An analysis on catch of the shrimp beam trawl fishery in Korea coastal sea

1970 , 1970 J. Kor. Soc. Fish. Tech., 45(1), 1 13, 2009

DOI:10.3796/KSFT.2008.45.1.001

An analysis on catch of the shrimp beam trawl fishery in Korea coastal sea

Choong-Sik J ANG *, Youn-Hyoung C HO , Chae-Rok L IM , Bo-Yeon K IM and Young-Su A N

Institute of Marine Industry, Gyeongsang National University, Tongyeong 650-160, Korea

Experimental fishing operation by the shrimp beam trawl was carried out to investigate the bycatch in order to develop the selective fishing gear of the shrimp beam trawl fishery. The experimental trawling was performed by the prototype fishing gear in coast sea of Boryeong, Buan, Kangjin, Tongyeong and Geoje from 30 April to 13 November 2005. Bycatches of the experimental trawling were analyzed species composition, total length composition. The results obtained can be summarized as follows; Target fishes caught by the shrimp beam trawl were Palaemon gravieri, Crangon Hakodatei, Trachysalambria curvirostris, Parapenaeopsis tenellus, Rhynchocinetes uritai and Matapenaeus joyneri. And their fishing rate and total length range were 50.0%, 46.0%, 2.6%, 0.4%, 0.3%, 0.3% and 40-80mm, 40-80mm, 120-150mm, 60-80mm, 60-80mm, 60-120mm respectively. Bycatches caught by the shrimp beam trawl consisted of fishes of 30 kinds, 6 kinds of mollusk, 5 kinds of shellfishes and 3 kinds of crabs. The main fish was Engraulis japonicus, Platycephalus indicus, Paralichthys olivaceus, Leiognathus nuchalis and Conger myriaster, their occupied rate were 47.0%, 16.6%, 13.6%, 5.5%, 2.7% respectively, and their total length range were 60-150mm, 80-410mm, 80-600mm, 30- 80mm and 150-460mm respectively. A number bycatch rates of shrimp beam trawl fishery were 99.7% in Buan, 60.0% in Kangjin, 14.6% in Boryeong, 10.6% in Tongyeong and 2.7% in Geoje, The weight bycatch rate were 99.9% in Buan, 75.1% in Kangjin, 57.1% in Tongyeong, 47.4% in Boryeong and 15.4% in Geoje.

Key words : Shrimp beam trawl, Bycatch rate, Bycatches

* Corresponding author: [email protected], Tel:82-55-640-3091, Fax:82-55-648-0170

,

8 ,

5 .

5 1 9 31

26mm

, 9 1

6 30 , 10 1 4

30 16mm

, .

(bycatch) (target fish)

,

(discard) , FAO(Alverson et

al, 1994) 25%

.

(RIO, 1997)

( ) , Oh

et al.(2003a, 2003b, 2004, 2005)

, ,

, Cha et al.(1999)

, Huh and An(1997, 1999)

,

.

Saila(1983), Pender and Willing (1989), Andrew and Pepperell(1992), Kennelly

(1995) , Eayrs et al.

(1997)

, Day and Eayrs(2001)

, Fonseca et al.(2005)

,

.

, , ,

, ,

.

Fig. 1 ( )

( )

, 4

,

. Fig. 1(a)

11m, 18mm, PP φ20mm

34.8m, PP

φ80mm .

( φ105mm) 17

8.3 ,

(800g) 64

51.2 .

Fig. 1(b)

8m, 16mm, PP φ15mm

18.4m, PP

φ70mm

. ( φ120mm) 8

5.6kg ,

(500g) 18

9.0kg .

Table 1 6.93 7.93 ,

320 350 , 5

,

2.98 3.43 , 128 133

,

4.97 4.99 , 260 294

.

2005 4 30 11 13

, , , (Fig. 2)

Table 1 .

,

, ,

.

,

4 5

, 5

.

1.2 1.4knots ,

, 1 , ,

30 ,

2 .

,

. 10

.

