Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile

Microlophus is a lizard genus of South-America which has many species with sexual size dimorphism. An ecological study was performed on M. atacamensis, a species inhabiting the intertidal zone of the coast of northern Chile. The following questions were addressed: (1) does M. atacamensis exhibit sex...

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Autores principales:	VIDAL,MARCELA, ORTIZ,JUAN CARLOS, LABRA,ANTONIETA
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2002
Materias:	Tropiduridae Microlophus atacamensis sexual dimorphism thermoregulation spatial segregation Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200002
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spelling	oai:scielo:S0716-078X20020002000022003-05-12Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern ChileVIDAL,MARCELAORTIZ,JUAN CARLOSLABRA,ANTONIETA Tropiduridae Microlophus atacamensis sexual dimorphism thermoregulation spatial segregation Chile Microlophus is a lizard genus of South-America which has many species with sexual size dimorphism. An ecological study was performed on M. atacamensis, a species inhabiting the intertidal zone of the coast of northern Chile. The following questions were addressed: (1) does M. atacamensis exhibit sexual dimorphism? (2) do individuals of different age and sex segregate spatially? (3) do individuals of different age and sex use different type of microhabitat? and (4) do individuals of different sexes exhibit differences in thermoregulatory characteristics? The study was conducted in different localities from northern Chile, which include two types of rocky systems used by this species, a high and a low type. At the moment of lizard capture, type of microhabitat, height of perch, body, air and substrate temperatures, were recorded. Individuals were then measured and weighted, and separated by age class and sex. Results indicate that this species exhibits sexual dimorphism, males being larger. There were no intersexual differences in microhabitat used and height of perch in the high type system, although adults and subadults were spatially segregated from juveniles. In the low type system adult females shared microhabitat with juveniles, a probable consequence of behaviors related to the burying of eggs. There were no differences between sexes in thermal characteristics, and body temperature of lizards showed independence from external thermal conditionsinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.75 n.2 20022002-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200002en10.4067/S0716-078X2002000200002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Tropiduridae Microlophus atacamensis sexual dimorphism thermoregulation spatial segregation Chile
spellingShingle	Tropiduridae Microlophus atacamensis sexual dimorphism thermoregulation spatial segregation Chile VIDAL,MARCELA ORTIZ,JUAN CARLOS LABRA,ANTONIETA Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile
description	Microlophus is a lizard genus of South-America which has many species with sexual size dimorphism. An ecological study was performed on M. atacamensis, a species inhabiting the intertidal zone of the coast of northern Chile. The following questions were addressed: (1) does M. atacamensis exhibit sexual dimorphism? (2) do individuals of different age and sex segregate spatially? (3) do individuals of different age and sex use different type of microhabitat? and (4) do individuals of different sexes exhibit differences in thermoregulatory characteristics? The study was conducted in different localities from northern Chile, which include two types of rocky systems used by this species, a high and a low type. At the moment of lizard capture, type of microhabitat, height of perch, body, air and substrate temperatures, were recorded. Individuals were then measured and weighted, and separated by age class and sex. Results indicate that this species exhibits sexual dimorphism, males being larger. There were no intersexual differences in microhabitat used and height of perch in the high type system, although adults and subadults were spatially segregated from juveniles. In the low type system adult females shared microhabitat with juveniles, a probable consequence of behaviors related to the burying of eggs. There were no differences between sexes in thermal characteristics, and body temperature of lizards showed independence from external thermal conditions
author	VIDAL,MARCELA ORTIZ,JUAN CARLOS LABRA,ANTONIETA
author_facet	VIDAL,MARCELA ORTIZ,JUAN CARLOS LABRA,ANTONIETA
author_sort	VIDAL,MARCELA
title	Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile
title_short	Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile
title_full	Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile
title_fullStr	Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile
title_full_unstemmed	Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile
title_sort	sexual and age differences in ecological variables of the lizard microlophus atacamensis (tropiduridae) from northern chile
publisher	Sociedad de Biología de Chile
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200002
work_keys_str_mv	AT vidalmarcela sexualandagedifferencesinecologicalvariablesofthelizardmicrolophusatacamensistropiduridaefromnorthernchile AT ortizjuancarlos sexualandagedifferencesinecologicalvariablesofthelizardmicrolophusatacamensistropiduridaefromnorthernchile AT labraantonieta sexualandagedifferencesinecologicalvariablesofthelizardmicrolophusatacamensistropiduridaefromnorthernchile
_version_	1718439525966938112

Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile

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