Observer Observation report

On the KM. Mutiara 5

Prepared by :

Akhmad Yusuf Affandi

LOKA PENELITIAN PERIKANAN TUNA

TA. 2015

Purpose of observation:

1. To collect the data and information on various aspects of longline tuna operating in

Indian Ocean.

2. To collect information and data on biology (e.g. length).

Observation date:

Data was collected during the observation onboard KM Mutiara 5 during the period of

31 August until 20 October 2015. Data collected consisted of fishing grounds setting

and hauling and catch composition. Length of each catch was measurfed.

Result:

The name of the boat where observation took place is KM Mutiara 5, with the port

based in Benoa Harbour, Denpasar (Longitude 115012’30” East and Latitude 08044’22”

South Fig.1).

Figure 1. Benoa Harbour Bali (Source: Google)

Spesification of boat

KM. Mutiara 5 is GT. 29 No. 1660/Pd 2008 built in 2008, with main materials

made of wood and covered by fiberglass. The dimention of the boat LxWxD (m) = 22 x

4,5 x 2. Main engine is Mitshubishi 6D22 with 300 PK, and two other Mitshubishi

engines for generator 4 cylinders 60 PK, and cooler carrier 30 PK. Boat speed during

setting is between 4,5 – 5,5 knot, and during navigation is 5 – 6 knot. Capacity of

holding the catch is 20 tonnes. Frozen on board to -200 C. Number of crew is 13, boat

captain also the fishing master. Navigation is supported with magnetic compass, Global

Positioning System (GPS) Furuno GP-32, and Radio Direction Finder (RDF) Taiyo

TDA-157 and comuniction radio Single Side Band Radio (SSB) Icom IC-718, and auto

steering gear. Safety gear consist of life jacket 15 pieces, two ring buoy, and fire

extinguisher.

Figure 2. Longline boat of KM. Mutiara 5

Spesifikasi of gear

Longline of KM. Mutiara 5 is blong system, which used by longline from

Taiwan. KM Mutiara 5 based in Benoa harbour Bali

KM Mutiara 5 has 26 blong, with details specification in table 1 (Fig. 3). The

hook is J-hook No. 5, made of stainless steel 6 cm. The baits are lemuru (Sardinella

lemuru), live milkfish (Chanos chanos forskal) size 14 – 16 cm, ikan layang

(Decapterus spp.) and squid (Loligo spp.). the used of baits depending on the condition

of moon (full or new moon).

Table 1. Longline specifikation KM. Mutiara 5

Notes Specification

Materials and diameter of main line monofilamen, Ø 3,8 mm

Metarial, length and diameter branch line monofilamen, 25 m dan Ø 1,8 mm

Distance between branch line 50 m

No of buoys per blong 4 – 8 pieces

No of blong 26 blong

No of hook in 1 blong 56 – 60 pieces

No of hook between buoy 7 – 15 hooks

Total hooks 1.456

Length of buoy line 25 m

Length of branch line 22 m

Distance between branch line 50 m

No of hook 5

Bait lemuru, layang, live milkfish, and squids

Figure 3. Longline of KM. Mutiara 5

Fishing grounds

The 33 setting during the observation were conducted in the Indian Ocean south

of Bali to Nusa Tenggara 10046 – 15036 LS dan 115007 – 119030 BT (Fig. 4).

Figure 4. Fishing ground KM. Mutiara 5 during observation

Table 2. Setting coordinates of KM. Mutiara 5 during observation

No. Setting South East

1 120 04,889 1150 09,020

2 120 11,615 1150 21,236

3 120 01,159 1160 56,662

4 100 48,482 1170 27,078

5 110 55,669 1180 10,602

6 120 02,850 1180 06,476

7 110 19,280 1180 40,615

8 100 28,915 1190 16,647

9 100 23,100 1190 06,215

10 100 55,010 1190 34,246

11 110 06,392 1190 43,089

12 110 16,183 1190 46,613

13 110 16,068 1190 53,779

14 120 43,551 1170 05,746

15 120 44,415 1160 46,070

16 120 47,752 1160 46,770

17 120 34,276 1160 36,939

18 120 35,518 1160 44,840

19 120 36,413 1160 55,194

20 130 01,882 1160 38,902

21 130 14,105 1160 04,297

22 140 07,840 1150 56,450

23 140 02,810 1150 56,400

24 130 27,050 1170 01,352

25 130 29,192 1170 17,225

26 130 30,054 1170 21,136

27 120 33,512 1180 56,754

28 120 36,189 1190 35,698

29 120 19,203 1190 37,317

30 120 07,421 1190 35,271

31 110 33,818 1190 31,875

32 120 15,664 1180 02,734

33 120 21,228 1170 49,004

Catch composition

Catch composition of KM. Mutiara 5 during 33 settings consisted of 24 spesies.

