Table 2.
Median lifespan estimate and mortality rate of wasps emerging from different syconia at 28°C and 85% relative humidity. Median lifespan estimate (h) derived from Kaplan–Meier analysis. Cox's proportional hazards model (hazard ratio, HR), regression coefficient (coeff), standard error (s.e.) and Wald test for Valisia malayana, Ceratosolen c. hewitti and Ceratosolen appendiculatus.
| no. of wasps | lifespan estimate (h) | mortality rate |
|||||
|---|---|---|---|---|---|---|---|
| HR | coeff. | s.e. | p-value | Wald test | |||
| V. malayana | |||||||
| A (baseline group) | 41 | 24 | 1.0 | 0 | — | — | W = 132, d.f. = 5, p < 0.001 |
| B | 88 | 12 | 2.7 | 0.98 | 0.19 | >0.001 | |
| C | 37 | 24 | 1.3 | 0.30 | 0.22 | 0.20 | |
| D | 101 | 24 | 0.7 | −0.43 | 0.19 | 0.02 | |
| E | 77 | 12 | 0.6 | −0.51 | 0.20 | 0.01 | |
| F | 74 | 24 | 0.5 | −0.79 | 0.20 | >0.001 | |
| C. c. hewitti | |||||||
| A (baseline group) | 111 | 12 | 1.0 | 0 | — | — | W = 14, d.f. = 1, p < 0.001 |
| B | 204 | 24 | 0.6 | 0.64 | 0.12 | >0.001 | |
| C. appendiculatus | |||||||
| A (baseline group) | 41 | 24 | 1.0 | 0 | — | — | W = 24, d.f. = 3, p < 0.001 |
| B | 62 | 24 | 0.6 | −0.47 | 0.20 | 0.02 | |
| C | 87 | 24 | 1.1 | 0.10 | 0.19 | 0.60 | |
| D | 78 | 24 | 0.5 | −0.61 | 0.20 | <0.001 | |