Table 2. Four-way (area, site, date, and tidal height) mixed analysis of covariance for incremental dry tunics biomass and incremental dry visceral biomass.
| Source of variation | df | MS | F | P |
|---|---|---|---|---|
| Incremental dry tunic biomass | ||||
| Survival | 1 | 8.0028 | 54.81 | <0.001 |
| Area | 2 | 0.2290 | 0.10 | 0.907 |
| Site (area) | 5 | 2.2654 | 4.73 | 0.060 |
| Date | 1 | 0.9963 | 3.350 | 0.124 |
| Tidal height | 1 | 2.5000 | 8.01 | 0.038 |
| Area × date | 2 | 0.8127 | 2.40 | 0.202 |
| Area × tidal height | 2 | 0.0249 | 0.08 | 0.924 |
| Date × tidal height | 1 | 0.0140 | 0.09 | 0.777 |
| Date × site (area) | 4 | 0.3500 | 2.26 | 0.224 |
| Tidal height × site (area) | 5 | 0.3086 | 1.99 | 0.252 |
| Area × date × tidal height | 2 | 0.0106 | 0.07 | 0.934 |
| Date × tidal height × site (area) | 4 | 0.1549 | 1.06 | 0.380 |
| Error | 100 | 0.1460 | ||
| Incremental dry visceral biomass | ||||
| Survival | 1 | 0.0179 | 21.09 | <0.001 |
| Area | 2 | 0.0286 | 3.20 | 0.132 |
| Site (area) | 5 | 0.0090 | 0.78 | 0.613 |
| Date | 1 | 0.0274 | 4.19 | 0.164 |
| Tidal height | 1 | 0.0128 | 12.45 | 0.018 |
| Area × date | 2 | 0.0178 | 1.46 | 0.333 |
| Area × tidal height | 2 | 0.0021 | 2.07 | 0.225 |
| Date × tidal height | 1 | 0.0001 | 0.08 | 0.792 |
| Date × site (area) | 4 | 0.0127 | 9.39 | 0.026 |
| Tidal height × site (area) | 5 | 0.0010 | 0.77 | 0.616 |
| Area × date × tidal height | 2 | 0.0001 | 0.05 | 0.949 |
| Date × tidal height × site (area) | 4 | 0.0013 | 1.60 | 0.180 |
| Error | 100 | 0.0008 |
Boldface indicates statistical significance. The covariate used was survival number. See Table 1 for abbreviations.