Table 1. Statistical analysis of the relationship between TL and spiral valve turn count of fishes.
| Dataset | Statistics | λ (95% CI) | a (95% CI) | t | p | b (95% CI) | t | p | AIC |
|---|---|---|---|---|---|---|---|---|---|
| Including osteichthyans | OLS | (0) | 12.4 (10.3;14.4) | 47.161 | <0.001 | 0.35 (0.24;0.47) | 6.108 | <0.001 | 34.408 |
| (n = 134) | PGLS1 | 1.000 (0.963;NA) | 10.9 (8.0;13.9) | 5.809 | <0.001 | 0.11 (0.01;0.21) | 2.094 | 0.038 | −44.016 |
| Elasmobranchs only | OLS | (0) | 12.5 (10.4;14.6) | 50.558 | <0.001 | 0.47 (0.35;0.58) | 7.939 | <0.001 | −7.430 |
| (n = 117) | PGLS2 | 0.982 (0.933;NA) | 13.8 (11.5;16.2) | 14.327 | <0.001 | 0.19 (0.11;0.27) | 4.630 | <0.001 | −153.952 |
Statistical analyses of the relationship between the maximum length of species (x) and the maximum number of turns in their spiral valve (y) according to y = a xb (for analysis by linear regression, values were log-transformed), using Ordinary Least Squares (OLS) or Phylogenetic Generalized Least Squares (PGLS). Data from Supplementary Table 1.
NA not applicable.
1with branch lengths set to 1.0.
2including branch lengths.