Table 1 Ethogram used during personality tests (OF Open Field, NO Novel Object), definitions based on22. Times in brackets represent the amount of time for which the behaviour was evaluated (NO: 5 min, OF + NO: 10 min).

From: Gilts prefer an open pen to a stall

Behavior

Test

Definition

Lines crossed

OF + NO (10 min)

Number of gridlines that a gilt’s front two limbs cross. Gilt may be walking forward or backward

Nose wall

OF + NO (10 min)

Duration in seconds the gilt places snout near the walls of the arena. Gilt may be walking or standing still

Nose floor

OF + NO (10 min)

Duration in seconds the gilt places snout near the floor. Gilt may be walking or standing still

Lie down

OF + NO (10 min)

Duration in seconds the gilt lies down

Latency to contact

NO (5 min)

Time in seconds for gilt to make first physical contact with the novel object once it is placed in the arena

Nose object

NO (5 min)

Duration in seconds the gilt places snout near or on the object