Appendix G

Seamount Bathymetries

Takashi Yanagimoto National Research Institute of Far Seas Fisheries FRA Materials and Method

• Bathymetries of Koko, Kinmei, Yuryaku, Kammu, Colahan were made from 2006 survey data (GPS position data and fish founder data (KFS3000, Kaijo Co.,)). Bathymetries of Nintoku, Jingu, Ojin, Northern Koko were made from 2007 survey data (GPS position data and echo sounder data (KFS3000, Kaijo Co.,)). No authorization will be required to use these bathymetries. • Bathymetries of the other seamounts were drawn by Marine Explorer Ver4 (Environmental Simulation Laboratory Co. Ltd, http://www.esl.co.jp/index.htm). Authorization of this company will be required to use these bathymetries. Jimmu Seamount 169°00′E 20′ 40′

2000m 20′ 20′ No 1500m available

46°00′N 46°00′N 3D Map

Depth

169°00′E 20′ 40′ Red Line: 1500m, Purple Line: 2000m

0 5 10km North bank of Suiko Seamount 170°00′E 20′

46°00′N 46°00′N

2000m No 1500m available 40′ 40′ 3D Map

170°00′E 20′ Depth 0 5 10km Red Line: 1500m, Purple Line: 2000m South bank of Suiko Seamount 40′ 170°00′E 20′ 40′

No 40′ 40′

1000m 1500m 2000m available

20′ 20′ 3D Map

Depth 44°00′N 44°00′N Black Line: 1000m, Red Line: 1500m, 40′ 170°00′E 20′ 40′ Purple Line: 2000m

0 10 20km Showa Seamount 170°00′E 20′ 40′

20′ 20′ No 2000m available 43°00′N 43°00′N 3D Map

Depth 170°00′E 20′ 40′ Purple Line: 2000m

0 10 20km Youmei Seamount 170°00′E 20′ 40′

40′ 40′ No

20′ 20′ available

1500m 3D Map 2000m

42°00′N 42°00′N Depth 170°00′E 20′ 40′ Red Line: 1500m, Purple Line: 2000m

0 10 20km Nintoku Seamount

20′ 40′ 171°00′E

2000m

1000m 20′ 20′

41°00′N 41°00′N

1500m Depth 40′ 40′

2000m Black Line: 1000m, Red Line: 1500m, 20′ 40′ 171°00′E Purple Line: 2000m

0 10 20km Jingu Seamount 171°00′E 20′

1500m

40′ 40′

1000m

2000m

Depth

171°00′E 20′ Black Line: 1000m, Red Line: 1500m,

0 5 10km Purple Line: 2000m Ojin Seamount 170°00′E 20′ 40′ 171°00′E 20′

20′ 20′

1000m

38°00′N 2000m 38°00′N

1500m

40′ 40′

170°00′E 20′ 40′ 171°00′E 20′ Depth 0 10 20km Black Line: 1000m, Red Line: 1500m, Purple Line: 2000m Northern Koko

20′ 40′

1000m

40′1500m 40′

2000m

20′ 40′ Depth 0 5 10km Black Line: 1000m, Red Line: 1500m, Purple Line: 2000m Koko Seamount 171°00′E 20′ 40′ 172°00′E

40′ 40′

1000m 500m 2000m

2000m 20′ 20′

35°00′N 35°00′N

1000m

40′ 1500m 40′ 2000m

Depth 171°00′E 20′ 40′ 172°00′E Blue Line: 500m, Black Line: 1000m, 0 10 20km Red Line: 1500m, Purple Line: 2000m Kinmei Seamount et al.

20′ 40′ 172°00′E

2000m 1000m 1500m 40′ 40′

20′ 20′

33°00′N 33°00′N Depth 20′ 40′ 172°00′E 0 10 20km Black Line: 1000m, Red Line: 1500m, Purple Line: 2000m Yuryaku Seamount

172°00′E 20′

33°00′N 33°00′N

1000m

40′ 40′ 500m

1500m 2000m

Depth Blue Line: 500m, Black Line: 1000m, 172°00′E 20′ Red Line: 1500m, Purple Line: 2000m 0 5 10km Kammu Seamount 40′ 173°00′E 20′

North bank 20′ 20′

500m

1000m

32°00′N 2000m 32°00′N South bank Depth Blue Line: 500m, Black Line: 1000m, 40′ 173°00′E 20′ Red Line: 1500m, Purple Line: 2000m 0 5 10km Colahan Seamount 40′ 176°00′E

500m 31°00′N2000m1500m 1000m 31°00′N

Depth 40′ 176°00′E Blue Line: 500m, Black Line: 1000m, Red Line: 1500m, Purple Line: 2000m 0 5 10km C-H Seamount

20′ 40′ 178°00′E

40′ 40′ No

2000m

1000m 1500m 20′ 20′ available 3D Map

30°00′N 30°00′N

Depth 20′ 40′ 178°00′E Blue Line: 500m, Black Line: 1000m, 0 10 20km Red Line: 1500m, Purple Line: 2000m Hancock Seamount

20′ 40′ 179°00′E 20′ 40′

20′ 20′ 2000m North bank 1000m No 30°00′N 30°00′N available

South 40′ bank 40′ 3D Map

K bank 20′ 40′ 179°00′E 20′ 40′ Depth Blue Line: 500m, Black Line: 1000m, 0 10 20km Red Line: 1500m, Purple Line: 2000m North bank of Hancock 20′ 40′ 179°00′E

No 20′ 20′ 2000m

1500m 500m 1000m available 3D Map

30°00′N 30°00′N

20′ 40′ 179°00′E Depth 0 5 10km Blue Line: 500m, Black Line: 1000m, Red Line: 1500m, Purple Line: 2000m South bank and k bank of Hancock

South bank No available 3D Map

Depth Black Line: 1000m, Red Line: K bank 1500m, Purple Line: 2000m

The position and depth of K bank is not clear in the contour data of ME. Reference

• Clague DA. Dalrymple GB, Green HG, Wald D, Knono M, Kroenke LW, 1980. Bathymetry of the Emperor Seamounts. In: JacksonED, Koisumi I, et al., Initial reports of the Deep Sea Drilling Project, Vol55. US Govt. Printing Office, Washinton, DC., foldout chart. • Davies TA, Wilde P, Clague DA., 1972. Koko Seamount: A major guyot at the Southern end of the Emperor seamounts. Mar. Geol., 13: 311-321. • Smoot N. Christian. 1986. Bathymetric atlas of norht Pacific Guyots. University of Southern Mississippi. pp129. • Smoot N. Christian. 1985. Guyot and seamount morphology and tectonics of the Hawaiian-Emperor elbow by multi-beam sonar. Mar. Geol., 64: 203-215. • Smoot N. Christian. 1991. North Pacific Guyots. Naval Oceanographic Office. Technical note. pp96.