Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico

BACKGROUND: Body size exerts a strong influence on the physiology, morphology, ecology, and evolution of other life history traits in vertebrates. We compared the morphometry and allometry of two lizard species (Anolis nebulosus and Aspidoscelis lineattissima) occurring on mainland and island popula...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Hernández-Salinas,Uriel, Ramírez-Bautista,Aurelio, Pavón,Numa P, Rosas Pacheco,Luis F
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2014
Materias:	Allometry Anolis nebulosus Aspidoscelis lineattissima Islands Evolution Sexual dimorphism
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100018
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0716-078X2014000100018
record_format	dspace
spelling	oai:scielo:S0716-078X20140001000182015-07-23Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of MexicoHernández-Salinas,UrielRamírez-Bautista,AurelioPavón,Numa PRosas Pacheco,Luis F Allometry Anolis nebulosus Aspidoscelis lineattissima Islands Evolution Sexual dimorphism BACKGROUND: Body size exerts a strong influence on the physiology, morphology, ecology, and evolution of other life history traits in vertebrates. We compared the morphometry and allometry of two lizard species (Anolis nebulosus and Aspidoscelis lineattissima) occurring on mainland and island populations on the Pacific Coast of Mexico in order to understand the effect of an insular environment on body size and other morphometric structures. RESULTS: Results showed that both males and females of A. nebulosus from San Pancho Island were larger in body size than those from the mainland. Moreover, males of A. lineattissima from Cocinas Island exhibited larger forms of most measured morphometric traits than those from the mainland, whereas females from both island and mainland populations did not differ in body size or in other morphometric traits analyzed. Multivariate allometric coefficients of males and females of A. nebulosus from island and mainland populations showed a lower percentage of positive allometries than in A. lineattissima, probably because the former species is highly sedentary. Island populations of both species exhibit male-biased sexual dimorphisms in body size and size-adjusted morphometric traits. In contrast to the mainland population, morphometric comparisons of body size-adjusted traits showed that male A. lineattissima were larger than females only in head length, head width, forearm length, and tibia length, whereas in A. nebulosus, sexual dimorphism was observed just in HL. CONCLUSIONS: This study supports the hypothesis (island rule) that vertebrates on islands are larger than those of conspecifics on the mainland. In addition, sexual dimorphism observed between males and females of both species and populations could be associated with allometric growth (positive or negative) from some morphometric structures, as well as differences in the growth rates of these organisms.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.87 20142014-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100018en10.1186/S40693-014-0021-3
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Allometry Anolis nebulosus Aspidoscelis lineattissima Islands Evolution Sexual dimorphism
spellingShingle	Allometry Anolis nebulosus Aspidoscelis lineattissima Islands Evolution Sexual dimorphism Hernández-Salinas,Uriel Ramírez-Bautista,Aurelio Pavón,Numa P Rosas Pacheco,Luis F Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico
description	BACKGROUND: Body size exerts a strong influence on the physiology, morphology, ecology, and evolution of other life history traits in vertebrates. We compared the morphometry and allometry of two lizard species (Anolis nebulosus and Aspidoscelis lineattissima) occurring on mainland and island populations on the Pacific Coast of Mexico in order to understand the effect of an insular environment on body size and other morphometric structures. RESULTS: Results showed that both males and females of A. nebulosus from San Pancho Island were larger in body size than those from the mainland. Moreover, males of A. lineattissima from Cocinas Island exhibited larger forms of most measured morphometric traits than those from the mainland, whereas females from both island and mainland populations did not differ in body size or in other morphometric traits analyzed. Multivariate allometric coefficients of males and females of A. nebulosus from island and mainland populations showed a lower percentage of positive allometries than in A. lineattissima, probably because the former species is highly sedentary. Island populations of both species exhibit male-biased sexual dimorphisms in body size and size-adjusted morphometric traits. In contrast to the mainland population, morphometric comparisons of body size-adjusted traits showed that male A. lineattissima were larger than females only in head length, head width, forearm length, and tibia length, whereas in A. nebulosus, sexual dimorphism was observed just in HL. CONCLUSIONS: This study supports the hypothesis (island rule) that vertebrates on islands are larger than those of conspecifics on the mainland. In addition, sexual dimorphism observed between males and females of both species and populations could be associated with allometric growth (positive or negative) from some morphometric structures, as well as differences in the growth rates of these organisms.
author	Hernández-Salinas,Uriel Ramírez-Bautista,Aurelio Pavón,Numa P Rosas Pacheco,Luis F
author_facet	Hernández-Salinas,Uriel Ramírez-Bautista,Aurelio Pavón,Numa P Rosas Pacheco,Luis F
author_sort	Hernández-Salinas,Uriel
title	Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico
title_short	Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico
title_full	Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico
title_fullStr	Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico
title_full_unstemmed	Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico
title_sort	morphometric variation in island and mainland populations of two lizard species from the pacific coast of mexico
publisher	Sociedad de Biología de Chile
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100018
work_keys_str_mv	AT hernandezsalinasuriel morphometricvariationinislandandmainlandpopulationsoftwolizardspeciesfromthepacificcoastofmexico AT ramirezbautistaaurelio morphometricvariationinislandandmainlandpopulationsoftwolizardspeciesfromthepacificcoastofmexico AT pavonnumap morphometricvariationinislandandmainlandpopulationsoftwolizardspeciesfromthepacificcoastofmexico AT rosaspachecoluisf morphometricvariationinislandandmainlandpopulationsoftwolizardspeciesfromthepacificcoastofmexico
_version_	1718439693572374528

Morphometric variation in island and mainland populations of two lizard species from the Pacific Coast of Mexico

Ejemplares similares