Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco

Detalhes bibliográficos
Autor(a) principal: BELTRÃO, Luciana de Barros Carvalho
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRPE
Texto Completo: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6834
Resumo: Ovine are characterized as seasonal poliestrous animals, where reproductive activity is intensified in certain times of the year, with interdependence of a greater or lesser exposure to sunlight or photoperiod. Although sperm production of rams stay stead the whole year, it is well known that there is a drop of seminal quality during the period of non-reproductive breeding season mainly in temperate regions where such photoperiod effect is punctual. However, few studies have been devoted to the influence of photoperiod on reproduction of sheep in tropical regions where variability of photoperiod is shorter. The objective of this experiment was to test the effectiveness of exogenous melatonin on seminal quality improvement in hair sheep at Agreste Meridional Region of Pernambuco State. Eight Santa Inês hair sheep were divided into 2 groups of 4 animals, a treatment group (TG), subjected to exogenous melatonin subcutaneous implants (Melovine ®, CEVA), and a control group (CG) subjected to subcutaneous application of 1 mL of saline as a placebo. Both groups were kept in barns with a mean luminosityof 11.26 hrs/day, for 120 days. During this period, it was evaluated the effect of exogenous melatonin on scrotal circumference, sperm concentration and serum concentrations of testosterone and melatonin by nightly and morning blood sample collections to establish influence in the concentrations of these hormones, correlating with the effect of seasonality. Data were compared using analysis of variance (ANOVA). The contrasts between means were evaluated through Student-Newman-Keuls test. There was a significant increase in serum concentration of melatonin in TG compared to CG, on the first 3 morning and evening collections (p < 0.05). No differences were observed in the 2 latest. Serum concentration of melatonin has demonstrated a night/day rhythm characteristic in both TG and CG groups with a difference in the mean concentration ofCG melatonin in the morning (3.9 pg/mL) compared with the night sample (59.56 pg/mL), however, this difference was not observed in TG (572.45 pg/mL vs 939.52 pg/mL). An increased serum concentration of melatonin was directly proportional to the increase in scrotal circumference. Also, a significant increase was observed in sperm concentration in TG 45 days after the placement of implants. Serum testosterone concentration increased significantly in TG 45 days after placement of the implants when it began a decline in concentration of melatonin. The results of this study demonstrated that treatment with exogenous melatonin in hair sheep at tropical region had a positive effect on scrotal circumference, on sperm concentration and on serum testosterone concentration suggesting that even in tropical regions where there is not a marked difference in photoperiod, melatonin plays a role in the reproductive processes.
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spelling CARNEIRO, Gustavo FerrerBARTOLOMEU, Cláudio CoutinhoPINHEIRO JUNIOR, José WiltonARAÚJO, Norma Lúcia de Souzahttp://lattes.cnpq.br/7101457730663536BELTRÃO, Luciana de Barros Carvalho2017-05-05T15:17:26Z2013-10-04BELTRÃO, Luciana de Barros Carvalho. Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco. 2013. 80 f. Dissertação (Programa de Pós-Graduação em Sanidade e Reprodução de Ruminantes) - Universidade Federal Rural de Pernambuco, Garanhuns.http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6834Ovine are characterized as seasonal poliestrous animals, where reproductive activity is intensified in certain times of the year, with interdependence of a greater or lesser exposure to sunlight or photoperiod. Although sperm production of rams stay stead the whole year, it is well known that there is a drop of seminal quality during the period of non-reproductive breeding season mainly in temperate regions where such photoperiod effect is punctual. However, few studies have been devoted to the influence of photoperiod on reproduction of sheep in tropical regions where variability of