Zigovski Gustavo, Hernandez Elmer Modesto Elvir, Bez Isabela Cristina Colaço, Nakamura Gabriel Kioshi Cavalari, Catoia Mariana Regina Rosa, Buzatto Ana Julia Carrasco, Daros Ruan Rolnei, Carvalho Paulo Levi de Oliveira, Costa Leandro Batista
Graduate Program in Animal Science, School of Medicine and Life Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, 80215-901, Brazil.
Monohub - Research Group for Monogastric Animals, Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, 80215-901, Brazil.
Vet Res Commun. 2025 Mar 13;49(3):139. doi: 10.1007/s11259-025-10714-y.
This study investigated whether adding phytase to the diet of castrated male and female piglets modulates behavior and if the response differs between sexes. The experiment involved 126 piglets, weaned at 21 days of age, with an average weight of 6.53 ± 1.29 kg. Six treatments were employed, with seven replications and three animals per pen. The treatments were PC: positive control diet - adequate nutritional levels and without phytase; NC: negative control diet - reduced levels of nutrients and metabolizable energy, and without phytase; negative control diets with 500; 1.000; 1.500 and 2.000 FTU/kg of feed. Piglets were subjected to open field (OF), novel object (NO) and reactivity during weighing (RDW) behavioral tests. In the OF, females showed longer exploration time (p = 0.036) and explored a greater number of quadrants (p = 0.031). Conversely, males remained more static (p < 0.01) and vocalized more (p = 0.041). For the NO, females exhibited shorter latency to reach the novel object (p = 0.040). In the RDW, male piglets exhibited greater movement resistance (p = 0.011) and vocalized more frequently (p = 0.038). The addition of phytase did not affect piglet behavior; however, the results suggest that females are more explorative, while castrated males show increased immobility in response to fear.
本研究调查了在去势公母仔猪日粮中添加植酸酶是否会调节其行为，以及两性之间的反应是否存在差异。实验涉及126头21日龄断奶的仔猪，平均体重为6.53±1.29千克。采用了六种处理方式，每种处理七次重复，每栏三头动物。处理方式分别为：PC：阳性对照日粮——营养水平充足且不含植酸酶；NC：阴性对照日粮——营养成分和可代谢能量水平降低且不含植酸酶；含500、1000、1500和2000 FTU/kg饲料的阴性对照日粮。仔猪接受了旷场试验（OF）、新物体试验（NO）以及称重时的反应性试验（RDW）。在旷场试验中，雌性仔猪的探索时间更长（p = 0.036），探索的象限更多（p = 0.031）。相反，雄性仔猪更安静（p < 0.01）且叫声更多（p = 0.041）。在新物体试验中，雌性仔猪接触新物体的潜伏期更短（p = 0.040）。在称重时的反应性试验中，雄性仔猪表现出更大的运动阻力（p = 0.011）且叫声更频繁（p = 0.038）。添加植酸酶并未影响仔猪的行为；然而，结果表明雌性仔猪更具探索性，而去势雄性仔猪在面对恐惧时表现出更高的静止性。
