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Fig. 3 Canonical plot scores from discriminant analysis of SIA- derived data of yellow-phase European eels collected from three salinity zones in Lough Ahalia. Gaussian bivariate 95% confidence ellipses are centred on group centroids. The discriminant analysis was based on three Box—Cox- transformed variables: 6'°C, C:N (both lipid-treated) and baseline-corrected 5!°N

Figure 3 Canonical plot scores from discriminant analysis of SIA- derived data of yellow-phase European eels collected from three salinity zones in Lough Ahalia. Gaussian bivariate 95% confidence ellipses are centred on group centroids. The discriminant analysis was based on three Box—Cox- transformed variables: 6'°C, C:N (both lipid-treated) and baseline-corrected 5!°N

Related Figures (8)

Fig. 1 Lough Ahalia, showing location in Ireland and the three distinct salinity zones referred to in this study: freshwater (FW), brackish water (BW) and marine dominated (VW)
Fig. 1 Lough Ahalia, showing location in Ireland and the three distinct salinity zones referred to in this study: freshwater (FW), brackish water (BW) and marine dominated (VW)
Table 1 Summary statistics of yellow-phase European eel 6'°C, 5'°N and C:N ratios collected in fresh (FW), brackish (BW) and marin (MW) salinity zones NB Differences in the superscript characters following mean values indicate significant differences (P<0.05) between different salinity zones following Fisher’s LSD post-hoc tests of Box-Cox transformed data (untransformed data shown)
Table 1 Summary statistics of yellow-phase European eel 6'°C, 5'°N and C:N ratios collected in fresh (FW), brackish (BW) and marin (MW) salinity zones NB Differences in the superscript characters following mean values indicate significant differences (P<0.05) between different salinity zones following Fisher’s LSD post-hoc tests of Box-Cox transformed data (untransformed data shown)
Fig. 2 Isotope bi-plot comparing yellow eel 5'°C and 6'°N collected from three salinity zones in Lough Ahalia. Gaussian bivariate 95% confidence ellipses are centred on mean 6'°C and 65!°N values for each category Prior to all analyses, eel 5'°N data were baseline-cor- rected against P. antipodarum 6'°N. Snail 5'°N values could be considered isotopically identical in FW and
Fig. 2 Isotope bi-plot comparing yellow eel 5'°C and 6'°N collected from three salinity zones in Lough Ahalia. Gaussian bivariate 95% confidence ellipses are centred on mean 6'°C and 65!°N values for each category Prior to all analyses, eel 5'°N data were baseline-cor- rected against P. antipodarum 6'°N. Snail 5'°N values could be considered isotopically identical in FW and
NB Data were Box—Cox transformed prior to analysis Table 2 Standardised canonical coefficients for each of the two discriminant functions used to classify eels into FW, BW and MW salinity groups
NB Data were Box—Cox transformed prior to analysis Table 2 Standardised canonical coefficients for each of the two discriminant functions used to classify eels into FW, BW and MW salinity groups
Table 4 Classification matrix functions for the three salinity zones: FW, BW and MW
Table 4 Classification matrix functions for the three salinity zones: FW, BW and MW
Table 3 Classification functions for the three salinity zones: FW, BW and MW. NB: Data were Box—Cox transformed prior to analysis
Table 3 Classification functions for the three salinity zones: FW, BW and MW. NB: Data were Box—Cox transformed prior to analysis
Table 5 Summary statistics of various population parameters of yellow European eel collected in fresh (FW), brackish (BW) and marine (MW) salinity zones TL Total length (mm), weight (g), estimated age (years post elver check). NB Superscript letters following mean age values indicat significant differences following Fisher’s LSD post-hoc tests
Table 5 Summary statistics of various population parameters of yellow European eel collected in fresh (FW), brackish (BW) and marine (MW) salinity zones TL Total length (mm), weight (g), estimated age (years post elver check). NB Superscript letters following mean age values indicat significant differences following Fisher’s LSD post-hoc tests
Table 6 Parameters of Logl0 transformed linear regression of length—weight (NB: FW and BW data pooled as ANCOVA showed no significant differences)
Table 6 Parameters of Logl0 transformed linear regression of length—weight (NB: FW and BW data pooled as ANCOVA showed no significant differences)
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