photoperiod is shorter. The objective of this experiment was to test the effectiveness of exogenous melatonin on seminal quality improvement in hair sheep at Agreste Meridional Region of Pernambuco State. Eight Santa Inês hair sheep were divided into 2 groups of 4 animals, a treatment group (TG), subjected to exogenous melatonin subcutaneous implants (Melovine ®, CEVA), and a control group (CG) subjected to subcutaneous application of 1 mL of saline as a placebo. Both groups were kept in barns with a mean luminosityof 11.26 hrs/day, for 120 days. During this period, it was evaluated the effect of exogenous melatonin on scrotal circumference, sperm concentration and serum concentrations of testosterone and melatonin by nightly and morning blood sample collections to establish influence in the concentrations of these hormones, correlating with the effect of seasonality. Data were compared using analysis of variance (ANOVA). The contrasts between means were evaluated through Student-Newman-Keuls test. There was a significant increase in serum concentration of melatonin in TG compared to CG, on the first 3 morning and evening collections (p < 0.05). No differences were observed in the 2 latest. Serum concentration of melatonin has demonstrated a night/day rhythm characteristic in both TG and CG groups with a difference in the mean concentration ofCG melatonin in the morning (3.9 pg/mL) compared with the night sample (59.56 pg/mL), however, this difference was not observed in TG (572.45 pg/mL vs 939.52 pg/mL). An increased serum concentration of melatonin was directly proportional to the increase in scrotal circumference. Also, a significant increase was observed in sperm concentration in TG 45 days after the placement of implants. Serum testosterone concentration increased significantly in TG 45 days after placement of the implants when it began a decline in concentration of melatonin. The results of this study demonstrated that treatment with exogenous melatonin in hair sheep at tropical region had a positive effect on scrotal circumference, on sperm concentration and on serum testosterone concentration suggesting that even in tropical regions where there is not a marked difference in photoperiod, melatonin plays a role in the reproductive processes.Ovinos são caracterizados como animais poliéstricos estacionais, onde a atividade reprodutiva está intensificada em determinadas épocas do ano, com interdependência de uma maior ou menor exposição à luz solar ou fotoperíodo. Apesar da produção espermática de carneiros se manter por todo ano, é sabido que há uma queda da qualidade seminal durante o período de estação não reprodutiva principalmente em regiões de clima temperado onde esse efeito do fotoperíodo é pontual. Entretanto, poucos estudos têm se dedicado à influência do fotoperíodo na reprodução de ovinos em regiões de clima tropical onde a variabilidade do fotoperíodo é menor. O objetivo deste experimento foi testar a eficácia do uso de melatonina exógena na melhoria da qualidade seminal em carneiros deslanados no Agreste Meridional do Estado de Pernambuco. Oito carneiros da raça Santa Inês foram divididos em 2 grupos de 4 animais, um grupo tratamento (GT), submetidos a implantes subcutâneos de melatonina exógena (Melovine®, CEVA), e um grupo controle (GC) , submetidos a solução salina 1 mL (placebo) subcutâneo, foram mantidos em apriscos com luminosidade média de 11h26’h/dia, por 120 dias. Durante esse período foi avaliado o efeito da melatonina exógena na circunferência escrotal, concentração espermática e concentrações séricas de testosterona e melatonina através de coletas quinzenais no horário matutino e vespertino para estabelecer a influência nas concentrações desses hormônios, correlacionando assim, com a ação da sazonalidade. Os dados foram comparados através de análise de variância (ANOVA). Os contrastes entre médias foram avaliados através do método de Student-Newman-Keuls. Houve um aumento significativo na concentração sérica de melatonina no GT comparado ao GC, nas 3 primeiras coletas matutina e vespertina (p<0.05). Nas 2 últimas coletas não foi observado diferenças. A concentração sérica de melatonina demonstrou um ritmo característico de noite/dia em ambos grupos GT e GC com diferença significativa na concentração média no GC da