Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand
Abstract Background Fundamental knowledge on the seasonal reproductive microanatomy and endocrinology of reptiles has been collected from several studies of various species. The present study was to determine annual changes in hormonal profiles, and detailed histomorphometric and histochemical chara...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2022-08-01
|
| Series: | BMC Zoology |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40850-022-00145-6 |
| _version_ | 1818504957392846848 |
|---|---|
| author | Akkanee Pewhom Thidaporn Supapakorn Nopparat Srakaew |
| author_facet | Akkanee Pewhom Thidaporn Supapakorn Nopparat Srakaew |
| author_sort | Akkanee Pewhom |
| collection | DOAJ |
| description | Abstract Background Fundamental knowledge on the seasonal reproductive microanatomy and endocrinology of reptiles has been collected from several studies of various species. The present study was to determine annual changes in hormonal profiles, and detailed histomorphometric and histochemical characteristics of the entire male reproductive system of the tropical agamid lizard, Leiolepis ocellata. Results Male L. ocellata individuals (n = 75) collected from the territory of two provinces (Lampang and Tak) in northern Thailand exhibited annual variation in sex hormonal, histomorphometric, and histochemical characteristics of the male reproductive system. The reproductive cycle was subdivided into eight reproductive periods (early first active, first active, resting, second recrudescent, second active, regressive, quiescent, and first recrudescent), thus displaying a bimodal pattern with two actively reproductive periods. Circulating sex hormones (testosterone, estradiol, and progesterone) peaked in the first active (February) and the second active (June–July) periods. Likewise, gonadosomatic index (GSI) and histomorphometric variables of the testes and of the genital ducts (rete testis, ductuli efferentes, ductus epididymis, and ductus deferens) revealed their highest values in the first active period. Marked increase in protein and carbohydrate production was detectable in the ductuli efferentes during the active periods. Conclusions The male reproductive cycle of L. ocellata showed a biannual pattern of the hormonal profile, and detailed histomorphometric and histochemical characteristics of the entire reproductive system. Hence, the present study provides improved basic knowledge on the reptilian reproductive biology with comparative viewpoints to other reptiles. |
| first_indexed | 2024-12-10T21:44:14Z |
| format | Article |
| id | doaj.art-095b3d5b2d0a4f0096508e7d87dd6536 |
| institution | Directory Open Access Journal |
| issn | 2056-3132 |
| language | English |
| last_indexed | 2024-12-10T21:44:14Z |
| publishDate | 2022-08-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Zoology |
| spelling | doaj.art-095b3d5b2d0a4f0096508e7d87dd65362022-12-22T01:32:24ZengBMCBMC Zoology2056-31322022-08-017111810.1186/s40850-022-00145-6Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern ThailandAkkanee Pewhom0Thidaporn Supapakorn1Nopparat Srakaew2Department of Biology, Faculty of Science, Thaksin UniversityDepartment of Statistics, Faculty of Science, Kasetsart UniversityDepartment of Zoology, Faculty of Science, Kasetsart UniversityAbstract Background Fundamental knowledge on the seasonal reproductive microanatomy and endocrinology of reptiles has been collected from several studies of various species. The present study was to determine annual changes in hormonal profiles, and detailed histomorphometric and histochemical characteristics of the entire male reproductive system of the tropical agamid lizard, Leiolepis ocellata. Results Male L. ocellata individuals (n = 75) collected from the territory of two provinces (Lampang and Tak) in northern Thailand exhibited annual variation in sex hormonal, histomorphometric, and histochemical characteristics of the male reproductive system. The reproductive cycle was subdivided into eight reproductive periods (early first active, first active, resting, second recrudescent, second active, regressive, quiescent, and first recrudescent), thus displaying a bimodal pattern with two actively reproductive periods. Circulating sex hormones (testosterone, estradiol, and progesterone) peaked in the first active (February) and the second active (June–July) periods. Likewise, gonadosomatic index (GSI) and histomorphometric variables of the testes and of the genital ducts (rete testis, ductuli efferentes, ductus epididymis, and ductus deferens) revealed their highest values in the first active period. Marked increase in protein and carbohydrate production was detectable in the ductuli efferentes during the active periods. Conclusions The male reproductive cycle of L. ocellata showed a biannual pattern of the hormonal profile, and detailed histomorphometric and histochemical characteristics of the entire reproductive system. Hence, the present study provides improved basic knowledge on the reptilian reproductive biology with comparative viewpoints to other reptiles.https://doi.org/10.1186/s40850-022-00145-6Butterfly lizardReproductive cycleHistomorphologyHistochemistryTestisMale genital duct |
| spellingShingle | Akkanee Pewhom Thidaporn Supapakorn Nopparat Srakaew Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand BMC Zoology Butterfly lizard Reproductive cycle Histomorphology Histochemistry Testis Male genital duct |
| title | Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand |
| title_full | Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand |
| title_fullStr | Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand |
| title_full_unstemmed | Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand |
| title_short | Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand |
| title_sort | male reproductive cycle in a population of the endemic butterfly lizard leiolepis ocellata peters 1971 squamata agamidae from northern thailand |
| topic | Butterfly lizard Reproductive cycle Histomorphology Histochemistry Testis Male genital duct |
| url | https://doi.org/10.1186/s40850-022-00145-6 |
| work_keys_str_mv | AT akkaneepewhom malereproductivecycleinapopulationoftheendemicbutterflylizardleiolepisocellatapeters1971squamataagamidaefromnorthernthailand AT thidapornsupapakorn malereproductivecycleinapopulationoftheendemicbutterflylizardleiolepisocellatapeters1971squamataagamidaefromnorthernthailand AT nopparatsrakaew malereproductivecycleinapopulationoftheendemicbutterflylizardleiolepisocellatapeters1971squamataagamidaefromnorthernthailand |