## 3 Results  
The variation in seawater pH and temperature in the control tank and the three experimental tanks is shown in Figure 3.  
A slight increase in water temperature was observed in the control tank and the tank with a decreased pH (\(\Delta\)pH), from a minimum of 12.2 \({}^{\circ}\)C to a maximum of 13.9 \({}^{\circ}\)C. In the tank with an elevated temperature (\(\Delta\)T) and the tank with a combined effect of temperature and pH change (\(\Delta\)pH), the temperatures were recorded to be 15.78 \(\pm\) 0.17 \({}^{\circ}\)and 15.76 \(\pm\) 0.15 \({}^{\circ}\)C, respectively. The mean pH values measured in the control tank and the tank with an increase in water temperature (\(\Delta\)T) were 7.97 \(\pm\) 0.10 and 7.97 \(\pm\) 0.08, while in the decreased pH (\(\Delta\)pH) tank and the tank with a combined effect of temperature and pH changes (\(\Delta\)pHT), they were noted to be 7.75 \(\pm\) 0.12 and 7.76 \(\pm\) 0.11, respectively. Certain parameters, such as a reduced pH or an increased temperature, did not individually affect mortality in the queen scallops, while a combination of these parameters negatively impacted the scallops' survival (Figure 4). The survival rate of the queen scallops, measured in the control tank and that exposed to a temperature increase and a pH decrease, remained above 97% over one month. In the tank with the combined effect of temperature and pH changes, the survival rate was noted to be under 90% at the end of the first week of the experiment. The mortality of the queen scallops during the second week of the experiment in the tank with the combined effect of temperature and pH was 17%, while in the third week, it increased to 23%, reaching 27% by the end of the experiment. A significant effect of the climate change conditions on weight growth rate was observed, while the effect on length growth was not significant (Kruskal-Wallis test, Table 1). A reduced pH or an increased temperature did not individually affect the growth rates of the queen scallops, while a combination of these parameters positively impacted the scallops' growth rates (Mann-Whitney U test, Figure 5). A decrease in the weight growth rate was observed in the queen scallops from the tanks with the individual effects of pH, with a value of 0.031 \(\pm\) 0.057 g/day, and temperature, of 0.052 \(\pm\) 0.166 g/day, while control queen scallops averaged with 0.067 \(\pm\) 0.114 g/day. An increase in the weight growth rate of queen scallops was observed in the tank with the combined effect of pH and temperature, with a value of 0.167 \(\pm\) 0.195 g/day, and was noted to be statistically different from that of the control (Mann-Whitney U test, \(p\) < 0.05). Figure 4: The survival rate of scallops kept in controlled, non-changed conditions (Con) and exposed to decreased pH (\(\Delta\)pH), increased temperature (\(\Delta\)T), and the combined effect of temperature and pH changes (\(\Delta\)pHT) for a month. The length growth rate of the queen scallops in the control tank was 0.077 \(\pm\) 0.229 mm/day. For the queen scallops, the minimal shell growth rate in terms of length was recorded to be 0.060 \(\pm\) 0.167 mm/day in the tank with a decreased pH, while the maximal weight growth rate was 0.267 \(\pm\) 0.369 mm/day in the tank with a changed pH and T and was statistically different from that of the control (Mann-Whitney U Test, \(p\) = 0.01). The weight growth rate of the queen scallops in the tank with a temperature increase was 0.076 \(\pm\) 0.167 g/day. The effect of the climate change conditions on the specific weight growth rate was not significant (Kruskal-Wallis test, Table 1). Under controlled conditions (Con), the scallops had an average specific growth rate of 1.089 \(\pm\) 0.084% (Figure 6). When exposed to a \begin{table}
\begin{tabular}{c c c c} \hline \hline  & **H** & **df** & **_p_** \\ \hline GRw & 10.15 & 3 & 0.01 \\ GRl & 5.11 & 3 & 0.16 \\ SGRw & 3.02 & 3 & 0.38 \\ FCR & 11.93 & 3 & 0.007 \\ PER & 10.92 & 3 & 0.006 \\ \hline \hline \end{tabular}
\end{table}