Table 3. Comparison of reproduction and life table parameters.
Comparison of reproduction and life table parameters [mean standard error (SE)] of C. septempunctata reared on four aphid species.
| Parameters | R. padi | R. maidis | S. avenae | S. graminum |
|---|---|---|---|---|
| APOP | 3.26 ± 0.10b | 4.44 ± 0.13a | 3.56 ± 0.12b | 3.47 ± 0.34b |
| TPOP | 19.84 ± 0.29c | 28.94 ± 0.35a | 24.67 ± 0.35b | 25.24 ± 0.4b |
| Oviposition days | 25.16 ± 0.35b | 24.62 ± 0.47b | 22.22 ± 0.3c | 27.59 ± 0.37a |
| Fecundity (eggs per female) | 760.05 ± 4.25a | 348.94 ± 2.16c | 345.39 ± 3.4c | 529.00 ± 3.43b |
| Daily fecundity (maximum) | 72 | 48 | 36 | 57 |
| Lifelong fecundity (maximum) | 787 | 360 | 370 | 553 |
| R0 (offspring individual−1) | 289.04 ± 52.15a | 111.68 ± 23.01b | 124.27 ± 23.48b | 179.77 ± 35.46ab |
| T (days) | 29.02 ± 0.34d | 39.75 ± 0.37a | 34.29 ± 0.31c | 36.02 ± 0.17b |
| r (d) | 0.1946 ± 0.0072a | 0.1180 ± 0.0057c | 0.1400 ± 0.0061b | 0.1435 ± 0.0060b |
| λ (d1) | 1.2149 ± 0.0087a | 1.1253 ± 0.0064c | 1.1504 ± 0.0070b | 1.1543 ± 0.0069b |
Notes.
Values with similar letters in a row are statistically non-significant at the 5% confidence level. The standard error (SE) was estimated by bootstrapping (100,000 replications).
- APOP
- adult pre-ovipositional period
- TPOP
- total pre-ovipositional period (time from birth to the first reproduction by females)
- R0
- net reproductive rate
- r
- intrinsic rate of increase
- T
- mean generation time
- λ
- finite rate of increase