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Genetic diversity of the shiny Cowbird (Molothrus bonariensis minimus): A mtDNA study on the variability within original and expanded range
Genetic diversity of the shiny Cowbird (Molothrus bonariensis minimus): A mtDNA study on the variability within original and expanded range
dc.contributor.advisor | Martínez-Cruzado, Juan C. | |
dc.contributor.author | Porrata-Doria Rivera, Tirtsa | |
dc.contributor.college | College of Arts and Sciences - Sciences | en_US |
dc.contributor.committee | Lewis, Allen R. | |
dc.contributor.committee | López-Ortiz, Ricardo | |
dc.contributor.department | Department of Biology | en_US |
dc.contributor.representative | Saliva, Jorge | |
dc.date.accessioned | 2018-05-16T17:03:44Z | |
dc.date.available | 2018-05-16T17:03:44Z | |
dc.date.issued | 2006 | |
dc.description.abstract | The geographic range of the Shiny Cowbird (Molothrus bonariensis minimus) was limited to northeastern South America until the twentieth century. However, this range has expanded to the Caribbean and more recently to the United States. It has jeopardized the population of over 200 avian species within its novel expanded range because of its parasitic behavior. The rapid successful expansion of the Shiny Cowbird, if based on a small number of migrants, may have resulted in a loss of genetic diversity. This study examined the Shiny Cowbird’s genetic diversity in both its original and expanded ranges by means of mitochondrial DNA. Sequences of 5 genes and the control region reflected a single haplotype in 34 samples in the expanded range, and 2 haplotypes in 3 birds in the original range. Genetic estimates indicated: pˆ of 0.00043, K of 0.00141, Ĥ of 0.66667, and FST of 0.85771. These estimates indicate lack of gene flow and differentiation between the original and expanded range specimens. These results agree with a founder event. | en_US |
dc.description.abstract | La región geográfica del tordo lustroso (Molothrus bonariensis minimus) estuvo limitado a América del Sur hasta el siglo veinte. Sin embargo, ésta región se ha expandido al Caribe y mas recientemente a los Estados Unidos. Ésta especie ha comprometido las poblaciones de más de 200 otras especies de aves. La rápida sucesión y exitosa expansión del Tordo lustroso, si es basada en un número pequeño de migrantes puede haber limitado la variabilidad genética en ambas áreas. Éste estudio investigó la diversidad genética del tordo lustroso entre especímenes del área original y el área expandida con el ADN mitocondrial. Secuencias de 5 genes y la región control reflejaron un haplotipo en 34 muestras en el área expandida y dos haplotipos en 3 muestras en el área original. Estimados genéticos muestran: pˆ de 0.00043, K de 0.00141, Ĥ de 0.66667 y FST de 0.85771. Estos estimados indican flujo genético limitado y diferenciación entre los especímenes del área original y expandida. Estos resultados concuerdan con un efecto fundador. | en_US |
dc.description.graduationYear | 2006 | en_US |
dc.description.sponsorship | Yellow Shouldered Blackbird Recovery Project of the Department of Natural and Environmental Resources. Annette Díaz, from the Puerto Rico Health Department. Robb Brumfield and Donna Dittman of the Louisiana State University Museum of Natural Sciences, Department of Genetic Resources for their assistance in the loan of seven Shiny Cowbirds specimens.. David Willard, Bird Collection manager of the Field Museum of Natural History, for his assistance in the loan of specimen 89288.. | en_US |
dc.identifier.uri | https://hdl.handle.net/20.500.11801/627 | |
dc.language.iso | en | en_US |
dc.rights.holder | (c) 2006 Tirtsa Porrata-Doria Rivera | en_US |
dc.rights.license | All rights reserved | en_US |
dc.subject | Shiny Cowbird | en_US |
dc.subject | Molothrus bonariensis minimus | en_US |
dc.subject | Avian species | en_US |
dc.subject | Shiny Cowbird’s genetic diversity | en_US |
dc.subject | Mitochondrial DNA | en_US |
dc.subject.lcsh | Molothrus--Genetics | en_US |
dc.subject.lcsh | Molothrus--Home range | en_US |
dc.subject.lcsh | Molothrus--Variation | en_US |
dc.title | Genetic diversity of the shiny Cowbird (Molothrus bonariensis minimus): A mtDNA study on the variability within original and expanded range | en_US |
dc.type | Thesis | en_US |
dspace.entity.type | Publication | |
thesis.degree.discipline | Biology | en_US |
thesis.degree.level | M.S. | en_US |
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