Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus
Plasma leveis of six hormones (estradiol, progestsrone, testosterona, dihydrotestosterone, androstenediona, and corticosterons) were obtainad for males and femalea of Sceloporus virgatus (Phrynosomatidae) during and after the seasonal peak of mating activity. Seasonal variation in hormone levels was...
| Autor principal: | |
|---|---|
| Format: | Online |
| Idioma: | eng |
| Publicat: |
Instituto de Ecología, A.C.
1998
|
| Accés en línia: | https://azm.ojs.inecol.mx/index.php/azm/article/view/1720 |
| _version_ | 1799770258831048704 |
|---|---|
| author | Abelí., Allison J. |
| author_facet | Abelí., Allison J. |
| author_sort | Abelí., Allison J. |
| collection | AZM |
| description | Plasma leveis of six hormones (estradiol, progestsrone, testosterona, dihydrotestosterone, androstenediona, and corticosterons) were obtainad for males and femalea of Sceloporus virgatus (Phrynosomatidae) during and after the seasonal peak of mating activity. Seasonal variation in hormone levels was found. Females had higher corticosterone levels in August (well after oviposition) than in April (soon after emergance), but male corticosterona levels were lowest in August. Seasonal variation in basal corticosterone levels may reflect between-sex differences in the time of peak physiological stress. Male androgen levels peaked in April and May, coinciding with the peak of mating activity. Ventral coloration is exhibited during the social displays of many phrynosomatid lizards. Androganic influences on ventral coloration have been documentad in some lizards. Males and famales of S. virgatus have a greatly reduced amount and intensity of blue ventral coloration relativo to most other specíes in the genus. Variation in the size and color intensity of the blue ventral throat patch in males was not asociated with vanation in male hormone levels. Male peak testosterone levels in S. vigratus were comparable to those reported for other Scelopurus species with larger and brighter blue patches |
| format | Online |
| id | azm-article-1720 |
| institution | Acta Zoológica Mexicana |
| language | eng |
| publishDate | 1998 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | azm-article-17202022-10-03T23:18:04Z Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus Abelí., Allison J. Scelopurus virgatus coloiation lizard Hormonas Scehporus virgatus coloración lagartijas Plasma leveis of six hormones (estradiol, progestsrone, testosterona, dihydrotestosterone, androstenediona, and corticosterons) were obtainad for males and femalea of Sceloporus virgatus (Phrynosomatidae) during and after the seasonal peak of mating activity. Seasonal variation in hormone levels was found. Females had higher corticosterone levels in August (well after oviposition) than in April (soon after emergance), but male corticosterona levels were lowest in August. Seasonal variation in basal corticosterone levels may reflect between-sex differences in the time of peak physiological stress. Male androgen levels peaked in April and May, coinciding with the peak of mating activity. Ventral coloration is exhibited during the social displays of many phrynosomatid lizards. Androganic influences on ventral coloration have been documentad in some lizards. Males and famales of S. virgatus have a greatly reduced amount and intensity of blue ventral coloration relativo to most other specíes in the genus. Variation in the size and color intensity of the blue ventral throat patch in males was not asociated with vanation in male hormone levels. Male peak testosterone levels in S. vigratus were comparable to those reported for other Scelopurus species with larger and brighter blue patches Los niveles plasmáticos de seis hormonas (estradiol, progesterona, testosterona, dihidrotestosterona, androstenediona y corticosterona) en machos y hembras de Scehporus virgatus (Phrynosomatidae) fueron obtenidos durante y después de la temporada alta de apareo. Se encontró variación en los niveles hormonales relacionados con la temporada de la actividad reproductiva. Las hembras tuvieron un nivel de corticosterona más alto en agosto (después de la oviposición) que en abril (inmediatamente después de la eclosión), mientras que en los machos el nivel fue más bajo en agosto. La variación basal de la corticosterona podría reflejar diferencias sexuales en la época de máximo estrés fisiológico. Los machos presentaron altos niveles de las hormonas androgénicas en los meses de abril y mayo, coincidiendo con la temporada alta de apareo. Muchas lagartijas de la familia Phrynosomatidae muestran coloración ventral durante los despliegues sociales. En algunas especies de lagartijas se han reportado influencias androgénicas sobre esta coloración ventral. Tanto los machos como las hembras de S. virgatus presentan una gran reducción en la cantidad e intensidad de la mancha azul en la parte ventral en comparación con otras especies del mismo género. Sin embargo, la variación en el tamaño y brillo de la mancha azul, en la parte ventral del cuello, no está relacionada con la variación de ios niveles hormonales. Los niveles máximos de testosterona en los machos de S. virgatus son similares a los encontrados en otras especies de Sceloporus con manchas azules más grandes y brillantes. Instituto de Ecología, A.C. 1998-08-14 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/1720 10.21829/azm.1998.74741720 ACTA ZOOLÓGICA MEXICANA (N.S.); No. 74 (1998); 43-57 ACTA ZOOLÓGICA MEXICANA (N.S.); Núm. 74 (1998); 43-57 2448-8445 0065-1737 eng https://azm.ojs.inecol.mx/index.php/azm/article/view/1720/1834 Derechos de autor 2018 Acta Zoológica Mexicana (parte1) http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Abelí., Allison J. Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus |
| title | Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus |
| title_full | Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus |
| title_fullStr | Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus |
| title_full_unstemmed | Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus |
| title_short | Reproctive and post-reproductive hormone levels in the lizard Sceloporus virgatus |
| title_sort | reproctive and post-reproductive hormone levels in the lizard sceloporus virgatus |
| url | https://azm.ojs.inecol.mx/index.php/azm/article/view/1720 |
| work_keys_str_mv | AT abeliallisonj reproctiveandpostreproductivehormonelevelsinthelizardsceloporusvirgatus |