( / )

Fig. 1. Drawings of the experimental shrimp beam trawl net.

lron Pipe φ75mm 11m

PVC 120 8PCS HR PP φ 15 8.5m PVCφ 105 3PCS PP φ20 1.6m

PP φ 15 1.4m 15 22mm

12 18 12 18

140 50

13.2m

13.7m

6m

6m 2m

2.4m

250

260 18 22 18 22

12 18 325

20 12 18

325

12 20 390

45 50

90 80 120 250 200250 1,400

1,000 2418

916

100200200

120 200

SBRφ 78 1.8m 6PCS

SBRφ 106 2m PVCφ 105 7PCS HR PP φ20 16.6m

GR SBRφ78 16.6m 29PCS(800g)

GR SBRφ72 9m Sinker 500g 18PCS

lron Pipe φ65mm 8m Table 1. Specification of the experimental shrimp beam trawlers

G/T Engine Frequency Area Ship s Name power of fishing

(ton)

(HP) operation

Geoje Gwangmyeong 4.97 294 3

Mankang 4.99 270 3

Musung 4.97 260 3

Oksung 4.99 281 3

Tongyeong Jongsung 3.43 128 3

Kangjin Jisu 2.98 133 6

Buan Dongjin 7.93 350 2

Boryeong Bosung 6.93 320 7

(a) Western coast type

(b) Southern coast type

( /

) .

( ,

N) , A(m

) ,

B( , m),

υ(m/sec) h(sec)

. A B υ h

d d = N/A ( /m

)

.

,

, , .

, , ,

2 12

Table 2 Fig. 3 .

5 30

10 , 359,890

, (Palaemon

gravieri) 50.0%

, (Crangon

Fig. 2. Experimental fishing ground of the shrimp beam trawl( : fishing ground).

36 30 00 N

Boryeong

Kangjin Tongyeong & Geoje

Buan

36 10 00 N

34 20 00N

34 4000 N 35 00 00N

35 30 00 N

126 10 10 E 126 20 00 E

126 00 00 E

126 30 00 E 126 50 00 E 128 20 00 E

34 40 00 E

128 40 00 E 35 50 00 N

Hakodatei) 46.0% , (Trachysalambria curvirostris)

2.6%, (Parapenaeopsis tenellus) 0.4%, (Rhynchocinetes uritai) 0.3%, (Matapenaeus joyneri) 0.3% ,

0.4% (Solenocera melantho),

(Fenneropenaeus chinensis),

(Alpheus digitalis), (Marsupenaeus

japonicus) .

4

41,204 ,

41,110 99.8%

, 90 ,

3 , 1

, 3

. 4

1,132 , 95.4%

Table 2. Species composition of shrimp caught by the shrimp beam trawl Area

Boryeong

Buan

Kangjin

Tongyeong

Geoje

Scientific name Crangon Hakodatei Parapenaeopsis tenellus Alpheus digitalis Matapenaeus joyneri

Fenneropenaeus chinensis

Crangon Hakodatei Fenneropenaeus chinensis Marsupenaeus japonicus Matapenaeus joyneri

Crangon Hakodatei Matapenaeus joyneri Parapenaeopsis tenellus Rhynchocinetes uritai

Crangon Hakodatei Solenocera melantho Palaemon gravieri

Trachysalambria curvirostris Subtotal

Subtotal

Subtotal

Subtotal Total

Subtotal

Range of individual Catch

Total length(mm) Weight(g) Number of catch Total catch(g) 40 70

50 80 100 110 100

2 4 2 3 12 11

41,110 90 3 1

147,505 120 36 11

- - 41,204 147,672

- - 3 75

- - 1,132 12,353

- - 8,053 26,500

- - 309,498 887,588

- - 359,890 1,074,188

210 25 3 75

40 80 200 250 250 260 60 120

2 6 27 30 9 12

44 4 3 1,081

264 108 90 11,891

40 70 65 110 50 80 60 80

3 4 9 11 2 3 2 5

5,000 155 1,610 1,288

16,500 1,700 4,800 3,500

40 70 150 200 40 80 120 150

3 4 36 40 2 3 10 15

119,627 178 180,199 9,494

305,588 13,500 484,000 84,500

Fig. 3. Species composition of shrimp in relation to the fishing ground.

