Genetic variation and conservation of one population of Crocodylus moreletii in captivity
Inbreeding is a frequent problem in isolated or captive populations, therefore it is necessary to implement strategies to minimize its incidence. Morelet´s crocodile, Crocodylus moreletii, is exploited in captivity and conservation of genetic variation is essential to its management and decision mak...
| Hoofdauteurs: | , |
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| Formaat: | Online |
| Taal: | spa |
| Gepubliceerd in: |
Instituto de Ecología, A.C.
2011
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| Online toegang: | https://azm.ojs.inecol.mx/index.php/azm/article/view/773 |
| _version_ | 1799770098777456640 |
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| author | Serna-Lagunes, Ricardo Díaz-Rivera, Pablo |
| author_facet | Serna-Lagunes, Ricardo Díaz-Rivera, Pablo |
| author_sort | Serna-Lagunes, Ricardo |
| collection | AZM |
| description | Inbreeding is a frequent problem in isolated or captive populations, therefore it is necessary to implement strategies to minimize its incidence. Morelet´s crocodile, Crocodylus moreletii, is exploited in captivity and conservation of genetic variation is essential to its management and decision making in the release of offspring. The aim of this study was to analize population viability, extinctionrisk and effective population size of a C. moreletii captive population. We used simulation models and direct and ecological methods in order to obtain demographic and genetic measures appropriate for captive breeding practices of C. moreletii. It was found that it is feasible to establish a population of 200 crocodiles, which will ensure their survival for 50 years. Ne must be greater than 900, with a sex ratio of one male to 2.5 females and reproductive-adult size class. This would correspond to approximately 84% of effective reproductive crocodiles in the total population, having an inbreeding rate lower than 5.5%. This information would help to conserve 94% of the population genetic variation of C. moreletii in captivity for 100 years, and would let the transmission of viable genetic material to their offspring to be released to the environment. |
| format | Online |
| id | azm-article-773 |
| institution | Acta Zoológica Mexicana |
| language | spa |
| publishDate | 2011 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | azm-article-7732017-10-12T04:37:57Z Genetic variation and conservation of one population of Crocodylus moreletii in captivity Variación genética y conservación de una población de Crocodylus moreletii en cautiverio Serna-Lagunes, Ricardo Díaz-Rivera, Pablo Morelet’s crocodile ex situ conservation increase of inbreeding population viability effective population size crocodile release Cocodrilo de Pantano conservación ex situ incremento de endogamia viabilidad poblacional tamaño efectivo de la población liberación de cocodrilos Inbreeding is a frequent problem in isolated or captive populations, therefore it is necessary to implement strategies to minimize its incidence. Morelet´s crocodile, Crocodylus moreletii, is exploited in captivity and conservation of genetic variation is essential to its management and decision making in the release of offspring. The aim of this study was to analize population viability, extinctionrisk and effective population size of a C. moreletii captive population. We used simulation models and direct and ecological methods in order to obtain demographic and genetic measures appropriate for captive breeding practices of C. moreletii. It was found that it is feasible to establish a population of 200 crocodiles, which will ensure their survival for 50 years. Ne must be greater than 900, with a sex ratio of one male to 2.5 females and reproductive-adult size class. This would correspond to approximately 84% of effective reproductive crocodiles in the total population, having an inbreeding rate lower than 5.5%. This information would help to conserve 94% of the population genetic variation of C. moreletii in captivity for 100 years, and would let the transmission of viable genetic material to their offspring to be released to the environment. La endogamia es un problema frecuente en poblaciones aisladas o en cautiverio, por esto es necesario implementar estrategias que minimicen su incidencia. El cocodrilo de pantano, Crocodylus moreletii, se aprovecha en cautiverio y la conservación de su variación genética es esencial para su explotación y en la toma de decisiones para la liberación de sus crías. El objetivo del estudio fue analizar la viabilidad poblacional, el riesgo de extinción y el tamaño efectivo de población de C. moreletii en cautiverio.Se utilizaron modelos de simulación y métodos directos y ecológicos con la finalidad de obtener las medidas demográficas y genéticas apropiadas para establecerse en los criaderos de C. moreletii. Seencontró que es factible establecer una población de 200 cocodrilos, lo que garantizará su sobrevivencia durante 50 años. El Ne debe ser mayor a 900 cocodrilos, con una proporción de sexos de un macho por 2.5 hembras y con clase de talla adulto-reproductivo; con esto, se tendría un aproximado de 84% de cocodrilos reproductores efectivos en la población total, y presentarían una tasa de endogamia menor al 5.5%. Esta información ayudará a conservar el 94% de la variación genética de la población de C. moreletii en cautiverio durante 100 años, y permitiría la transmisión de material genético viable a las crías para ser liberados al medio natural. Instituto de Ecología, A.C. 2011-12-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Original articles Artículos originales application/pdf https://azm.ojs.inecol.mx/index.php/azm/article/view/773 10.21829/azm.2011.273773 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 27 No. 3 (2011) ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 27 Núm. 3 (2011) 2448-8445 0065-1737 spa https://azm.ojs.inecol.mx/index.php/azm/article/view/773/940 Derechos de autor 2011 ACTA ZOOLÓGICA MEXICANA (N.S.) |
| spellingShingle | Serna-Lagunes, Ricardo Díaz-Rivera, Pablo Genetic variation and conservation of one population of Crocodylus moreletii in captivity |
| title | Genetic variation and conservation of one population of Crocodylus moreletii in captivity |
| title_full | Genetic variation and conservation of one population of Crocodylus moreletii in captivity |
| title_fullStr | Genetic variation and conservation of one population of Crocodylus moreletii in captivity |
| title_full_unstemmed | Genetic variation and conservation of one population of Crocodylus moreletii in captivity |
| title_short | Genetic variation and conservation of one population of Crocodylus moreletii in captivity |
| title_sort | genetic variation and conservation of one population of crocodylus moreletii in captivity |
| url | https://azm.ojs.inecol.mx/index.php/azm/article/view/773 |
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