Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity

The testicular development in 31 Agoutis, of the Dasyprocta aguti species, from the birth up to 14 months of age was studied through the histometric analysis. Mid diameter and the mean area, in each testicle, were obtained through 30 crosscuts of the funiculus and/or the seminiferous tubule, by mean...

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Autores: Assis-Neto, Antônio Chaves de, Melo, Maria Isabel Vaz de, Carvalho, Maria Acelina Martins de, Miglino, Maria Angélica, Oliveira, Moacir Franco de
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2003
País:Brasil
Institución:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)
Repositorio:Brazilian Journal of Veterinary Research and Animal Science
Idioma:portugués
OAI Identifier:oai:revistas.usp.br:article/11355
Acceso en línea:https://www.revistas.usp.br/bjvras/article/view/11355
Access Level:acceso abierto
Palabra clave:Cutia
Desenvolvimento pós-natal
Histometria
Testículo
Túbulo seminífero
Agouti
Postnatal development
Histometry
Testis
Seminiferous tubule
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dc.title.none.fl_str_mv Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
Análise histométrica do desenvolvimento testicular de cutias (Dasyprocta aguti) criadas em cativeiros
title Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
spellingShingle Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
Assis-Neto, Antônio Chaves de
Cutia
Desenvolvimento pós-natal
Histometria
Testículo
Túbulo seminífero
Agouti
Postnatal development
Histometry
Testis
Seminiferous tubule
title_short Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
title_full Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
title_fullStr Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
title_full_unstemmed Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
title_sort Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivity
dc.creator.none.fl_str_mv Assis-Neto, Antônio Chaves de
Melo, Maria Isabel Vaz de
Carvalho, Maria Acelina Martins de
Miglino, Maria Angélica
Oliveira, Moacir Franco de
author Assis-Neto, Antônio Chaves de
author_facet Assis-Neto, Antônio Chaves de
Melo, Maria Isabel Vaz de
Carvalho, Maria Acelina Martins de
Miglino, Maria Angélica
Oliveira, Moacir Franco de
author_role author
author2 Melo, Maria Isabel Vaz de
Carvalho, Maria Acelina Martins de
Miglino, Maria Angélica
Oliveira, Moacir Franco de
author2_role author
author
author
author
dc.subject.por.fl_str_mv Cutia
Desenvolvimento pós-natal
Histometria
Testículo
Túbulo seminífero
Agouti
Postnatal development
Histometry
Testis
Seminiferous tubule
topic Cutia
Desenvolvimento pós-natal
Histometria
Testículo
Túbulo seminífero
Agouti
Postnatal development
Histometry
Testis
Seminiferous tubule
description The testicular development in 31 Agoutis, of the Dasyprocta aguti species, from the birth up to 14 months of age was studied through the histometric analysis. Mid diameter and the mean area, in each testicle, were obtained through 30 crosscuts of the funiculus and/or the seminiferous tubule, by means of a computerized system for image analysis and a Zeiss CPL 10X ocular micrometric device, coupled to an objective lens of 40X. Testicles volume proportions were obtained through the stereometric method, according to Elias, Henning and Schwartz¹. Tubule medium diameter presented a slow growth from the birth to the eight months of age, for both used methodologies. When the ocular micrometric device was used it was observed that, beginning in the ninth month, the tubule diameter had an accelerated growth getting to duplicate its value if compared with the preceded age group. The volume proportion of the testicle cord and the seminiferous tubule grew gradually, reaching its maximum value (86,50%) on the ninth month. The Leydig cells presented a decreasing volume proportion, and their largest values were expressive from the birth up to four months of age (7,00 ± 1,77% to 9,55 ± 0,64%) and a minimum value, starting from nine months, still tending to stabilize. The stroma decreased with the development of age and fall abruptly when the puberty starts. It is concluded that the diameter of the testicles cords and seminiferous tubule presented a larger growth coinciding with the start of puberty and the volume proportion of the Leydig cells was lower in the same period.
