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Table 2 Outline of the survey

From: Resource investigation for Kichiji rockfish by autonomous underwater vehicle in Kitami-Yamato bank off Northern Japan

  TS_073 TS_074 TS_076 TS_077 TS_079
Depth (m) 143 - 144 1,045 – 1,050 652 - 757 305 - 498 561 – 566
Location (lat.) N 144°40.5′ N 144°39.0′ N 144°54.0′ N 144°51.0′ N 144°37.2′
Location (long.) E 144°11.5′ E 144°20.0′ E 144°26.4′ E 144°24.0′ E 144°17.0′
Cruising speed (m/s) 0.12 0.12 0.12 0.12 0.12
Cruising height (m) 2.1 2.5 2.5 2.5 2.5
Route type Grid Grid Straight Straight Straight
Duration (h) 4.0 6.0 4.8 6.4 3.3
Observation area (m2) 340 2,600 3,400 5,500 440
Photography number 158 1,593 1,310 2,077 159
Number of kichiji 0 2 23 2 10
Density of kichiji (/ha) 0 0 68 4 227