Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.biomedcentral.com/1471-2148/14/251 http://hdl.handle.net/11449/130007 |
Resumo: | Background: Phenotypic diversity among populations may result from divergent natural selection acting directly on traits or via correlated responses to changes in other traits. One of the most frequent patterns of correlated response is the proportional change in the dimensions of anatomical traits associated with changes in growth or absolute size, known as allometry. Livebearing fishes subject to predation gradients have been shown to repeatedly evolve larger caudal peduncles and smaller cranial regions under high predation regimes. Poecilia vivipara is a livebearing fish commonly found in coastal lagoons in the north of the state of Rio de Janeiro, Brazil. Similar to what is observed in other predation gradients, lagoons inhabited by P. vivipara vary in the presence of piscivorous fishes; contrary to other poeciliid systems, populations of P. vivipara vary greatly in body size, which opens the possibility of strong allometric effects on shape variation. Here we investigated body shape diversification among six populations of P. vivipara along a predation gradient and its relationship with allometric trajectories within and among populations.Results: We found substantial body size variation and correlated shape changes among populations. Multivariate regression analysis showed that size variation among populations accounted for 66% of shape variation in females and 38% in males, suggesting that size is the most important dimension underlying shape variation among populations of P. vivipara in this system. Changes in the relative sizes of the caudal peduncle and cranial regions were only partly in line with predictions from divergent natural selection associated with predation regime.Conclusions: Our results suggest the possibility that adaptive shape variation among populations has been partly constrained by allometry in P. vivipara. Processes governing body size changes are therefore important in the diversification of this species. We conclude that in species characterized by substantial among-population differences in body size, ignoring allometric effects when investigating divergent natural selection's role in phenotypic diversification might not be warranted. |
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Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predationDivergent natural selectionEcological gradientsHoplias malabaricusMorphometricsPoeciliidaeBackground: Phenotypic diversity among populations may result from divergent natural selection acting directly on traits or via correlated responses to changes in other traits. One of the most frequent patterns of correlated response is the proportional change in the dimensions of anatomical traits associated with changes in growth or absolute size, known as allometry. Livebearing fishes subject to predation gradients have been shown to repeatedly evolve larger caudal peduncles and smaller cranial regions under high predation regimes. Poecilia vivipara is a livebearing fish commonly found in coastal lagoons in the north of the state of Rio de Janeiro, Brazil. Similar to what is observed in other predation gradients, lagoons inhabited by P. vivipara vary in the presence of piscivorous fishes; contrary to other poeciliid systems, populations of P. vivipara vary greatly in body size, which opens the possibility of strong allometric effects on shape variation. Here we investigated body shape diversification among six populations of P. vivipara along a predation gradient and its relationship with allometric trajectories within and among populations.Results: We found substantial body size variation and correlated shape changes among populations. Multivariate regression analysis showed that size variation among populations accounted for 66% of shape variation in females and 38% in males, suggesting that size is the most important dimension underlying shape variation among populations of P. vivipara in this system. Changes in the relative sizes of the caudal peduncle and cranial regions were only partly in line with predictions from divergent natural selection associated with predation regime.Conclusions: Our results suggest the possibility that adaptive shape variation among populations has been partly constrained by allometry in P. vivipara. Processes governing body size changes are therefore important in the diversification of this species. We conclude that in species characterized by substantial among-population differences in body size, ignoring allometric effects when investigating divergent natural selection's role in phenotypic diversification might not be warranted.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Dept Ecol, Rio Claro, SP, BrazilUniv Nacl La Plata, CONICET, Div Antropol, Fac Ciencias Nat &Museo, La Plata, Buenos Aires, ArgentinaUniv Fed Rio de Janeiro, Nucleo Ecol &Desenvolvimento Socioambiental Maca, Macae, RJ, BrazilUniv Estadual Paulista, Dept Ecol, Rio Claro, SP, BrazilFAPESP: 2010/15567-8CNPq: PELD Site-5 558270/2009-3Biomed Central LtdUniversidade Estadual Paulista (Unesp)Univ Nacl La PlataUniversidade Federal do Rio de Janeiro (UFRJ)Araujo, Marcio S. [UNESP]Ivan Perez, S.Magazoni, Maria Julia C. [UNESP]Petry, Ana C.2015-11-03T15:28:33Z2015-11-03T15:28:33Z2014-12-04info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-11application/pdfhttp://www.biomedcentral.com/1471-2148/14/251Bmc Evolutionary Biology. London: Biomed Central Ltd, v. 14, 11 p., 2014.1471-2148http://hdl.handle.net/11449/13000710.1186/s12862-014-0251-7WOS:000347197100001WOS000347197100001.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBmc Evolutionary Biology3.0271,656info:eu-repo/semantics/openAccess2023-10-07T06:02:28Zoai:repositorio.unesp.br:11449/130007Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:12:14.125303Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation |
