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Boletim de Indústria Animal
Article . 2015
Data sources: DOAJ
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Desempenho reprodutivo usando distâncias diferentes para o pré-condicionamento do efeito macho em caprinos durante dois períodos climáticos distintos

Authors: Carlos Geraldo Tenório Alves; José Carlos Ferreira-Silva; José Monteiro Almeida-Irmão; Marcelo Tigre Moura; Claúdio Coutinho Bartolomeu; Paulo Fernandes Lima; Marcos Antonio Lemos de Oliveira;

Desempenho reprodutivo usando distâncias diferentes para o pré-condicionamento do efeito macho em caprinos durante dois períodos climáticos distintos

Abstract

The objective of the present study was to determine if separation distance between bucks and does during two distinct climate seasons could affect the reproductive performance of goats subjected to a 45-day mating season (MS). Anglo Nubian does (n = 120) were kept apart from bucks at distances of 2 m (T1), 300 m (T2), and 2000 m (T3) for 60 days prior to the 45-day MS during two distinct climate seasons [dry season (DS, February to March) and rainy season (RS, September to October)] in Sertânia, Pernambuco state, Brazil. There were no effects of distance of separation between bucks and does in any response variable evaluated. However, during the DS, the mean of the first estrous manifestation varied significantly (P>0.05) between groups [7.13±4.49 (T1), 8.84±5.64 (T2), and 6.37±4.21 (T3) days] and during the RS [7.33±5.74 (T1), 6.60±4.88 (T2) and 8.10±4.87 (T3) days]. Similar (P>0.05) estrous induction rates were found during both the DS [100.00% (T1), 100.00% (T2) and 95.50% (T3)] and the RS [100.00% (T1), 100.00% (T2) and 100.00% (T3)]. The estrous synchronization rate was found to be lower during the DS [36.60%; 30.00% (T1), 35.00% (T2) and 45.00% (T3)] than during the RS [56.60%; 50.00% (T1), 60.00% (T2) and 60.00% (T3)]. Pregnancy rates during the DS [P>0.05; 80.00% (T1), 70.00% (T2) and 75.00% (T3)] were lower than during the RS [P>0.05; 90.00% (T1), 90.00% (T2) and 95.00%(T3)]. In summary, the separation distance between bucks and does did not affect the reproductive outcome of Anglo Nubian goats over a 45-day MS under tropical conditions. Greater reproductive outcome was observed during the RS than the DS regardless of the separation distance between bucks and does.

Keywords

bioestimulation, goat, small ruminants, SF1-1100, Animal culture

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selected citations
These citations are derived from selected sources.
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!
0
Average
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