Table 1.
Proportion of sows exhibiting each aggressive pattern* according to the social status.
Fig 1.
Non-reciprocal agonistic acts across hours on mixing day according to social status.
Back-transformed predicted mean [CI] of total non-reciprocal agonistic acts (i.e., bites and knocks, threats, bullying) (a) delivered and (b) received on mixing day across observation hours (h1, h2, h3, h4) and according to the social status (Dominant: Solid black line; Subdominant: Solid grey line; Loser: Dotted black line; Avoider: Sotted grey line).**,***; Means differ significantly (** P<0.010, *** P<0.001); † Means tend to differ (P<0.10) between social statuses for a same observation hour.
Table 2.
Total number of reciprocal and non-reciprocal agonistic acts delivered and received by gestating sows across the first four hours post-mixing (on day 0) according to their social status.
Fig 2.
Non-reciprocal agonistic acts delivered across days according to previous experience in the group and social status.
Back-transformed predicted mean [CI] number of (a) total non-reciprocal agonistic acts, (b) bites and knocks, and (c) threats delivered per hour by Resident sows, (d) total non-reciprocal agonistic acts, (e) bites and knocks, and (f) threats delivered per hour by New sows and (g) bullying delivered per hour by all sows independently of their previous experience in the group, across observation days (d0, d2, d27, d29) and according to the social status (Dominant: Solid black line; Subdominant: Solid grey line; Loser: Dotted black line; Avoider: Dotted grey line). *,**,***; Means differ significantly (* P<0.050, ** P<0.010, *** P<0.001); † Means tend to differ (P<0.10) between social statuses for a same observation day.
Fig 3.
Non-reciprocal agonistic acts received across days according to social status.
Back-transformed predicted mean [CI] number of (a) total non-reciprocal agonistic acts, (d) bites and knocks, (c) threats and (d) bullying received per hour by all sows across observation days (d0, d2, d27, d29) and according to the social status (Dominant: Solid black line; Subdominant: Solid grey line; Loser: Dotted black line; Avoider: Dotted grey line). *,**,***; Means differ significantly (* P<0.050, ** P<0.010, *** P<0.001); † Means tend to differ (P<0.10) between social statuses for a same observation day.
Fig 4.
Fights around mixing according to social status and previous experience in the group.
Back-transformed predicted mean [CI] number of fights per hour independently of the observation day (i.e., both day 0 (mixing day) and day 2) according to (a) the social status and (b) the previous experience in the group. ***; Means significantly differ (P < 0.001).
Fig 5.
Time spent fighting across days according to social status and previous experience in the group.
Back-transformed predicted mean [CI] time spent fighting (sec) per hour across observation days and according to the social status and the previous experience in the group. Different superscript letters indicate categories that significantly differ (P < 0.050).
Fig 6.
Fight duration across days according to social status.
Back-transformed predicted mean [CI] fight duration (sec) across observation days and according to the social status. Different superscript letters indicate categories that significantly differ (P < 0.050).
Table 3.
Summary of the impact of social status on body lesion scores on each scoring day post-mixing.