Identificação sexual através do estudo anatômico do sistema urogenital em recém-eclodidos e jovens de Trachemys dorbignyi (Duméril &amp; Bibron) (Reptilia, Testudines, Emydidae)

Malvasio, Adriana; Gomes, Norma; Farias, Eduardo Cunha

doi:10.1590/S0101-81751999000100004

Resumo

Individuals of Trachemys dorbignyi (Duméril & Bibron, 1835) less than 12 months old are examined for sexual identification through anatomical study of urogenital system. Histological analysis is used to confirm sexual identification. It is concluded that accurate sexual identification is possible in hatchlings using gonadal morphology. Differences between testes and ovaries are clear so histological analysis is necessary for this species only in case of doubts.

Testudines; Trachemys dorbignyi; urogenital system; sexual identification

Identificação sexual através do estudo anatômico do sistema urogenital em recém-eclodidos e jovens de Trachemys dorbignyi (Duméril & Bibron) (Reptilia, Testudines, Emydidae)

Sexual identification using anatomical study of urogenital system in hatchlings and juveniles of tracHemys dorbignyi (Duméril & Bibron) (Reptilia, Testudines, Emydidae)

Adriana Malvasio^I; Norma Gomes^II; Eduardo Cunha Farias^III

^IDepartamento de Zoologia, Instituto de Biociências, Universidade de São Paulo. Rua do Matão, Travessa 14 321, 05508-900 São Paulo, São Paulo, Brasil

^IIMuseu de Zoologia, Universidade de São Paulo. Avenida Nazaré 481, 04263-000 São Paulo, São Paulo, Brasil

^IIIInstituto de Ciências Biomédicas, Universidade de São Paulo. Avenida Professor Lineu Prestes 1524, 05508-900 São Paulo, São Paulo, Brasil

ABSTRACT

Individuals of Trachemys dorbignyi (Duméril & Bibron, 1835) less than 12 months old are examined for sexual identification through anatomical study of urogenital system. Histological analysis is used to confirm sexual identification. It is concluded that accurate sexual identification is possible in hatchlings using gonadal morphology. Differences between testes and ovaries are clear so histological analysis is necessary for this species only in case of doubts.

Key words: Testudines, Trachemys dorbignyi, urogenital system, sexual identification

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AGRADECIMENTOS. Ao diretor da Fundação Parque Zoológico de São Paulo, Dr. Adayr Mafuz Saliba, ao chefe do Setor de Répteis, Mario Borges da Rocha e ao Dr. Flavio de Barros Molina, pelo fornecimento do material e apoio recebido. Ao Dr. Flavio de Barros Molina, agradecemos também pela leitura, sugestões ao manuscrito e pelas comunicações pessoais. Ao diretor do Museu de Zoologia da Universidade de São Paulo, Dr. José Luís M. Leme, pelo uso das instalações e aos demais funcionários, pelo apoio recebido. A Maria Tereza Osório Mallmann, pelas comunicações pessoais. A capes, pela Bolsa de Mestrado concedida à Adriana Malvasio.

Recebido em 27.VI.1997; aceito em 25.I.1999.

