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Oliveira, Jhonnatha Paulo, 1983- Din?mica folicular e fluxo sangu?neo ovariano e uterino em ?guas mangalarga marchador em condi??es de sombra e insola??o / Follicular dynamics and Ovarian and Uterine Blood Flow in Mangalarga Marchador Mares on shadow and sunny

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Previous issue date: 2016-11-05 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / This work was made in the municipality of Serop?dica - RJ during the breeding season of 2013/2014. The aim of this research was to evaluate the effects of environmental stress on the estrous cycle and ovarian and uterine blood perfusion in Mangalarga Marchador mares. We evaluated four consecutive estrous cycles of 16 mares divided in two groups: GI - mares kept on the shadow and GII - mares kept on the sun (n = 8 GI / GII), each cycle, mares were exchanged that all group animals the same variations were submitted. We evaluated 52 estrous cycles distributed in CI and CII (28 cycles: GI n = 14 and GII n = 14) CIII and CIV (24 GI n14 cycles and GII n = 10), CI and CII natural cycles, and CIII and CIV cycles with induced estrus. A estrus length of the estrous cycle estrus and diestrus, and the main events of foliculogenesis and ovarian and uterine blood perfusion through pulsatility an resistivity index (PI) and (RI) of the ovarian and uterus artery that were compared between groups. We evaluated the vital parameters: heart rate (HR), respiratory rate (RR) and rectal temperature (RT) to obtain bioclimatic indexes: Adaptability coefficient (CA) and heat tolerance Index (CTC). The thermal environment was characterized by Temeperatura wet globe Index (WBGT). The WBGT obtained allowed to conclude that the climatic conditions during the experimental period remained 71% of the days out of thermal comfort range ( ?79 WBGT value ) as well as physiological parameters FC , FR and TR , and bioclimatic indexes CA and CTC , which were higher in GII than in GI ( p < 0.05). There was no variation in the length of the estrous cycle , estrus or diestrus between groups ( p> 0.05). In phase I of the research, the follicular deviation occurred 1,7 days before in GII compared to GI (p < 0.05) , in phase II, the diameter of the second greater folicle on divergence was higher in GII than GI ( p < 0.05). In phase II, during the late diestrus ( D6 , 7, 8 and 9) , the second largest follicle had a greater diameter in GII compared to GI (p < 0.05). The diameter of the six largest follicles did not differ between the experimental groups at D -1 and D0 in both phases of the study. The mean values of PI and RI of the dominant ovarian and uterine arteries did not differ between groups in estrus or diestrus in both phases of the study and did not differ between groups at D -1 and D0 . In phase I, the ovarian artery PI was lower on GII compared to GI (p < 0.05). while WBGT was > 79 but the ovarian artery RI was lower in GII than GI, but only when the WBGT was > 84, which was not repeated in phase 2 of the research. Uterine artery RI and PI did not differ between the experimental groups in both phases of the study . It is concluded that thermal discomfort occurred and that it was higher in GII than GI . The group under sun showed be later in divergence and diameter of the second largest follicle at the end of estrus. when WBGT increased, the PI and RI of the dominant ovarian artery values reduced / A pesquisa foi conduzida no munic?pio de Serop?dica RJ na esta??o de monta de 2013/2014 e teve por objetivo avaliar os efeitos do estresse clim?tico sobre a o ciclo estral, foliculog?nese e perfus?o sangu?nea e ovariana e uterina de ?guas Mangalarga Marchador. Avaliou-se 4 ciclos estrais consecutivos de 16 ?guas distribu?das em dois grupos: GI ? ?guas ? sombra e GII ? ?guas em insola??o. A cada ciclo as ?guas foram trocadas de grupo. Foram avaliados 52 ciclos estrais distribu?dos em CI, CII (28 ciclos: GI n=14 e GII n=14), CIII e CIV (24 ciclos GI=n14 e GII n=10), sendo CI e CII ciclos naturais (Fase I), e CIII e CIV ciclos com estro induzido com PGF2? (Fase II). Avaliou-se a dura??o do ciclo estral, do estro e diestro, os principais eventos da foliculogenese e a perfus?o sangu?nea das art?rias ovariana e uterina dominantes atrav?s dos ?ndices de pulsatilidade (PI) e resistividade (RI). Avaliram-se os par?metros vitais frequ?ncia card?aca (FC), frequ?ncia respirat?ria (FR) e temperatura retal (TR) para obten??o de ?ndices bioclim?ticos: Coeficiente de Adaptabilidade (CA) e coeficiente de Toler?ncia ao Calor (CTC). O ambiente t?rmico foi caracterizado atrav?s do Indice de Temperatura do Globo ?mido (ITGU). O ITGU obtido permitiu inferir que as condi??es clim?ticas durante o per?odo experimental permaneceram 71% dos dias fora da faixa de conforto t?rmico (ITGU de valor ?79) assim como os par?metros fisiol?gicos FC, FR e TR, e os ?ndices bioclim?ticos CA e CTC, que apresentaram maiores valores no GII que em GI(p<0,05). N?o houve varia??o na dura??o do ciclo estral, do estro ou do diestro entre grupos (p>0,05). Na fase I do experimento, a diverg?ncia folicular ocorreu 1,7 dias antes no GII em rela??o a GI (p<0,05), na fase II o di?metro do segundo maior fol?culo na diverg?ncia foi maior no GII que em GI (p<0,05). Na fase II, durante o final do diestro (D6, 7, 8 e 9), o segundo maior fol?culo teve um di?metro maior no GII em rela??o a GI (p<0,05). O di?metro dos seis maiores fol?culos n?o diferiram entre os grupos experimentais no D-1 e D0, em ambas as fases da pesquisa. Os valores m?dios do PI e do RI das art?rias ovariana e uterina dominantes, n?o variaram entre grupos no estro ou no diestro em ambas as fases da pesquisa, bem como n?o variaram entre grupos em D-1 e D0 ou D6. Na fase I da pesquisa o PI da art?ria ovariana foi menor em GII em rela??o a GI (p<0,05) quando o ITGU foi >79, enquanto o RI da art?ria ovariana foi menor em GII que em GI somente quando o ITGU foi > 84, o que n?o se repetiu na fase II da pesquisa. O RI e o PI da art?ria uterina n?o variou entre grupos experimentais em ambas as fases da pesquisa em rela??o ao ITGU. Conclui-se que ocorreu desconforto t?rmico e que o mesmo foi maior em GII que em GI. O grupo sobre insol??o apresentou um diverg?ncia mais tardia e diferen?a no di?metro dos segundo maior fol?culo ao final do diestro, e que a mediada que o ITGU aumentou reduziu-se os valores de PI e RI da art?ria ovariana dominante.

Identiferoai:union.ndltd.org:IBICT/oai:localhost:jspui/1466
Date05 November 2016
CreatorsOliveira, Jhonnatha Paulo
ContributorsJacob, JUlio C?sar Ferraz, Silva , Luciano Andrade, Brand?o, Felipe Zandonadi, Jesus, Vera l?cia Teixeira de, Mello, Marco Roberto Bourg de
PublisherUniversidade Federal Rural do Rio de Janeiro, Programa de P?s-Gradua??o em Medicina Veterin?ria (Patologia e Ci?ncias Cl?nicas), UFRRJ, Brasil, Instituto de Zootecnia
Source SetsIBICT Brazilian ETDs
LanguagePortuguese
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis
Formatapplication/pdf
Sourcereponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ
Rightsinfo:eu-repo/semantics/openAccess
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