Reproductive characteristics of captive male jaguars (Panthera onca)
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Veterinary Research and Animal Science |
Texto Completo: | https://www.revistas.usp.br/bjvras/article/view/5739 |
Resumo: | Ejaculate traits, testicular volume and plasma testosterone levels were determined once every two months for one year in 4 adult male jaguars (Panthera onca) housed at the São Paulo Zoo, SP, Brazil. Semen samples was collected by electroejaculation and analyzed for pH, total volume, motility (0-100%), status (0-5), total spermatozoa count and morphology. Blood samples was obtained by cephalic venipuncture immediately before the onset of electroejaculation and stored at -20ºC until assay of testosterone by RIA. Using a calliper, the length and width of each testis was measured and the values were combined to determine the testicular volume. Semen analyses demonstrated a high percentage of structurally abnormal sperm (mean = 51%) and low rates of motility (50.6%) and status (2.2). No correlation was found between semen traits, plasma testosterone and testicular volume (Spearmans test). No season variation was detected throughout the year for semen traits, plasma testosterone and testicular volume (p>;0.05, Friedmans test). The results of this study suggest that the captive jaguars in Brazil are not seasonal, and that semen collections can be performed throughout the year without a perturbation in overall ejaculate quality. However, underlying causes of high percentages of structurally abnormal sperm, found in captive jaguars, need to be investigated mainly to improve semen quality. |
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Brazilian Journal of Veterinary Research and Animal Science |
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Reproductive characteristics of captive male jaguars (Panthera onca)Características reprodutivas de onças-pintadas (Panthera onca) machos, mantidos em cativeiroJaguarCaracteristicas do semenTestosteronaSazonalidadeJaguarsSemen charactersTestosteroneSeasonEjaculate traits, testicular volume and plasma testosterone levels were determined once every two months for one year in 4 adult male jaguars (Panthera onca) housed at the São Paulo Zoo, SP, Brazil. Semen samples was collected by electroejaculation and analyzed for pH, total volume, motility (0-100%), status (0-5), total spermatozoa count and morphology. Blood samples was obtained by cephalic venipuncture immediately before the onset of electroejaculation and stored at -20ºC until assay of testosterone by RIA. Using a calliper, the length and width of each testis was measured and the values were combined to determine the testicular volume. Semen analyses demonstrated a high percentage of structurally abnormal sperm (mean = 51%) and low rates of motility (50.6%) and status (2.2). No correlation was found between semen traits, plasma testosterone and testicular volume (Spearmans test). No season variation was detected throughout the year for semen traits, plasma testosterone and testicular volume (p>;0.05, Friedmans test). The results of this study suggest that the captive jaguars in Brazil are not seasonal, and that semen collections can be performed throughout the year without a perturbation in overall ejaculate quality. However, underlying causes of high percentages of structurally abnormal sperm, found in captive jaguars, need to be investigated mainly to improve semen quality.Quatro onças pintadas (Panthera onca), machos, adultos, mantidos no Zoológico de São Paulo (SP-Brasil), foram submetidos a avaliação seminal, quantificação hormonal e biometria testicular a cada dois meses pelo período de um ano. As amostras de sêmen foram obtidas por eletroejaculação e analisadas quanto ao pH, volume total, motilidade (0-100%), vigor (0-5), espermatozóides totais e morfologia. Amostras de sangue foram obtidas pela punção da veia cefálica imediatamente antes da eletroejaculação e o plasma foi estocado a -20ºC até a realização do radioimunoensaio para quantificação de testosterona. Comprimento e largura dos testículos direito e esquerdo foram obtidos com auxílio de paquímetro e os valores obtidos foram combinados para a obtenção de volume testicular. As amostras de sêmen mostraram elevado índice de espermatozóides morfologicamente anormais (média = 51%), baixos índice de motilidade (50,6%) e vigor (2,2). Não foi encontrada correlação entre as características seminais, níveis plasmáticos de testosterona e volume testicular (Teste de Correlação de Spearman). Não foi detectado efeito da estação durante o ano para qualidade espermática, testosterona sérica e volume testicular (p>;0,05, Teste de Friedman). Os resultados sugerem que as onças pintadas mantidas em cativeiro não são sazonais e que a colheita e avaliação espermática podem ser realizadas em qualquer período do ano sem que haja perda na qualidade espermática. No entanto, as causas de elevado índice de espermatozóides morfologicamente anormais, encontrados neste estudo, devem ser investigadas.Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia1999-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/bjvras/article/view/573910.1590/S1413-95961999000500008Brazilian Journal of Veterinary Research and Animal Science; Vol. 36 Núm. 5 (1999); 262-266Brazilian Journal of Veterinary Research and Animal Science; Vol. 36 No. 5 (1999); 262-266Brazilian Journal of Veterinary Research and Animal Science; v. 36 n. 5 (1999); 262-266Brazilian Journal of Veterinary Research and Animal Science; V. 36 N. 5 (1999); 262-2661678-44561413-9596reponame:Brazilian Journal of Veterinary Research and Animal Scienceinstname:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)instacron:USPenghttps://www.revistas.usp.br/bjvras/article/view/5739/64802Morato, Ronaldo GonçalvesGuimarães, Marcelo Alcindo Barros de VazFerreira, FernandoVerreschi, Ieda Terezinha do NascimentoBarnabe, Renato Campanarutinfo:eu-repo/semantics/openAccess2020-06-23T04:44:13Zoai:revistas.usp.br:article/5739Revistahttps://www.revistas.usp.br/bjvrasPUBhttps://www.revistas.usp.br/bjvras/oaibjvras@usp.br1413-95961413-9596opendoar:https://www.revistas.usp.br/bjvras/index2023-01-12T16:42:19.968817Brazilian Journal of Veterinary Research and Animal Science - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)false |
dc.title.none.fl_str_mv |
Reproductive characteristics of captive male jaguars (Panthera onca) Características reprodutivas de onças-pintadas (Panthera onca) machos, mantidos em cativeiro |
title |
Reproductive characteristics of captive male jaguars (Panthera onca) |
spellingShingle |
Reproductive characteristics of captive male jaguars (Panthera onca) Morato, Ronaldo Gonçalves Jaguar Caracteristicas do semen Testosterona Sazonalidade Jaguars Semen characters Testosterone Season |
title_short |
Reproductive characteristics of captive male jaguars (Panthera onca) |
title_full |
Reproductive characteristics of captive male jaguars (Panthera onca) |
title_fullStr |
Reproductive characteristics of captive male jaguars (Panthera onca) |
title_full_unstemmed |
Reproductive characteristics of captive male jaguars (Panthera onca) |
title_sort |
Reproductive characteristics of captive male jaguars (Panthera onca) |
author |
Morato, Ronaldo Gonçalves |
author_facet |
Morato, Ronaldo Gonçalves Guimarães, Marcelo Alcindo Barros de Vaz Ferreira, Fernando Verreschi, Ieda Terezinha do Nascimento Barnabe, Renato Campanarut |
author_role |
author |
author2 |
Guimarães, Marcelo Alcindo Barros de Vaz Ferreira, Fernando Verreschi, Ieda Terezinha do Nascimento Barnabe, Renato Campanarut |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Morato, Ronaldo Gonçalves Guimarães, Marcelo Alcindo Barros de Vaz Ferreira, Fernando Verreschi, Ieda Terezinha do Nascimento Barnabe, Renato Campanarut |
dc.subject.por.fl_str_mv |
Jaguar Caracteristicas do semen Testosterona Sazonalidade Jaguars Semen characters Testosterone Season |
topic |
Jaguar Caracteristicas do semen Testosterona Sazonalidade Jaguars Semen characters Testosterone Season |
description |
Ejaculate traits, testicular volume and plasma testosterone levels were determined once every two months for one year in 4 adult male jaguars (Panthera onca) housed at the São Paulo Zoo, SP, Brazil. Semen samples was collected by electroejaculation and analyzed for pH, total volume, motility (0-100%), status (0-5), total spermatozoa count and morphology. Blood samples was obtained by cephalic venipuncture immediately before the onset of electroejaculation and stored at -20ºC until assay of testosterone by RIA. Using a calliper, the length and width of each testis was measured and the values were combined to determine the testicular volume. Semen analyses demonstrated a high percentage of structurally abnormal sperm (mean = 51%) and low rates of motility (50.6%) and status (2.2). No correlation was found between semen traits, plasma testosterone and testicular volume (Spearmans test). No season variation was detected throughout the year for semen traits, plasma testosterone and testicular volume (p>;0.05, Friedmans test). The results of this study suggest that the captive jaguars in Brazil are not seasonal, and that semen collections can be performed throughout the year without a perturbation in overall ejaculate quality. However, underlying causes of high percentages of structurally abnormal sperm, found in captive jaguars, need to be investigated mainly to improve semen quality. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-01-01 |
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/5739 10.1590/S1413-95961999000500008 |
url |
https://www.revistas.usp.br/bjvras/article/view/5739 |
identifier_str_mv |
10.1590/S1413-95961999000500008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/bjvras/article/view/5739/64802 |
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. 36 Núm. 5 (1999); 262-266 Brazilian Journal of Veterinary Research and Animal Science; Vol. 36 No. 5 (1999); 262-266 Brazilian Journal of Veterinary Research and Animal Science; v. 36 n. 5 (1999); 262-266 Brazilian Journal of Veterinary Research and Animal Science; V. 36 N. 5 (1999); 262-266 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_ |
1797051554661924864 |