Table 1.
Data set of mean group sizes at each grouping level for elephant, gelada, hamadryas, orca and elephants. (Numbers in parentheses indicate samples sizes at each grouping level (M–O Unit: mother–offspring unit; OMU: one-male unit). Data sources are given in the electronic supplementary material.)
| species | population | grouping level | ||||
|---|---|---|---|---|---|---|
| elephant | sub-population | clan | bond group | family | M–O unit | |
| Loxodonta africana | Amboseli | (1) 312 | (5) 62.4 | (3) 23 | (32) 9.75 | (3) 3.33 |
| gelada | community | band | team | OMU | clique | |
| Theropithecus gelada | Bole | (1) 181 | (3) 60.3 | (3) 27.0 | (10) 17.1 | (1) 5.1 |
| Gich | (1) 278 | (2) 139.0 | (25) 10.1 | |||
| Sankaber | (1) 577 | (5) 139.8 | (7) 28.7 | (46) 13.5 | ||
| Arsi | (1) 58 | (14) 7.9 | ||||
| mean | 345.3 | 99.3 | 27.9 | 12.2 | 5.1 | |
| hamadryas | troop | band | clan | OMU | clique | |
| Papio hamadryas hamadryas | Eritrea | (6) 139.2 | (92) 7.7 | |||
| Ethiopia | (2) 255 | (3) 73 | ||||
| Saudi Arabia | (32) 39.6 | (90) 6.5 | ||||
| Awash 1968 | (5) 59.4 | |||||
| Awash 1975 | (1) 63 | (2) 29.0 | (8) 7.3 | |||
| Filoha | (1) 165 | (24) 4.9 | ||||
| ErerGota 1971 | (1) 232 | (3) 77.3 | (3) 20.0 | (7) 8.6 | ||
| ErerGota 1977 | (1) 69 | (3) 23.0 | (10) 6.8 | |||
| Captive | (1) 2.9 | |||||
| mean | 243.5 | 85.7 | 24.0 | 7.0 | 2.9 | |
| orca | community | clan | pod | matriline | ||
| Orcinus orca | British Columbia | (1) 216 | (4) 74.8 | (13) 19.8 | (53) 5.62 |