Spermatogenesis in Sceloporus variabilis (Squamata, Phrynosomatidae): A non-quiescent pattern
| Autor: | Oswaldo Hernández-Gallegos, Gisela Granados-González, Justin L. Rheubert, Maricela Villagrán-SantaCruz, Kevin M. Gribbins, Eric Peña‐Herrera |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Abiotic component education.field_of_study Squamata Phylogenetic tree biology Phenology Ecology Lizard Population Cell Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Sceloporus variabilis 030104 developmental biology Taxon biology.animal Animal Science and Zoology education Ecology Evolution Behavior and Systematics |
| Zdroj: | Acta Zoologica. 100:43-52 |
| ISSN: | 0001-7272 |
| DOI: | 10.1111/azo.12229 |
| Popis: | Gaining a deeper understanding of spermatogenic cycles within squamates has aided in our knowledge of the controls of reproduction and has bettered our understanding of reproductive phenology. One of the most studied genera of squamates, Sceloporus, is widely distributed along a latitudinal and elevational gradient in temperate, tropical, low-elevation and high-elevation habitats. Due to this wide distribution and varying habitats, Sceloporus exhibit differences in their spermatogenic activity (including both cyclical and acyclical patterns) and may be one of the most useful genera for understanding the abiotic correlations with spermatogenesis. The spermatogenic activity in Sceloporus variabilis was studied histologically (in a population that inhabits a tropical region at Los Tuxtlas, Veracruz, Mexico) and found to exhibit a unique cyclical pattern with an extended period of maximum activity (from November to July) and the absence of regression and quiescence. Furthermore, these data corroborate previous works on the spermatogenic cycles of S. variabilis despite different populations utilised. These data suggest that although abiotic factors may play a role in the timing of spermatogenesis, phylogenetic signal may be equally as important. More data concerning spermatogenic cycles in phylogenetically related taxa from differing habitats will elucidate the patterns of spermatogenic diversity. |
| Databáze: | OpenAIRE |
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