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Table 1
Results of analysis of variance (two-way ANOVA) performed for each life-table demographic parameter of B. angularis exposed to four Asplanchna-released kairomone concentrations and cultured at two S. obliquus levels.
| Variation source | SS | df | MS | F | P |
|---|---|---|---|---|---|
| Life expectancy at hatching | |||||
| Kairomone concentration (A) | 1.63 | 3 | 0.54 | 24.35 | <0.01 |
| Algal density (B) | 0.61 | 1 | 0.61 | 27.37 | <0.01 |
| A × B | 0.55 | 3 | 0.18 | 8.18 | <0.01 |
| Error | 0.36 | 16 | 0.02 | ||
| Average lifespan | |||||
| Kairomone concentration (A) | 1.63 | 3 | 0.54 | 24.52 | <0.01 |
| Algal density (B) | 0.60 | 1 | 0.60 | 27.09 | <0.01 |
| A × B | 0.56 | 3 | 0.19 | 8.35 | <0.01 |
| Error | 0.36 | 16 | 0.02 | ||
| Generation time | |||||
| Kairomone concentration (A) | 1.66 | 3 | 0.55 | 16.81 | <0.01 |
| Algal density (B) | 0.00 | 1 | 0.00 | 0.06 | >0.05 |
| A × B | 0.09 | 3 | 0.03 | 0.88 | >0.05 |
| Error | 0.53 | 16 | 0.03 | ||
| Net reproductive rate | |||||
| Kairomone concentration (A) | 84.77 | 3 | 28.26 | 45.54 | <0.01 |
| Algal density (B) | 8.66 | 1 | 8.66 | 13.96 | <0.01 |
| A × B | 0.17 | 3 | 0.06 | 0.09 | >0.05 |
| Error | 9.93 | 16 | 0.62 | ||
| Intrinsic rate of population increase | |||||
| Kairomone concentration (A) | 0.20 | 3 | 0.07 | 9.39 | <0.01 |
| Algal density (B) | 0.05 | 1 | 0.05 | 6.43 | <0.05 |
| A × B | 0.02 | 3 | 0.01 | 0.84 | >0.05 |
| Error | 0.11 | 16 | 0.01 | ||
| Proportion of sexual offspring | |||||
| Kairomone concentration (A) | 0.02 | 3 | 0.01 | 15.01 | <0.01 |
| Algal density (B) | 0.00 | 1 | 0.00 | 0.69 | >0.05 |
| A × B | 0.00 | 3 | 0.00 | 1.36 | >0.05 |
| Error | 0.00 | 16 | 0.00 | ||
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