Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation
The Antillean manatee (Trichechus manatus manatus) occupies the tropical coastal waters of the Greater Antilles and Caribbean, extending from Mexico along Central and South America to Brazil. Historically, manatees were abundant in Mexico, but hunting during the pre-Columbian period, the Spanish colonization and throughout the history of Mexico, has resulted in the significantly reduced population occupying Mexico today. The genetic structure, using microsatellites, shows the presence of two populations in Mexico: the Gulf of Mexico (GMx) and Chetumal Bay (ChB) on the Caribbean coast, with a zone of admixture in between. Both populations show low genetic diversity (GMx: NA = 2.69; HE = 0.41 and ChB: NA = 3.0; HE = 0.46). The lower genetic diversity found in the GMx, the largest manatee population in Mexico, is probably due to a combination of a founder effect, as this is the northern range of the sub-species of T. m. manatus, and a bottleneck event. The greater genetic diversity observed along the Caribbean coast, which also has the smallest estimated number of individuals, is possibly due to manatees that come from the GMx and Belize. There is evidence to support limited or unidirectional gene flow between these two important areas. The analyses presented here also suggest minimal evidence of a handful of individual migrants possibly between Florida and Mexico. To address management issues we suggest considering two distinct genetic populations in Mexico, one along the Caribbean coast and one in the riverine systems connected to the GMx.
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KOHA-OAI-ECOSUR:247722024-03-12T13:00:23ZEvidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation Nourisson Blas, Coralie Doctora 13203 Morales Vela, José Benjamín Doctor autor/a 2028 Padilla Saldívar, Janneth A. 1971- Maestra autor/a 7214 Pause Tucker, Kimberly autor/a Clark, Annmarie autor/a Olivera Gómez, León David autor/a 13899 Bonde, Robert K. autor/a McGuire, Peter M. autor/a 15129 textengThe Antillean manatee (Trichechus manatus manatus) occupies the tropical coastal waters of the Greater Antilles and Caribbean, extending from Mexico along Central and South America to Brazil. Historically, manatees were abundant in Mexico, but hunting during the pre-Columbian period, the Spanish colonization and throughout the history of Mexico, has resulted in the significantly reduced population occupying Mexico today. The genetic structure, using microsatellites, shows the presence of two populations in Mexico: the Gulf of Mexico (GMx) and Chetumal Bay (ChB) on the Caribbean coast, with a zone of admixture in between. Both populations show low genetic diversity (GMx: NA = 2.69; HE = 0.41 and ChB: NA = 3.0; HE = 0.46). The lower genetic diversity found in the GMx, the largest manatee population in Mexico, is probably due to a combination of a founder effect, as this is the northern range of the sub-species of T. m. manatus, and a bottleneck event. The greater genetic diversity observed along the Caribbean coast, which also has the smallest estimated number of individuals, is possibly due to manatees that come from the GMx and Belize. There is evidence to support limited or unidirectional gene flow between these two important areas. The analyses presented here also suggest minimal evidence of a handful of individual migrants possibly between Florida and Mexico. To address management issues we suggest considering two distinct genetic populations in Mexico, one along the Caribbean coast and one in the riverine systems connected to the GMx.The Antillean manatee (Trichechus manatus manatus) occupies the tropical coastal waters of the Greater Antilles and Caribbean, extending from Mexico along Central and South America to Brazil. Historically, manatees were abundant in Mexico, but hunting during the pre-Columbian period, the Spanish colonization and throughout the history of Mexico, has resulted in the significantly reduced population occupying Mexico today. The genetic structure, using microsatellites, shows the presence of two populations in Mexico: the Gulf of Mexico (GMx) and Chetumal Bay (ChB) on the Caribbean coast, with a zone of admixture in between. Both populations show low genetic diversity (GMx: NA = 2.69; HE = 0.41 and ChB: NA = 3.0; HE = 0.46). The lower genetic diversity found in the GMx, the largest manatee population in Mexico, is probably due to a combination of a founder effect, as this is the northern range of the sub-species of T. m. manatus, and a bottleneck event. The greater genetic diversity observed along the Caribbean coast, which also