near-significantp = 0.054
Similarly, the total duration of aggressive behavior per day was substantially reduced in enriched pens ( p < 0.001) and decreased progressively across weeks ( p < 0.001), while aggressive duration per bout was also shorter in the EE group ( p = 0.001) and varied temporally ( p < 0.001), with a near-significant interaction ( p = 0.054) suggesting an increasing magnitude of the enrichment effect at later stages.