ALHO, C.J.R.; T.M.S. DANNI & L.F.M. PÁDUA. 1985. Temperature-dependent Sex Determination in Podocnemis expansa (Testudinata: Pelomedusidae). Biotropica 17 (1): 75-78.
ASHLEY, L.M. 1955. Laboratory Anatomy of the Turtle. Iowa, WM. C. Brown Company. 48p.
BULL, J.J. & R.C. VOGT. 1979. Temperature-dependent Sex Determination in Turtles. Science 206: 1186-1188.
CAGLE, F.R. 1946. The Growth of the Slider Turtle, Pseudemys scripta elegans. Amer. Midland Nat. 36: 685-729.
DANNI, T.M.S. & C.J.R. ALHO. 1985. Estudo Histológico da Diferenciação Sexual em Tartarugas Recém-Eclodidas (Podocnemis expansa, Pelomedusidae). Rev. Brasil. Biol. 45 (3): 365-368.
MEDEM, F. 1976. Recomendaciones Respecto a Contar el Escamado y Tomar las Dimensiones de Nidos, Huevos y Ejemplares de los Crocodylia y Testudines. Lozania 20: 1-17.
MILLER, J.D. & C.J. LIMPUS. 1981. Incubation period and sexual differentiation in the green turtle Chelonia mydas L. Melburne Herpetological Symposioum, Victoria, 1980, p. 66-73. In:C.B. BANKS & A.A. MARTIN (Ed.). Proceedings of Melburne Herpetological Symposioum, Victoria.
MROSOVSKY, N. & M.H. GODFREY. 1995. Manipulating Sex Ratios: Turtles Speed Ahead! Chelonian Conservation and Biology 1 (3): 238-240.
NOBLE, G.A. & E.R. NOBLE. 1940. A brief anatomy of the turtle. California, Standford University Press. 46p.
PRITCHARD, P.C.H. & P. TREBBAU. 1984. The Turtles of Venezuela. Caracas, Society for the Study of Amphibians and Reptiles, 403p.
RISLEY, P.L. 1933. Contributions on the Development of the Reproductive System in the Musk Turtle, Sternotherus odoratus (Latreille). II. Gonadogenesis and Sex Differentiation. Zeitschrift für Zellforschung und mikroskopische Anatomie 18: 493-543.
RHODIN, A.G.J. & R.A. MITTERMEIER. 1976. Chelodina parkeri, A New Species of Chelid Turtle from New Guinea, with a Discussion of Chelodina siebenrocki Werner, 1901. Bull. Mus. Comp. Zool., Harvard, 147 (11): 465-488.
SILVA, F. de A. 1986. La Temperatura Como Factor Determinante de Diferenciación sexual en Lepidochelys olivacea (Tortuga Golfina). Tiempos de Ciência 2: 17-20.
STANDORA, E.A. & J.R. SPOTILA. 1985. Temperature Dependent Sex Determination in Sea Turtles. Copeia 1985 (3): 711-722.
VAN DER HEIDEN, A.M.; R. BRISEÑO-DUEÑAS & D. RIOS-OLMEDA. 1985. A Simplified Method for Determination Sex in Hatchling Sea Turtles. Copeia 1985(3): 779-782.
VOGT, R.C. 1994. Temperature Controlled Sex Determination as a Tool for Turtle Conversation. Chelonian Conservation and Biology 1 (2): 159-162.
WHITMORE, C; P. DUTTON & M. MROSOVSKY. 1985. Sexing of Hatching Sea Turtles: Gross Appearance Versus Histology. Jour. Herpetol. 19 (3): 430-431.
YNTEMA, C.L. 1976. Effects of Incubation Temperatures on Sexual Differentiation in the Turtle, Chelydra serpentina. Jour. Morphol. 150: 453-462.
______ . 1981. Characteristics of Gonads and Oviducts in Hatchlings and Young of Chelydra serpentina Resulting from Three Incubation Temperatures. Jour. Morphol. 167: 297-304.
YNTEMA, C.L. & N. MROSOVSKY . 1980. Sexual Differentiation in Loggerheads (Caretta caretta) Incubated at Different Controlled Temperatures. Herpetologica 36 (1): 33-36.

Datas de Publicação

Publicação nesta coleção
10 Jul 2009
Data do Fascículo
Mar 1999

Histórico

Aceito
25 Jan 1999
Recebido
27 Jun 1997

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] ALHO, C.J.R.; T.M.S. DANNI & L.F.M. PÁDUA. 1985. Temperature-dependent Sex Determination in Podocnemis expansa (Testudinata: Pelomedusidae). Biotropica 17 (1): 75-78.

[2] ASHLEY, L.M. 1955. Laboratory Anatomy of the Turtle. Iowa, WM. C. Brown Company. 48p.

[3] BULL, J.J. & R.C. VOGT. 1979. Temperature-dependent Sex Determination in Turtles. Science 206: 1186-1188.

[4] CAGLE, F.R. 1946. The Growth of the Slider Turtle, Pseudemys scripta elegans. Amer. Midland Nat. 36: 685-729.

