces had lower cortisol levels. These associations were not due to age, ethnicity, time since waking, testosterone, or its interaction with cortisol. In a second study, composite images of women with low cortisol were perceived as more dominant than those of women with high cortisol significantly more often than chance by two samples of viewers, with a similar but non-significant trend in a third sample. However, data on perceptions of attractiveness were mixed; low-cortisol images were viewed as more attractive by two samples of US viewers and as less attractive by a sample of Mexican viewers. Our results suggest that having a more dominant-appearing face may be associated with lower stress and hence lower cortisol in women, and provide further evidence regarding the information content of the human face.
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Affiliation(s)
- Isaac Gonzalez-Santoyo
- Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
| | - John R Wheatley
- Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
| | - Lisa L M Welling
- Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
| | - Rodrigo A Cárdenas
- Department of Psychology, Pennsylvania State University, University Park, PA 16802, USA
| | - Francisco Jimenez-Trejo
- Laboratorio de Biología de la Reproducción, Instituto Nacional de Pediatría, 04530 Ciudad de México, México D.F., Mexico
| | - Khytam Dawood
- Department of Psychology, Pennsylvania State University, University Park, PA 16802, USA
| | - David A Puts
- Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA.
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216
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Bath E, Wigby S, Vincent C, Tobias JA, Seddon N. Condition, not eyespan, predicts contest outcome in female stalk-eyed flies, Teleopsis dalmanni. Ecol Evol 2015; 5:1826-36. [PMID: 26140199 PMCID: PMC4485964 DOI: 10.1002/ece3.1467] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 02/12/2015] [Accepted: 02/16/2015] [Indexed: 11/06/2022] Open
Abstract
In contests among males, body condition is often the key determinant of a successful outcome, with fighting ability signaled by so-called armaments, that is, exaggerated, condition-dependent traits. However, it is not known whether condition and exaggerated traits function in the same way in females. Here, we manipulated adult condition by varying larval nutrition in the stalk-eyed fly, Teleopsis dalmanni, a species in which eyespan is exaggerated in both sexes, and we measured the outcome of contests between females of similar or different body condition and relative eyespan. We found that females in higher condition, with both larger bodies and eyespan, won a higher proportion of encounters when competing against rivals of lower condition. However, when females were of equal condition, neither eyespan nor body length had an effect on the outcome of a contest. An analysis of previously published data revealed a similar pattern in males: individuals with large relative eyespan did not win significantly more encounters when competing with individuals of a similar body size. Contrary to expectations, and to previous findings in males, there was no clear effect of differences in body size or eyespan affecting contest duration in females. Taken together, our findings suggest that although eyespan can provide an honest indicator of condition, large eyespans provide no additional benefit to either sex in intrasexual aggressive encounters; body size is instead the most important factor.
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Affiliation(s)
- Eleanor Bath
- Department of Zoology, Edward Grey Institute, University of OxfordOxford, OX1 3PS, UK
| | - Stuart Wigby
- Department of Zoology, Edward Grey Institute, University of OxfordOxford, OX1 3PS, UK
| | - Claire Vincent
- Department of Zoology, Edward Grey Institute, University of OxfordOxford, OX1 3PS, UK
| | - Joseph A Tobias
- Department of Zoology, Edward Grey Institute, University of OxfordOxford, OX1 3PS, UK
| | - Nathalie Seddon
- Department of Zoology, Edward Grey Institute, University of OxfordOxford, OX1 3PS, UK
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217
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Yong L, Woodall BE, Pierotti ME, McKinnon JS. Intrasexual competition and throat color evolution in female three-spined sticklebacks. Behav Ecol 2015. [DOI: 10.1093/beheco/arv037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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218
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Dunn PO, Armenta JK, Whittingham LA. Natural and sexual selection act on different axes of variation in avian plumage color. SCIENCE ADVANCES 2015; 1:e1400155. [PMID: 26601146 PMCID: PMC4643820 DOI: 10.1126/sciadv.1400155] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 02/25/2015] [Indexed: 05/14/2023]
Abstract
The bright colors of birds are often attributed to sexual selection on males, but in many species both sexes are colorful and it has been long debated whether sexual selection can also explain this variation. We show that most evolutionary transitions in color have been toward similar plumage in both sexes, and the color of both sexes (for example, bright or dull) was associated with indices of natural selection (for example, habitat type), whereas sexual differences in color were primarily associated with indices of sexual selection on males (for example, polygyny and large testes size). Debate about the evolution of bird coloration can be resolved by recognizing that both natural and sexual selection have been influential, but they have generally acted on two different axes: sexual selection on an axis of sexual differences and natural selection on both sexes for the type of color (for example, bright or dull).
