Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity
The amphibian order Gymnophiona is poorly known, and studies about their reproduction are mainly comparative and descriptive, focusing on the structure of testes, ovaries and oviducts. However, to understand the reproductive processes, including those of the oviparous dermatophagic species, it is im...
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todo:paper_09442006_v116_n5_p277_Gomes2023-10-03T15:49:10Z Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity Gomes, A.D. Navas, C.A. Jared, C. Antoniazzi, M.M. Ceballos, N.R. Moreira, R.G. Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibia Animalia Gymnophiona Siphonops annulatus protein sex hormone Amphibia animal article blood body weight Dermatophagy energy metabolism female gonad Gonadal steroids lipid metabolism male metabolism ovary cycle reproduction sexual maturation Siphonops annulatus skin Skin feeding Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibians Animals Body Weight Energy Metabolism Female Gonadal Steroid Hormones Gonads Lipid Metabolism Male Proteins Reproduction Sexual Maturation Skin The amphibian order Gymnophiona is poorly known, and studies about their reproduction are mainly comparative and descriptive, focusing on the structure of testes, ovaries and oviducts. However, to understand the reproductive processes, including those of the oviparous dermatophagic species, it is important to know the dynamics of storage and mobilization of energetic substrates to gonads and skin during the reproductive cycle of males and females, as well as the endocrine control associated. For the present study, total lipids and proteins were measured during the annual cycle in the plasma, liver, muscle, testes, ovaries and skin of Siphonops annulatus in captivity. Plasma levels of gonadal steroids (estradiol, testosterone and progesterone) were quantified by radioimmunoassay. Histological analyses of ovaries and testes were performed to classify the maturation stages of the animals during the reproductive cycle. Gonadal maturation in males and females of S. annulatus was accompanied by metabolic changes in reserve tissues, which supported gonadal development and prepared the females' epidermis for skin feeding by the offspring. Even in confinement conditions, females and males synchronized the reproductive period. However, due to the absence of environmental cues in captivity inadequate levels of the hormones responsible for gamete release were triggered, leading to a lack of reproductive success. © 2013 Elsevier GmbH. Fil:Ceballos, N.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09442006_v116_n5_p277_Gomes |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibia Animalia Gymnophiona Siphonops annulatus protein sex hormone Amphibia animal article blood body weight Dermatophagy energy metabolism female gonad Gonadal steroids lipid metabolism male metabolism ovary cycle reproduction sexual maturation Siphonops annulatus skin Skin feeding Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibians Animals Body Weight Energy Metabolism Female Gonadal Steroid Hormones Gonads Lipid Metabolism Male Proteins Reproduction Sexual Maturation Skin |
| spellingShingle |
Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibia Animalia Gymnophiona Siphonops annulatus protein sex hormone Amphibia animal article blood body weight Dermatophagy energy metabolism female gonad Gonadal steroids lipid metabolism male metabolism ovary cycle reproduction sexual maturation Siphonops annulatus skin Skin feeding Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibians Animals Body Weight Energy Metabolism Female Gonadal Steroid Hormones Gonads Lipid Metabolism Male Proteins Reproduction Sexual Maturation Skin Gomes, A.D. Navas, C.A. Jared, C. Antoniazzi, M.M. Ceballos, N.R. Moreira, R.G. Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity |
| topic_facet |
Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibia Animalia Gymnophiona Siphonops annulatus protein sex hormone Amphibia animal article blood body weight Dermatophagy energy metabolism female gonad Gonadal steroids lipid metabolism male metabolism ovary cycle reproduction sexual maturation Siphonops annulatus skin Skin feeding Dermatophagy Gonadal steroids Reproductive cycle Siphonops annulatus Skin feeding Amphibians Animals Body Weight Energy Metabolism Female Gonadal Steroid Hormones Gonads Lipid Metabolism Male Proteins Reproduction Sexual Maturation Skin |
| description |
The amphibian order Gymnophiona is poorly known, and studies about their reproduction are mainly comparative and descriptive, focusing on the structure of testes, ovaries and oviducts. However, to understand the reproductive processes, including those of the oviparous dermatophagic species, it is important to know the dynamics of storage and mobilization of energetic substrates to gonads and skin during the reproductive cycle of males and females, as well as the endocrine control associated. For the present study, total lipids and proteins were measured during the annual cycle in the plasma, liver, muscle, testes, ovaries and skin of Siphonops annulatus in captivity. Plasma levels of gonadal steroids (estradiol, testosterone and progesterone) were quantified by radioimmunoassay. Histological analyses of ovaries and testes were performed to classify the maturation stages of the animals during the reproductive cycle. Gonadal maturation in males and females of S. annulatus was accompanied by metabolic changes in reserve tissues, which supported gonadal development and prepared the females' epidermis for skin feeding by the offspring. Even in confinement conditions, females and males synchronized the reproductive period. However, due to the absence of environmental cues in captivity inadequate levels of the hormones responsible for gamete release were triggered, leading to a lack of reproductive success. © 2013 Elsevier GmbH. |
| format |
JOUR |
| author |
Gomes, A.D. Navas, C.A. Jared, C. Antoniazzi, M.M. Ceballos, N.R. Moreira, R.G. |
| author_facet |
Gomes, A.D. Navas, C.A. Jared, C. Antoniazzi, M.M. Ceballos, N.R. Moreira, R.G. |
| author_sort |
Gomes, A.D. |
| title |
Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity |
| title_short |
Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity |
| title_full |
Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity |
| title_fullStr |
Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity |
| title_full_unstemmed |
Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity |
| title_sort |
metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity |
| url |
http://hdl.handle.net/20.500.12110/paper_09442006_v116_n5_p277_Gomes |
| work_keys_str_mv |
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1807323834651508736 |