Morphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans
The introduction of species into new ecosystems, especially in small and isolated regions such as islands, offers an excellent opportunity to answer questions of the evolutionary processes occurring in natural conditions on a scale that could never be achieved in laboratory conditions. In this study, we examined the Mexican red rump tarantula Brachypelma vagans Ausserer (Mygalomorphae: Theraphosidae), a species that was introduced to Cozumel Island, Mexico, 40 years ago. This introduction provides an exceptional model to study effects such as morphological variation between island populations and those on the mainland in open habitats facing the island. Intraspecific variation related to the color polymorphism was compared. The aim of this study was to determine the phenotypic differences between continental populations of B. vagans and the introduced population on Cozumel Island. Phenotypic difference was evaluated using two approaches: 1) comparison of the morphometric measurements of adult and juvenile individuals at the local scale and between continental and island populations, and 2) comparison of individual color polymorphism between mainland and island populations. Two locations were sampled within the continental part of the Yucatan peninsula and two on the island of Cozumel. The number of samples analyzed at each site was 30 individuals. The morphometric results showed significant differences between continental and island populations, with bigger individuals on the island. In addition, three new variations of the typical color pattern of B. vagans recorded so far were observed. This study opens the door to further investigations to elucidate the origin of the phenotypic variation of the isolated individuals on Cozumel Island. Also, the widest range of color morphs found for a tarantula species is reported.
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Format: | Texto biblioteca |
Language: | eng |
Subjects: | Brachypelma vagans, Arañas, Variación morfológica, Variación fenotípica, Artfrosur, |
Online Access: | http://insectscience.org/13.95/i1536-2442-13-95.pdf |
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Brachypelma vagans Arañas Variación morfológica Variación fenotípica Artfrosur Brachypelma vagans Arañas Variación morfológica Variación fenotípica Artfrosur |
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Brachypelma vagans Arañas Variación morfológica Variación fenotípica Artfrosur Brachypelma vagans Arañas Variación morfológica Variación fenotípica Artfrosur Vilchis Nestor, Claudia Andrea Doctora autor/a 12887 Machkour M'Rabet, Salima Doctora autor/a 12330 Barriga Sosa, Irene de los Ángeles autor/a 14672 Winterton, Peter autor/a 15009 Hénaut, Yann Doctor autor/a 2087 Morphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans |
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The introduction of species into new ecosystems, especially in small and isolated regions such as islands, offers an excellent opportunity to answer questions of the evolutionary processes occurring in natural conditions on a scale that could never be achieved in laboratory conditions. In this study, we examined the Mexican red rump tarantula Brachypelma vagans Ausserer (Mygalomorphae: Theraphosidae), a species that was introduced to Cozumel Island, Mexico, 40 years ago. This introduction provides an exceptional model to study effects such as morphological variation between island populations and those on the mainland in open habitats facing the island. Intraspecific variation related to the color polymorphism was compared. The aim of this study was to determine the phenotypic differences between continental populations of B. vagans and the introduced population on Cozumel Island. Phenotypic difference was evaluated using two approaches: 1) comparison of the morphometric measurements of adult and juvenile individuals at the local scale and between continental and island populations, and 2) comparison of individual color polymorphism between mainland and island populations. Two locations were sampled within the continental part of the Yucatan peninsula and two on the island of Cozumel. The number of samples analyzed at each site was 30 individuals. The morphometric results showed significant differences between continental and island populations, with bigger individuals on the island. In addition, three new variations of the typical color pattern of B. vagans recorded so far were observed. This study opens the door to further investigations to elucidate the origin of the phenotypic variation of the isolated individuals on Cozumel Island. Also, the widest range of color morphs found for a tarantula species is reported. |
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Brachypelma vagans Arañas Variación morfológica Variación fenotípica Artfrosur |
author |
Vilchis Nestor, Claudia Andrea Doctora autor/a 12887 Machkour M'Rabet, Salima Doctora autor/a 12330 Barriga Sosa, Irene de los Ángeles autor/a 14672 Winterton, Peter autor/a 15009 Hénaut, Yann Doctor autor/a 2087 |
author_facet |
