Table 2.
Mean (± 1 SE) duration until onset of each male’s behaviour after a female’s introduction (in s).
| Control | 30 ppm | 60 ppm | 100 ppm | Statistics (K–W) | |
|---|---|---|---|---|---|
| Biting | 46.0 (21.1) | 54.7 (19.5) | 99.2 (57.7) | 165.3 (35.1) | χ2 = 8.24, df =3, p = 0.041 |
| Leading | 134.9 (31.2) | 133.6 (40.8) | 133.8 (60.6) | 276.1 (126.6) | χ2 = 1.26, df = 3, p = 0.747 |
| Zig-zagging | 218.5 (44.6) | 167.5 (44.4) | 195.5 (42.5) | 318.6 (288.9) | χ2 = 0.80, df = 3, p = 0.849 |
| Dorsal pricking | 471.5 (174.8) | 165.6 (93.1) | 291.5 (59.6) | χ2 = 1.39, df = 2, p = 0.498 | |
| Boring | 330.9 (43.5) | 201.8 (55.0) | 254.8 (36.5) | χ2 = 3.10, df = 2, p = 0.213 | |
| Fanning | 275.7 (46.6) | 248.8 (73.1) | 218.7 (7.2) | χ2 = 0.03, df = 2, p = 0.984 | |
| Gluing | 555.9 (125.0) | 298.9 (83.9) | 269.8 (242.2) | χ2 = 1.74, df = 2, p = 0.419 | |
| Creeping through | 294.6 (71.6) | 292.2 (116.3) | 368.7 (87.1) | χ2 = 1.06, df = 2, p = 0.590 | |
| Quivering | 461.9 (97.8) | 394.8 (90.7) | 285.5 (86.4) | χ2 = 0.63, df = 2, p = 0.730 | |
| Fertilizing | 890.8 (172.7) | 791.9 (298.8) | 518.5 (360.6) | χ2 = 0.89, df = 2, p = 0.640 |
Kruskal–Wallis (K–W) tests were used since sample sizes were small (N ≤ 10 fish per treatment), and only biting differed significantly between groups. Individual fish means were used to calculate experimental group means.