Table 1. Larval locomotion of D. melanogaster (the Oregon R-c, Canton-Special, Til-Til, Trana, vestigial, Orco, Syn 97CS and rut strains), D.pavani (La Florida strain), D.gaucha (the Buenos Aires strain), and the pavani female x gaucha male and gaucha female x pavani male hybrids.
Locomotion was measured in four conditions: (i) on agar (agar aroma, controls), (ii) agar plus synthetic food aroma, (iii) on agar plus conspecific odors, and (iv) on agar plus alien food aroma. For D. melanogaster larvae, D. pavani food was used as alien food. To D. pavani, D. gaucha and the hybrid larvae, alien food means D. melanogaster (Oregon R-c) food. Locomotion of N = 50 third instar larvae of each strain and species was measured by 2 min (see Materials and Methods).
| Species and strains | larval locomotion on agar (controls) (cpm/min) | larval locomotion on agar plus | ||
|---|---|---|---|---|
| steril food (cpm/min) | conspecific food (cpm/min) | alien food (cpm/min) | ||
| D. melanogaster | ||||
| Oregon R-c | 108.93 ± 3.27 | 99.72 ± 8.07 | 102.92 ± 4.71 | 103.21 ± 5.03 |
| Canton-Special | 96.59 ± 3.86 | 97.14 ± 4.73 | 99.62 ± 5.15 | 97.64 ± 3.92 |
| Til–Til | 96.09 ± 7.21 | 97.69 ± 3.48 | 96.84 ± 3.82 | 99.74 ± 3.92 |
| Trana | 66.72 ± 6.48 | 64.35 ± 5.71 | 70.13 ± 6.19 | 68.07 ± 5.74 |
| vestigial | 112.33 ± 5.49 | 110.85 ± 6.29 | 109.22 ± 4.73 | 110.41 ± 3.67 |
| Orco | 94.61 ± 5.43 | 96.71 ± 5.03 | 97.19 + 4.37 | 95.45 ± 4.76 |
| Syn 97CS | 107.96 ± 4.22 | 99.53 ± 6.46 | 101.05 ± 2.18 | 107.48 ± 5.72 |
| rut | 98.86 ± 5.41 | 99.06 + 5.79 | 97.42 ± 6.73 | 99.76 ± 3.25 |
| D. pavani | 60.31 ± 4.79 | 61.75 ± 3.25 | 64.32 ± 4.71 | 63.93 ± 4.21 |
| D. gaucha | 57.48 ± 5.81 | 58.12 ± 8.19 | 56.76 ± 3.15 | 58.35 ±6.05 |
| The F 1 hybrids | ||||
| pavani x gaucha | 59.58 ± 9.61 | 55.63 ± 7.46 | 60.21 ± 5.34 | 56.31 ± 4.76 |
| gaucha x pavani | 62.79 ± 8.72 | 65.28 ± 6.39 | 64.07 ± 7.15 | 60.32 ± 5.39 |