Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?

Abstract Sexual dimorphism has often been recorded in apple snails (Caenogastropoda Ampullariidae), but reports are concentrated in a few species, either invasive or with biocontrol potential, which sugests some taxonomic bias. To find out evolutionary and ecological correlates of sexual dimorphism...

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Main Authors: NICOLÁS E. TAMBURI, MARÍA J. TIECHER, SILVANA BURELA, PABLO R. MARTÍN
Format: Article
Language:English
Published: Academia Brasileira de Ciências 2023-04-01
Series:Anais da Academia Brasileira de Ciências
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000301002&lng=en&tlng=en
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author NICOLÁS E. TAMBURI
MARÍA J. TIECHER
SILVANA BURELA
PABLO R. MARTÍN
author_facet NICOLÁS E. TAMBURI
MARÍA J. TIECHER
SILVANA BURELA
PABLO R. MARTÍN
author_sort NICOLÁS E. TAMBURI
collection DOAJ
description Abstract Sexual dimorphism has often been recorded in apple snails (Caenogastropoda Ampullariidae), but reports are concentrated in a few species, either invasive or with biocontrol potential, which sugests some taxonomic bias. To find out evolutionary and ecological correlates of sexual dimorphism it is necessary to detect and quantify it but also is important to detect its absence. Our aims were to confirm or not the existence of sexual dimorphism in shell shape of Felipponea neritiniformis and Asolene platae, using Pomacea canaliculata as reference and applying the same methodology (landmark-based geometric morphometrics) and statistical power. Significant intersexual differences were only found in P. canaliculata and, in a lesser degree, in F. neritiniformis: males have larger apertures relative to body whorl and more rounded apertural outer edges than females. Female shells are larger in F. neritiniformis and P. canaliculata, but not in A. platae. Using comparable methodologies and statistical power, sexual dimorphism in shell shape is detectable in some apple snails but not in others. Interspecific variation in sexual dimorphism in the Ampullariidae is not only due to taxonomic bias and deserves more research to establish the main patterns and possible causes.
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spelling doaj.art-464d2db2277f4e4fb5f5c7bf12cd9d3e2023-04-18T07:32:37ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902023-04-0195210.1590/0001-3765202320201519Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?NICOLÁS E. TAMBURIhttps://orcid.org/0000-0002-5644-9478MARÍA J. TIECHERhttps://orcid.org/0000-0002-7354-520XSILVANA BURELAhttps://orcid.org/0000-0002-0695-8477PABLO R. MARTÍNhttps://orcid.org/0000-0002-2987-7901Abstract Sexual dimorphism has often been recorded in apple snails (Caenogastropoda Ampullariidae), but reports are concentrated in a few species, either invasive or with biocontrol potential, which sugests some taxonomic bias. To find out evolutionary and ecological correlates of sexual dimorphism it is necessary to detect and quantify it but also is important to detect its absence. Our aims were to confirm or not the existence of sexual dimorphism in shell shape of Felipponea neritiniformis and Asolene platae, using Pomacea canaliculata as reference and applying the same methodology (landmark-based geometric morphometrics) and statistical power. Significant intersexual differences were only found in P. canaliculata and, in a lesser degree, in F. neritiniformis: males have larger apertures relative to body whorl and more rounded apertural outer edges than females. Female shells are larger in F. neritiniformis and P. canaliculata, but not in A. platae. Using comparable methodologies and statistical power, sexual dimorphism in shell shape is detectable in some apple snails but not in others. Interspecific variation in sexual dimorphism in the Ampullariidae is not only due to taxonomic bias and deserves more research to establish the main patterns and possible causes.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000301002&lng=en&tlng=enAmpullariidaegeometric morphometricsMarisaAsoleneFelipponea
spellingShingle NICOLÁS E. TAMBURI
MARÍA J. TIECHER
SILVANA BURELA
PABLO R. MARTÍN
Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?
Anais da Academia Brasileira de Ciências
Ampullariidae
geometric morphometrics
Marisa
Asolene
Felipponea
title Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?
title_full Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?
title_fullStr Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?
title_full_unstemmed Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?
title_short Sexual dimorphism in shell shape: is Pomacea canaliculata an exception or an example among Neotropical apple snails?
title_sort sexual dimorphism in shell shape is pomacea canaliculata an exception or an example among neotropical apple snails
topic Ampullariidae
geometric morphometrics
Marisa
Asolene
Felipponea
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000301002&lng=en&tlng=en
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AT silvanaburela sexualdimorphisminshellshapeispomaceacanaliculataanexceptionoranexampleamongneotropicalapplesnails
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