## 3 Results  
There were no differences in water temperature, pH, and dissolved oxygen (DO) among treatments (\(p>0.05\)). Ammonium and nitrates levels were significantly higher in T3. Likewise, nitrite levels were higher in T2 and T3 compared to the T1 treatment (Table 1). Table 2 shows the results obtained after 157 days of experimentation. Total fish weight showed a tendency to decrease, although not significantly, with increasing stocking density; the highest average (126.66 \(\pm\) 42.71 g) was obtained in the lowest culture density treatment T1 (10 fish m\({}^{-3}\)) and the lowest in the 50 fish m\({}^{-3}\) treatment (97.87 \(\pm\) 44.75). DWG showed statistical differences (\(p<0.05\)) and the lowest average (0.48 \(\pm\) 0.08) was obtained in the highest stocking density treatment (T3). Regarding NY, the treatment with the highest stocking density (T3) had the highest average (\(p<0.05\)) with respect to the other treatments. The FCR also showed significant differences (\(p<0.05\)) in the lowest stocking density treatment (T1). In the case of survival, there were no significant differences. \begin{table}
\begin{tabular}{c c c c} \hline
**PARAMETERS** & **T1 (10 org m\({}^{-3}\))** & **T2 (30 org m\({}^{-3}\))** & **T3 (50 org m\({}^{-3}\))** \\ \hline \multicolumn{4}{c}{FISHES} \\ \hline Initial weight (g) & 21.32 \(\pm\) 8.73 & 22.80 \(\pm\) 9.46 & 20.83 \(\pm\) 10.06 \\ Final weight (g) & 123.66 \(\pm\) 42.71 & 113.04 \(\pm\) 43.91 & 97.87 \(\pm\) 44.75 \\ Initial length (cm) & 10.78 \(\pm\) 1.63 & 10.87 \(\pm\) 1.61 & 10.55 \(\pm\) 1.85 \\ Final length (cm) & 20.53 \(\pm\) 2.43 & 20.32 \(\pm\) 2.58 & 19.05 \(\pm\) 2.64 \\ Daily increase in weight & & & \\ (g fish\({}^{-1}\) day\({}^{-1}\)) & 0.64 \(\pm\) 0.07 a & 0.56 \(\pm\) 0.06 ab & 0.48 \(\pm\) 0.08 b \\ Net yield (g m\({}^{-3}\)) & 974 \(\pm\) 109 a & 2404 \(\pm\) 167 b & 3329 \(\pm\) 151 c \\ Feed conversion rate & 1.41 \(\pm\) 0.15 a & 1.87 \(\pm\) 0.12 b & 1.88 \(\pm\) 0.08 b \\ Survival (\%) & 100 \(\pm\) 0.0 & 94 \(\pm\) 9.6 & 91 \(\pm\) 5.3 \\ \hline \multicolumn{4}{c}{PLANTS} \\ \hline Initial weight (g) & 1.13 \(\pm\) 0.38 & 1.35 \(\pm\) 0.42 & 1.3 \(\pm\) 0.47 \\ Final weight (g) & 4.29 \(\pm\) 1.55 a & 6.06 \(\pm\) 2.58 b & 9.01 \(\pm\) 3.84 c \\ Root/Shoot & 0.16 \(\pm\) 0.07 & 0.18 \(\pm\) 0.06 & 0.15 \(\pm\) 0.02 \\ \hline \end{tabular}
\end{table} 
Table 2: Values obtained after 157 days of experimentation for total weight (g), total length (cm), daily weight gain (g fish\({}^{-1}\) day\({}^{-1}\)), net yield (g m\({}^{-3}\)), feed conversion rate, and survival (%) in _Dormitator latifrons_ fish and total weight (g) and root/shoot ratio in _Beta vulgaris_. Treatments with different superscripts represent significant differences (\(p<0.05\)). T1 (\(n=24\)), T2 (\(n=70\)), T3 (\(n=108\)). \begin{table}
\begin{tabular}{c c c c} \hline
**PARAMETERS** & **T1 (10 org m\({}^{-3}\))** & **T2 (30 org m\({}^{-3}\))** & **T3 (50 org m\({}^{-3}\))** \\ \hline \multicolumn{4}{c}{FISHES} \\ \hline Initial weight (g) & 21.32 \(\pm\) 8.73 & 22.80 \(\pm\) 9.46 & 20.83 \(\pm\) 10.06 \\ Final weight (g) & 123.66 \(\pm\) 42.71 & 113.04 \(\pm\) 43.91 & 97.87 \(\pm\) 44.75 \\ Initial length (cm) & 10.78 \(\pm\) 1.63 & 10.87 \(\pm\) 1.61 & 10.55 \(\pm\) 1.85 \\ Final length (cm) & 20.53 \(\pm\) 2.43 & 20.32 \(\pm\) 2.58 & 19.05 \(\pm\) 2.64 \\ Daily increase in weight & & & \\ (g fish\({}^{-1}\) day\({}^{-1}\)) & 0.64 \(\pm\) 0.07 a & 0.56 \(\pm\) 0.06 ab & 0.48 \(\pm\) 0.08 b \\ Net yield (g m\({}^{-3}\)) & 974 \(\pm\) 109 a & 2404 \(\pm\) 167 b & 3329 \(\pm\) 151 c \\ Feed conversion rate & 1.41 \(\pm\) 0.15 a & 1.87 \(\pm\) 0.12 b & 1.88 \(\pm\) 0.08 b \\ Survival (\%) & 100 \(\pm\) 0.0 & 94 \(\pm\) 9.6 & 91 \(\pm\) 5.3 \\ \hline \multicolumn{4}{c}{PLANTS} \\ \hline Initial weight (g) & 1.13 \(\pm\) 0.38 & 1.35 \(\pm\) 0.42 & 1.3 \(\pm\) 0.47 \\ Final weight (g) & 4.29 \(\pm\) 1.55 a & 6.06 \(\pm\) 2.58 b & 9.01 \(\pm\) 3.84 c \\ Root/Shoot & 0.16 \(\pm\) 0.07 & 0.18 \(\pm\) 0.06 & 0.15 \(\pm\) 0.02 \\ \hline \end{tabular}
\end{table}