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219
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Hall ML, Rittenbach MRD, Vehrencamp SL. Female song and vocal interactions with males in a neotropical wren. Front Ecol Evol 2015. [DOI: 10.3389/fevo.2015.00012] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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220
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Fitzpatrick CL. Expanding Sexual Selection Gradients; A Synthetic Refinement of Sexual Selection Theory. Ethology 2015. [DOI: 10.1111/eth.12352] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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221
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Odreitz U, Sefc KM. Territorial competition and the evolutionary loss of sexual size dimorphism. Behav Ecol Sociobiol 2015; 69:593-601. [PMID: 25798023 PMCID: PMC4359285 DOI: 10.1007/s00265-014-1870-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 12/29/2014] [Accepted: 12/29/2014] [Indexed: 11/29/2022]
Abstract
Non-sexual social selection can underlie the evolution of sexually monomorphic phenotypes. A causal relationship between territorial competition and sexual monomorphism predicts that male and female competitors should employ similar contest behavior and that contest outcome should depend on the same traits in males and females. We test this prediction in a sexually monomorphic cichlid fish of the genus Tropheus, in which males and females defend individual feeding territories. Lineages basal to Tropheus are sexually dimorphic and have non-territorial females, suggesting that a switch to female territoriality and loss of sexual dimorphism occurred in the Tropheus lineage. We compare rates of agonistic behavior and the effects of body size asymmetries on competitive success between male-male and female-female contests in an experimental setup. Body size asymmetry had the same effect in male and female contests, being negatively correlated with contest duration and positively correlated with the probability of winning. Male and female winners employed the same rates of frontal and lateral displays as well as charges against their opponents. Contest duration was longer in females. In tied contests, females displayed more than males. Our data suggest that intraspecific contest competition for territories selects for large body size in both sexes and support a link between the evolution of female territoriality and the loss of sexual size dimorphism in Tropheus.
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Affiliation(s)
- Ulrike Odreitz
- Institute of Zoology, University of Graz, Universitätsplatz 2, 8010 Graz, Austria
| | - Kristina M. Sefc
- Institute of Zoology, University of Graz, Universitätsplatz 2, 8010 Graz, Austria
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222
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Beck ML, Hopkins WA, Hawley DM. Relationships among plumage coloration, blood selenium concentrations, and immune responses of adult and nestling tree swallows. J Exp Biol 2015; 218:3415-24. [DOI: 10.1242/jeb.123794] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 08/26/2015] [Indexed: 12/18/2022]
Abstract
In a number of taxa, males and females both display ornaments that may be associated with individual quality and could be reliable signals to potential mates or rivals. We examined the iridescent blue/green back and white breast of adult tree swallows (Tachycineta bicolor) to determine if plumage reflectance was related to adult or offspring immune responses. We simultaneously addressed the influence of blood selenium levels and the interaction between blood selenium and plumage coloration on adult and nestling immunity. Selenium is a well-known antioxidant necessary for mounting a robust immune response but its importance in wild birds remains poorly understood. In females, the brightness of white breast coloration was positively associated with bactericidal capacity, but there was no association with blood selenium. In contrast, male bactericidal capacity was associated with an interactive effect between dorsal plumage coloration and blood selenium concentrations. Males with bluer hues and greater blue chroma showed increased bactericidal capacity as blood selenium concentrations increased, while bactericidal capacity declined in greener males at higher blood selenium concentrations. In nestlings, bactericidal capacity was positively associated with nestling blood selenium concentrations and white brightness of both social parents. These results suggest that white plumage reflectance is indicative of quality in tree swallows and that greater attention should be paid to the reflectance of large white plumage patches. Additionally, the role of micronutrients, such as selenium, in mediating relationships between physiology and signals of quality, should be explored further.
