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Efeitos de diferentes fontes de energia sobre taxa ovulatória, fertilidade e sobrevivência embrionária em marrãs cíclicas

Authors: Machado, G.S.; Fontes, D.O.; Almeida, F.R.C.L.; Borges, A.L.C.C.; Silva, M.A.; Oliveira, V.F.; Silva, T.C.T.;

Efeitos de diferentes fontes de energia sobre taxa ovulatória, fertilidade e sobrevivência embrionária em marrãs cíclicas

Abstract

Cinqüenta e quatro marrãs cíclicas, uniformizadas quanto à linhagem, família, ganho de peso, espessura de toucinho, peso, precocidade sexual, número de cios e escore clínico, foram alocadas em dois grupos experimentais com dietas isocalóricas, isoprotéicas e isolisínicas. Duas fontes de energia foram testadas: amido de milho (T1) e óleo de soja (T2). Sincronizou-se o segundo estro com allyl-trenbolone, para inseminação no terceiro estro. Foi realizada cateterização não cirúrgica em 21 marrãs, submetidas a dois ciclos de coleta para dosagem de glicose e insulina, aos 14 e 21 dias do ciclo. Todas as marrãs foram abatidas aos 28,6 dias de gestação média, para análises biométricas do trato reprodutivo. Marrãs do T1 apresentaram maior taxa ovulatória em relação às do T2 (16,52 vs 14,70, P<0,01). Não houve diferença entre os tratamentos nas taxas de prenhez e sobrevivência embrionária. É possível alterar a eficiência reprodutiva por intermédio de manipulação dietética, mesmo em marrãs em estado anabólico. O uso do amido de milho na fase pré-cobertua melhorou a eficiência reprodutiva dos animais avaliados.

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Keywords

insulin, energia, flushing, marrãs, gilts, insulina, energy

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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!
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