publishDate 2003
dc.date.none.fl_str_mv 2003-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/bjvras/article/view/11355
10.1590/S1413-95962003000300007
url https://www.revistas.usp.br/bjvras/article/view/11355
identifier_str_mv 10.1590/S1413-95962003000300007
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://www.revistas.usp.br/bjvras/article/view/11355/13123
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia
dc.source.none.fl_str_mv Brazilian Journal of Veterinary Research and Animal Science; Vol. 40 Núm. 3 (2003); 202-208
Brazilian Journal of Veterinary Research and Animal Science; Vol. 40 No. 3 (2003); 202-208
Brazilian Journal of Veterinary Research and Animal Science; v. 40 n. 3 (2003); 202-208
Brazilian Journal of Veterinary Research and Animal Science; V. 40 N. 3 (2003); 202-208
1678-4456
1413-9596
reponame:Brazilian Journal of Veterinary Research and Animal Science
instname:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)
instacron:USP
instname_str Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)
instacron_str USP
institution USP
reponame_str Brazilian Journal of Veterinary Research and Animal Science
collection Brazilian Journal of Veterinary Research and Animal Science
repository.name.fl_str_mv Brazilian Journal of Veterinary Research and Animal Science - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)
repository.mail.fl_str_mv bjvras@usp.br
_version_ 1853662136383832064
spelling Histometric analysis of testis development in agoutis (Dasyprocta aguti) raised in captivityAnálise histométrica do desenvolvimento testicular de cutias (Dasyprocta aguti) criadas em cativeirosCutiaDesenvolvimento pós-natalHistometriaTestículoTúbulo seminíferoAgoutiPostnatal developmentHistometryTestisSeminiferous tubuleThe testicular development in 31 Agoutis, of the Dasyprocta aguti species, from the birth up to 14 months of age was studied through the histometric analysis. Mid diameter and the mean area, in each testicle, were obtained through 30 crosscuts of the funiculus and/or the seminiferous tubule, by means of a computerized system for image analysis and a Zeiss CPL 10X ocular micrometric device, coupled to an objective lens of 40X. Testicles volume proportions were obtained through the stereometric method, according to Elias, Henning and Schwartz¹. Tubule medium diameter presented a slow growth from the birth to the eight months of age, for both used methodologies. When the ocular micrometric device was used it was observed that, beginning in the ninth month, the tubule diameter had an accelerated growth getting to duplicate its value if compared with the preceded age group. The volume proportion of the testicle cord and the seminiferous tubule grew gradually, reaching its maximum value (86,50%) on the ninth month. The Leydig cells presented a decreasing volume proportion, and their largest values were expressive from the birth up to four months of age (7,00 ± 1,77% to 9,55 ± 0,64%) and a minimum value, starting from nine months, still tending to stabilize. The stroma decreased with the development of age and fall abruptly when the puberty starts. It is concluded that the diameter of the testicles cords and seminiferous tubule presented a larger growth coinciding with the start of puberty and the volume proportion of the Leydig cells was lower in the same period.Foi estudado, por meio da histometria, o desenvolvimento testicular em 31 cutias da espécie Dasyprocta aguti desde o nascimento até 14 meses de idade. O diâmetro e a área, médios, foram obtidos a partir de 30 secções transversais de cordões e/ou túbulos seminíferos, em cada testículo, utilizando-se sistema de computadorizado de analises de imagem e uma ocular micrométrica Zeiss CPL 10X, acoplada a uma objetiva de 40X. As proporções volumétricas do testículo foram obtidas com o método estereométrico, segundo Elias, Henning e Schwartz¹. O diâmetro tubular médio apresentou crescimento lento desde o nascimento até os oito meses de idade, nas duas metodologias empregadas. Quando foi usada a ocular micrométrica observou-se que, a partir de nove meses, o diâmetro tubular teve um crescimento acelerado, chegando a duplicar o seu valor, se comparado com grupo etário que o antecedia. A proporção volumétrica dos cordões testiculares e túbulos seminíferos cresceu gradualmente, atingindo, aos nove meses, seu valor máximo (86,50%). As células de Leydig apresentaram proporção volumétrica decrescente, e seus maiores valores foram expressivos do nascimento até quatro meses de idade (7,00 ± 1,77% a 9,55 ± 0,64%) e mínimos a partir de nove meses, tendendo ainda a uma estabilização. O estroma diminuiu com a evolução da idade caindo bruscamente a partir da puberdade. Conclui-se que o diâmetro dos cordões testiculares e túbulos seminíferos apresentou maior crescimento, coincidindo com o início da puberdade e a proporção volumétrica das células de Leydig encontrou-se, respectivamente, mais alta e mais baixa no mesmo período.Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia2003-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/bjvras/article/view/1135510.1590/S1413-95962003000300007Brazilian Journal of Veterinary Research and Animal Science; Vol. 40 Núm. 3 (2003); 202-208Brazilian Journal of Veterinary Research and Animal Science; Vol. 40 No. 3 (2003); 202-208Brazilian Journal of Veterinary Research and Animal Science; v. 40 n. 3 (2003); 202-208Brazilian Journal of Veterinary Research and Animal Science; V. 40 N. 3 (2003); 202-2081678-44561413-9596reponame:Brazilian Journal of Veterinary Research and Animal Scienceinstname:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)instacron:USPporhttps://www.revistas.usp.br/bjvras/article/view/11355/13123info:eu-repo/semantics/openAccessAssis-Neto, Antônio Chaves deMelo, Maria Isabel Vaz deCarvalho, Maria Acelina Martins deMiglino, Maria AngélicaOliveira, Moacir Franco de2020-06-23T04:34:48Zoai:revistas.usp.br:article/11355Revistahttps://www.revistas.usp.br/bjvrasPUBhttps://www.revistas.usp.br/bjvras/oaibjvras@usp.br1413-95961413-9596opendoar:https://www.revistas.usp.br/bjvras/index2023-01-12T16:42:39.331985Brazilian Journal of Veterinary Research and Animal Science - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)false
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