These are main target species : BET (Thunnus obesus), YFT madidihang, albacore

(Thunnus alalunga) dan SBT (Thunnus maccoyii), and other species including

swordfish (Xiphias gladius), setuhuk hitam (Makaira indica), setuhuk loreng

(Tetrapturus audax), ikan layaran (Istiophorus platypterus), ikan gindara

(Lepidocybium spp.), setuhuk biru (Makaira mazara), ikan opah (Lampris guttatus),

cakalang (Katsuwonus pelamis), bawal lonjong (Taractes rubescens), bawal sabit

(Taractichthys steindachneri), tenggiri (Acanthocybium solandri), ikan naga

(Alepisaurus ferrox), pari lemer (Pteroplatytrygon violacea), layur hitam (Gempylus

serpens), alu-alu atau baracuda (Sphyraena barracuda), hiu selendang biru (Prionace

glauca), hiu lanjaman (Carcharhinus brevipinna), hiu botol (Pseudocarcharias

kamoharai), hiu mako (Isurus oxyrinchus) dan ikan mola (Famili Molidae). Total catch

is 602 individuals.

Dominat main target catch is BET 29 fish (4,8%), followed by YFT 26 fish

(4,3%), albacore 22 fish (3,7%), and SBT 11 fish (1,8%). Other catch consisted of

species with economic value, and non economic value. The most catch is gindara 61

fish (10,2%), followed by shark (hiu botol) 40 fish (6,7%). Hiu botol bernilai ekonomis

karena diambil minyaknya yang berasal dari hatinya. Species with no economic value is

ikan naga 195 fish (32,5%), followed by ikan pari 122 fish (22%) (Fig. 5).

Figure 5. Catch composition KM. Mutiara 5 during observation

Hook Rate

The highest hook rate is for ikan naga 0,454. While the highest hook rate for

main target is BET 0,068, followed by YFT madidihang 0,061, albacore 0,051 and SBT

0,026 (Table 3).

32.5

22

10.2

6.7

4.8

4.3

3.7

3

2.3

2.2

2.2

1.8

1.2

0.8

0.7

0.3

0.3

0.3

0.2

0.2

0.2

0.2

0.2

0.2

0 5 10 15 20 25 30 35

Naga

Pari

Gindara

Hiu botol

Tuna Mata Besar

Madidihang

Albakora

Ikan Meka

Tengiri

Setuhuk Biru

Ikan opah

Tuna Sirip Biru Selatan

Bawal Sabit

Cakalang

Setuhuk Hitam

Hiu Selendang Biru

Setuhuk Loreng

Hiu LanjamanHiu Mako

Bawal Panjang

Mola mola

Layaran

Layur Hitam

Barakuda

(%)

Sp

esie

s

Tabel 3. hook rate KM. Mutiara 5

No Spesies No of hooks

No of fish

Value of Hook

Rate

1 Naga 42.905 195 0,454

2 Pari 42.905 132 0,308

3 Gindara 42.905 61 0,142

4 Hiu botol 42.905 40 0,093

5 Tuna mata besar 42.905 29 0,068

6 Madidihang 42.905 26 0,061

7 Albakora 42.905 22 0,051

8 Ikan pedang 42.905 18 0,042

9 Tenggiri 42.905 14 0,033

10 Setuhuk biru 42.905 13 0,030

11 Ikan opah 42.905 13 0,030

12 Tuna sirip biru selatan 42.905 11 0,026

13 Bawal sabit 42.905 7 0,016

14 Cakalang 42.905 5 0,012

15 Setuhuk hitam 42.905 4 0,009

16 Hiu selendang biru 42.905 2 0,005

17 Hiu lanjaman 42.905 2 0,005

18 Setuhuk loreng 42.095 2 0,005

19 Hiu mako 42.905 1 0,002

20 Bawal lonjong 42.905 1 0,002

21 Ikan mola 42.905 1 0,002

22 Layaran 42.905 1 0,002

23 Layur hitam 42.905 1 0,002

24 Barakuda 42.905 1 0,002

Biological Aspects

Length

Length measurement was conducted for 22 albacore, 29 BET and 26 YFT. The results

of the length distribution for albacore was 88 – 112 cmFL, with the average leangth was

