Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae).
Amphibians are disappearing worldwide. Several species have been lost, and thousands are in danger of extinction. Of the threatened species, some can not be protected in their own natural habitat, therefore it is imperative to accomplish ex-situ conservation actions that assure its preservation. Amb...
| Hauptverfasser: | , , |
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| Format: | Online |
| Sprache: | spa |
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Instituto de Ecología, A.C.
2009
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| Online Zugang: | https://azm.ojs.inecol.mx/index.php/azm/article/view/652 |
| _version_ | 1799770063513845760 |
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| author | Aguilar-Miguel, Xóchitl Legorreta B., Gerardo Casas-Andreu, Gustavo |
| author_facet | Aguilar-Miguel, Xóchitl Legorreta B., Gerardo Casas-Andreu, Gustavo |
| author_sort | Aguilar-Miguel, Xóchitl |
| collection | AZM |
| description | Amphibians are disappearing worldwide. Several species have been lost, and thousands are in danger of extinction. Of the threatened species, some can not be protected in their own natural habitat, therefore it is imperative to accomplish ex-situ conservation actions that assure its preservation. Ambystoma granulosum and Ambystoma lermaense, are species in high priority to be protected by mean of this conservation strategy, since they are endemic species of Mexico and with a concern conservation status. Both species have been little studied, therefore in this study we investigated reproductive aspects that are vital for its conservation, as reproduction in laboratory, and hormonal induction with human chorionic gonadotrophin (hCG). Our results showed not significant difference in the sex morphology for both species, except for the swollen vent in the cloacal region of males. The reproductive cycle is annual and synchronic in males and females, with a maximum of activity from May to September. We obtained clutches only from couples of A. granulosum without hormonal induction in variable numbers with an average of 664 ± 325(SD) eggs and a fecundity from 40 to 90%. We obtained nine clutches from couples of Ambystoma granulosum with hCG induction ranging between 17 and 1182 eggs. In couples of Ambystoma lermaense induced, were obtained 16 clutches, ranging between 110 and 1691 eggs. We analyzed possible causes for the variability in fertility of eggs obtained by induction. |
| format | Online |
| id | azm-article-652 |
| institution | Acta Zoológica Mexicana |
| language | spa |
| publishDate | 2009 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | azm-article-6522022-10-26T23:11:49Z Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae). Reproducción ex situ en Ambystoma Granulosum y Ambystoma Lermaense (Amphibia: Ambystomatidae) Aguilar-Miguel, Xóchitl Legorreta B., Gerardo Casas-Andreu, Gustavo Ambystoma Ambystoma granulosum Ambystoma lermaense reproduction hGC hormonal induction. Ambystoma Ambystoma granulosum Ambystoma lermaense reproducción inducción hormonal con hCG. Amphibians are disappearing worldwide. Several species have been lost, and thousands are in danger of extinction. Of the threatened species, some can not be protected in their own natural habitat, therefore it is imperative to accomplish ex-situ conservation actions that assure its preservation. Ambystoma granulosum and Ambystoma lermaense, are species in high priority to be protected by mean of this conservation strategy, since they are endemic species of Mexico and with a concern conservation status. Both species have been little studied, therefore in this study we investigated reproductive aspects that are vital for its conservation, as reproduction in laboratory, and hormonal induction with human chorionic gonadotrophin (hCG). Our results showed not significant difference in the sex morphology for both species, except for the swollen vent in the cloacal region of males. The reproductive cycle is annual and synchronic in males and females, with a maximum of activity from May to September. We obtained clutches only from couples of A. granulosum without hormonal induction in variable numbers with an average of 664 ± 325(SD) eggs and a fecundity from 40 to 90%. We obtained nine clutches from couples of Ambystoma granulosum with hCG induction ranging between 17 and 1182 eggs. In couples of Ambystoma lermaense induced, were obtained 16 clutches, ranging between 110 and 1691 eggs. We analyzed possible causes for the variability in fertility of eggs obtained by induction. Los anfibios están desapareciendo a nivel mundial. Varias especies se han perdido y miles más están en peligro de extinción. De las especies que están amenazadas, varias no se pueden proteger en su medio natural, por lo que es urgente realizar acciones de conservación ex situ que aseguren su preservación. Ambystoma granulosum y Ambystoma lermaense, son especies prioritarias para iniciar esta estrategia de conservación, ya que son especies endémicas de México y con un estatus de conservación preocupante. Ambas especies han sido poco estudiadas, por lo que en este estudio se investigaron, los aspectos reproductivos que son vitales para la conservación, logrando reproducir a la especie en condiciones de laboratorio de manera natural o espontánea, o por la estimulación hormonal con Gonadotropina Coriónica (hCG). Los resultados obtenidos nos indican que no existen diferencias significativas en la morfología de machos y hembras en ambas especies, excepto por el engrosamiento de la región cloacal en los machos. El ciclo reproductivo es anual y sincrónico en machos y hembras, con actividad máxima entre los meses de mayo a septiembre. Las puestas en parejas sin inducción hormonal fue variable con promedio de 664 ± 325 (DE) huevos y el porcentaje de fecundidad fue de 40 al 90%. En parejas de Ambystoma granulosum con inducción de hCG se obtuvieron nueve puestas variables entre 17 y 1182 huevos. En parejas de A. lermaense inducidos, se obtuvieron 16 puestas, las que variaron entre 110 y 1691 huevos. La fertilidad de los huevos inducidos fue muy variable analizándose posibles causas. Instituto de Ecología, A.C. 2009-12-06 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/652 10.21829/azm.2009.253652 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 25 No. 3 (2009); 443-454 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 25 Núm. 3 (2009); 443-454 2448-8445 0065-1737 spa https://azm.ojs.inecol.mx/index.php/azm/article/view/652/821 Derechos de autor 2009 ACTA ZOOLÓGICA MEXICANA (N.S.) http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Aguilar-Miguel, Xóchitl Legorreta B., Gerardo Casas-Andreu, Gustavo Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae). |
| title | Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae). |
| title_full | Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae). |
| title_fullStr | Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae). |
| title_full_unstemmed | Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae). |
| title_short | Ex situ reproduction in Ambystoma granulosum and Ambystoma lermaense (Amphibia: Ambystomatidae). |
| title_sort | ex situ reproduction in ambystoma granulosum and ambystoma lermaense (amphibia: ambystomatidae). |
| url | https://azm.ojs.inecol.mx/index.php/azm/article/view/652 |
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