107
Table 2
Properties of marine debris items extracted by the primary analysis
ID
Site name
Dive no.
No. of debris
items
Debris per
km
2
Types of
debris (%) Wood, paper
Cans,
bottles
Plastics,
packages
Steel,
concrete
Fabrics,
cloth
Nets,
cables
Others
1
Off Minamisanriku-cho
CRM005
8
15,009
50
13
0
13
13
0
13
2
Off Kamaishi (canyon)
CRM006
7
5,627
29
14
29
0
0
0
29
4
Off Otsuchi (canyon)
CRM008
9
2,710
78
0
11
0
0
0
11
5
Yamada Bay
CRM009
2
954
0
0
0
0
0
100
0
6
Yamada Bay
CRM010
6
2,267
17
17
0
33
0
17
17
7
Bacterial mat site
YKDT147
24
2,618
21
4
17
8
0
0
50
9
39 N site, Japan Trench
YKDT148
9
999
0
0
33
0
0
11
56
10
Crack site, Japan Trench
YKDT149
0
0
–
11
Animal site, Japan Trench
YKDT150
6
712
50
17
0
0
0
0
33
12
Submarine canyon off
Miyako
YKDT151
226
6,274
15
12
17
1
2
8
46
13
39 N site, Japan Trench
YKDT152
6
1,253
33
0
17
0
0
0
50
14
Off Oshika peninsula
DT-6C
31
1,199
29
10
0
23
0
3
35
15
Off Oshika Peninsula
DT-7C
26
1,368
31
0
12
8
8
0
42
16
Off Sendai Bay
DT-8C
3
261
0
0
33
0
0
0
67
17
Off Kesennuma
DT-9C
1
309
0
0
0
0
0
0
100
18
Off Kamaishi (canyon)
DT-10C
146
6,790
6
20
22
4
4
3
41
19
Off Kamaishi (canyon)
DT-11C
84
12,406
2
19
33
4
15
0
26
21
Off Iwate
0
0
–
22
Off Miyagi
0
0
–
23
Off Miyagi
2
0
Not distinguishable
24
Hirota Bay
1,148
765
Not distinguishable
25
Okirai Bay
506
1,687
Not distinguishable
26
Tōni Bay
530
379
Not distinguishable
IDs of bold-type letters are our main focus
Distribution of the Marine Debris on Seafl oor from the Primary Report of Five…