94,07 cmFL, and modus at range of 86 – 90 cmFL (Fig. 6), BET has length distribution

between 85 – 174 cmFL, average 139,06 cmFL, and modus at 146 – 150 cmFL (Fig.7),

while YFT madidihang was 120 – 165 cmFL, average length 144,3 cmFL, and modus

length at 85 – 87 cmFL (Fig. 8).

Figure 6. Length distribution of albacore from KM. Mutiara 5

Figure 7. Length distribution of BET KM. Mutiara 5

Figure 8. Length distribution of YFT madidihang KM. Mutiara 5

0

2

4

6

8

10

12

86-90 91-95 96-100 101-105 106-110 111-115

Nu

mb

er o

f a

lba

core

Lenght (cmFL)

0

1

2

3

4

5

6

7

Nu

mb

er o

f B

ET

Lenght (cmFL)

0

1

2

3

4

5

6

Nu

mb

er o

f Y

FT

Lenght (cmFL)

Length and weight relation

Appendix 1. Hook rate per spesies per setting

No.

Setting

No. of

hook

BET YFT Madidihang SBT Albacore

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

value

Hook

Rate

1 1.012 - - 2 0,198 - - 11 1,087

2 1.100 - - - - - - - -

3 1.100 3 0,273 - - - - 1 0,091

4 1.100 - - - - - - - -

5 1.100 - - - - - - - -

6 969 2 0,206 - - - - 2 0,206

7 968 - - - - - - - -

8 1.056 1 0,095 1 0,095 - - - -

9 1.100 - - - - - - - -

10 1.100 - - - - - - - -

11 1.400 - - 5 0,357 - - - -

12 1.456 1 0,069 3 0,206 - - - -

13 1.400 2 0,143 3 0,214 - - - -

14 1.400 - - - - 2 0,143 - -

15 1.400 3 0,214 - - 1 0,071 - -

16 1.400 1 0,071 - - - - - -

17 1.400 4 0,286 1 0,071 2 0,143 2 0,143

18 1.400 6 0,429 3 0,214 - - - -

19 1.400 - - - - 1 0,071 - -

20 1.400 - - 1 0,071 1 0,071 1 0,071

21 1.400 - - 1 0,071 - - - -

22 1.400 - - - - - - - -

23 1.400 - - - - - - 1 0,071

24 1.400 3 0,214 1 0,071 - - - -

25 1.400 1 0,071 3 0,214 - - 1 0,071

26 1.400 - - 1 0,071 - - 1 0,071

27 1.400 - - - - - - - -

28 1.400 - - - - 2 0,143 - -

29 1.440 - - 1 0,069 1 0,069 1 0,069

30 1.440 - - - - - - - -

31 1.380 - - - - 1 0,072 1 0,072

32 1.440 2 0,139 - - - - - -

33 1.344 - - - - - - - -

Total 42.905 29 0,068 26 0,061 11 0,026 22 0,051

Appendix 1. Continued

No.

