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Table 1 Least square means and standard errors (SE) of body weight (BW) at 41 d of age (kg), and the total number (JOY#) and total duration (JOYt) of joyful brusque movements in eight min in three consecutive runway tests at 41, 44 and 48 d of age, by sex and by litter

From: A note on the consistency of a behavioral play marker in piglets

Items Males Females Litter 1 Litter 2 Litter 3 Litter 4
BW, kg 7.38 (0.23) 6.79 (0.25)†     
JOY#41 (#) 7.7 (1.3) 12.0 (1.4)* 11.9a (1.6) 5.9b (1.6) 11.5a (1.6) 10.5ab (1.8)
JOY#44 (#) 5.6 (1.4) 8.9 (1.5) 7.9a (1.9) 8.5a (1.9) 7.0a (1.8) 6.1a (2.1)
JOY#48 (#) 7.7 (0.9) 9.7 (1.0) 11.0a (1.2) 10.0a (1.2) 11.2a (1.2) 2.2b (1.3)
JOYt41 (s) 18.7 (5.1) 32.6 (5.5)† 54.0a (5.7) 8.7b (5.7) 24.3c (5.3) 14.9bc (6.0)
JOYt44 (s) 8.4 (2.5) 14.1 (2.6) 16.5a (3.4) 11.7a (3.4) 9.8a (3.2) 8.3a (3.6)
JOYt48 (s) 13.0 (1.9) 17.2 (2.0) 20.1a (2.7) 18.7a (2.7) 18.3a (2.6) 2.9b (2.9)
  1. Effect of sex: * P < 0.05; † P < 0.10.
  2. Effect of litter: a,b,c Values with different superscripts are significantly different (P < 0.05).