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Affiliation(s)
- Michelle L. Beck
- 106 Cheatham Hall, Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, VA 24061-0321, USA
| | - William A. Hopkins
- 106 Cheatham Hall, Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, VA 24061-0321, USA
| | - Dana M. Hawley
- 2125 Derring Hall, Department of Biology, Virginia Tech, Blacksburg, VA 24061-0406, USA
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223
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224
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Vergara P, Fargallo JA, Martínez-Padilla J. Genetic basis and fitness correlates of dynamic carotenoid-based ornamental coloration in male and female common kestrels Falco tinnunculus. J Evol Biol 2014; 28:146-54. [DOI: 10.1111/jeb.12553] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 11/12/2014] [Indexed: 11/28/2022]
Affiliation(s)
- P. Vergara
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid Spain
| | - J. A. Fargallo
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid Spain
| | - J. Martínez-Padilla
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid Spain
- Department of Ethology and Biodiversity Conservation; Estación Biológica de Doñana - CSIC; Sevilla Spain
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225
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Bauer RT, Okuno J, Thiel M. Inferences on mating and sexual systems of two Pacific Cinetorhynchus shrimps (Decapoda, Rhynchocinetidae) based on sexual dimorphism in body size and cheliped weaponry. Zookeys 2014; 457:187-209. [PMID: 25561837 PMCID: PMC4283371 DOI: 10.3897/zookeys.457.6512] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 05/21/2014] [Indexed: 11/22/2022] Open
Abstract
Sexual dimorphism in body size and weaponry was examined in two Cinetorhynchus shrimp species in order to formulate hypotheses on their sexual and mating systems. Collections of Cinetorhynchus sp. A and Cinetorhynchus sp. B were made in March, 2011 on Coconut Island, Hawaii, by hand dipnetting and minnow traps in coral rubble bottom in shallow water. Although there is overlap in male and female size, some males are much larger than females. The major (pereopod 1) chelipeds of males are significantly larger and longer than those of females. In these two Cinetorhynchus species, males and females have third maxillipeds of similar relative size, i.e., those of males are not hypertrophied and probably not used as spear-like weapons as in some other rhynchocinetid (Rhynchocinetes) species. Major chelae of males vary with size, changing from typical female-like chelae tipped with black corneous stout setae to subchelate or prehensile appendages in larger males. Puncture wounds or regenerating major chelipeds were observed in 26.1 % of males examined (N = 38 including both species). We interpret this evidence on sexual dimorphism as an indication of a temporary male mate guarding or "neighborhoods of dominance" mating system, in which larger dominant robustus males defend females and have greater mating success than smaller males. Fecundity of females increased with female size, as in most caridean species (500-800 in Cinetorhynchus sp. A; 300-3800 in Cinetorhynchus sp. B). Based on the sample examined, we conclude that these two species have a gonochoric sexual system (separate sexes) like most but not all other rhynchocinetid species in which the sexual system has been investigated.
