Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific
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Redalyc · Ciencias Marinas
Due to the current status of the scalloped hammerhead shark (Sphyrna lewini) as a threatened species, the assessment of genetic diversity, divergence, and demographic parameters of populations in the eastern Pacific Ocean may assist in developing appropriate strategies for sustainable fisheries and...
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| Veröffentlicht in: | Ciencias Marinas |
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Autónoma de Baja California
2012
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| _version_ | 1878325299987349504 |
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| author | E Castillo-Olguín |
| author_facet | E Castillo-Olguín |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific E Castillo-Olguín M Uribe-Alcocer P Díaz-Jaimes Ciencias de la Tierra mtDNA Sphyrna lewini microsatellites genetic structure Due to the current status of the scalloped hammerhead shark (Sphyrna lewini) as a threatened species, the assessment of genetic diversity, divergence, and demographic parameters of populations in the eastern Pacific Ocean may assist in developing appropriate strategies for sustainable fisheries and species conservation. We analyzed samples collected from 2001 to 2003 from seven locations in the Mexican Pacific Ocean and two in the southwestern Gulf of Mexico, using single-stranded conformation polymorphism of a mitochondrial control region fragment and five microsatellite loci. The mitochondrial data did not show population divergence among locations from the Mexican Pacific Ocean; however, the microsatellite data showed a divergent population in Baja California. Additional differences were also observed between the northern and central locations of the Mexican Pacific. The historical demography analysis revealed spatial expansion events, possibly related to glacial-interglacial cycles that occurred approximately 450,000 years ago. The divergence found should be considered in the formulation of fisheries management and conservation policies of the species in the region. 2012 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48025112005 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.38 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/2110 10.7773/cm.v38i4.2110 |
| description | Due to the current status of the scalloped hammerhead shark (Sphyrna lewini) as a threatened species, the assessment of genetic diversity, divergence, and demographic parameters of populations in the eastern Pacific Ocean may assist in developing appropriate strategies for sustainable fisheries and species conservation. We analyzed samples collected from 2001 to 2003 from seven locations in the Mexican Pacific Ocean and two in the southwestern Gulf of Mexico, using single-stranded conformation polymorphism of a mitochondrial control region fragment and five microsatellite loci. The mitochondrial data did not show population divergence among locations from the Mexican Pacific Ocean; however, the microsatellite data showed a divergent population in Baja California. Additional differences were also observed between the northern and central locations of the Mexican Pacific. The historical demography analysis revealed spatial expansion events, possibly related to glacial-interglacial cycles that occurred approximately 450,000 years ago. The divergence found should be considered in the formulation of fisheries management and conservation policies of the species in the region.
Debido a la situación actual del tiburón martillo (Sphyrna lewini) como especie amenazada, la evaluación de los niveles de diversidad y divergencia genética, así como de los parámetros demográficos de las poblaciones en el océano Pacifico Oriental, puede ayudar acontribuir a delinear estrategias adecuadas para la pesca sostenible y la conservación de la especie. Se analizaron muestras del periodo 2001–2003 obtenidas de siete localidades en el océano Pacífico mexicano y dos en el sur del golfo de México, mediante la metodología de conformación polimórfica de cadena sencilla de un fragmento de la región control del ADN mitocondrial y el análisis de cinco loci de microsatélites. Los datos mitocondriales no presentaron divergencia entre las localidades del Pacífico mexicano; sin embargo, los datos demicrosatélites mostraron una notable divergencia genética de la población de Baja California (BC) con respecto al resto de las localidades analizadas. Similarmente, se encontraron diferencias significativas entre las localidades del norte y centro del Pacifico mexicano. El análisis de la demografía histórica reveló la incidencia de eventos de expansión espacial de las poblaciones, posiblemente relacionados con los ciclos glaciales-interglaciales ocurridos hace aproximadamente 450,000 años. La divergencia encontrada debe ser considerada en la formulación de políticas de gestión de pesca y de conservación de la especie en la región. |
| format | Artículo científico |
| id | redalyc_48025112005 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2012 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific Evaluación de la estructura genética poblacional de Sphyrna lewini para la identificación de unidades de conservación en el Pacífico mexicano Castillo-Olguín, E Uribe-Alcocer, M Díaz-Jaimes, P Due to the current status of the scalloped hammerhead shark (Sphyrna lewini) as a threatened species, the assessment of genetic diversity, divergence, and demographic parameters of populations in the eastern Pacific Ocean may assist in developing appropriate strategies for sustainable fisheries and species conservation. We analyzed samples collected from 2001 to 2003 from seven locations in the Mexican Pacific Ocean and two in the southwestern Gulf of Mexico, using single-stranded conformation polymorphism of a mitochondrial control region fragment and five microsatellite loci. The mitochondrial data did not show population divergence among locations from the Mexican Pacific Ocean; however, the microsatellite data showed a divergent population in Baja California. Additional differences were also observed between the northern and central locations of the Mexican Pacific. The historical demography analysis revealed spatial expansion events, possibly related to glacial-interglacial cycles that occurred approximately 450,000 years ago. The divergence found should be considered in the formulation of fisheries management and conservation policies of the species in the region. Debido a la situación actual del tiburón martillo (Sphyrna lewini) como especie amenazada, la evaluación de los niveles de diversidad y divergencia genética, así como de los parámetros demográficos de las poblaciones en el océano Pacifico Oriental, puede ayudar acontribuir a delinear estrategias adecuadas para la pesca sostenible y la conservación de la especie. Se analizaron muestras del periodo 2001–2003 obtenidas de siete localidades en el océano Pacífico mexicano y dos en el sur del golfo de México, mediante la metodología de conformación polimórfica de cadena sencilla de un fragmento de la región control del ADN mitocondrial y el análisis de cinco loci de microsatélites. Los datos mitocondriales no presentaron divergencia entre las localidades del Pacífico mexicano; sin embargo, los datos demicrosatélites mostraron una notable divergencia genética de la población de Baja California (BC) con respecto al resto de las localidades analizadas. Similarmente, se encontraron diferencias significativas entre las localidades del norte y centro del Pacifico mexicano. El análisis de la demografía histórica reveló la incidencia de eventos de expansión espacial de las poblaciones, posiblemente relacionados con los ciclos glaciales-interglaciales ocurridos hace aproximadamente 450,000 años. La divergencia encontrada debe ser considerada en la formulación de políticas de gestión de pesca y de conservación de la especie en la región. