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2012, Number 2

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AbanicoVet 2012; 2 (2)

Performance lambing and weaning of ewes Pelibuey and Romanov crosses with synchronized with progestins and different doses of eCG

Ponce CJL, Macías CU, Álvarez VFD, Sandoval TMA, Avendaño RL, Águila TE

Language: Spanish
References: 15
Page: 25-32
PDF size: 222.95 Kb.


ABSTRACT

Were synchronized thirty-nine sheep (19; Pelibuey (Pb) and 20; Pelibuey x Romanov (PbRv) with a synthetic progestin and low dose of eCG (140 and 280 IU), the effect of survival rate per ewe lambing, litter size and weight of ewe trated and lambing. It used a completely randomized design with 2 x 2 factorial arrangement to analyze the data. None response variable was affected (P›0.05) by interaction between study factors per dose x genotype main effect of eCG. The interaction of eCG dose x breed of sheep tended to affect litter size per ewe lambing at 30 d post-partum (P= 0.0755) survival rate per ewe lambing at 30 (P=0.0755) and 90 d (P=0.0794) post-partum. We conclude that both pure and cross Pelibuey show adequate production efficiency when subjected to estrus synchronization protocols with low-dose progestins and eCG. Therefore, it is recommended dose of 140 or 280 IU to reduce production costs of sheep farms.


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