melatonina na manhã (3.9 pg/mL) comparado com a amostra da noite (59.56 pg/mL), entretanto, essa diferença não foi observada no GT (572.45 pg/mL vs 939.52 pg/mL). O aumento da concentração sérica de melatonina foi diretamente proporcional ao aumento da circunferência escrotal. Foi observado ainda, aumento significativo na concentração espermática no GT 45 dias após a colocação dos implantes. A concentração de testosterona sérica aumentou significativamente no GT 45 dias após a colocação dos implantes quando iniciou uma queda na concentração de melatonina. Os resultados deste trabalho demonstraram que o tratamento com melatonina exógena em carneiros deslanados em região tropical teve um efeito positivo no aumento da circunferência escrotal, no aumento da concentração espermática e no aumento da concentração sérica de testosterona sugerindo que mesmo em regiões tropicais onde não há uma diferença marcante de fotoperíodo, a melatonina participa ativamente dos processos reprodutivos.Submitted by Mario BC (mario@bc.ufrpe.br) on 2017-05-05T15:17:26Z No. of bitstreams: 1 Luciana de Barros Carvalho Beltrao.pdf: 2236019 bytes, checksum: 93191d79c75ec90a537294288eba2d9d (MD5)Made available in DSpace on 2017-05-05T15:17:26Z (GMT). No. of bitstreams: 1 Luciana de Barros Carvalho Beltrao.pdf: 2236019 bytes, checksum: 93191d79c75ec90a537294288eba2d9d (MD5) Previous issue date: 2013-10-04application/pdfporUniversidade Federal Rural de PernambucoPrograma de Pós-Graduação em Sanidade e Reprodução de RuminantesUFRPEBrasilUnidade Acadêmica de GaranhunsMelatoninaReprodução animalSêmenOvinoFotoperíodoMelatoninAnimal reproductionPhotoperiodSheepMEDICINA VETERINARIA::REPRODUCAO ANIMALEfeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambucoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis449183956091688623960060060077205141824112794111098345750696262412info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UFRPEinstname:Universidade Federal Rural de Pernambuco (UFRPE)instacron:UFRPELICENSElicense.txtlicense.txttext/plain; charset=utf-82165http://www.tede2.ufrpe.br:8080/tede2/bitstream/tede2/6834/1/license.txtbd3efa91386c1718a7f26a329fdcb468MD51ORIGINALLuciana de Barros Carvalho Beltrao.pdfLuciana de Barros Carvalho Beltrao.pdfapplication/pdf2236019http://www.tede2.ufrpe.br:8080/tede2/bitstream/tede2/6834/2/Luciana+de+Barros+Carvalho+Beltrao.pdf93191d79c75ec90a537294288eba2d9dMD52tede2/68342017-05-05 12:17:26.446oai:tede2: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Biblioteca Digital de Teses e Dissertaçõeshttp://www.tede2.ufrpe.br:8080/tede/PUBhttp://www.tede2.ufrpe.br:8080/oai/requestbdtd@ufrpe.br ||bdtd@ufrpe.bropendoar:2024-05-28T12:34:51.874597Biblioteca Digital de Teses e Dissertações da UFRPE - Universidade Federal Rural de Pernambuco (UFRPE)false
dc.title.por.fl_str_mv Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
title Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
spellingShingle Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
BELTRÃO, Luciana de Barros Carvalho
Melatonina
Reprodução animal
Sêmen
Ovino
Fotoperíodo
Melatonin
Animal reproduction
Photoperiod
Sheep
MEDICINA VETERINARIA::REPRODUCAO ANIMAL
title_short Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
title_full Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
title_fullStr Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
title_full_unstemmed Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
title_sort Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco
author BELTRÃO, Luciana de Barros Carvalho
author_facet BELTRÃO, Luciana de Barros Carvalho
author_role author
dc.contributor.advisor1.fl_str_mv CARNEIRO, Gustavo Ferrer
dc.contributor.referee1.fl_str_mv BARTOLOMEU, Cláudio Coutinho
dc.contributor.referee2.fl_str_mv PINHEIRO JUNIOR, José Wilton
dc.contributor.referee3.fl_str_mv ARAÚJO, Norma Lúcia de Souza
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/7101457730663536
dc.contributor.author.fl_str_mv BELTRÃO, Luciana de Barros Carvalho
contributor_str_mv CARNEIRO, Gustavo Ferrer
BARTOLOMEU, Cláudio Coutinho
PINHEIRO JUNIOR, José Wilton
ARAÚJO, Norma Lúcia de Souza
dc.subject.por.fl_str_mv Melatonina
Reprodução animal
Sêmen
Ovino
Fotoperíodo
topic Melatonina
Reprodução animal
Sêmen
Ovino
Fotoperíodo
Melatonin
Animal reproduction