Vilchis Nestor, Claudia Andrea Doctora autor/a 12887 Machkour M'Rabet, Salima Doctora autor/a 12330 Barriga Sosa, Irene de los Ángeles autor/a 14672 Winterton, Peter autor/a 15009 Hénaut, Yann Doctor autor/a 2087 |
author_sort |
Vilchis Nestor, Claudia Andrea Doctora autor/a 12887 |
title |
Morphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans |
title_short |
Morphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans |
title_full |
Morphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans |
title_fullStr |
Morphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans |
title_full_unstemmed |
Morphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans |
title_sort |
morphological and color differences between island and mainland populations in the mexican red rump tarantula, brachypelma vagans |
url |
http://insectscience.org/13.95/i1536-2442-13-95.pdf |
work_keys_str_mv |
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1806027743143395328 |
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KOHA-OAI-ECOSUR:372872024-05-22T11:27:28ZMorphological and color differences between island and mainland populations in the Mexican red rump tarantula, Brachypelma vagans Vilchis Nestor, Claudia Andrea Doctora autor/a 12887 Machkour M'Rabet, Salima Doctora autor/a 12330 Barriga Sosa, Irene de los Ángeles autor/a 14672 Winterton, Peter autor/a 15009 Hénaut, Yann Doctor autor/a 2087 textengThe introduction of species into new ecosystems, especially in small and isolated regions such as islands, offers an excellent opportunity to answer questions of the evolutionary processes occurring in natural conditions on a scale that could never be achieved in laboratory conditions. In this study, we examined the Mexican red rump tarantula Brachypelma vagans Ausserer (Mygalomorphae: Theraphosidae), a species that was introduced to Cozumel Island, Mexico, 40 years ago. This introduction provides an exceptional model to study effects such as morphological variation between island populations and those on the mainland in open habitats facing the island. Intraspecific variation related to the color polymorphism was compared. The aim of this study was to determine the phenotypic differences between continental populations of B. vagans and the introduced population on Cozumel Island. Phenotypic difference was evaluated using two approaches: 1) comparison of the morphometric measurements of adult and juvenile individuals at the local scale and between continental and island populations, and 2) comparison of individual color polymorphism between mainland and island populations. Two locations were sampled within the continental part of the Yucatan peninsula and two on the island of Cozumel. The number of samples analyzed at each site was 30 individuals. The morphometric results showed significant differences between continental and island populations, with bigger individuals on the island. In addition, three new variations of the typical color pattern of B. vagans recorded so far were observed. This study opens the door to further investigations to elucidate the origin of the phenotypic variation of the isolated individuals on Cozumel Island. Also, the widest range of color morphs found for a tarantula species is reported.The introduction of species into new ecosystems, especially in small and isolated regions such as islands, offers an excellent opportunity to answer questions of the evolutionary processes occurring in natural conditions on a scale that could never be achieved in laboratory conditions. In this study, we examined the Mexican red rump tarantula Brachypelma vagans Ausserer (Mygalomorphae: Theraphosidae), a species that was introduced to Cozumel Island, Mexico, 40 years ago. This introduction provides an exceptional model to study effects such as morphological variation between island populations and those on the mainland in open habitats facing the island. Intraspecific variation related to the color polymorphism was compared. The aim of this study was to determine the phenotypic differences between continental populations of B. vagans and the introduced population on Cozumel Island. Phenotypic difference was evaluated using two approaches: 1) comparison of the morphometric measurements of adult and juvenile individuals at the local scale and between continental and island populations, and 2) comparison of individual color polymorphism between mainland and island populations. Two locations were sampled within the continental part of the Yucatan peninsula and two on the island of Cozumel. The number of samples analyzed at each site was 30 individuals. The morphometric results showed significant differences between continental and island populations, with bigger individuals on the island. In addition, three new variations of the typical color pattern of B. vagans recorded so far were observed. This study opens the door to further investigations to elucidate the origin of the phenotypic variation of the isolated individuals on Cozumel Island. Also, the widest range of color morphs found for a tarantula species is reported.Adobe Acrobat profesional 6.0 o superiorBrachypelma vagansArañasVariación morfológicaVariación fenotípicaArtfrosurDisponible en líneaJournal of Insect Sciencehttp://insectscience.org/13.95/i1536-2442-13-95.pdfAcceso en línea sin restricciones |