Table 1. Correlations between non-invasive and invasive measurements used to assess brain size.
Correlation coefficient (Pearson r) and the parameters for ordinary least squares regression lines (slope and Y-intercept) are given with estimated 95% confidence intervals within brackets.
| Correlation coefficient (r) |
Slope | Y-intercept | |
|---|---|---|---|
| Brown trout fry | |||
| TeO-measure vs. Optic tectum width | 0.93 (0.84–0.97) | 0.87 (0.71–1.03) | 0.41 (−0.01–0.83) |
| TeO-measure vs. Loge (Brain mass) | 0.90 (0.76–0.96) | 0.99 (0.75–1.22) | −7.49 (−8.08 to −6.89) |
| Tel-measure vs. Telencephalon width | 0.57 (0.18–0.80) | 0.64 (0.19–1.08) | 0.47 (0.00–0.93) |
| Cb-measure vs. Cerebellum width | 0.63 (0.27–0.83) | 0.56 (0.22–0.87) | 0.48 (0.12–0.85) |
| Eye-diameter vs. Loge (Brain mass) | 0.90 (0.77–0.96) | 1.32 (1.02–1.62) | −7.49 (−8.05 to −6.90) |
| Head length vs. Loge (Brain mass) | 0.86 (0.69–0.94) | 0.28 (0.20–0.36) | −6.75 (−7.26 to −6.24) |
| Body length vs. Loge (Brain mass) | 0.92 (0.82–0.97) | 0.08 (0.06–0.09) | −7.20 (−7.64 to −6.75) |
| Zebrafish | |||
| TeO-measure vs. Optic tectum width | 0.92 (0.75–0.97) | 0.71 (0.52–0.90) | 0.61 (0.18–1.05) |
| TeO-measure vs. Loge (Brain mass) | 0.79 (0.45–0.93) | 1.64 (0.84–2.44) | −9.35 (−11.16–7.54) |
| Eye-diameter vs. Loge (Brain mass) | 0.72 (0.33–0.90) | 1.31 (0.55–2.07) | −8.00 (−9.37 to −6.63) |
| Head length vs. Loge (Brain mass) | 0.70 (0.30–0.89) | 0.38 (0.15–0.60) | −7.23 (−8.20 to −6.26) |
| Body length vs. Loge (Brain mass) | 0.60 (0.14–0.85) | 0.06 (0.01–0.11) | −6.93 (−7.94 to −5.92) |