Marine Debris Survey at a Beach in Miyako Island
Date Monitored: October 3, 2010 Beach Size: 100-105 meters x 10-12 meters
Surrvey Conducted by: Dr. Satoshi Oshiro & eight members Sampling Unit: 100 meters x 10 meters
Beach Name: Karimata in Miyako Island, Okinawa, Japan Beach Usage: Rural
Beach ID (Lati./Long): 24.893743, 125.281442 (Center of sample unit) River/Creek input: No
Total Number and Weight of Debris Items Collected from Survey Site
(Sampling Units: 100m x 10 m. Start point: 24.893717, 125.281874 End point: 24.893933, 125.281107)
 
Types of Debris
Quantity
 %
Weight (kg)
%
Country-by-Country
            J=Japan, C=China, T=Taiwan, K=Korea, U=unknown
Fishing Gears:
 
          
1.
 Fishing net
inextricable
  
22.00
 8.44%
J   C   T   K   U  
2.
 Fishing lines
18
 1.17%
0.75
  
J   C   T   K   U 18
3.
 Fishing floats and quills
152
 9.90%
45.20
 17.34%
J   C   T   K   U 152
4.
 Crab pot and traps
3
 0.20%
21.50
 8.25%
J   C   T   K   U 3
5.
 Ropes
inextricable
  
17.00
 6.52%
J   C   T   K   U  
6.
 EPS Fish box or foam-filled fish box
multiple
  
34.90
 13.39%
J   C   T   K   U  
 
 
 
Plastic Products*
 
 
7.
 6 Pack holders
 
 
J   C   T   K   U  
8.
 Plastic bags
47
 3.06%
0.40
 0.15%
J   C   T   K   U 47
9.
 Caps, lids, pull tabs
 
 
J   C   T   K   U  
10.
 Plastic cups, knives, forks, spoons
 
 
J   C   T   K   U  
11.
 Food wrappers, sandwich bags
 
 
J   C   T   K   U  
12.
 Plastic containers
 
 
J   C   T   K   U  
13.
 Straws, stirrers
 
 
J   C   T   K   U  
14.
 Beverage bottles
1248
 81.30%
51.00
 19.56%
J 91 C 670 T 52 K 46 U 389
15.
 Balloons
 
 
J   C   T   K   U  
16.
 Plastic Baskets
3
 0.20%
7.50
 2.88%
J   C   T   K 1 U 2
17.
 Plastic pieces
multiple
  
25.00
 9.59%
J   C   T   K   U  
   
 
 
Other Debris:
 
 
18.
 Cigarette filters
 
 
J   C   T   K   U  
19.
 Cigarette lighters
 
 
J   C   T   K   U  
20.
 Tires
1
 0.07%
7.50
 2.88%
J   C   T   K   U 1
21.
 Light bulbs
8
 0.52%
0.70
 0.27%
J   C   T   K 1 U 7
22.
 Rubber pieces
multiple
  
5.50
 2.10%
J   C   T   K   U  
23.
 Slippers
17
 1.10%
3.00
 1.15%
J   C   T   K   U 17
24.
 Cable Sleeves
multiple
  
4.50
 1.73%
J   C   T   K   U  
25.
 Glass bottles
37
 2.41%
15.00
 5.75%
J   C 10 T   K   U 27
26.
 Syringes
1
 0.07%
 
J   C 10 T   K   U 1
27. Soda cans 1     0.00%
J 1 C   T   K   U  
28. Cans 1   0.60 0.00%
J   C   T   K   U 1
  TOTAL
1535
 100%
262.05
 100%
J 92 C 690 T 52 K 48 U 665
   
Density Survey (Sample Unit: One SQ meters Quadrat Located at 24.893755, 125.281346)
 
