Table 2.
The weight, length, condition factor and percent of skeletal deformities in 124 dph cod fed control, MI or HI rotifers from 5 to 39 dph and identical diets thereafter.
| Control | MI | HI | P value | ||
|---|---|---|---|---|---|
| Growth | Weight (g) | 2.49 ± 0.22 | 2.56 ± 0.18 | 2.44 ± 0.25 | 0.67 |
| Length (cm) | 6.12 ± 0.17 | 6.19 ± 0.19 | 6.09 ± 0.18 | 0.75 | |
| Condition factor | 1.06 ± 0.05 | 1.05 ± 0.01 | 1.04 ± 0.01 | 0.43 | |
| Skeletal | Lower jaw | 4.0 ± 2.0 | 9.3 ± 7.6 | 5.3 ± 4.7 | 0.96 |
| deformitiesa * | Short upper jaw | 3.3 ± 3.1 | 0 | 0 | 0.26 |
| Palate bone | 1.3 ± 1.2 | 0 | 3.0 ± 4.2 | 0.28 | |
| Neck axis average (degrees)b | 186 ± 0.4 | 186 ± 0.6 | 184 ± 1.0 | 0.01 | |
| Neck axis <183 degrees | 25 ± 2 | 23 ± 10 | 39 ± 12 | 0.08 | |
| Fused vertebrate | 26 ± 6 | 15 ± 5 | 29 ± 10 | 0.45 | |
| No. of affected vertebrae (average fish- 1) | 2.1 ± 0.2 | 2.6 ± 0.6 | 2.6 ± 0.6 | 0.39 | |
| Scoliosis | 17 ± 2 | 21 ± 7 | 15 ± 4 | 0.42 | |
| Back axis | 1.3 ± 1.2 | 1.3 ± 1.2 | 3.1 ± 1.3 | 0.10 | |
| Total fish with malformation | 58 ± 5 | 52 ± 7 | 64 ± 11 | 0.26 |
Notes.
Data are mean ± SD (n = 3) except for HI data which are n = 2.
a
% of population unless otherwise indicated.
b
Normal neck angle is 180 ± 3°(Baeverfjord et al.).
*
Data analysed using regression (p < 0.05).