Evaluación del comportamiento animal y tiempo de manejo en mangas con paredes cerradas y abierta

Background. Handling chutes with curved and closed designs and chutes with open designs influence animal behavior and handling time in intensive bovine production systems. Objective. 716 animals were evaluated with sleeve behavior test (BT) Evaluate animal behavior and handling time in chute with closed design (CCD), and chute with open design (COD). Methodology. It was performed with five categories: non-aggressive (NA), slightly aggressive (SA)., moderately aggressive (MOA), aggressive (A), and very aggressive (VA); The handling time (HT) was counted as the time (seconds) elapsed by the animal from its entry to the press, the BT and HT data were analyzed with the Statistica v.10 statistical software, with the Kruskal-Wallis test. Result. A difference was found. Significant statistic (p ˂0.05), CCD gathered 12% in NA and SA compared to MOA, A and MA obtained 88%; In contrast, in COD it reached 49% in NA and SA and 51% for MOA, A and MA 51%, in HT all categories presented a significant statistical difference (p ˂0.05), CCD NA 45.32 (2.96) and, SA 50.32 (5.89), MOA 53.23 (5.13), A 60.45 (2.23) and MA 64.35 (1.93) in contrast to COD NA 25.45 (1.85), A 30.11 (0.44), LA 35.49 (2.56), A 39.11 (4.29) and MA 44.31 (5.24), it Implications. MPA has positive effects on animal behavior. Conclusions. There are significant statistical differences in the CM and TM in MPA, it is concluded that this type of chute facilitates the fluid movement of the animals, reducing their resistance and improving their cooperation with a lower level of reactivity.