Table 1.
Summary of results from the three experiments testing for horizontal transmission of aphid endosymbionts by animal vectors. (No. of recipients is the number of uninfected aphids that were exposed to a potential vector; no. of recipients lost is the number of these aphids that died or were killed by parasitoids before leaving any offspring; no. of surviving recipients is the number of recipients that survived the vectors' attack and reproduced; and no. of infected recipients is the number of these survivors whose offspring tested positive for endosymbionts in diagnostic PCRs, demonstrating that they acquired the symbiont from the vector and passed it on to their offspring.)
| donor clone no. | 259 (R. insecticola) |
402 (H. defensa) |
transmission rate (95% CI) |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| recipient clone no. | 256 | 401 | 405 | 256 | 401 | 405 | total | all recipients | survivors only | |
| mite experiment | no. of recipients | 8 | 17 | 20 | 18 | 5 | 21 | 89 | ||
| no. of recipients lost | 1 | 2 | 2 | 4 | 3 | 2 | 14 | |||
| no. of surviving recipients | 7 | 15 | 18 | 14 | 2 | 19 | 75 | |||
| no. of infected recipients | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0–0.043)a | 0 (0–0.049)a | |
| parasitoid experiment 1 | no. of recipients | 27 | 26 | 24 | 27 | 28 | 22 | 154 | ||
| no. of recipients lost | 23 | 20 | 15 | 18 | 14 | 6 | 96 | |||
| no. of surviving recipients | 4 | 6 | 9 | 9 | 14 | 16 | 58 | |||
| no. of infected recipients | 2 | 0 | 0 | 0 | 0 | 3 | 5 | 0.033 (0.013–0.073)a | 0.086 (0.037–0.186)a | |
| parasitoid experiment 2 | no. of recipients | 14 | 14 | 39 | 15 | 9 | 22 | 113 | ||
| no. of recipients lost | 7 | 8 | 10 | 5 | 1 | 13 | 44 | |||
| no. of surviving recipients | 7 | 6 | 29 | 10 | 8 | 9 | 69 | |||
| no. of infected recipients | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0–0.033)a | 0 (0–0.053)a | |