Table 3. Overview of subjects and facilities.
| Study Facility | N | Species | Age Range | Social Housing | Test Location | Time Period |
|---|---|---|---|---|---|---|
| Zoo 1 | 6 | P. pygmaeus | 6–43 | Mixed-age group | Sleeping quarter | Apr-May 2013 |
| Zoo 2 | 8 | P. pygmaeus | 13–52 | Mixed-age group | Sleeping quarter | Jan-Feb 2014 |
| Zoo 3 | 4 | P. abelii | 5–13 | Mixed-age group | Smaller enclosure | Nov 2013 |
| Zoo 4 | 4 | P. pygmaeus | 13–31 | Mixed-age group | Sleeping quarter | Jan 2015 |
| Zoo 5 | 4 | P. abelii | 8–23 | Mixed-age group | Sleeping quarter | Nov-Dec 2012 |
| Zoo 6 | 5 | P. abelii | 9–49 | Mixed-age group | Sleeping quarter | Mar 2013 |
| Zoo 7 | 6 | P. abelii | 5–25 | Mixed-age group | Test enclosure | Mar 2014 |
| Zoo 8 | 2 | P. pygmaeus | 18–20 | Mixed-age group | Sleeping quarter | Feb 2015 |
| Zoo 9 | 2 | P. pygmaeus | 14–36 | Mixed-age group | Sleeping quarter | Jan-Feb 2013 |
| Rehab. Station 1 | 5 | P. abelii | 3–6 | Solitary | Home enclosure | Apr-Jun 2013 |
| Rehab. station 2 | 18 | P. pygmaeus | 6–17 | Solitary | Home enclosure | May-Jun 2014 |
| Rehab. station 3 | 28 | P. pygmaeus | 8–14.5 | Peer group | Test enclosure | June-Sep 2012 |
| Rehab. station 4 | 11 | P. abelii | 5–25 | Solitary | Home enclosure | Oct 2012–Mar 2013 |