Table 1. Analysis of deviance table for hierarchical comparisons of log-linear models to test for patterns of complete dependence and conditional independence of variables inducing spawning response in crown-of-thorns starfish.
‘Spawning’ was considered to be a response variable, so all fitted models included the ‘Treatment’ by ‘Sex’ interaction term.
| Source | G2 | df | p-value |
|---|---|---|---|
| (a) Temperature | |||
| Treatment | 17.530 | 4 | 0.002 |
| Sex | 9.954 | 3 | 0.019 |
| Treatment × Sex | 3.400e-10 | 2 | 1.000 |
| (b) Water Quality | |||
| Treatment | 0.573 | 4 | 0.966 |
| Sex | 5.965 | 3 | 0.113 |
| Treatment × Sex | 4.887e-10 | 2 | 1.000 |
| (c) Phytoplankton (PP) | |||
| Treatment | 10.379 | 6 | 0.110 |
| Sex | 13.802 | 4 | 0.008 |
| Treatment × Sex | 3.307e-10 | 3 | 1.000 |
| (d) Gamete | |||
| Treatment | 18.962 | 4 | 0.001 |
| Sex | 2.348 | 3 | 0.503 |
| Treatment × Sex | 0.736 | 2 | 0.692 |
| (e) Sperm + PP | |||
| Treatment | 16.412 | 4 | 0.003 |
| Sex | 3.358 | 3 | 0.340 |
| Treatment × Sex | 0.153 | 2 | 0.926 |