100 80 60 40 20

0 Boryeong Buan Kangjin tongyeong Geoje

Rate(%)

Palaemon gravieri Crangon hakodatei

Parapenaeopsis tenellus Matapenaeus joyneri

Other

,

, , ,

4 8,053

, 62.3%

, 19.9%,

16.0%, 1.2% ,

4 309,498

, 58.2%

, 38.7%

, ,

.

40 260mm ,

250 260mm ,

200 250mm,

150 200mm, 120 150mm,

100 110mm, 60 120mm,

60 80mm, 50 80mm,

40 80mm .

, , ,

2 12

10 ,

, , 4 ,

1 Oh

et al.(2003a, 2003b)

37 , Cha et al.(1999)

14

.

4 , 5 , 10 11 4

, Oh et al.(2003a, 2003b) Cha et al.(1999)

.

, Oh et al.(2003a, 2003b) Cha et

al.(1999) .

, , ,

2 12

Table 3 .

5 30

44 ,

30 , 6 , 5 ,

3 .

16,129

(Engraulis japonicus) 47.0%, (Platycephalus indicus) 16.6%, (Paralichthys olivaceus) 13.6%, (Leiognathus nuchalis) 5.5%, (Conger

myriaster) 2.7% , 2%

(Cynoglossus robustus), (Pennahia argentata), (Raja kenojei), (Acanthogobius hasta), (Pleuronectes herzensteini), (Hemitripterus villosus),

(Sebastes hubbsi), (Lophiomus setigerus), (Hexagrammos agrammus),

(Pholis nebulosa), (Konosirus punctatus), (Liparis tessellatus), (Acanthogobius flavimanus), (Kaiwarinus equula), (Muraenesox cinereus), (Pagrus major),

(Nibea albiflora), (Clupanodon punctatus), (Takifugu Pardalis), (Sebastiscus marmoratus), (Lateolabrax japonicus),

(Many-banbed sole), (Chelidonichthys spinosus), (Zeus japonicus),

(Inimicus japonnicus), (Navodon modestus) .

30

,

, , , , , ,

, , , , 12

, , ,

, , , , 7 ,

, , , ,

, , 7 ,

, , 3 ,

1 .

5 30

1,557

(Watasenia scintillans) 92.2%

, (Octopus ocellatus)

5.1% , 3%

(Octopus minor), (Sepia esculenta), (Octopus dofleini), (Todarodes

pacificus) .

5 30

245 (Rapana

venosa) 41.2%

, (Neptunea Polycostata), (Atrina pinnata), (Scapharca broughtonii),

(Solen Strictus) .

5 30

510

(Charybdis bimaculata) 52.4%

, (Oratosquilla

oratoria), (Portunus trituberculatus) .

Table 3 Table 3. Species composition of bycatch caught by the shrimp beam trawl

Area Species

Fishes

Others Boryeong

Scientific name

Platycephalus indicus Paralichthys olivaceus Cynoglossus robustus Pennahia argentata Raja kenojei Acanthogobius hasta Pleuronectes herzensteini Hemitripterus villosus Sebastes hubbsi Lophiomus setigerus Hexagrammos agrammus Konosirus punctatus Pagrus major Pholis nebulosa

Atrina pinnata Scapharca broughtonii Solen Strictus Rapana venosa Neptunea Polycostata Octopus ocellatus Watasenia scintillans Sepia esculenta Oratosquilla oratoria Charybdis bimaculata

Range of individual Catch Total length

(mm)

Weight (g)

Number of catch

Total catch (g) 80 250

80 600 180 190 90 140 160 450 180 200 330 350 290 300 370 440 60 200 150 160 200 160 170

3 64 4 1,500 24 45 5 35 35 500 9 15 210 300 120 450 2,000 700 3 30 20 25 900 15 20

