Reproductive response of synchronized and extensively grazed Blackbelly ewes during the summer in the tropics
Ponce-Covarrubiasa, José Luis; García y Gonzáleza, Ethel Caterina; Ramírez-Bribiescab, Jacinto Efrén; Pineda-Burgos, Blanca Celia.
J. Anim. Behav. Biometeorol;
11(1): e2023001, Jan. 2023. graf, tab
Artigo
em Inglês
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| ID: biblio-1434655
Resumo
The present experiment aimed to evaluate the reproductive response of Blackbelly ewes synchronized with low doses of eCG during the summer in a tropical climate. Sixty multiparous hair ewes were divided into three groups (20 ewes/group): control group (CG; 0 IU of eCG), treated group 1 (TG-1; 140 IU of eCG) and treated group 2 (TG-2; 300 IU of eCG). The study found that the three groups of ewes showed differences in their reproductive behavior (P < 0.01). Indeed, all the ewes in the TG-1 and TG-2 groups presented a higher response to estrus than the CG (P < 0.01). In the same way, TG1 and TG-2 had an onset to estrus in less time (P < 0.01). On the other hand, prolificacy was also higher in TG-1 and TG-2 (P < 0.05). Likewise, ewes from TG-1 and TG-2 had more lambs than those from CG (P < 0.05). On the other hand, the variables of fertility and gestation length were similar regardless of the group of ewes (P > 0.05). It´s concluded that the ewes treated with eCG presented good reproductive behavior, and the majority did so in the first 24 to 36 h after removing the intravaginal device.
Biblioteca responsável:
BR68.1
Localização: BR68.1
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