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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Autor principal: Gomes, A.D
Otros Autores: Navas, C.A, Jared, C., Antoniazzi, M.M, Ceballos, N.R, Moreira, R.G
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2013
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100 1 |a Gomes, A.D. 
245 1 0 |a Metabolic and endocrine changes during the reproductive cycle of dermatophagic caecilians in captivity 
260 |c 2013 
270 1 0 |m Moreira, R.G.; 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; email: renatagm@ib.usp.br 
506 |2 openaire  |e Política editorial 
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520 3 |a 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.  |l eng 
536 |a Detalles de la financiación: Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq 
536 |a Detalles de la financiación: Fundação de Amparo à Pesquisa do Estado de São Paulo, 07/57107-0 
536 |a Detalles de la financiación: Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq 
536 |a Detalles de la financiación: Fundação de Amparo à Pesquisa do Estado de São Paulo 
536 |a Detalles de la financiación: We thank the employees of CEPLAC (Comissão Executiva do Plano da Lavoura Cacaueira) for their help with field sampling; Fabiana L. Lo Nostro for help in the identification of histological structures; Simone G.S. Jared for technical assistance in caecilian maintenance in captivity; and members of the laboratory for helpful discussions. This research was supported by the São Paulo Research Foundation (FAPESP, Process 07/57107-0) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, grants to C.J., C.A.N., M.M.A. and R.G.M.). 
593 |a 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 
593 |a Laboratório de Biologia Celular, Instituto Butantan, Vital Brasil, n 1500, CEP 05503-900 São Paulo, SP, Brazil 
593 |a Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, C1428EHA Buenos Aires, Argentina 
690 1 0 |a DERMATOPHAGY 
690 1 0 |a GONADAL STEROIDS 
690 1 0 |a REPRODUCTIVE CYCLE 
690 1 0 |a SIPHONOPS ANNULATUS 
690 1 0 |a SKIN FEEDING 
690 1 0 |a AMPHIBIA 
690 1 0 |a ANIMALIA 
690 1 0 |a GYMNOPHIONA 
690 1 0 |a SIPHONOPS ANNULATUS 
690 1 0 |a PROTEIN 
690 1 0 |a SEX HORMONE 
690 1 0 |a AMPHIBIA 
690 1 0 |a ANIMAL 
690 1 0 |a ARTICLE 
690 1 0 |a BLOOD 
690 1 0 |a BODY WEIGHT 
690 1 0 |a DERMATOPHAGY 
690 1 0 |a ENERGY METABOLISM 
690 1 0 |a FEMALE 
690 1 0 |a GONAD 
690 1 0 |a GONADAL STEROIDS 
690 1 0 |a LIPID METABOLISM 
690 1 0 |a MALE 
690 1 0 |a METABOLISM 
690 1 0 |a OVARY CYCLE 
690 1 0 |a REPRODUCTION 
690 1 0 |a SEXUAL MATURATION 
690 1 0 |a SIPHONOPS ANNULATUS 
690 1 0 |a SKIN 
690 1 0 |a SKIN FEEDING 
690 1 0 |a DERMATOPHAGY 
690 1 0 |a GONADAL STEROIDS 
690 1 0 |a REPRODUCTIVE CYCLE 
690 1 0 |a SIPHONOPS ANNULATUS 
690 1 0 |a SKIN FEEDING 
690 1 0 |a AMPHIBIANS 
690 1 0 |a ANIMALS 
690 1 0 |a BODY WEIGHT 
690 1 0 |a ENERGY METABOLISM 
690 1 0 |a FEMALE 
690 1 0 |a GONADAL STEROID HORMONES 
690 1 0 |a GONADS 
690 1 0 |a LIPID METABOLISM 
690 1 0 |a MALE 
690 1 0 |a PROTEINS 
690 1 0 |a REPRODUCTION 
690 1 0 |a SEXUAL MATURATION 
690 1 0 |a SKIN 
700 1 |a Navas, C.A. 
700 1 |a Jared, C. 
700 1 |a Antoniazzi, M.M. 
700 1 |a Ceballos, N.R. 
700 1 |a Moreira, R.G. 
773 0 |d 2013  |g v. 116  |h pp. 277-285  |k n. 5  |p Zoology  |x 09442006  |w (AR-BaUEN)CENRE-7195  |t Zoology 
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