Photoperiod
Sheep
MEDICINA VETERINARIA::REPRODUCAO ANIMAL
dc.subject.eng.fl_str_mv Melatonin
Animal reproduction
Photoperiod
Sheep
dc.subject.cnpq.fl_str_mv MEDICINA VETERINARIA::REPRODUCAO ANIMAL
description Ovine are characterized as seasonal poliestrous animals, where reproductive activity is intensified in certain times of the year, with interdependence of a greater or lesser exposure to sunlight or photoperiod. Although sperm production of rams stay stead the whole year, it is well known that there is a drop of seminal quality during the period of non-reproductive breeding season mainly in temperate regions where such photoperiod effect is punctual. However, few studies have been devoted to the influence of photoperiod on reproduction of sheep in tropical regions where variability of photoperiod is shorter. The objective of this experiment was to test the effectiveness of exogenous melatonin on seminal quality improvement in hair sheep at Agreste Meridional Region of Pernambuco State. Eight Santa Inês hair sheep were divided into 2 groups of 4 animals, a treatment group (TG), subjected to exogenous melatonin subcutaneous implants (Melovine ®, CEVA), and a control group (CG) subjected to subcutaneous application of 1 mL of saline as a placebo. Both groups were kept in barns with a mean luminosityof 11.26 hrs/day, for 120 days. During this period, it was evaluated the effect of exogenous melatonin on scrotal circumference, sperm concentration and serum concentrations of testosterone and melatonin by nightly and morning blood sample collections to establish influence in the concentrations of these hormones, correlating with the effect of seasonality. Data were compared using analysis of variance (ANOVA). The contrasts between means were evaluated through Student-Newman-Keuls test. There was a significant increase in serum concentration of melatonin in TG compared to CG, on the first 3 morning and evening collections (p < 0.05). No differences were observed in the 2 latest. Serum concentration of melatonin has demonstrated a night/day rhythm characteristic in both TG and CG groups with a difference in the mean concentration ofCG melatonin in the morning (3.9 pg/mL) compared with the night sample (59.56 pg/mL), however, this difference was not observed in TG (572.45 pg/mL vs 939.52 pg/mL). An increased serum concentration of melatonin was directly proportional to the increase in scrotal circumference. Also, a significant increase was observed in sperm concentration in TG 45 days after the placement of implants. Serum testosterone concentration increased significantly in TG 45 days after placement of the implants when it began a decline in concentration of melatonin. The results of this study demonstrated that treatment with exogenous melatonin in hair sheep at tropical region had a positive effect on scrotal circumference, on sperm concentration and on serum testosterone concentration suggesting that even in tropical regions where there is not a marked difference in photoperiod, melatonin plays a role in the reproductive processes.
publishDate 2013
dc.date.issued.fl_str_mv 2013-10-04
dc.date.accessioned.fl_str_mv 2017-05-05T15:17:26Z
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dc.identifier.citation.fl_str_mv BELTRÃO, Luciana de Barros Carvalho. Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco. 2013. 80 f. Dissertação (Programa de Pós-Graduação em Sanidade e Reprodução de Ruminantes) - Universidade Federal Rural de Pernambuco, Garanhuns.
dc.identifier.uri.fl_str_mv http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6834
identifier_str_mv BELTRÃO, Luciana de Barros Carvalho. Efeito da melatonina exógena sobre os aspectos reprodutivos em carneiros deslanados no agreste meridional do estado de Pernambuco. 2013. 80 f. Dissertação (Programa de Pós-Graduação em Sanidade e Reprodução de Ruminantes) - Universidade Federal Rural de Pernambuco, Garanhuns.
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dc.publisher.program.fl_str_mv Programa de Pós-Graduação em Sanidade e Reprodução de Ruminantes
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dc.publisher.department.fl_str_mv Unidade Acadêmica de Garanhuns
publisher.none.fl_str_mv Universidade Federal Rural de Pernambuco
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