Types of Debris
Quantity
 %
Weight (g)
 %

Country-by-Country
a. Plastic beverage bottles 6 7.69% 200 2.70%
J 1 C 3 T   K   U 2
b. Plastic containers 1 1.28% 110 1.49%
J   C   T   K   U 1
c. Plastic bags        
J   C   T   K   U  
d. EPS Fish box or foam-filled fish box 27 34.62% 140 1.90%
J   C   T   K   U 27
e. Fishing lines, fishing gears        
J   C   T   K   U  
f. Fishing floats and quills 5 6.41% 280 3.79%
J   C 2 T   K 2 U 1
g. Fishing net & ropes 10 12.82% 5550 75.15%
J   C   T   K   U 5
h. Rubber slippers, sandals 3 3.85% 130 1.76%
J   C   T   K   U 3
i. Soda cans 1 1.28% 30 0.41%
J 1 C   T   K   U  
j. Plastic pieces 24 30.77% 270 3.66%
J   C   T   K   U 24
k. Rubber pieces multiple   65 0.88%
J   C   T   K   U  
l. PP foam pieces multiple   20 0.27%
J   C   T   K   U  
m. Cans 1 1.28% 590 7.99%
J   C   T   K   U 1
  TOTAL 78 100% 7385 100%
J 2 C 5 T   K 2 U 64
 
Micro Debris Survey (One SQ meters Quadrat Located at 24.893755, 125.281346)
  Size break down Quantity Weight (g) % (Qty)
1. P <0.99mm 665 600 38%
2. 1mm < P < 2.9mm 526 5,700 30%
3. 3mm < P < 4.9mm 262 2,100 15%
4. 5mm < P <6.9mm 203 4,300 13%
5. 7mm < P < 9.9mm   75   7,800 4%
  TOTAL 1,731 20,500 100%
Data for classification of micro debris and plastic material identification
are also available.
 
Identify Nurdles (Pre-Production Plastic Pellets found in the One SQ meters Quadrat Located at 21.893755, 125-281346)
Nurdles are one of the largest contributors to marine debris and often called toxic meal for fish and other marine life.
  Type of Nurdle Quantity Weight(mg) % (Qty)
1. Plastic Pellets 41 700 55.4%
2. Recycled Plastic Pellets 33 600 44.6%
  TOTAL 74 1,300 100%
 
Methods of Disposal Applied
  Type of Debris Method of
Disposal 		Amount
Disposed (kg) 		Name Facility Ratio of
Incineration 		Ratio of
Recycle
1. Plastic beverage bottles Incinerated 51.00 Miyakojima City Municipal
Incineration Facility (MCMIF) 		19.46%  
2. Fishing floats and quills Incinerated 45.20 MCMIF 17.25%  
3. Fishing net Incinerated 22.00 MCMIF 8.40%  
4. Fishing lines Incinerated 0.75 MCMIF 0.29%  
5. EPS Fish box or foam-filled fish box Incinerated 34.90 MCMIF 13.32%  
6. Plastic bags Incinerated 0.40 MCMIF 0.15%  
7. Ropes Incinerated 17.00 MCMIF 6.49%  
8. Plastic baskets Incinerated 7.50 MCMIF 2.86%  
9. Plastic pieces Incinerated 25.00 MCMIF 9.54%  
10. Rubber pieces Incinerated 5.50 MCMIF 2.10%  
11. Tires Recycled 7.50 Miyakojima City Municipal Holding
Facility for Recycle (MCMHFR) 		  2.86%
12. Slippers Incinerated 3.00 MCMIF 1.14%  
13. Cable Sleeves Incinerated 4.50 MCMIF 1.72%  
14. Light bulbs Incinerated 0.70 MCMIF 0.27%  
15. Glass bottles Recycled 15.00 MCMHFR   5.72%
16. Cans Recycled 0.60 MCMHFR   0.23%
17. Crab pot and traps Recycled 21.50 MCMHFR   8.20%
18. Syringes Incinerated 0.00 MCMIF 0.00%  
  TOTAL   262.05   82.99%
(217.45kg ) 		17.01%
(44.6kg)
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