## 3 Results
\begin{table}
\begin{tabular}{c c c c} \hline \hline  & _U. pinnatifida_ & _S. polyschides_ & _S. lattissima_ & _L. ochroleuca_ \\ \hline Ash (g 100 g\({}^{-1}\)) & 18.58 \(\pm\) 0.049 a & 20.89 \(\pm\) 0.035 b & 17.81 \(\pm\) 0.049 c & 18.33 \(\pm\) 0.07 d \\ Fat (g 100 g\({}^{-1}\)) & 0.63 \(\pm\) 0.099 a & 1.50 \(\pm\) 0.042 b & 1.52 \(\pm\) 0.106 b & 0.51 \(\pm\) 0.049 a \\ Fiber (g 100 g\({}^{-1}\)) & 8.8 \(\pm\) 0.085 a & 10.54 \(\pm\) 0.092 b & 6.39 \(\pm\) 0.127 c & 11.65 \(\pm\) 0.212 d \\ Protein (g 100 g\({}^{-1}\)) & 23.54 \(\pm\) 0.219 a & 14.01 \(\pm\) 0.064 b & 13.63 \(\pm\) 0.021 c d & 12.83 \(\pm\) 0.247 d \\ Nitrogen-Free Extractives (g 100 g\({}^{-1}\)) & 48.44 \(\pm\) 0.007 a & 53.05 \(\pm\) 0.057 b & 60.64 \(\pm\) 0.092 c & 56.68 \(\pm\) 0.028 d \\ Energy (Kcal/100 g) & 294 \(\pm\) 0.057 a & 282 \(\pm\) 0.431 b & 311 \(\pm\) 1.223 c & 283 \(\pm\) 0.643 b \\ Energy (KJ/100 g) & 1229 \(\pm\) 0.226 a & 1180 \(\pm\) 1.810 b & 1301 \(\pm\) 5.127 c & 1183 \(\pm\) 2.694 b \\ \hline \hline \end{tabular} a  
\end{table} 
Table 3: Nutritional characterization of the dried biomass of _U. pinnatifida_, _S. lattissima_, _L. ochroleuca_, and _S. polyschides_. Results are expressed in mean \(\pm\) standard error (_n_ = 2; dry weight basis). Statistically significant differences in the same element content among the species are expressed by different letters. Regarding the results, there are three different groups (Figure 2): the first composed of _Laminaria ochroleuca_ replicates (A), the second of _Sacchararina latissima_ replicates (B), and the third of _Sacchorizha polyschides_ and _Undaria pinmatifida_ replicates (C). There are also two replicates that may be considered as outliers (SL_R2 and SP_R3). The analysis shows a significant difference between groups A and C and between groups B and C. Regarding the differences between the groups A and C, EPA, \(\gamma\)-LA, and \(\alpha\)-LA were, in this order, the main FAs contributing to the differences between the groups. Regarding groups B and C, the same three FAs determined the main differences between both groups. Considering the main FAs contributing most for the similarity among each of the defined groups, both groups A and B present palmitic acid, oleic acid, and EPA as the main FAs contributing for that similarity, in that order of contribution; group C presents exactly the same three FAs as the main contributors for the similarity of the group, but in a different order, with palmitic acid being, as well, the main contributor, but followed by EPA and, finally, oleic acid. The average similarities and dissimilarities among and between the groups, as well as the main three FAs contributing to the similarities and dissimilarities among and between the groups, are presented in Tables 5 and 6, respectively. Considering each species individually, C16:0 was the most abundant fatty acid of _Laminaria ochroleuca_, contributing 21.09% of the species' total fatty acid content, followed by C18:1 (16.60%) and EPA and DHA in similar concentrations (13.84% and 13.58%, respectively). In _Sacchararina latissima_, C16:0 was also the most abundant FA (contributing19.88% of total FA), followed by C18:1 and EPA and C14:0 (18.70%, 12.87%, and 12.87 and 12.60%, respectively). _Sacchorizha polyschides_ and _Undaria pinmatifida_ showed C16:0 as the most abundant FA (contributing 19.10% of total FA content), followed by EPA (16.61%) and C18:1 (13.14%). Table 7 indicates the total phenolic content of the kelps evaluated, where _S. polyschides_ stands out for the highest content while _L. ochroleuca_ revealed the lowest content. Overall, the content varied among the species studied, revealing statistically significant differences among each other.