Table 1.
Summary statistics (mean ± s.e.) from behavioural and life-history data collected from our five treatments (n = 45 for each): related-pair, a female with a single sibling male; unrelated-pair, a female with a single unrelated male; all-related, a female with three males related to her and each other; males-related, a female with a three males related to each other but not to her; and all-unrelated, a female with a group of entirely unrelated males, either to her or each other.
| variable | related-pair | unrelated-pair | all-related | males-related | all-unrelated |
|---|---|---|---|---|---|
| behaviour | |||||
| courtships (events day−1) | 1.08 ± 0.07 | 0.95 ± 0.06 | 2.15 ± 0.11 | 2.10 ± 0.09 | 2.51 ± 0.10 |
| fighting (events day−1) | n.a. | n.a. | 0.91 ± 0.07 | 0.96 ± 0.06 | 1.17 ± 0.08 |
| copulations (lifetime) | 0.42 ± 0.12 | 0.51 ± 0.13 | 0.78 ± 0.16 | 0.84 ± 0.17 | 0.62 ± 0.13 |
| fitness | |||||
| longevity (days) | 29.38 ± 1.03 | 28.44 ± 1.41 | 24.20 ± 1.14 | 25.00 ± 1.00 | 24.82 ± 1.18 |
| reproductive lifespan (days) | 23.51 ± 1.44 | 23.47 ± 1.58 | 18.64 ± 1.54 | 18.00 ± 1.48 | 19.47 ± 1.32 |
| egg production | |||||
| lifetime (total) | 154.70 ± 18.12 | 163.10 ± 20.81 | 117.90 ± 14.38 | 109.60 ± 12.69 | 140.10 ± 16.42 |
| lifetime (eggs day−1) | 4.92 ± 0.49 | 5.25 ± 0.54 | 4.48 ± 0.48 | 4.23 ± 0.42 | 5.36 ± 0.55 |
| short-term (total) | 19.51 ± 1.93 | 19.11 ± 1.51 | 18.84 ± 1.85 | 18.60 ± 1.70 | 24.00 ± 1.27 |