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Figure 9
Analysis of differences determined by Tukey's HSD test between modalities in mussel biomass production with 95% confidence intervals (significant results [p < 0_05] are in bold)
| Overall production (APP) | |||||||
|---|---|---|---|---|---|---|---|
| Seed-size of spat (mm) | Spat Sources | ||||||
| 10 – 30 | 30 – 60 | >60 | Ain Tagourait | Study site | Tenes | Tlemcen | |
| P-value | < 0.0001 | < 0.0001 | 0.003 | 0.810 | 0.682 | 0.537 | 0.406 |
| Estimated means | 2.189 ± 0.07 | 1.276 ± 0.04 | 0.949 ± 0.09 | 1.401 ± 0.13 | 1.450 ± 0.06 | 1.261 ± 0.14 | 1.595 ± 0.09 |
| Groups | A | B | C | A | A | A | A |
Analysis of the differences determined by Tukey's HSD test between the modalities for mussels with 95% confidence intervals (significant results [p < 0_05] are in bold)
| Total weight of mussels (g) | |||||
|---|---|---|---|---|---|
| Seed-size of spat (mm) | Spat Sources | ||||
| 10 – 30 | 30 – 60 | Study site | Tenes | Tlemcen | |
| P-value | < 0.0001 | < 0.0001 | 0.001 | 0.001 | 0.001 |
| Estimated means | 14.539 ± 0.415 | 11.430 ± 0.256 | 12.221 ± 0.265 | 10.107 ± 0.571 | 14.393 ± 0.526 |
| Groups | A | B | B | C | A |
Statistical analysis of variance of the marketability indices and total weight of mussels, sampled according to two initial seeding sizes and three origins of the seeded spat stocks
| df | SS | MS | F | P | ||
|---|---|---|---|---|---|---|
| Spat Sources : Study site; Tlemcen; Tenes | Total weight of mussels (g) | 2 | 1730.454 | 865.227 | 15.325 | < 0.0001 |
| Percentage edibility (PE) | 0.090 | 0.045 | 4,101 | 0.017 | ||
| Condition index (CI) | 0.316 | 0.158 | 1.188 | 0.305 | ||
| Shell thickness index (STI) | 7.557 | 3.779 | 8.61 | <0.0001 | ||
| Seed-size of spat (mm) | Total weight of mussels (g) | 1 | 2275.739 | 2275,739 | 40.676 | < 0.0001 |
| Percentage edibility (PE) | 0.493 | 0.493 | 35.898 | < 0.0001 | ||
| Condition index (CI) | 13.195 | 13.195 | 32.190 | < 0.0001 | ||
| Shell thickness index (STI) | 3.992 | 3.992 | 9.06 | 0.003 |
Statistical analysis of variance of the average physical product of mussel plots according to the three initial seeding sizes and the four origins of the seeded spat stocks
| df | SS | MS | F | P | ||
|---|---|---|---|---|---|---|
| Spat Sources : | Overall production (APP) | 3 | 2.445 | 0.815 | 1.640 | 0.180 |
| Gain biomass (%) | 13.278 | 4.426 | 10.581 | < 0.0001 | ||
| Losses (%) | 0.395 | 0.132 | 7.857 | < 0.0001 | ||
| Seed-size of spat (mm) | Overall production (APP) | 2 | 54.522 | 27.261 | 87.960 | < 0.0001 |
| Gain biomass (%) | 38.029 | 19.015 | 62.683 | < 0.0001 | ||
| Losses (%) | 0.072 | 0.036 | 1.639 | 0.203 |