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Affiliation(s)
- Raymond T. Bauer
- Department of Biology, University of Louisiana, Lafayette, Louisiana 70504-2451, USA
| | - Junji Okuno
- Coastal Branch of Natural History Museum and Institute, Chiba, 123 Yoshio, Katsuura, Chiba 299-5242, Japan
| | - Martin Thiel
- Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
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226
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Cardoso GC, Leitão AV, Funghi C, Batalha HR, Lopes RJ, Mota PG. Similar preferences for ornamentation in opposite- and same-sex choice experiments. J Evol Biol 2014; 27:2798-806. [DOI: 10.1111/jeb.12542] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 10/23/2014] [Accepted: 10/29/2014] [Indexed: 02/06/2023]
Affiliation(s)
- G. C. Cardoso
- CIBIO-Centro de Investigação em Biodiversidade e Recursos Genéticos; Universidade do Porto; Vairão Portugal
| | - A. V. Leitão
- CIBIO-Centro de Investigação em Biodiversidade e Recursos Genéticos; Universidade do Porto; Vairão Portugal
- Departamento de Ciências da Vida; Universidade de Coimbra; Coimbra Portugal
| | - C. Funghi
- CIBIO-Centro de Investigação em Biodiversidade e Recursos Genéticos; Universidade do Porto; Vairão Portugal
- Departamento de Ciências da Vida; Universidade de Coimbra; Coimbra Portugal
| | - H. R. Batalha
- CIBIO-Centro de Investigação em Biodiversidade e Recursos Genéticos; Universidade do Porto; Vairão Portugal
| | - R. J. Lopes
- CIBIO-Centro de Investigação em Biodiversidade e Recursos Genéticos; Universidade do Porto; Vairão Portugal
| | - P. G. Mota
- CIBIO-Centro de Investigação em Biodiversidade e Recursos Genéticos; Universidade do Porto; Vairão Portugal
- Departamento de Ciências da Vida; Universidade de Coimbra; Coimbra Portugal
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227
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Kraaijeveld K. Reversible Trait Loss: The Genetic Architecture of Female Ornaments. ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS 2014. [DOI: 10.1146/annurev-ecolsys-120213-091550] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The evolution of female ornamentation has been subject to considerable debate. Although originally thought to be by-products of selection on males, recent studies have emphasized the adaptive nature of female ornaments. Here, I review current knowledge on the genetic architecture of ornamental traits and how their expression is (or is not) restricted to one sex. Ornament development typically involves deeply conserved developmental genes. Their expression is modified by pre-existing sexually dimorphic signals, such as hormones in vertebrates or doublesex gene products in insects. Changes in dosage and binding affinities in these systems apparently allow frequent switches between sexually dimorphic and monomorphic ornament expression. However, early-developing ornaments may be difficult to modulate, as this would result in severe pleiotropic effects. Comparative studies on the molecular structure of the sex-specific modulating signals and their receptors should provide detailed insight into the mechanisms underlying the loss and gain of female ornaments.
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Affiliation(s)
- Ken Kraaijeveld
- Department of Ecological Science, Faculty of Earth and Life Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
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228
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Illes AE. Context of female bias in song repertoire size, singing effort, and singing independence in a cooperatively breeding songbird. Behav Ecol Sociobiol 2014. [DOI: 10.1007/s00265-014-1827-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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229
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Jacobs AC, Fair JM, Zuk M. Coloration, Paternity, and Assortative Mating in Western Bluebirds. Ethology 2014. [DOI: 10.1111/eth.12327] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Anne C. Jacobs
- Department of Biology; University of California; Riverside CA USA
| | - Jeanne M. Fair
- Los Alamos National Laboratory; Environmental Stewardship; Los Alamos NM USA
| | - Marlene Zuk
- Department of Ecology, Evolution and Behavior; University of Minnesota; Saint Paul MN USA
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230
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Zhuang JY, Wang JX. Women ornament themselves for intrasexual competition near ovulation, but for intersexual attraction in luteal phase. PLoS One 2014; 9:e106407. [PMID: 25180577 PMCID: PMC4152269 DOI: 10.1371/journal.pone.0106407] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 08/01/2014] [Indexed: 12/03/2022] Open