Setting

No. of

hook

Gindara Pari Tenggiri Hiu Botol

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

value

Hook

Rate

1 1.012 3 0,296 1 0,099 3 0,296 0 -

2 1.100 2 0,182 2 0,182 - - 2 0,182

3 1.100 5 0,455 2 0,182 - - 0 -

4 1.100 0 0,000 4 0,364 1 0,091 1 0,091

5 1.100 1 0,091 2 0,182 - - 0 -

6 969 - - 2 0,206 - - 0 -

7 968 - - 2 0,207 - - 0 -

8 1.056 1 0,095 5 0,473 - - 2 0,189

9 1.100 1 0,091 5 0,455 - - 1 0,091

10 1.100 6 0,545 4 0,364 - - 2 0,182

11 1.400 - - 9 0,643 3 0,214 0 -

12 1.456 - - 9 0,618 - - 1 0,069

13 1.400 1 0,071 12 0,857 - - 1 0,071

14 1.400 - - 10 0,714 - - 6 0,429

15 1.400 3 0,214 7 0,500 - - 2 0,143

16 1.400 - - 8 0,571 1 0,071 1 0,071

17 1.400 3 0,214 5 0,357 - - 2 0,143

18 1.400 3 0,214 3 0,214 - - 1 0,071

19 1.400 2 0,143 7 0,500 - - 1 0,071

20 1.400 7 0,500 4 0,286 - - 1 0,071

21 1.400 2 0,143 3 0,214 - - 1 0,071

22 1.400 7 0,500 - - - - 1 0,071

23 1.400 3 0,214 2 0,143 - - 2 0,143

24 1.400 2 0,143 3 0,214 - - 1 0,071

25 1.400 2 0,143 2 0,143 1 0,071 0 -

26 1.400 1 0,071 2 0,143 2 0,143 2 0,143

27 1.400 - - 4 0,286 - - 2 0,143

28 1.400 - - 2 0,143 1 0,071 3 0,214

29 1.440 - - 2 0,139 1 0,069 2 0,139

30 1.440 2 0,139 2 0,139 - - 1 0,069

31 1.380 1 0,072 2 0,145 1 0,072 - -

32 1.440 1 0,069 2 0,139 - - - -

33 1.344 2 0,149 3 0,223 - - 1 0,074

Total 42.905 61 0,142 132 0,308 14 0,033 40 0,093

Lampiran 1. Lanjutan

No.

