## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c} \hline \hline  & _Serranus atricaunda_ & _Sparisoma cretense_ \\ \hline North, San Andres & 0.414 & 0.124 \\ North, South & 0.266 & 0.001 * \\ San Andres, South & 0.813 & 0.001 * \\ \hline \hline \end{tabular}  
* Statistical significative differences.  
\end{table} 
Table 6: Results of the two-way PERMANOVA analyzing the variation in the content of heavy metals and trace elements in liver tissue in species according to study zone, considering the level of the factor “Species”. Figure 3: Boxplot of the two species in each sampling area for Al, Cd, K and Pb. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{3}{c}{_Serranus atricauda_} & \multicolumn{3}{c}{_Sparisoma cretense_} \\ \hline  & **North, San** & **North,** & **San Andres,** & **North, San** & **North,** & **San Andres,** \\  & **Andres** & **South** & **South** & **Andres** & **South** & **South** \\ \hline Al & 0.627 & 0.412 & 0.43 & 0.319 & 0.001 * & 0.001 * \\ B & 0.393 & 0.423 & 0.744 & 0.162 & 0.001 * & 0.024 * \\ Ba & 0.048 * & 0.019 * & 0.835 & 0.003 * & 0.001 * & 0.001 * \\ Ca & 0.309 & 0.449 & 0.579 & 0.469 & 0.001 * & 0.023 * \\ Cd & 0.58 & 0.368 & 0.221 & 0.459 & 0.023 * & 0.042 * \\ Cu & 0.83 & 0.816 & 0.602 & 0.142 & 0.002 * & 0.001 * \\ Fe & 0.905 & 0.745 & 0.89 & 0.153 & 0.001 * & 0.008 * \\ K & 0.29 & 0.027 * & 0.747 & 0.56 & 0.001 * & 0.001 * \\ Li & 0.613 & 0.312 & 0.943 & 0.195 & 0.898 & 0.254 \\ Mg & 0.517 & 0.594 & 0.795 & 0.008 * & 0.001 * & 0.226 \\ Mn & 0.18 & 0.008 * & 0.973 & 0.044 * & 0.001 * & 0.007 * \\ Mo & 0.968 & 0.099 & 0.262 & 0.956 & 0.038 * & 0.048 * \\ Na & 0.721 & 0.342 & 0.412 & 0.15 * & 0.001 * & 0.001 * \\ Ni & 0.929 & 0.104 & 0.409 & 0.299 & 0.004 * & 0.001 * \\ Pb & 0.569 & 0.1 & 0.375 & 0.003 * & 0.001 * & 0.001 * \\ Zn & 0.41 & 0.197 & 0.893 & 0.43 & 0.002 * & 0.001 * \\ \hline \hline \end{tabular}
* Statistical significative differences.  
\end{table} 
Table 7: Results of pairwise tests examining the significant factor of ‘Zones’ obtained in the two-way PERMANOVA analyzing the variation in the content of heavy metals and trace elements in liver tissue in species according to study zone, considering the level of the factor “Species”. \begin{table}
\begin{tabular}{c c c c} \hline \hline  & **North** & **San Andres** & **South** \\ \hline _Serranus atricauda_ & & & & \\ _Sparisoma cretense_ & & & & \\ \hline Al & 0.006 * & 0.075 & 0.558 \\ B & 0.167 & 0.568 & 0.001 * \\ Ba & 0.553 & 0.001 * & 0.003 * \\ Ca & 0.998 & 0.482 & 0.001 * \\ Cd & 0.007 * & 0.002 * & 0.001 * \\ Cu & 0.566 & 0.105 & 0.003 * \\ Fe & 0.465 & 0.588 & 0.001 * \\ K & 0.015 * & 0.881 & 0.001 * \\ Li & 0.42 & 0.382 & 0.874 \\ Mg & 0.378 & 0.339 & 0.002 * \\ Mn & 0.002 * & 0.98 & 0.001 * \\ Mo & 0.205 & 0.347 & 0.018 * \\ Na & 0.01 * & 0.469 & 0.001 * \\ Ni & 0.064 & 0.096 & 0.023 * \\ Pb & 0.935 & 0.008 * & 0.029 * \\ Zn & 0.833 & 0.804 & 0.001 * \\ \hline \hline \end{tabular}
* Statistical significative differences.  
\end{table} 
Table 8: Results of the two-way PERMANOVA analyzing the variation in the content of heavy metals and trace elements in liver tissue in species according to study zone, considering the level of the factor “Zones”. \begin{table}
\begin{tabular}{c c c} \hline \hline  & **North** & **San Andres** & **South** \\ \hline _Serranus atricauda_ & & & \\ _Sparisoma cretense_ & & & \\ \hline Al & 0.006 * & 0.075 & 0.558 \\ B & 0.167 & 0.568 & 0.001 * \\ Ba & 0.553 & 0.001 * & 0.003 * \\ Ca & 0.998 & 0.482 & 0.001 * \\ Cd & 0.007 * & 0.002 * & 0.001 * \\ Cu & 0.566 & 0.105 & 0.003 * \\ Fe & 0.465 & 0.588 & 0.001 * \\ K & 0.015 * & 0.881 & 0.001 * \\ Li & 0.42 & 0.382 & 0.874 \\ Mg & 0.378 & 0.339 & 0.002 * \\ Mn & 0.002 * & 0.98 & 0.001 * \\ Mo & 0.205 & 0.347 & 0.018 * \\ Na & 0.011 * & 0.469 & 0.001 * \\ Ni & 0.064 & 0.096 & 0.023 * \\ Pb & 0.935 & 0.008 * & 0.029 * \\ Zn & 0.833 & 0.804 & 0.001 * \\ \hline \hline \end{tabular}
* Statistical significative differences.  
\end{table}