## 3 Results
\begin{table}
\begin{tabular}{l c c c c c c} \hline \hline  & \multicolumn{2}{c}{**Counts**} & \multicolumn{2}{c}{**Mean Length (cm)**} & \multicolumn{2}{c}{_p-Value_} \\ \cline{2-7}
**Species** & **Haul** & **Images** & **Catch** & **Images** & **Catch** & \multicolumn{1}{c}{_p-Value_} \\ \hline _Chub mackerel (Somber japonicus_) & 1 & 1 (1) & 21 (20) & 2000\% & 34.4 & 28.4 \(\pm\) 2.0 & - \\ _Chub mackerel (Somber japonicus_) & 2 & 5 (5) & 3 (3) & 67\% & 28.3 \(\pm\) 2.4 & 27.8 \(\pm\) 1.1 & 0.7147 \\ Glowbelly (_Acropoma japonicum_) & 1 & 13 (10) & 42 (30) & 223\% & 4.2 \(\pm\) 0.9 & 5.1 \(\pm\) 0.9 & **0.0111** \\ Glowbelly (_Acropoma japonicum_) & 2 & 227 (41) & 168 (30) & 35\% & 4.6 \(\pm\) 0.8 & 4.9 \(\pm\) 0.4 & 0.1656 \\ _Indian perch (Jaydia linetata_) & 1 & 18 (14) & 177 (30) & 883\% & 6.1 \(\pm\) 1.0 & 5.7 \(\pm\) 0.5 & 0.1907 \\ _Japanese fusing squid (Todarodes pacificus_) & 3 & 2 (1) & 2 (2) & 0\% & 39.8 & 37.6 \(\pm\) 3.0 & - \\ _Japanese jack mackerel (Trachurus japonicus_) & 1 & - & 4 (4) & - & - & 20.4 \(\pm\) 4.6 & - \\ _Japanese jack mackerel (Trachurus japonicus_) & 2 & 4 (3) & 13 (13) & 225\% & 18.1 \(\pm\) 1.0 & 24.1 \(\pm\) 1.9 & 0.4884 \\ _Japanese jack mackerel (Trachurus japonicus_) & 3 & 423 (244) & 327 (100) & 29\% & 25.8 \(\pm\) 3.1 & 27.5 \(\pm\) 3.3 & **0.0000** \\ _Juli dory (Zeus faber_) & 3 & 1 (1) & 1 (1) & 0\% & 31.6 & 30.3 & - \\ _Largehead hairtail (Trichurus lepturus_) & 1 & 123 (7) & 281 (100) & 128\% & 34.3 \(\pm\) 24.9 & 63 \(\pm\) 9.5 & **0.0228** \\ _Largehead hairtail (Trichurus lepturus_) & 2 & 4 (3) & 3 (3) & 33\% & 73.3 \(\pm\) 16.9 & 55.4 \(\pm\) 24.8 & 0.3600 \\ _Largehead hairtail (Trichurus lepturus_) & 3 & 93 (8) & 53 (53) & 75\% & 43.6 \(\pm\) 10.9 & 50.4 \(\pm\) 11.5 & 0.1265 \\ _Pacific rudderfish (Psenopsis anomalous_) & 1 & - & 4 (4) & - & 18.3 \(\pm\) 1.4 & - \\ _Pacific rudderfish (Psenopsis anomalous_) & 2 & 2 (2) & 4 (4) & 100\% & 19.8 \(\pm\) 1.56 & 18.5 \(\pm\) 0.9 & 0.3750 \\ _Pacific rudderfish (Psenopsis anomalous)_ & 3 & 1 (1) & 1 (1) & 0\% & 8.8 & 9.1 & - \\ _Sharptooth seabass (Synagroys philipinensis)_ & 2 & 37 (16) & 53 (30) & 43\% & 5.5 \(\pm\) 1.1 & 5.7 \(\pm\) 0.6 & 0.5314 \\ _Silver pomfret (Pamps arrest_) & 1 & 8 (5) & 29 (28) & 263\% & 18.3 \(\pm\) 3.6 & 18.3 \(\pm\) 1.9 & 0.9897 \\ _Skimynback lauternfish (Bentlosema pterotum)_ & 1 & 33 (5) & 610 (30) & 1748\% & 4.6 \(\pm\)1.1 & 5.2 \(\pm\) 0.6 & 0.3047 \\ _Slender ribbughfish (Trachipterus islikawae)_ & 3 & 1 (1) & 1 (0) & 0\% & - & - & - \\ _Sparames gernaudier (Caolarinchus multispinulos_) & 1 & - & 3 (3) & - & - & 15.3 \(\pm\) 2.6 & - \\ _Yellow croaker (Larimichtus polyactis_) & 1 & 87 (66) & 302 (100) & 247\% & 13.1 \(\pm\) 1.6 & 13.5 \(\pm\) 1.8 & 0.0863 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: List of species identified and quantified in the Deep Vision images and in the catch data. Figure 5 shows an echogram for a frequency of 38 kHz and the depth line of the scanmar sensors attached to the top and bottom of the net during haul03 mid-water trawl deployment. The fish schools detected by the scientific echosounder in the research area were irregularly distributed, and towing distance of Scientific Echo Sounder and mid-water trawls and fishing depth were considered for fishing (Figure 5). When fish schools in the same water layer were distributed in various water depths, the fish groups that can be caught at particular water depths were targeted. The average net height of the mid-water trawl when fishing was 26.7 m, and 33 fish schools were detected when towing the mid-water trawl. The average height of the detected fish schools within the mid-water trawl range was 2.6 m, which was in the range of 33.7 to 101.8 m in depth. In order to identify the spatiotemporal distributions of Japanese jack mackerel and largehead hairtail present in haul03, the population distribution of these species according to water depth was represented graphically using the towing depth data of mid-water trawl and time data from Deep Vision images (Figure 5).