2,624 2,180 278 185 22 47 65 8 1 1 221 3 1 4

23,188 27,332 8,597 2,270 3,510 500 17,130 2,255 2,000 700 5,379 70 900 70

260 270 200 220 60 70 140 150 40 50 180 190 70 160 270 110 120 30 40

160 200 110 150 70 100 50 60 20 40 80 110 9 23 450 15 40 2 10

57 17 6 89 34 56 802 1 108 232

10,332 2,380 540 4,895 850 5,040 11,708 450 1,836 1,236 5,640 93,901

1,402 39,267 7,042 133,168 Subtotal

Subtotal

Total

Table 3. Continued

Area Species

Fishes

Fishes

Others Others Buan

Kangjin

Scientific name

Engraulis japonicus Platycephalus indicus Lophiomus setigerus Cynoglossus robustus Paralichthys olivaceus Hexagrammos agrammus Raja kenojei

Pennahia argentata Liparis tessellatus Sebastes hubbsi

Acanthogobius flavimanus Liparis tessellatus Kaiwarinus equula Cynoglossus robustus Paralichthys olivaceus Muraenesox cinereus Lophiomus setigerus Pholis nebulosa Platycephalus indicus Pagrus major Nibea albiflora Clupanodon punctatus Takifugu Pardalis Pleuronectes herzensteini Leiognathus nuchalis

Octopus minor Watasenia scintillans Sepia esculenta Octopus ocellatus Rapana venosa Charybdis bimaculata Octopus minor Neptunea Polycostata Portunus trituberculatus Oratosquilla oratoria

Range of individual Catch Total length

(mm)

Weight (g)

Number of catch

Total catch (g) 80 150

300 400 280 450 180 200 650 730 150 200 700 200 210 350 450

9 13 305 415 590 760 30 43 2,800 5,200 38 62 2,140 140 160 700 800

630 45 38 13 11 10 1 4 2 1

6,773 15,950 25,000 466 45,000 516 2,140 500 1,400 800

90 250 100 190 60 90 110 200 300 400 100 510 280 370 100 140 130 430 250 100 150 110 210 70 100 190 30 80

9 62 220 280 10 70 135 188 440 750 185 305 360 820 17 28 85 500 250 17 33 35 55 28 32 220 1 4

354 7 71 36 4 11 2 17 11 1 74 2 2 1 886

9,310 1,740 3,499 5,950 2,100 2,610 1,180 380 1,920 250 1,705 90 60 220 1,340

200 800 80 110 260 150 210 150 200 50 60

15 65 9 13 400 75 105 65 105 85 95

22 78 1 19 12 3

780 906 400 1,660 960 270 130 200

30 70 230 240 80 180

23 29 17 33 35 45 8 16

6 30 3 50

155 800 120 555

89 1,630

755 98,545

1,492 32,380

136 4,976

1,628 37,551 844 100,175 Subtotal

Subtotal

Subtotal Total Subtotal

Total

24 7,042

, 14 5,640

, 3 859 , 5

203 , 2 340 ,

37.3%, 31.0%,

11.4% .

Table 3. Continued

Area Species

Fishes

Fishes Others

Others Tong

yeong

Geoje

Scientific name

Liparis tessellatus Sebastiscus marmoratus Conger myriaster Cynoglossus robustus Pholis nebulosa Lateolabrax japonicus Pleuronectes herzensteini Lophiomus setigerus Acanthogobius flavimanus

Octopus dofleini Octopus ocellatus Charybdis bimaculata Octopus minor Watasenia scintillans

Engraulis japonicus Many-banbed sole Liparis tessellatus Navodon modestus Nibea albiflora Sebastiscus marmoratus Conger myriaster Pholis nebulosa Pagrus major

Pleuronectes herzensteini Lophiomus setigerus Chelidonichthys spinosus Zeus japonicus Inimicus japonnicus

Todarodes pacificus Charybdis bimaculata Octopus minor Portunus trituberculatus Watasenia scintillans

Range of individual Catch Total length

(mm)

Weight (g)