has the smallest estimated number of individuals, is possibly due to manatees that come from the GMx and Belize. There is evidence to support limited or unidirectional gene flow between these two important areas. The analyses presented here also suggest minimal evidence of a handful of individual migrants possibly between Florida and Mexico. To address management issues we suggest considering two distinct genetic populations in Mexico, one along the Caribbean coast and one in the riverine systems connected to the GMx.Adobe Acrobat profesional 6.0 o superiorTrichechus manatusPoblación animalVariación genéticaConservación de la vida silvestreArtfrosurDisponible en líneaGeneticaDisponible para usuarios de ECOSUR con su clave de acceso |
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Trichechus manatus Población animal Variación genética Conservación de la vida silvestre Artfrosur Trichechus manatus Población animal Variación genética Conservación de la vida silvestre Artfrosur |
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Trichechus manatus Población animal Variación genética Conservación de la vida silvestre Artfrosur Trichechus manatus Población animal Variación genética Conservación de la vida silvestre Artfrosur Nourisson Blas, Coralie Doctora 13203 Morales Vela, José Benjamín Doctor autor/a 2028 Padilla Saldívar, Janneth A. 1971- Maestra autor/a 7214 Pause Tucker, Kimberly autor/a Clark, Annmarie autor/a Olivera Gómez, León David autor/a 13899 Bonde, Robert K. autor/a McGuire, Peter M. autor/a 15129 Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation |
| description |
The Antillean manatee (Trichechus manatus manatus) occupies the tropical coastal waters of the Greater Antilles and Caribbean, extending from Mexico along Central and South America to Brazil. Historically, manatees were abundant in Mexico, but hunting during the pre-Columbian period, the Spanish colonization and throughout the history of Mexico, has resulted in the significantly reduced population occupying Mexico today. The genetic structure, using microsatellites, shows the presence of two populations in Mexico: the Gulf of Mexico (GMx) and Chetumal Bay (ChB) on the Caribbean coast, with a zone of admixture in between. Both populations show low genetic diversity (GMx: NA = 2.69; HE = 0.41 and ChB: NA = 3.0; HE = 0.46). The lower genetic diversity found in the GMx, the largest manatee population in Mexico, is probably due to a combination of a founder effect, as this is the northern range of the sub-species of T. m. manatus, and a bottleneck event. The greater genetic diversity observed along the Caribbean coast, which also has the smallest estimated number of individuals, is possibly due to manatees that come from the GMx and Belize. There is evidence to support limited or unidirectional gene flow between these two important areas. The analyses presented here also suggest minimal evidence of a handful of individual migrants possibly between Florida and Mexico. To address management issues we suggest considering two distinct genetic populations in Mexico, one along the Caribbean coast and one in the riverine systems connected to the GMx. |
| format |
Texto |
| topic_facet |
Trichechus manatus Población animal Variación genética Conservación de la vida silvestre Artfrosur |
| author |
Nourisson Blas, Coralie Doctora 13203 Morales Vela, José Benjamín Doctor autor/a 2028 Padilla Saldívar, Janneth A. 1971- Maestra autor/a 7214 Pause Tucker, Kimberly autor/a Clark, Annmarie autor/a Olivera Gómez, León David autor/a 13899 Bonde, Robert K. autor/a McGuire, Peter M. autor/a 15129 |
| author_facet |
Nourisson Blas, Coralie Doctora 13203 Morales Vela, José Benjamín Doctor autor/a 2028 Padilla Saldívar, Janneth A. 1971- Maestra autor/a 7214 Pause Tucker, Kimberly autor/a Clark, Annmarie autor/a Olivera Gómez, León David autor/a 13899 Bonde, Robert K. autor/a McGuire, Peter M. autor/a 15129 |
| author_sort |
Nourisson Blas, Coralie Doctora 13203 |
| title |
Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation |
| title_short |
Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation |
| title_full |
Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation |
| title_fullStr |
Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation |
| title_full_unstemmed |
Evidence of two genetic clusters of manatees with low genetic diversity in Mexico and implications for their conservation |
| title_sort |
evidence of two genetic clusters of manatees with low genetic diversity in mexico and implications for their conservation |
| work_keys_str_mv |
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1794790388604600320 |