Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic

Species of the family Pinnotheridae constitute an ideal group for morphometric studies due to their complex morphological adaptations. These adaptations respond to the selective pressure of a symbiotic life style. This study describes the relative growth and morphometric features of the symbiotic pe...

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Autores principales:	Fernando Peiró,Douglas, Pezzuto,Paulo Ricardo, Mantelatto,Fernando Luis
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2011
Materias:	pinnotherid crabs traditional morphometry size-at-maturity sexual dimorphism southwestern Atlantic
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200007
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spelling	oai:scielo:S0718-560X20110002000072011-07-26Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern AtlanticFernando Peiró,DouglasPezzuto,Paulo RicardoMantelatto,Fernando Luis pinnotherid crabs traditional morphometry size-at-maturity sexual dimorphism southwestern Atlantic Species of the family Pinnotheridae constitute an ideal group for morphometric studies due to their complex morphological adaptations. These adaptations respond to the selective pressure of a symbiotic life style. This study describes the relative growth and morphometric features of the symbiotic pea crab Austinixa aidae (associated with the ghost shrimp Callichirus major), from the sandy beaches in the southwest Atlantic, Brazil. Significant differences were detected in the biometric proportions, particularly the chelar propodus length and carapace width, of each sex. These dimensions were also related to the size at which the individuals reached morphological sexual maturity (5.1 mm of carapace width for both sexes). Males and females were 2.4 times wider than long, which corresponds to the principal adaptation developed by Austinixa species to live in cryptic environments. Moreover, juveniles were proportionally more rounded. The changes in the biometric proportions of carapace length and width of A. aidae were more pronounced in males and females, adaptations that facilitate roaming within the galleries of their hosts.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.39 n.2 20112011-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200007en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	pinnotherid crabs traditional morphometry size-at-maturity sexual dimorphism southwestern Atlantic
spellingShingle	pinnotherid crabs traditional morphometry size-at-maturity sexual dimorphism southwestern Atlantic Fernando Peiró,Douglas Pezzuto,Paulo Ricardo Mantelatto,Fernando Luis Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic
description	Species of the family Pinnotheridae constitute an ideal group for morphometric studies due to their complex morphological adaptations. These adaptations respond to the selective pressure of a symbiotic life style. This study describes the relative growth and morphometric features of the symbiotic pea crab Austinixa aidae (associated with the ghost shrimp Callichirus major), from the sandy beaches in the southwest Atlantic, Brazil. Significant differences were detected in the biometric proportions, particularly the chelar propodus length and carapace width, of each sex. These dimensions were also related to the size at which the individuals reached morphological sexual maturity (5.1 mm of carapace width for both sexes). Males and females were 2.4 times wider than long, which corresponds to the principal adaptation developed by Austinixa species to live in cryptic environments. Moreover, juveniles were proportionally more rounded. The changes in the biometric proportions of carapace length and width of A. aidae were more pronounced in males and females, adaptations that facilitate roaming within the galleries of their hosts.
author	Fernando Peiró,Douglas Pezzuto,Paulo Ricardo Mantelatto,Fernando Luis
author_facet	Fernando Peiró,Douglas Pezzuto,Paulo Ricardo Mantelatto,Fernando Luis
author_sort	Fernando Peiró,Douglas
title	Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic
title_short	Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic
title_full	Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic
title_fullStr	Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic
title_full_unstemmed	Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic
title_sort	relative growth and sexual dimorphism of austinixa aidae (brachyura: pinnotheridae): a symbiont of the ghost shrimp callichirus major from the southwestern atlantic
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200007
work_keys_str_mv	AT fernandopeirodouglas relativegrowthandsexualdimorphismofaustinixaaidaebrachyurapinnotheridaeasymbiontoftheghostshrimpcallichirusmajorfromthesouthwesternatlantic AT pezzutopauloricardo relativegrowthandsexualdimorphismofaustinixaaidaebrachyurapinnotheridaeasymbiontoftheghostshrimpcallichirusmajorfromthesouthwesternatlantic AT mantelattofernandoluis relativegrowthandsexualdimorphismofaustinixaaidaebrachyurapinnotheridaeasymbiontoftheghostshrimpcallichirusmajorfromthesouthwesternatlantic
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Relative growth and sexual dimorphism of Austinixa aidae (Brachyura: Pinnotheridae): a symbiont of the ghost shrimp Callichirus major from the southwestern Atlantic

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