Number of catch

Total catch (g) 420 430

80 90 180 270 140 150 190 230 60 70 190 200 260 270 150 160

997 1,125 13 15 120 150 40 50 32 35 7 9 250 275 255 355 35 38

18 350 30 12 7 15 5 12 36

17,820 4,900 3,600 564 224 120 750 3,036 1,296

480 170 180 70 80 250 70 100

670 12 13 8 9 26 28 4 7

1 4 17 7 438

670 50 136 196 1,920

60 90 260 270 420 650 130 230 240 80 90 150 450 190 250 110 120 190 200 260 270 370 380 320 330 140 150

3 5 230 250 997 1,956 260 380 410 13 15 50 350 32 53 73 79 250 275 255 355 470 495 395 455 185 210

6,994 82 24 1 52 10 423 135 20 8 33 5 3 30

27,868 20,100 30,130 260 20,800 140 84,255 6,100 1,154 2,630 10,890 2,375 1,260 5,700

250 70 80 170 250 90 120 90 100

280 8 9 26 39 10 13 6 7

1 15 4 82 117

280 114 117 907 871

485 32,334

467 2,972

952 61,806

7,820 159,845

219 2,289

8,039 162,134 Subtotal

Subtotal Total

Subtotal

Subtotal

Subtotal

14 844 ,

10 755 , 1

6 , 1 30 , 2

53 ,

74.6%, 5.9%, 5.3%

. 21 1,628

, 15 1,492

, 4 132 , 1 3

, 54.4%,

21.7%, 4.8%

. 14 952

, 9 485

, 4 450 , 1 17

,

46.0%, 36.8%, 3.2%

. 19 8,039

, 14 7,820

, 3 146 , 2 97

, 87.0%,

5.3%, 1.7% .

5 30

30 700mm

, 160 700mm

, , , , ,

, , , , , ,

, , , , ,

, , , , , ,

, , , , , ,

, .

, 130 800mm

, , ,

, , .

, 260 270mm

, , ,

, .

, 80 180mm

, ,

.

44

30 , 6 , 5 ,

3 ,

24 , 21

, 19 ,

14 ,

2 3

, Oh et al.(2003)

139 , Cha et al.(1997) 54

.

4 , Oh et al.(2003a, 2003b)

Cha et al.(1999)

.

5 30

( / ) 37.5% ,

Fig. 4 2.7%

, 10.6% ,

14.6% ,

60.0% ,

99.7% .

5 30

(

/ ) 59.0%

, Fig. 4 15.4%

,

47.4% , 57.1%

, 75.1% ,

99.9% .

37.5%, 59.0% , 99.7%, 99.9%

2.7%, 15.4%

.

,

.

, , ,

2 12

Table 5 .

30

1,400,258 , 359,890

0.25 / ,

0.65 / ,

0.08 / ,

0.03 / ,

0.01, 0.0001 / .

378,913

0.27 / ,

0.66 /

, 0.09 / ,

0.04 / ,

0.03, 0.02

/ .

.

, , ,

,

.

10 ,

, , , ,

, 50.0%, 46.0%,

2.6%, 0.4%, 0.3%, 0.3% ,

40 80mm, 40 80mm, 120 150mm, 60

80mm, 60 80mm, 60 120mm .

Fig. 4. Bycatch rate in relation to the fishing ground.

Table 4. Resource density in relation to fishing ground 100

80 60 40 20

0 Number Weight

Rate(%)

Boryeong Buan Kangjin

Tongyeong Geoje

Area Boryeong Buan Kangjin Tongyeong Geoje

Total

Sweeping area(m

),

(a) 521,532

48,884 113,346 238,832 477,664 1,400,258

Number of catch, (b) Density, (b/a) Shrimp Total Shrimp Total

41,204 3 1,132 8,053 309,498

48,246 847 2,760 9,005 317,537

0.08 0.0001 0.01 0.03 0.65

0.09

0.02

0.03

0.04

0.66

359,890 378,395 0.25 0.27

30 , 14

, 14 , 10

, 15 , 6

, 14 , 5 ,

10 , 4 , 9

, 5 , , , ,

,

47.0%, 16.6%, 13.6%, 5.5% 2.7% .

