According to a CSIR-NET study, antelopes reduce predation risk via:
Group formation reduces individual predation risk through several mechanisms. In a larger group, the probability that any one antelope is captured can fall through the dilution effect, while many eyes increase the chance of detecting an approaching predator early. Coordinated vigilance, alarm signals, confusion caused by many moving targets, and collective defense can further reduce attack success. Individuals may also occupy safer central positions, although competition and disease increase with group size. Speed remains important during pursuit, but grouping changes both encounter and captur
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 14