Setting

No. of

hooks

Cakalang Setuhuk Hitam Setuhuk Biru Hiu Selendang

Biru

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

value

Hook

Rate

1 1.012 - - - - - - - -

2 1.100 1 0,091 - - - - - -

3 1.100 - - 1 0,091 1 0,091 1 0,091

4 1.100 - - - - - - - -

5 1.100 - - 1 0,091 1 0,091 - -

6 969 - - - - - - - -

7 968 - - - - - - - -

8 1.056 - - - - - - - -

9 1.100 - - - - - - 1 0,091

10 1.100 - - - - - - - -

11 1.400 - - - - - - - -

12 1.456 - - - - - - - -

13 1.400 - - - - - - - -

14 1.400 2 0,143 - - - - - -

15 1.400 - - - - - - - -

16 1.400 - - - - - - - -

17 1.400 - - - - - - - -

18 1.400 - - - - - - - -

19 1.400 - - - - - - - -

20 1.400 - - - - 1 0,071 - -

21 1.400 - - - - - - - -

22 1.400 - - - - 1 0,071 - -

23 1.400 1 0,071 1 0,071 - - - -

24 1.400 1 0,071 1 0,071 - - - -

25 1.400 - - - - - - - -

26 1.400 - - - - - - - -

27 1.400 - - - - 2 0,143 - -

28 1.400 - - - - 5 0,357 - -

29 1.440 - - - - - - - -

30 1.440 - - - - 1 0,069 - -

31 1.380 - - - - - - - -

32 1.440 - - - - - - - -

33 1.344 - - 0 - 1 0,074 - -

Total 42.905 5 0,012 4 0,009 13 0,030 2 0,005

Appendix 1. Continued

No.Setting No. of

hooks

Bawal Sabit Ikan Opah Hiu Mako Ikan Pedang

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

value

Hook

Rate

1 1.012 - - - - - - - -

2 1.100 - - - - - - - -

3 1.100 - - - - - - - -

4 1.100 - - - - - - - -

5 1.100 1 0,091 - - - - - -

6 969 - - - - - - - -

7 968 1 0,103 - - - - - -

8 1.056 - - 4 0,379 - - - -

9 1.100 - - 3 0,273 - - - -

10 1.100 - - 3 0,273 1 0,091 2 0,182

11 1.400 - - 2 0,143 - - - -

12 1.456 - - 1 0,069 - - - -

13 1.400 - - - - - - - -

14 1.400 - - - - - - 1 0,071

15 1.400 2 0,143 - - - - 2 0,143

16 1.400 - - - - - - 1 0,071

17 1.400 - - - - - - 2 0,143

18 1.400 2 0,143 - - - - 2 0,143

19 1.400 - - - - - - 4 0,286

20 1.400 - - - - - - 2 0,143

21 1.400 - - - - - - - -

22 1.400 - - - - - - - -

23 1.400 - - - - - - - -

24 1.400 - - - - - - - -

25 1.400 - - - - - - - -

26 1.400 - - - - - - - -

27 1.400 - - - - - - - -

28 1.400 - - - - - - - -

29 1.440 - - - - - - - -

30 1.440 - - - - - - 1 0,069

31 1.380 - - - - - - - -

32 1.440 - - - - - - 1 0,069

33 1.344 1 0,074 - - - - - -

Total 42.905 7 0,016 13 0,030 1 0,002 18 0,042

Appendix 1. Continued

No.

Setting

No. of

hooks

Hiu Lanjaman Bawal Lonjong Ikan Mola Layaran

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

value

Hook

Rate

1 1.012 - - - - - - - -

2 1.100 - - - - - - - -

3 1.100 - - - - - - - -

4 1.100 - - - - - - - -

5 1.100 - - - - - - - -

6 969 - - - - - - - -

7 968 - - - - - - - -

8 1.056 - - - - - - - -

9 1.100 - - - - - - - -

10 1.100 - - - - - - - -

11 1.400 - - - - - - - -

12 1.456 - - - - - - - -

13 1.400 1 0,071 - - - - - -

14 1.400 - - - - - - - -

15 1.400 - - - - - - - -

16 1.400 - - - - - - - -

17 1.400 - - - - - - - -

18 1.400 - - - - 1 0,071 - -

19 1.400 - - 1 0,071 - - - -

20 1.400 1 0,071 - - - - 1 0,071

21 1.400 - - - - - - - -

22 1.400 - - - - - - - -

23 1.400 - - - - - - - -

24 1.400 - - - - - - - -

25 1.400 - - - - - - - -

26 1.400 - - - - - - - -

27 1.400 - - - - - - - -

28 1.400 - - - - - - - -

29 1.440 - - - - - - - -

30 1.440 - - - - - - - -

31 1.380 - - - - - - - -

32 1.440 - - - - - - - -

33 1.344 - - - - - - - -

Total 42.905 2 0,002 1 0,005 1 0,002 1 0,002

Appendix 1. Continued

No.

Setting

No. of

hooks

Naga Barakuda Setuhuk Loreng Layur Hitam

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

Value

Hook

Rate

Total

(fish)

value

Hook

Rate

1 1.012 5 0,494 - - - - - -

2 1.100 8 0,727 - - - - - -

3 1.100 6 0,545 - - - - - -

4 1.100 7 0,636 - - - - - -

5 1.100 8 0,727 - - - - - -

6 969 11 1,135 - - - - - -

7 968 8 0,826 - - - - - -

8 1.056 9 0,852 - - - - - -

9 1.100 10 0,909 - - - - - -

10 1.100 5 0,455 - - - - - -

11 1.400 3 0,214 - - - - - -

12 1.456 4 0,275 - - - - - -

13 1.400 3 0,214 - - - - - -

14 1.400 3 0,214 - - - - - -

15 1.400 2 0,143 - - - - - -

16 1.400 1 0,071 - - - - - -

17 1.400 3 0,214 - - - - - -

18 1.400 3 0,214 - - - - - -

19 1.400 2 0,143 - - - - - -

20 1.400 2 0,143 - - - - - -

21 1.400 4 0,286 - - - - - -

22 1.400 6 0,429 - - - - - -

23 1.400 7 0,500 - - - - - -

24 1.400 6 0,429 - - - - - -

25 1.400 7 0,500 - - - - 2 0,143

26 1.400 6 0,429 - - - - - -

27 1.400 8 0,571 - - - - - -

28 1.400 7 0,500 - - - - - -

29 1.440 10 0,694 - - - - - -

30 1.440 8 0,556 1 0,069 1 0,069 - -

31 1.380 10 0,725 - - - - - -

32 1.440 5 0,347 - - - - - -

33 1.344 8 0,595 - - 1 0,074 - -

Total 42.095 195 0,463 1 0,002 2 0,005 2 0,005