Table 1.
Parameter estimates for effects of spousal relatedness on fitness by subsistence type. (Husband and wife marriages are the numbers of marriages in which each spouse from the couple was involved. *p < 0.05; **p < 0.001.)
| non-foragers |
foragers |
full model | |||
|---|---|---|---|---|---|
| n | estimate | n | estimate | ||
| relatedness [0, 0.03125) | 6869 | (reference) | 3445 | (reference) | (reference) |
| relatedness [0.03125, 0.0625) | 482 | 0.14** (0.03) | 29 | −0.10 (0.11) | 0.14** (0.03) |
| relatedness [0.0625, 0.125) | 536 | 0.13** (0.03) | 25 | 0.03 (0.12) | 0.13** (0.03) |
| relatedness [0.125, 1) | 1008 | 0.18** (0.03) | 45 | −0.20* (0.09) | 0.18** (0.03) |
| husband marriages | — | −0.01 (0.01) | — | 0.02 (0.02) | 0.00 (0.01) |
| wife marriages | — | −0.17** (0.01) | — | −0.17** (0.02) | −0.17** (0.01) |
| generational depth | — | <0.001 (0.01) | — | 0.04 (0.04) | 0.01 (0.01) |
| subsistence | — | — | — | — | 0.05a(0.07) |
| subsistence × relatedness [0.03125, 0.0625) | — | — | — | — | −0.22 (0.13) |
| subsistence × relatedness [0.0625, 0.125) | — | — | — | — | −0.11 (0.14) |
| subsistence × relatedness [0.125, 1) | — | — | — | — | −0.39** (0.10) |
aMain effect of subsistence, or the difference between non-foragers and foragers at the lowest level of relatedness.