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2012-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2110 10.7773/cm.v38i4.2110 Ciencias Marinas; Vol. 38 No. 4 (2012); 635-652 Ciencias Marinas; Vol. 38 Núm. 4 (2012); 635-652 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2110/1414 ['Redalyc'] redalyc_48025112005 Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific ['Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific', 'E Castillo-Olguín', 'Ciencias de la Tierra', 'mtDNA', 'Sphyrna lewini', 'microsatellites', 'genetic structure', 'Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific E Castillo-Olguín M Uribe-Alcocer P Díaz-Jaimes Ciencias de la Tierra mtDNA Sphyrna lewini microsatellites genetic structure Due to the current status of the scalloped hammerhead shark (Sphyrna lewini) as a threatened species, the assessment of genetic diversity, divergence, and demographic parameters of populations in the eastern Pacific Ocean may assist in developing appropriate strategies for sustainable fisheries and species conservation. We analyzed samples collected from 2001 to 2003 from seven locations in the Mexican Pacific Ocean and two in the southwestern Gulf of Mexico, using single-stranded conformation polymorphism of a mitochondrial control region fragment and five microsatellite loci. The mitochondrial data did not show population divergence among locations from the Mexican Pacific Ocean; however, the microsatellite data showed a divergent population in Baja California. Additional differences were also observed between the northern and central locations of the Mexican Pacific. The historical demography analysis revealed spatial expansion events, possibly related to glacial-interglacial cycles that occurred approximately 450,000 years ago. The divergence found should be considered in the formulation of fisheries management and conservation policies of the species in the region. 2012 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48025112005 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.38'] ['E Castillo-Olguín'] ['E Castillo-Olguín'] ['Artículo científico'] ['2012'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'mtDNA', 'Sphyrna lewini', 'microsatellites', 'genetic structure'] ['https://www.redalyc.org/articulo.oa?id=48025112005'] ['Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific E Castillo-Olguín M Uribe-Alcocer P Díaz-Jaimes Ciencias de la Tierra mtDNA Sphyrna lewini microsatellites genetic structure Due to the current status of the scalloped hammerhead shark (Sphyrna lewini) as a threatened species, the assessment of genetic diversity, divergence, and demographic parameters of populations in the eastern Pacific Ocean may assist in developing appropriate strategies for sustainable fisheries and species conservation. We analyzed samples collected from 2001 to 2003 from seven locations in the Mexican Pacific Ocean and two in the southwestern Gulf of Mexico, using single-stranded conformation polymorphism of a mitochondrial control region fragment and five microsatellite loci. The mitochondrial data did not show population divergence among locations from the Mexican Pacific Ocean; however, the microsatellite data showed a divergent population in Baja California. Additional differences were also observed between the northern and central locations of the Mexican Pacific. The historical demography analysis revealed spatial expansion events, possibly related to glacial-interglacial cycles that occurred approximately 450,000 years ago. The divergence found should be considered in the formulation of fisheries management and conservation policies of the species in the region. 2012 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48025112005 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.38'] |
| spellingShingle | Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific E Castillo-Olguín Ciencias de la Tierra mtDNA Sphyrna lewini microsatellites genetic structure Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific E Castillo-Olguín M Uribe-Alcocer P Díaz-Jaimes Ciencias de la Tierra mtDNA Sphyrna lewini microsatellites genetic structure Due to the current status of the scalloped hammerhead shark (Sphyrna lewini) as a threatened species, the assessment of genetic diversity, divergence, and demographic parameters of populations in the eastern Pacific Ocean may assist in developing appropriate strategies for sustainable fisheries and species conservation. We analyzed samples collected from 2001 to 2003 from seven locations in the Mexican Pacific Ocean and two in the southwestern Gulf of Mexico, using single-stranded conformation polymorphism of a mitochondrial control region fragment and five microsatellite loci. The mitochondrial data did not show population divergence among locations from the Mexican Pacific Ocean; however, the microsatellite data showed a divergent population in Baja California. Additional differences were also observed between the northern and central locations of the Mexican Pacific. The historical demography analysis revealed spatial expansion events, possibly related to glacial-interglacial cycles that occurred approximately 450,000 years ago. The divergence found should be considered in the formulation of fisheries management and conservation policies of the species in the region. 2012 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48025112005 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.38 |
| title | Assessment of the population genetic structure of Sphyrna lewini to identify conservation units in the Mexican Pacific |
| title_alt | Evaluación de la estructura genética poblacional de Sphyrna lewini para la identificación de unidades de conservación en el Pacífico mexicano |
| topic | Ciencias de la Tierra mtDNA Sphyrna lewini microsatellites genetic structure |
| url | https://www.redalyc.org/articulo.oa?id=48025112005 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2110 |