Fig. 3a,b. Ordination biplot for Principal Component Analysis based on (A) species identity and (B) the accuracy of the measurement.

Reproducibility (inter-gauger agreement) –

The Intraclass Correlation Coefficients (ICCs) indicated that the reproducibility of the examined 21 morphometric characters varied between R=0.872 and R=0.471 (mean R=0.690) when the inter-gauger agreement was considered across the 11 gaugers (Table 2). Reproducibility of 16 characters out of the total 21 were acceptable. Five morphometric traits (EL, FRS, NOL, PoOC, PPL) were found to be slightly reproducible, with intraclass correlation coefficient (R) scores between 0.471 to 0.526 (Table 2). These scores belong to physically smaller traits in the observed character pool, hence we examined to what extent absolute character size affects the reproducibility. The general linear model returned no significant correlation (R = 0.3617, p = 0.1071) between the trait size and ICC scores.
Table 2. Repeatability scores (R) calculated for each character.