Table 2. Correlations between body mass and reproductive characteristics for different avian and mammalian orders.
| BM vs. clutch/litter size | BM vs. annual offspring number | |||
| Order | PGLS | N | PGLS | N |
| Struthioniformes | 0 | 6 | 0 | 6 |
| Tinamiformes | 0 | 6 | 0 | 6 |
| Galliformes | 0 | 46 | 0 | 46 |
| Anseriformes | 0 | 58 | 0 | 58 |
| Rodentia | 0 | 60 | 0 | 32 |
| Lagomorpha | 0 | 14 | -** | 12 |
| Artiodactyla | -* | 144 | -*** | 87 |
| Perissodactyla | 0 | 15 | -*** | 11 |
| Primates | 0 | 80 | -*** | 59 |
| Diprotodontia | 0 | 35 | ||
Significance levels:
*<0.05,
**<0.01,
***<0.001.
Correlations are given for double log-transformed data using phylogenetic generalised least square regression (PGLS). 0 no correlation, +significant positive correlation, - significant negative correlation. BM body mass. N sample size.