## 3 Results
Muskellunge proximity to shore in Spirit Lake (mean \(\pm\) SE = 273 \(\pm\) 12.2 m) nearly doubled compared to that in Lake Cornelia (mean \(\pm\) SE = 151 \(\pm\) 8.5 m); however, the effect of lake and interaction between lake-weeks poststocking was not significant (\(p>0.05\); Table 2). Muskellunge proximity to shore differed among weeks poststocking (\(p<0.001\); Table 2). At Lake Cornelia, Muskellunge were closer to shore during the first week poststocking (mean \(\pm\) SE = 54 \(\pm\) 14 m) and then moved further from shore between weeks 1 and 4 (mean \(\pm\) SE = 197 \(\pm\) 41 m; Figure 4). Muskellunge proximity to shore was similar between weeks 5 and 16. A similar pattern was observed at Spirit Lake where fish moved offshore between weeks 1 and 5 but then moved closer to shore between weeks 6 and 16 (Figure 3). The depth of location of Muskellunge ranged between 0.15 and 6.3 m (mean \(\pm\) SE = 3.17 \(\pm\) 0.10 m) and was deeper for Muskellunge in Spirit Lake (mean \(\pm\) SE = 3.69 \(\pm\) 0.10 m) than in Lake Cornelia (mean \(\pm\) SE = 2.34 \(\pm\) 0.10 m). Muskellunge depth differed among weeks and lakes (\(p<0.02\)), but the lake \(\times\) week interaction was insignificant (\(p=0.091\); Table 2). Muskellunge depth usage followed a similar pattern to proximity to shore as fish depth usage generally increased during weeks 1 to 5 and then either slightly decreased or was similar throughout the study (Figures 3 and 4). Muskellunge in both systems used SAV throughout the study (337 of 366 locations had SAV), and biovolume locations ranged from 0% to 100% of the water column (mean \(\pm\) standard deviation [SD] = 0.42 \(\pm\) 0.25; no biovolume comparisons were conducted for week 15 due to equipment failure at Lake Cornelia). Biovolume of location differed among lakes and weeks, and the interaction effect was significant (\(p<0.001\); Table 2). Biovolume was higher in Spirit Lake (mean \(\pm\) SD = 0.48 \(\pm\) 0.25) than in Lake Cornelia (mean \(\pm\) SD = 0.32 \(\pm\) 0.23), but for both lakes, biovolume of location was less during the first 4 weeks poststocking than those weeks that followed. For both lakes, Muskellunge biovolume of location generally followed a pattern of increasing SAV usage between stocking and weeks 8-10 and then steadily declined throughout the remainder of the study. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Source of Variation** & **Numerator d.f.** & **Denominator d.f.** & **F** & **\(p\)** \\ \hline Daily movement (m day\({}^{-1}\)) & & & & \\ Week & 15 & 295 & 5.01 & \textless{}0.001 \\ Lake & 1 & 60 & 0.11 & 0.745 \\ Lake \(\times\) Week & 15 & 60 & 1.47 & 0.147 \\ Proximity (m) to shore & & & & \\ Week & 15 & 310 & 3.12 & \textless{}0.001 \\ Lake & 1 & 60 & 3.77 & 0.057 \\ Lake \(\times\) Week & 15 & 60 & 1.77 & 0.061 \\ Depth (m) usage & & & & \\ Week & 15 & 308 & 1.94 & 0.019 \\ Lake & 1 & 60 & 10.52 & 0.002 \\ Lake \(\times\) Week & 15 & 60 & 1.63 & 0.091 \\ SAV biovolume (\%) & & & & \\ Week & 14 & 282 & 12.00 & \textless{}0.001 \\ Lake & 1 & 54 & 84.22 & \textless{}0.001 \\ Lake \(\times\) Week & 14 & 54 & 3.78 & \textless{}0.001 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Analysis of variance type III tests of the fixed effects of weeks poststocking and lake on daily movement rates, proximity to shore, depth usage, and the biovolume of submersed aquatic vegetation (SAV) where radio-tagged Muskellunge were located between May and September 2023 in two Iowa natural lakes. Figure 4: Muskellunge mean (black line) daily movement (m day\({}^{-1}\); **top left panel**), proximity to shore (m, **bottom left panel**), depth usage (m, **top right panel**), and percent submersed aquatic vegetation biovolume (height of aquatic plants within water column; **bottom right panel**) estimated from weekly tracking data of yearing Muskellunge stocked into Lake Cornelia, IA. Means with different letters are significantly different (\(p<0.05\); [PERSON]’s multiple mean comparison). Shaded vertical boxes represent 95% confidence intervals.