Family types Age N Vigilance proportion Vigilance proportion Collective vigilance Vigilance duration / Second Vigilance duration / Second
Mean ± SD T-test Mean ± SD Mean ± SD T-test
F2-0 Adults 12 28.29±25.15% 34.03±30.51%, n=10 17.36±29.52
F2-1 Adults 33 27.30±20.00% t=2.212, df=47, p=0.032 43.92±32.18%, n=16 12.05±14.34 t=-0.039, df=47, p=0.969
Juveniles 16 16.65±16.69% 11.78±10.81
F2-2 Adults 21 31.28±21.45% t=4.354, df=32.024, p=0.000 36.53±26.89%, n=11 12.81±10.28 t=1.471, df=36, p=0.150
Juveniles 20 8.74±8.72 8.41±5.70
Total Adults 66 28.75±21.18% t=4.711, df=100, p=0.000 39.05±29.74%, n=37 13.26±16.89 t=0.565, df=97, p=0.574
Juveniles 36 12.26±13.29% 9.91±8.40