Abstract
The present study examined women's attentional bias toward ornamental objects in relation to their menstrual phase as well as to motivations of intersexual courtship or intrasexual competition. In Experiment 1, 33 healthy heterosexual women were tested in a bias-assessment visual cuing task twice: once on a high-fertility day (during the ovulatory phase) and once on a low-fertility day (during the luteal phase). They paid greater attention to pictures of ornamental objects than to pictures of non-ornamental objects near ovulation, but not during the luteal phase, suggesting an ornamental bias during the high-fertility phase. In Experiment 2, before the visual cuing task, 40 participants viewed 10 same-sex or opposite-sex facial photographs with either high or low attractiveness as priming tasks to activate the intrasexual competition or intersexual courtship motives. Results showed that women's ornamental bias was dependent on the interaction of menstrual phase and mating motive. Specifically, the ornamental bias was observed on the high-fertility day when the subjects were primed with high-attractive same-sex images (intrasexual competition) and was observed on the low-fertility day when they were primed with high-attractive opposite-sex photographs (intersexual courtship). In conclusion, the present findings confirm the hypothesis that, during the high-fertility phase, women have an attentional bias toward ornamental objects and further support the hypothesis that the ornamental bias is driven by intrasexual competition motivation near ovulation, but driven by intersexual courtship motivation during the luteal phase.
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Affiliation(s)
- Jin-Ying Zhuang
- Key Laboratory of Brain Functional Genomics (MOE & STCSM), School of Psychology and Cognitive Science, East China Normal University, Shanghai, China
- * E-mail:
| | - Jia-Xi Wang
- Key Laboratory of Brain Functional Genomics (MOE & STCSM), School of Psychology and Cognitive Science, East China Normal University, Shanghai, China
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231
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Bespalova I, Helms KR. Social selection and the evolution of a female weapon in queens of the antMessor pergandei(Hymenoptera: Formicidae). Biol J Linn Soc Lond 2014. [DOI: 10.1111/bij.12376] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ioulia Bespalova
- Department of Biology; University of Vermont; Burlington VT 05405 USA
| | - Ken R. Helms
- Department of Biology; University of Vermont; Burlington VT 05405 USA
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232
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Frédérich B, Olivier D, Litsios G, Alfaro ME, Parmentier E. Trait decoupling promotes evolutionary diversification of the trophic and acoustic system of damselfishes. Proc Biol Sci 2014; 281:20141047. [PMID: 24990683 PMCID: PMC4100519 DOI: 10.1098/rspb.2014.1047] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 06/09/2014] [Indexed: 11/12/2022] Open
Abstract
Trait decoupling, wherein evolutionary release of constraints permits specialization of formerly integrated structures, represents a major conceptual framework for interpreting patterns of organismal diversity. However, few empirical tests of this hypothesis exist. A central prediction, that the tempo of morphological evolution and ecological diversification should increase following decoupling events, remains inadequately tested. In damselfishes (Pomacentridae), a ceratomandibular ligament links the hyoid bar and lower jaws, coupling two main morphofunctional units directly involved in both feeding and sound production. Here, we test the decoupling hypothesis by examining the evolutionary consequences of the loss of the ceratomandibular ligament in multiple damselfish lineages. As predicted, we find that rates of morphological evolution of trophic structures increased following the loss of the ligament. However, this increase in evolutionary rate is not associated with an increase in trophic breadth, but rather with morphofunctional specialization for the capture of zooplanktonic prey. Lineages lacking the ceratomandibular ligament also shows different acoustic signals (i.e. higher variation of pulse periods) from others, resulting in an increase of the acoustic diversity across the family. Our results support the idea that trait decoupling can increase morphological and behavioural diversity through increased specialization rather than the generation of novel ecotypes.
