Publicação
Population Genomic Survey of Two Non-Human Primate Species in Sub-Saharan West Africa
| Resumo: | The Primate Order is one of the most successful mammalian taxa. Primates exhibit complex social systems, responsible for regulating food and mating competition. They are extremely diverse, populating the American, African and Asian continents. This study uses genomic approaches to understand the population dynamics of chimpanzees (Pan troglodytes) and western red colobus (Piliocolobus badius) in two west African regions and compare their demographic trajectories under similar environmental circumstances. The chimpanzee has a varied diet and uses many different habitats. The red colobus is strictly folivore and deeply dependent on dense canopies. This study uses whole-genome sequences of nine western chimpanzees (P. t. verus) and eight red colobuses from two subspecies (P. b. badius and P. b. temminckii). Samples were collected in GuineaBissau and in Taï’s National Park (TNP), Ivory Coast. Guinea-Bissau shows a heterogeneous yet fragmented landscape. TNP is a continuous Guinean rainforest in Ivory Coast. Samples were assessed for genetic diversity and population structure, and demographic history was analysed for all populations. This study concludes the red colobus are genetically more differentiated than the chimpanzee. The low gene flow in red colobus may be a consequence of their specialist strategy, which complicates the migration between populations. Guinea-Bissau primates are genetically less diverse than TNP ones, and both TNP primates show high admixture. The red colobus population from Guinea-Bissau is more well-structured than the chimpanzee population. Effective population sizes greatly declined during the last glacial period, with Guinea-Bissau populations experiencing a more recent bottleneck event, and with red colobus showing a stronger population decline. This study is the most complete genomic survey of these primates in West Africa and has suggested how socioecological factors may have influenced the genetic make-up of these populations and how they may affect their response to the current dire state in the region. |
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| Autores principais: | Silva, Francisco Teixeira Batista e |
| Assunto: | África Ocidental Socioecologia Primatas não-humanos Genómica populacional Eventos bottleneck Teses de mestrado - 2024 |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | The Primate Order is one of the most successful mammalian taxa. Primates exhibit complex social systems, responsible for regulating food and mating competition. They are extremely diverse, populating the American, African and Asian continents. This study uses genomic approaches to understand the population dynamics of chimpanzees (Pan troglodytes) and western red colobus (Piliocolobus badius) in two west African regions and compare their demographic trajectories under similar environmental circumstances. The chimpanzee has a varied diet and uses many different habitats. The red colobus is strictly folivore and deeply dependent on dense canopies. This study uses whole-genome sequences of nine western chimpanzees (P. t. verus) and eight red colobuses from two subspecies (P. b. badius and P. b. temminckii). Samples were collected in GuineaBissau and in Taï’s National Park (TNP), Ivory Coast. Guinea-Bissau shows a heterogeneous yet fragmented landscape. TNP is a continuous Guinean rainforest in Ivory Coast. Samples were assessed for genetic diversity and population structure, and demographic history was analysed for all populations. This study concludes the red colobus are genetically more differentiated than the chimpanzee. The low gene flow in red colobus may be a consequence of their specialist strategy, which complicates the migration between populations. Guinea-Bissau primates are genetically less diverse than TNP ones, and both TNP primates show high admixture. The red colobus population from Guinea-Bissau is more well-structured than the chimpanzee population. Effective population sizes greatly declined during the last glacial period, with Guinea-Bissau populations experiencing a more recent bottleneck event, and with red colobus showing a stronger population decline. This study is the most complete genomic survey of these primates in West Africa and has suggested how socioecological factors may have influenced the genetic make-up of these populations and how they may affect their response to the current dire state in the region. |
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