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Abstract:

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.

Registro:

Documento: Artículo
Título:Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity
Autor:Gomes, A.D.; Navas, C.A.; Jared, C.; Antoniazzi, M.M.; Ceballos, N.R.; Moreira, R.G.
Filiación:Departamento de Fisiologia, Instituto de Biociências da Universidade de São Paulo, Rua do Matão, trav. 14, n 321, CEP 05508-090 São Paulo, SP, Brazil
Laboratório de Biologia Celular, Instituto Butantan, Vital Brasil, n 1500, CEP 05503-900 São Paulo, SP, Brazil
Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, C1428EHA Buenos Aires, Argentina
Palabras clave: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
Año:2013
Volumen:116
Número:5
Página de inicio:277
Página de fin:285
DOI: http://dx.doi.org/10.1016/j.zool.2013.06.002
Título revista:Zoology
Título revista abreviado:Zoology
ISSN:09442006
CAS:protein, 67254-75-5
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09442006_v116_n5_p277_Gomes

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Citas:

---------- APA ----------
Gomes, A.D., Navas, C.A., Jared, C., Antoniazzi, M.M., Ceballos, N.R. & Moreira, R.G. (2013) . Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity. Zoology, 116(5), 277-285.
http://dx.doi.org/10.1016/j.zool.2013.06.002
---------- CHICAGO ----------
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" . Zoology 116, no. 5 (2013) : 277-285.
http://dx.doi.org/10.1016/j.zool.2013.06.002
---------- MLA ----------
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" . Zoology, vol. 116, no. 5, 2013, pp. 277-285.
http://dx.doi.org/10.1016/j.zool.2013.06.002
---------- VANCOUVER ----------
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. Zoology. 2013;116(5):277-285.
http://dx.doi.org/10.1016/j.zool.2013.06.002