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Affiliation(s)
- Bruno Frédérich
- Laboratoire de Morphologie Fonctionnelle et Evolutive, Applied and Fundamental Fish Research Center, Université de Liège, 4000 Liège, Belgium
| | - Damien Olivier
- Laboratoire de Morphologie Fonctionnelle et Evolutive, Applied and Fundamental Fish Research Center, Université de Liège, 4000 Liège, Belgium
| | - Glenn Litsios
- Department of Ecology and Evolution, University of Lausanne, 1015 Lausanne, Switzerland Swiss Institute of Bioinformatics, Génopode, Quartier Sorge, 1015 Lausanne, Switzerland
| | - Michael E Alfaro
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095, USA
| | - Eric Parmentier
- Laboratoire de Morphologie Fonctionnelle et Evolutive, Applied and Fundamental Fish Research Center, Université de Liège, 4000 Liège, Belgium
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233
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Gosden TP, Rundle HD, Chenoweth SF. Testing the correlated response hypothesis for the evolution and maintenance of male mating preferences in Drosophila serrata. J Evol Biol 2014; 27:2106-12. [DOI: 10.1111/jeb.12461] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 07/09/2014] [Accepted: 07/09/2014] [Indexed: 11/29/2022]
Affiliation(s)
- T. P. Gosden
- School of Biological Sciences; The University of Queensland; Brisbane Qld Australia
- Section for Evolutionary Ecology; Department of Biology; Lund University; Lund Sweden
| | - H. D. Rundle
- Department of Biology; University of Ottawa; Ottawa ON Canada
| | - S. F. Chenoweth
- School of Biological Sciences; The University of Queensland; Brisbane Qld Australia
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234
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Lumpkin DC, Murphy TG, Tarvin KA. Blood parasite infection differentially relates to carotenoid-based plumage and bill color in the American goldfinch. Ecol Evol 2014; 4:3210-7. [PMID: 25473474 PMCID: PMC4222208 DOI: 10.1002/ece3.1164] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Revised: 05/27/2014] [Accepted: 06/19/2014] [Indexed: 12/02/2022] Open
Abstract
Male and female American goldfinches (Spinus tristis) express condition-dependent carotenoid-based plumage and bill coloration. Plumage color is relatively static, as pigments incorporated into feathers during the spring molt cannot be mobilized thereafter. In contrast, bill color is dynamic, reflecting changes in condition over short time periods. Previous studies have shown that male and female ornaments, though similar in expression, are differentially related to measures of immunocompetence, suggesting that the relationship between ornamentation and parasite infection may differ between the sexes. In this study, we evaluate the relationship between condition-dependent ornamentation (plumage and bill color) and blood parasite infection in male and female American goldfinches. We captured goldfinches after completion of the pre-alternate molt and prior to the onset of nesting and assessed prevalence of Trypanosoma parasites via blood smears. Plumage color strongly predicted trypanosome infection: Birds with more colorful plumage were less likely to present infections. In contrast, we detected no relationship between infection and bill color, which in other studies has been shown to dynamically reflect current condition. Sex did not affect the relationship between infection status and either ornament. Together, these results suggest that physiological pathways linking carotenoid ornamentation and infection may vary even within a single species.