2.7 99.7%( 37.5%) ,

99.7% ,

60.0% ,

14.6% , 10.6%

, 2.7% ,

59.0% , .

0.0001 0.66 /m

( =0.25) ,

0.66 /m

,

0.09 /m

, 0.04/m

,

0.01, 0.0001 /m

.

Alverson, D.L., M.H. Freebeg, J.G. Pope and S.A.

Murawski, 1994. A global assessment of fisheries bycatch and discards. FAO Fish. Tech. Paper, vol.

329, pp. 233.

Andrew, N.L. and J.G. Pepperell, 1992. The by-catch of shrimp fisheries. Ann. Rev. Oceanogr. Mar. Biol., 30, 527 565.

Cha, B.Y., B.Q. Hong, H.S. Jo and H.S. Sohn, 1999.

Species Composition of shrimp collected by Shrimp Trawal in the Coastal Water of Sacheon. bull. Nat l.

fish. Res. Dev. Inst. Korea, 56, 45 53.

Day, G. and S. Eayars, 2001. NPF operators make gains in bycatch reduction but problems remain!

Professional Fisherman, vol. 23. No.4. February,

18 19.

Eayrs, S., N. Rawlinson and D. Brewer, 1997. Reducing bycatch in Australia s Northern Prawn Fishery.

Asia-Pacific Fishing 97. Conference papers. Baird Publications, pp. 97 105.

Fonseca, P., A. Campos, R.B. Larsen, T.C. Borges and K.

Erzini, 2005. Using a modified Nordm φ re grid for by-catch reduction in the Portuguese crustacean- trawl fishery. Fisheries Research, 71(2), 223 239.

Kennelly, S.J., 1995. The issue of bycatch in Australias demersal trawl fisheries. Rev. Fish Biol., 5, 213 234.

Huh, S.H. and Y.R. An, 1997. Seasonal variation of shrimp(Crustacea: Decapoda) community in the Eelgrass(Zostera maria) bed in Kwangyang bay, Korea. J. Kor. Fish. Soc., 30(4), 532 542.

Huh, S.H. and Y.R. An, 1999. Species composition and seasonal variation of shrimp assemblage in the coastal waters of Kori, Korea. J. Kor. Fish. Soc., 32(6), 232 237.

Oh, T.Y., J.I. Kim, J.L. Koh, H.K. Cha and J.H. Lee, 2003a. Species composition and seasonal variations of the shrimp beam trawl fisheries in the adjacent waters Geomundo, Korea. Bull. Kor. Fish. Tech.

Soc., 39(1), 63 76.

Oh, T.Y., J.H. Choi, H.K. Cha, J.I. Kim, J.L. Koh and J.H. Lee, 2003b. Maturation and growth of Trachysalambria curvirostris in the coastal water of Geomundo, Korea. Bull. Kor. Fish. Tech. Soc., 39(2), 120 127.

Oh, T.Y., H.K. Cha and J.H. Choi, 2004. Population dynamis of smoothshell shrimp, parapenaeopsis tenella from the coastal area of Geomun-do, Korea.

Bull. Kor. Fish. Tech. Soc., 40(1), 86 94.

Oh, T.Y., J.H. Choi, H.K. Cha, J.I. Kim, D.H. Kim and J.H. Lee, 2005. Growth and reproduction of deep- water mud shrimp(solenocera melantho)around Geomun Island, Korea. J. Kor. Fish. Soc., 38(4), 232 238.

Pender, P.J. and R.S. Willing, 1989. Trash or treasure

Aust. Fish., 48, 35 36.

Research Institute of Oceanography(RIO), 1997. A research on propriety of the shrimp beam trawl fishery in Namhae coastal sea. Seoul National University, pp. 1 137.

Saila, S.B., 1983. Importance and assessment of discards in commercial fisheries. FAO Fish. Circ., vol. 765, pp. 62.

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2009 2 10 1

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