title |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation |
spellingShingle |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation Araujo, Marcio S. [UNESP] Divergent natural selection Ecological gradients Hoplias malabaricus Morphometrics Poeciliidae |
title_short |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation |
title_full |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation |
title_fullStr |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation |
title_full_unstemmed |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation |
title_sort |
Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation |
author |
Araujo, Marcio S. [UNESP] |
author_facet |
Araujo, Marcio S. [UNESP] Ivan Perez, S. Magazoni, Maria Julia C. [UNESP] Petry, Ana C. |
author_role |
author |
author2 |
Ivan Perez, S. Magazoni, Maria Julia C. [UNESP] Petry, Ana C. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Univ Nacl La Plata Universidade Federal do Rio de Janeiro (UFRJ) |
dc.contributor.author.fl_str_mv |
Araujo, Marcio S. [UNESP] Ivan Perez, S. Magazoni, Maria Julia C. [UNESP] Petry, Ana C. |
dc.subject.por.fl_str_mv |
Divergent natural selection Ecological gradients Hoplias malabaricus Morphometrics Poeciliidae |
topic |
Divergent natural selection Ecological gradients Hoplias malabaricus Morphometrics Poeciliidae |
description |
Background: Phenotypic diversity among populations may result from divergent natural selection acting directly on traits or via correlated responses to changes in other traits. One of the most frequent patterns of correlated response is the proportional change in the dimensions of anatomical traits associated with changes in growth or absolute size, known as allometry. Livebearing fishes subject to predation gradients have been shown to repeatedly evolve larger caudal peduncles and smaller cranial regions under high predation regimes. Poecilia vivipara is a livebearing fish commonly found in coastal lagoons in the north of the state of Rio de Janeiro, Brazil. Similar to what is observed in other predation gradients, lagoons inhabited by P. vivipara vary in the presence of piscivorous fishes; contrary to other poeciliid systems, populations of P. vivipara vary greatly in body size, which opens the possibility of strong allometric effects on shape variation. Here we investigated body shape diversification among six populations of P. vivipara along a predation gradient and its relationship with allometric trajectories within and among populations.Results: We found substantial body size variation and correlated shape changes among populations. Multivariate regression analysis showed that size variation among populations accounted for 66% of shape variation in females and 38% in males, suggesting that size is the most important dimension underlying shape variation among populations of P. vivipara in this system. Changes in the relative sizes of the caudal peduncle and cranial regions were only partly in line with predictions from divergent natural selection associated with predation regime.Conclusions: Our results suggest the possibility that adaptive shape variation among populations has been partly constrained by allometry in P. vivipara. Processes governing body size changes are therefore important in the diversification of this species. We conclude that in species characterized by substantial among-population differences in body size, ignoring allometric effects when investigating divergent natural selection's role in phenotypic diversification might not be warranted. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-12-04 2015-11-03T15:28:33Z 2015-11-03T15:28:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.biomedcentral.com/1471-2148/14/251 Bmc Evolutionary Biology. London: Biomed Central Ltd, v. 14, 11 p., 2014. 1471-2148 http://hdl.handle.net/11449/130007 10.1186/s12862-014-0251-7 WOS:000347197100001 WOS000347197100001.pdf |
url |
http://www.biomedcentral.com/1471-2148/14/251 http://hdl.handle.net/11449/130007 |
identifier_str_mv |
Bmc Evolutionary Biology. London: Biomed Central Ltd, v. 14, 11 p., 2014. 1471-2148 10.1186/s12862-014-0251-7 WOS:000347197100001 WOS000347197100001.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Bmc Evolutionary Biology 3.027 1,656 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-11 application/pdf |
dc.publisher.none.fl_str_mv |
Biomed Central Ltd |
publisher.none.fl_str_mv |
Biomed Central Ltd |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808128331982307328 |