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Efeito do resfriamento do sêmen eqüino sobre sua congelabilidade

Authors: Fürst, R.; Carvalho, G.R.; Fürst, M.C.O.; Ruas, J.R.M.; Borges, A.M.; Mafilli, V.;

Efeito do resfriamento do sêmen eqüino sobre sua congelabilidade

Abstract

Utilizaram-se 25 ejaculados de cinco garanhões da raça Mangalarga Marchador, para avaliar dois protocolos de congelamento. No primeiro tratamento, resfriou-se o sêmen até 5ºC (curva de resfriamento - CR) antes do congelamento, no segundo, congelou-se o sêmen sem resfriamento (SC). Compararam-se duas formas de descongelamento, a 37ºC e a 75ºC/sete segundos. Os protocolos foram avaliados pelo teste de termo resistência (TTR - motilidade total e vigor) e pela funcionalidade da membrana plasmática (teste hiposmótico e eosina nigrosina). A motilidade total no tempo zero do TTR foi melhor (P<0,05) para o sêmen do tratamento CR, quando comparado com o do SC, em ambas as temperaturas de descongelamento, respectivamente, 46,7% e 21,0% (descongelamento a 37ºC), e 44,2% e 24,6% (descongelamento a 75ºC). Na mesma ordem, o número de espermatozóides vivos foi maior (P<0,05) no tratamento CR, 71,0% e 54,6% (descongelamento a 37ºC), e 77,4% e 54,1% (descongelamento a 75ºC). O sêmen do tratamento CR apresentou maior reação (P<0,05) ao teste hiposmótico e maior vigor (P<0,05) que o do SC. O sêmen descongelado a 75ºC apresentou melhor vigor (P<0,05) que o descongelado a 37ºC, independentemente do protocolo de congelamento. Os resultados mostraram, in vitro, o efeito benéfico do resfriamento do sêmen antes do congelamento.

Keywords

freezing protocol, thawing protocol, semen quality, protocolo de congelamento, sêmen, semen, eqüino, equine

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
14
Average
Top 10%
Average
Green
gold