Impact of the temperament of Nellore cows on the quality of handling and pregnancy rates in fixed-time artificial insemination

摘要: Abstract The aim of this study was to evaluate the effects temperament on quality and efficiency handling pregnancy rate Nellore cows submitted a fixed time artificial insemination (FTAI) protocol. Temperament procedures were simultaneously assessed in 798 first (d0), ninth (d9) 11th days (d11) FTAI protocol, using flight speed (FS) crush score (CS) tests. During process performed d11 following indicators recorded: rough or overly aggressive by stockpersons ( AGGRESSION ), accidents ACCIDENT inseminate TIME degree dirtiness cows’ perineal region DIRTINESS ). There significant effect CS P =0.013) =0.004), while FS tended affect =0.06) likelihood =0.07). Cows subjected and/or had greater mean than that did not face such aversive situations (2.07±1.18 vs. 1.74±0.75 m/s, =0.0003). chance (expressed odds ratio) with low (OR=1.48) high (defined as reference class, OR=1) χ 2 =3.73, =0.05), group 10% more pregnant (with 52.59% 42.62% cows, respectively). Pregnant significantly lower means relative non-pregnant d0 (1.79 2.10 m/s, 1.79 m/s, =0.038) (1.70 m/s 1.90 m/s, =0.004). We conclude excitable has an during FTAI, increasing required for insemination, actions stockpersons. Also, cattle measured reduces beef cows.