Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula)
The red-footed booby (Sula sula) is considered one of the most polymorphic seabirds, with three recognized major adult plumage types: (1) white; (2) white-tailed brown; and (3) brown, and several degrees of intermediates. The ratio of these color morphs varies among populations, with the white morph...
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ftunivmissouriir:oai:irl.umsl.edu:dissertation-1517 2023-05-15T18:21:14+02:00 Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula) Baiao, Patricia Carvalho 2009-07-15T07:00:00Z application/pdf https://irl.umsl.edu/dissertation/516 https://irl.umsl.edu/cgi/viewcontent.cgi?article=1517&context=dissertation unknown IRL @ UMSL https://irl.umsl.edu/dissertation/516 https://irl.umsl.edu/cgi/viewcontent.cgi?article=1517&context=dissertation Dissertations Sulidae Sula sula Plumage polymorphism Melanocortin-1 Receptor Assortative mating Gene flow Bottleneck Microsatellites Extra-pair paternity Biology text 2009 ftunivmissouriir 2021-07-27T17:12:09Z The red-footed booby (Sula sula) is considered one of the most polymorphic seabirds, with three recognized major adult plumage types: (1) white; (2) white-tailed brown; and (3) brown, and several degrees of intermediates. The ratio of these color morphs varies among populations, with the white morph typically predominating. However, there are a few populations that present an inversed ratio of color morphs, such as Isla Europa in the Indian Ocean and the Galapagos archipelago, with the white-tailed brown or brown morphs predominating. I studied natural populations of red-footed boobies from three geographic locations, namely, the Galapagos archipelago, Johnston Atoll in the Pacific Ocean, and the Fernando de Noronha archipelago in the South Atlantic Ocean, to investigate the genetic basis of plumage polymorphism as well as possible mechanisms maintaining the polymorphism and variation in the ratios of color morphs. To determine the genetic basis of the polymorphism, I investigated the role played by the candidate locus Melanocortin-1 receptor (MC1R). By examining alleles in the MC1R locus in the context of phylogeny of the Sulidae family, I investigate the scope of involvement of the MC1R locus in determining the different plumage colors and patterns among the ten species in this family. Several potential mechanisms maintaining the polymorphism and the differential ratio of color morphs among locations were evaluated; both selective and neutral mechanisms were explored, such as non-random mating and limited gene flow, as well as historical evolutionary events such as founder effect and bottleneck events. Text South Atlantic Ocean University of Missouri, St. Louis: IRL @ UMSL Galapagos Indian Pacific |
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University of Missouri, St. Louis: IRL @ UMSL |
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ftunivmissouriir |
language |
unknown |
topic |
Sulidae Sula sula Plumage polymorphism Melanocortin-1 Receptor Assortative mating Gene flow Bottleneck Microsatellites Extra-pair paternity Biology |
spellingShingle |
Sulidae Sula sula Plumage polymorphism Melanocortin-1 Receptor Assortative mating Gene flow Bottleneck Microsatellites Extra-pair paternity Biology Baiao, Patricia Carvalho Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula) |
topic_facet |
Sulidae Sula sula Plumage polymorphism Melanocortin-1 Receptor Assortative mating Gene flow Bottleneck Microsatellites Extra-pair paternity Biology |
description |
The red-footed booby (Sula sula) is considered one of the most polymorphic seabirds, with three recognized major adult plumage types: (1) white; (2) white-tailed brown; and (3) brown, and several degrees of intermediates. The ratio of these color morphs varies among populations, with the white morph typically predominating. However, there are a few populations that present an inversed ratio of color morphs, such as Isla Europa in the Indian Ocean and the Galapagos archipelago, with the white-tailed brown or brown morphs predominating. I studied natural populations of red-footed boobies from three geographic locations, namely, the Galapagos archipelago, Johnston Atoll in the Pacific Ocean, and the Fernando de Noronha archipelago in the South Atlantic Ocean, to investigate the genetic basis of plumage polymorphism as well as possible mechanisms maintaining the polymorphism and variation in the ratios of color morphs. To determine the genetic basis of the polymorphism, I investigated the role played by the candidate locus Melanocortin-1 receptor (MC1R). By examining alleles in the MC1R locus in the context of phylogeny of the Sulidae family, I investigate the scope of involvement of the MC1R locus in determining the different plumage colors and patterns among the ten species in this family. Several potential mechanisms maintaining the polymorphism and the differential ratio of color morphs among locations were evaluated; both selective and neutral mechanisms were explored, such as non-random mating and limited gene flow, as well as historical evolutionary events such as founder effect and bottleneck events. |
format |
Text |
author |
Baiao, Patricia Carvalho |
author_facet |
Baiao, Patricia Carvalho |
author_sort |
Baiao, Patricia Carvalho |
title |
Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula) |
title_short |
Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula) |
title_full |
Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula) |
title_fullStr |
Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula) |
title_full_unstemmed |
Evolution and Maintenance of Plumage Polymorphism: the case of the Red-footed booby (Sula sula) |
title_sort |
evolution and maintenance of plumage polymorphism: the case of the red-footed booby (sula sula) |
publisher |
IRL @ UMSL |
publishDate |
2009 |
url |
https://irl.umsl.edu/dissertation/516 https://irl.umsl.edu/cgi/viewcontent.cgi?article=1517&context=dissertation |
geographic |
Galapagos Indian Pacific |
geographic_facet |
Galapagos Indian Pacific |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Dissertations |
op_relation |
https://irl.umsl.edu/dissertation/516 https://irl.umsl.edu/cgi/viewcontent.cgi?article=1517&context=dissertation |
_version_ |
1766200399323201536 |