Copyright Labêta et al. Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado. ) com nível de significância de 5%. Houve diferença significativa (p<0,05) para a motilidade, quando foram comparadas as temperaturas de 5 e 15 °C independentemente do uso do α-Tocoferol durante o período entre 12 e 72 horas. Os valores mais altos de motilidade foram obtidos com a temperatura de 15 °C. Observou-se também diferença (p<0,05) para a motilidade entre temperaturas de 5 e 15 °C quando comparado apenas com as amostras acrescidas de α-Tocoferol, bem como as amostras sem esta substância. A maior motilidade foi obtida novamente com a temperatura de 15 °C. Não foi observada diferença no vigor e na integridade da membrana (teste hiposmótico) entre as amostras adicionadas ou não de α-Tocoferol, em qualquer uma das temperaturas e tempos estudados. Conclui-se que a temperatura de 15 °C foi mais eficiente para a conservação de sêmen de cachaços durante 72 horas. Conclui-se também que a adição de 200 μg/mL de α-Tocoferol não melhorou a viabilidade dos espermatozoides submetidos à refrigeração. Efeito da vitamina E (α-TocoferolPalavras-chave: ejaculado, refrigeração, cachaço. AbstractThe objective of this study was to evaluate the addition of α-Tocopherol to swine insemination doses stored at 5 and 15 °C for a period of 72 hours. Semen samples (n=9) collected from three adult Pietrain boars were treated with or without 200 μg/mL of α-Tocopherol. The treatments were: T1: α-Tocopherol + cooling to 5 °C; T2: α-Tocopherol + cooling to 15 °C; T3: no α-Tocopherol + cooling to 5 °C; T4: no α-Tocopherol + cooling to 15 °C. All samples were evaluated up to 72 hours for sperm motility and intensity of movements every 12 hours, and the hiposmotic test was performed every 24 hours. The average of the motility, the intensity of movements and hiposmotic test (HOST) were analyzed by chi-square test (х 2 ) with 5% significance level. There was a significant difference (p <0.05) for motility when comparing the temperatures of 5 and 15 °C regardless of α-Tocopherol during the period between 12 and 72 hours. The highest motility values were obtained at 15 °C. It was also observed a difference (p <0.05) for sperm motility between temperatures of 5 to 15 °C when compared only the samples with α-Tocopherol, as well as the samples without this substance. The higher motility was obtained with 15 °C. No difference was observed for the intensity of movements and membrane integrity between samples added or not of α-Tocopherol, in any of the temperatures and times evaluated. We concluded that the temperature of 15 °C was more efficient for boar semen preservation over 72 hours. It is also concluded that the addition of 200 μg/mL of α-Tocopherol showed no improvement in the viability of cooled porcine semen.

In the technical swine industry, information management should play a central role in decision-making, involving careful management methods, accurate monitoring of information, implementation of corrections and people management. Given this, production planning, goal setting and action plan are starting points in management. Therefore, the proper management of pig activity requires data collection, to transform into information, in order to define the objectives, potentialities with available resources. This review aimed to address the best practices in pig production management with a view to business sustainability, improvement of productive efficiency and profitability, emphasizing important concepts and their practical applications.

In this study, we investigated the effects of eCG and GnRH on the induction of puberty in prepubertal gilts and evaluated the pregnancy rate and litter size in these females. Thirty 140-day-old gilts with an average weight of 80 kg were randomly divided into two treatments: hormonal treatment (n = 15): 1000 IU of eCG and 50 μg of GnRH; and control group (n = 15): induction of estrus by male presence. Gilts were inseminated at the second estrus and pregnancy was confirmed by the non-return to estrus. At farrowing, litter size, average piglet weight, and number of stillborn and mummified piglets were recorded for analysis. The variable pregnancy rate was subjected to the Chi-square test (χ 2 ), while variables age at first estrus, weight at insemination, and duration of first and second estrus, litter size, average weight, and average number of dead and mummified piglets were analyzed by the t test. Hormonal treatment induced puberty in 100% of the gilts in four days. There was a difference in age at first estrus and in weight at insemination. Animals in the control group had the first estrus later and weighed more than those under hormonal treatment (167 vs. 143 days, 117 vs. 102 kg, respectively). However, there was no difference between the two groups in the duration of first and second estrus (54 vs. 49 h, 45 vs. 36 h, respectively), in pregnancy rate (100 vs. 86%, respectively), litter size, average piglet weight, and number of dead and mummified piglets between the hormonal treatment and control animals (9.0 vs. 9.8 piglets, 1.3 vs. 1.3 kg, and 3.0 vs. 2.3 dead and mummified, respectively). The hormonal treatment is effective in inducing precocious puberty without impairing pregnancy rate and litter size as well as average weight of piglets.