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Affiliation(s)
| | - Troy G Murphy
- Department of Biology, Trinity University San Antonio, Texas
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235
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Tigreros N, Mowery MA, Lewis SM. Male mate choice favors more colorful females in the gift-giving cabbage butterfly. Behav Ecol Sociobiol 2014. [DOI: 10.1007/s00265-014-1764-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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236
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Cain KE, Rosvall KA. Next steps for understanding the selective relevance of female-female competition. Front Ecol Evol 2014. [DOI: 10.3389/fevo.2014.00032] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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237
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Hughes M, Williamson T, Hollowell K, Vickery R. Sex and Weapons: Contrasting Sexual Dimorphisms in Weaponry and Aggression in Snapping Shrimp. Ethology 2014. [DOI: 10.1111/eth.12270] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Melissa Hughes
- Department of Biology; College of Charleston; Charleston SC USA
| | - Tucker Williamson
- Department of Biology; College of Charleston; Charleston SC USA
- Medical University of South Carolina; Charleston SC USA
| | | | - Rachel Vickery
- Department of Biology; College of Charleston; Charleston SC USA
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238
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Same trait, different receiver response: unlike females, male American goldfinches do not signal status with bill colour. Anim Behav 2014. [DOI: 10.1016/j.anbehav.2014.04.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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239
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Grunst AS, Grunst ML. Multiple sexual pigments, assortative social pairing, and genetic paternity in the yellow warbler (Setophaga petechia). Behav Ecol Sociobiol 2014. [DOI: 10.1007/s00265-014-1752-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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240
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Tibbetts EA. The evolution of honest communication: integrating social and physiological costs of ornamentation. Integr Comp Biol 2014; 54:578-90. [PMID: 24944118 DOI: 10.1093/icb/icu083] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Much research on animal communication has addressed how costs such as social costs or physiological costs favor the accuracy of signals. Previous work has largely considered these costs separately, but we may be missing essential connections by studying costs in isolation. After all, social interactions produce rapid changes in hormone titers which can then affect individual behavior and physiology. As a result, social costs are likely to have widespread physiological consequences. Here, I present a new perspective on the factors that maintain honest signals by describing how the interplay between social costs and physiological costs may maintain an accurate link between an animal's abilities and ornament elaboration. I outline three specific mechanisms by which the interaction between social behavior and hormones could favor honest signals and present specific predictions for each of the three models. Then, I review how ornaments alter agonistic behavior, agonistic behavior influences hormones, and how these hormonal effects influence fitness. I also describe the few previous studies that have directly tested how ornaments influence hormones. Finally, opportunities for future work are discussed. Considering the interaction between social behavior and physiology may address some challenges associated with both social and physiological models of costs. Understanding the dynamic feedbacks between physiology and social costs has potential to transform our understanding of the stability of animals' communication systems.
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241
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Jones MR, Witt CC. Migrate small, sound big: functional constraints on body size promote tracheal elongation in cranes. J Evol Biol 2014; 27:1256-64. [DOI: 10.1111/jeb.12397] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 03/27/2014] [Accepted: 03/31/2014] [Indexed: 11/27/2022]
Affiliation(s)
- M. R. Jones
- Museum of Southwestern Biology and Department of Biology; University of New Mexico; Albuquerque NM USA
| | - C. C. Witt
- Museum of Southwestern Biology and Department of Biology; University of New Mexico; Albuquerque NM USA
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242
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Price JJ, Eaton MD. RECONSTRUCTING THE EVOLUTION OF SEXUAL DICHROMATISM: CURRENT COLOR DIVERSITY DOES NOT REFLECT PAST RATES OF MALE AND FEMALE CHANGE. Evolution 2014; 68:2026-37. [DOI: 10.1111/evo.12417] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Accepted: 03/20/2014] [Indexed: 11/27/2022]
Affiliation(s)
- J. Jordan Price
- Department of Biology; St. Mary's College of Maryland; St. Mary's City Maryland 20686
| | - Muir D. Eaton
- Department of Biology; Drake University; Des Moines Iowa 50311
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243
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Ota K, Awata S, Morita M, Kohda M. Sneaker males are not necessarily similar to females in colour in a sexually monochromatic cichlid. J Zool (1987) 2014. [DOI: 10.1111/jzo.12125] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- K. Ota
