Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude

SUMMARY: Vertebrates exhibit structural changes in their cardiovascular and gas exchange systems in response to hypoxic conditions in high altitude environments. In highland neotenic mole salamanders, as other amphibians, the majority of gases exchange is carried out for skin and gills. But, in high...

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Autores principales:	Arredondo,Jorge, González-Morales,Juan C., Rodríguez-Antolín,Jorge, Bastiaans,Elizabeth, Monroy-Vilchis,Octavio, Manjarrez,Javier, Fajardo,Victor
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2017
Materias:	High altitude Histology Critical endangered Ambystoma rivulare Ambystoma leorae
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000401590
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spelling	oai:scielo:S0717-950220170004015902019-09-16Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High AltitudeArredondo,JorgeGonzález-Morales,Juan C.Rodríguez-Antolín,JorgeBastiaans,ElizabethMonroy-Vilchis,OctavioManjarrez,JavierFajardo,Victor High altitude Histology Critical endangered Ambystoma rivulare Ambystoma leorae SUMMARY: Vertebrates exhibit structural changes in their cardiovascular and gas exchange systems in response to hypoxic conditions in high altitude environments. In highland neotenic mole salamanders, as other amphibians, the majority of gases exchange is carried out for skin and gills. But, in high altitude environments, the available oxygen is lower than it is in the air thus, the scarcity of oxygen limits the survival of organisms. Many studies on this subject have focused on understanding the hematological mechanisms that amphibians exhibit in response to hypoxia. However, little is known about possible morphological changes in respiratory structures that may permit increased gas exchange during respiration in high altitude amphibians like Ambystoma leorae and A. rivulare, two threatened Mexican salamander species. The aim of the present study was to describe and compare the histological characteristics of the gills and dorsal skin of A. leorae and A. rivulare from populations at low and high altitudes. We found that, in comparison to lowland organisms, highland ones exhibited more pronounced skin folds, greater numbers of secondary branches in the gills, thinner dorsal and gill epidermises, and greater quantity of melanin surrounding the gill blood vessels. These differences permit a greater capacity for gas exchange and also increase thermoregulatory capacity in high altitude environments.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.35 n.4 20172017-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000401590en10.4067/S0717-95022017000401590
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	High altitude Histology Critical endangered Ambystoma rivulare Ambystoma leorae
spellingShingle	High altitude Histology Critical endangered Ambystoma rivulare Ambystoma leorae Arredondo,Jorge González-Morales,Juan C. Rodríguez-Antolín,Jorge Bastiaans,Elizabeth Monroy-Vilchis,Octavio Manjarrez,Javier Fajardo,Victor Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude
description	SUMMARY: Vertebrates exhibit structural changes in their cardiovascular and gas exchange systems in response to hypoxic conditions in high altitude environments. In highland neotenic mole salamanders, as other amphibians, the majority of gases exchange is carried out for skin and gills. But, in high altitude environments, the available oxygen is lower than it is in the air thus, the scarcity of oxygen limits the survival of organisms. Many studies on this subject have focused on understanding the hematological mechanisms that amphibians exhibit in response to hypoxia. However, little is known about possible morphological changes in respiratory structures that may permit increased gas exchange during respiration in high altitude amphibians like Ambystoma leorae and A. rivulare, two threatened Mexican salamander species. The aim of the present study was to describe and compare the histological characteristics of the gills and dorsal skin of A. leorae and A. rivulare from populations at low and high altitudes. We found that, in comparison to lowland organisms, highland ones exhibited more pronounced skin folds, greater numbers of secondary branches in the gills, thinner dorsal and gill epidermises, and greater quantity of melanin surrounding the gill blood vessels. These differences permit a greater capacity for gas exchange and also increase thermoregulatory capacity in high altitude environments.
author	Arredondo,Jorge González-Morales,Juan C. Rodríguez-Antolín,Jorge Bastiaans,Elizabeth Monroy-Vilchis,Octavio Manjarrez,Javier Fajardo,Victor
author_facet	Arredondo,Jorge González-Morales,Juan C. Rodríguez-Antolín,Jorge Bastiaans,Elizabeth Monroy-Vilchis,Octavio Manjarrez,Javier Fajardo,Victor
author_sort	Arredondo,Jorge
title	Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude
title_short	Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude
title_full	Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude
title_fullStr	Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude
title_full_unstemmed	Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude
title_sort	histological characteristics of gills and dorsal skin in ambystoma leorae and ambystoma rivulare : morphological changes for living at high altitude
publisher	Sociedad Chilena de Anatomía
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000401590
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Histological Characteristics of Gills and Dorsal Skin in Ambystoma leorae and Ambystoma rivulare : Morphological Changes for Living at High Altitude

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