## 3 Results  
The values of growth, body parameters, and proximate nutritional value of _T. molitor_ larvae reared at different temperatures are presented in Table 1. Larvae emerged from eggs and grew faster at higher temperatures. While larvae in groups reared at 22 \({}^{\circ}\)C were harvested after \(\sim\)108 days, the larvae at 28 \({}^{\circ}\)C reached their terminal stage in 47 days. Therefore, with increasing temperature, there was a significant decrease in the time interval from oviposition to larval emergence and harvesting. The body weight of the larvae reached its maximum at 28 \({}^{\circ}\)C (increased by 67%) (Figure 1); however, the larval body length (Figure 2) was the highest at 25 \({}^{\circ}\)C. Statistical evaluation (\(p<0.05\)) showed that there was a statistically significant difference in body weight between 22 and 25 \({}^{\circ}\)C and between 22 and 28 \({}^{\circ}\)C and in the body length at all rearing temperatures of _T. molitor_ larvae. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Parameter** & **22 \({}^{\circ}\)C** & **25 \({}^{\circ}\)C** & **28 \({}^{\circ}\)C** \\ \hline Weight (g) & 0.09 \(\pm\) 0.03 a & 0.15 \(\pm\) 0.03 b & 0.15 \(\pm\) 0.04 c \\ Length (cm) & 1.99 \(\pm\) 0.40 a & 2.49 \(\pm\) 0.20 c & 2.26 \(\pm\) 0.30 b \\ Dry matter (g/100 g FW) & 30.72 \(\pm\) 1.29 a & 32.35 \(\pm\) 2.70 b & 36.55 \(\pm\) 0.79 c \\ Ash (g/100 g DM) & 3.47 \(\pm\) 0.44 b & 2.85 \(\pm\) 0.73 a & 5.65 \(\pm\) 0.26 c \\ Fat (g/100 g DM) & 22.46 \(\pm\) 3.54 a & 27.32 \(\pm\) 4.62 b & 36.01 \(\pm\) 3.31 c \\ Crude protein (g/100 g DM) & 64.34 \(\pm\) 2.98 c & 56.91 \(\pm\) 6.29 b & 54.41 \(\pm\) 2.47 a \\ First emergence of larvae (days) & 10.00 \(\pm\) 2.87 a & 7.50 \(\pm\) 5.54 ab & 5.78 \(\pm\) 1.69 b \\ Terminal larval stage (days) & 107.66 \(\pm\) 12.10 a & 84.41 \(\pm\) 13.18 b & 47.43 \(\pm\) 6.61 c \\ \hline DM = dry matter, FW = fresh weight. Superscripts in the same row represent a significant difference (\(p\leq 0.05\)). & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Growth parameters and proximate composition of _T. molitor_ larvae reared at different temperatures. Figure 1: The effect of rearing temperature on the body weight of yellow mealworm larvae. The highest contents of dry matter and ash were measured for the mealworms reared at 28 \({}^{\circ}\)C, whereas the lowest values were obtained in those reared at 22 \({}^{\circ}\)C in the case of DM (Figure 3) and at 25 \({}^{\circ}\)C in the case of the ash content (Figure 4). The dry matter content increased by 19% based on the comparison of samples reared at the lowest and highest temperatures. There was a statistically significant difference (\(p<0.05\)) in dry matter between the temperatures of 22 and 28 \({}^{\circ}\)C and between the temperatures of 25 and 28 \({}^{\circ}\)C (Figure 3). In the case of ash, there was a significant difference in the values at all rearing temperatures (Figure 4). Figure 3: The effect of rearing temperature on the dry matter content of yellow mealworm larvae. Figure 2: The effect of rearing temperature on the body length of yellow mealworm larvae. Concerning the main nutrients, the fat content increased with increasing temperature (Figure 5). The difference between the minimum and maximum average values was 9.49 g/100 g fresh weight, and there was a significant difference in fat content per unit DM (\(p<0.05\)) at all rearing temperatures. A positive correlation was observed between the rearing temperature and fat content (R = 0.8413). On the other hand, the most appropriate rearing temperature for obtaining a high protein content was determined to be 22 \({}^{\circ}\)C (Figure 6). A negative correlation was observed between the crude protein content per unit DM and temperature (R = \(-0.6577\)). The protein content of the samples reared at 28 \({}^{\circ}\)C decreased by 15% compared with that of larvae reared at the lowest temperature.