[5] DANNI, T.M.S. & C.J.R. ALHO. 1985. Estudo Histológico da Diferenciação Sexual em Tartarugas Recém-Eclodidas (Podocnemis expansa, Pelomedusidae). Rev. Brasil. Biol. 45 (3): 365-368.

[6] MEDEM, F. 1976. Recomendaciones Respecto a Contar el Escamado y Tomar las Dimensiones de Nidos, Huevos y Ejemplares de los Crocodylia y Testudines. Lozania 20: 1-17.

[7] MILLER, J.D. & C.J. LIMPUS. 1981. Incubation period and sexual differentiation in the green turtle Chelonia mydas L. Melburne Herpetological Symposioum, Victoria, 1980, p. 66-73. In:C.B. BANKS & A.A. MARTIN (Ed.). Proceedings of Melburne Herpetological Symposioum, Victoria.

[8] MROSOVSKY, N. & M.H. GODFREY. 1995. Manipulating Sex Ratios: Turtles Speed Ahead! Chelonian Conservation and Biology 1 (3): 238-240.

[9] NOBLE, G.A. & E.R. NOBLE. 1940. A brief anatomy of the turtle. California, Standford University Press. 46p.

[10] PRITCHARD, P.C.H. & P. TREBBAU. 1984. The Turtles of Venezuela. Caracas, Society for the Study of Amphibians and Reptiles, 403p.

[11] RISLEY, P.L. 1933. Contributions on the Development of the Reproductive System in the Musk Turtle, Sternotherus odoratus (Latreille). II. Gonadogenesis and Sex Differentiation. Zeitschrift für Zellforschung und mikroskopische Anatomie 18: 493-543.

[12] RHODIN, A.G.J. & R.A. MITTERMEIER. 1976. Chelodina parkeri, A New Species of Chelid Turtle from New Guinea, with a Discussion of Chelodina siebenrocki Werner, 1901. Bull. Mus. Comp. Zool., Harvard, 147 (11): 465-488.

[13] SILVA, F. de A. 1986. La Temperatura Como Factor Determinante de Diferenciación sexual en Lepidochelys olivacea (Tortuga Golfina). Tiempos de Ciência 2: 17-20.

[14] STANDORA, E.A. & J.R. SPOTILA. 1985. Temperature Dependent Sex Determination in Sea Turtles. Copeia 1985 (3): 711-722.

[15] VAN DER HEIDEN, A.M.; R. BRISEÑO-DUEÑAS & D. RIOS-OLMEDA. 1985. A Simplified Method for Determination Sex in Hatchling Sea Turtles. Copeia 1985(3): 779-782.

[16] VOGT, R.C. 1994. Temperature Controlled Sex Determination as a Tool for Turtle Conversation. Chelonian Conservation and Biology 1 (2): 159-162.

[17] WHITMORE, C; P. DUTTON & M. MROSOVSKY. 1985. Sexing of Hatching Sea Turtles: Gross Appearance Versus Histology. Jour. Herpetol. 19 (3): 430-431.

[18] YNTEMA, C.L. 1976. Effects of Incubation Temperatures on Sexual Differentiation in the Turtle, Chelydra serpentina. Jour. Morphol. 150: 453-462.

[19] ______ . 1981. Characteristics of Gonads and Oviducts in Hatchlings and Young of Chelydra serpentina Resulting from Three Incubation Temperatures. Jour. Morphol. 167: 297-304.

[20] YNTEMA, C.L. & N. MROSOVSKY . 1980. Sexual Differentiation in Loggerheads (Caretta caretta) Incubated at Different Controlled Temperatures. Herpetologica 36 (1): 33-36.

Brasil

Brasil

Identificação sexual através do estudo anatômico do sistema urogenital em recém-eclodidos e jovens de Trachemys dorbignyi (Duméril & Bibron) (Reptilia, Testudines, Emydidae)

Sexual identification using anatomical study of urogenital system in hatchlings and juveniles of tracHemys dorbignyi (Duméril & Bibron) (Reptilia, Testudines, Emydidae)

Resumo

Datas de Publicação

Histórico