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. 2022 Nov 25;10:e14453. doi: 10.7717/peerj.14453

Table 2. Definitions of traits used in the keeper assessment survey.

Adjective Definition
Active Moves about a lot
Anxious Uneasy, easily startled
Calm Not easily disturbed by changes within or outside environment
Cautious Exhibits care in actions
Cooperative Easily compliant
Curious Readily explores new situations
Dominant Displaces/overpowers others
Excitable Strong reaction to changes
Fearful Easily shaken; avoids changes and assumes protective or aggressive body postures
Flexible Adapts comfortably to change
Playful Initiates and easily joins in play
Sociable Seeks out companionship
Solitary Chooses to spend time alone
Stereotypical Fixed and oversimplified in behaviors
Submissive Gives in easily to others
Tense Shows restraint in posture and movement; carries the body stiffly and tries to pull back and be less noticeable
Vigilant Alert, attentive, notices all changes
Uninterested No care in changes in environment, or conspecifics
With novelties or environmental changes
Aggressive Hostile or threatening reaction
Fearful Retreats from others
Friendly Initiates proximity
Uninterested Shows no interest
With humans
Aggressive Hostile or threatening rection
Fearful Retreats from people
Friendly Initiates proximity
Uninterested Shows no interest