- Department of Biology and Geosciences Osaka City University Osaka Japan
| | - S. Awata
- Sado Marine Biological Station Faculty of Science Niigata University Sado Niigata Japan
| | - M. Morita
- Sesoko Station TBRC University of the Ryukyus Motobu Okinawa Japan
| | - M. Kohda
- Department of Biology and Geosciences Osaka City University Osaka Japan
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244
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Female-female competition is influenced by forehead patch expression in pied flycatcher females. Behav Ecol Sociobiol 2014. [DOI: 10.1007/s00265-014-1730-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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245
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Freeman-Gallant CR, Schneider RL, Taff CC, Dunn PO, Whittingham LA. Contrasting patterns of selection on the size and coloration of a female plumage ornament in common yellowthroats. J Evol Biol 2014; 27:982-91. [DOI: 10.1111/jeb.12369] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 03/07/2014] [Accepted: 03/07/2014] [Indexed: 11/27/2022]
Affiliation(s)
| | - R. L. Schneider
- Department of Biology; Skidmore College; Saratoga Springs NY USA
- Behavioral and Molecular Ecology Group; Department of Biological Sciences; University of Wisconsin-Milwaukee; Milwaukee WI USA
| | - C. C. Taff
- Animal Behavior Graduate Group and Department of Evolution and Ecology; University of California-Davis; Davis CA USA
| | - P. O. Dunn
- Behavioral and Molecular Ecology Group; Department of Biological Sciences; University of Wisconsin-Milwaukee; Milwaukee WI USA
| | - L. A. Whittingham
- Behavioral and Molecular Ecology Group; Department of Biological Sciences; University of Wisconsin-Milwaukee; Milwaukee WI USA
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246
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Female song is widespread and ancestral in songbirds. Nat Commun 2014; 5:3379. [DOI: 10.1038/ncomms4379] [Citation(s) in RCA: 251] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 02/04/2014] [Indexed: 11/09/2022] Open
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247
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Eastwood's Brawn and Einstein's Brain: An Evolutionary Account of Dominance, Prestige, and Precarious Manhood. REVIEW OF GENERAL PSYCHOLOGY 2014. [DOI: 10.1037/a0036594] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Researchers have theorized that manhood is a precarious social status that requires effort to achieve. Because of this, men whose manhood is threatened react with a variety of compensatory behaviors and cognitions such as aggression, support for hierarchy, low tolerance for homosexuality, and support for war. In the following article, we argue that the precarious status of manhood is a result of evolutionary propensities and cultural forces. Specifically, men evolved in dominance hierarchies and therefore, display honest signals of strength and vigor to dissuade other men from fighting them. However, men also evolved in large, prestige-based coalitions and compete against each other to display traits that enhance a coalition. These traits can vary from physical prowess and aggression to intelligence and empathy. As culture becomes more pluralistic and modernized, traditional notions of manhood become less important and alternative avenues for achieving status become available.
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248
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Goymann W, Wingfield JC. Male-to-female testosterone ratios, dimorphism, and life history—what does it really tell us? Behav Ecol 2014. [DOI: 10.1093/beheco/aru019] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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249
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Winegard BM, Reynolds T, Baumeister RF, Winegard B, Maner JK. Grief Functions as an Honest Indicator of Commitment. PERSONALITY AND SOCIAL PSYCHOLOGY REVIEW 2014; 18:168-86. [DOI: 10.1177/1088868314521016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Grief is a puzzling phenomenon. It is often costly and prolonged, potentially increasing mortality rates, drug abuse, withdrawal from social life, and susceptibility to illness. These costs cannot be repaid by the deceased and therefore might appear wasted. In the following article, we propose a possible solution. Using the principles of social selection theory, we argue that an important selective pressure behind the human grief response was the social decisions of other humans. We combine this with insights from signaling theory, noting that grief shares many properties with other hard-to-fake social signals. We therefore contend that grief was shaped by selective forces to function as a hard-to-fake signal of (a) a person’s propensity to form strong, non-utilitarian bonds and (b) a person’s current level of commitment to a group or cause. This theory explains many of the costly symptoms of grief and provides a progressive framework for future research.
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250
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Grunst AS, Rotenberry JT, Grunst ML. Age-dependent relationships between multiple sexual pigments and condition in males and females. Behav Ecol 2014. [DOI: 10.1093/beheco/art124] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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