achievements and bottlenecks for … and bottlenecks for yellowfin tuna, thunnus albacares...
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![Page 1: ACHIEVEMENTS AND BOTTLENECKS FOR … AND BOTTLENECKS FOR YELLOWFIN TUNA, Thunnus albacares PROPAGATION AT THE GONDOL RESEARCH INSTITUTE FOR MARICULTURE, BALI INDONESIA Jhon Harianto](https://reader031.vdocuments.site/reader031/viewer/2022013014/5abaf7b27f8b9ad1768c2ce5/html5/thumbnails/1.jpg)
Research Institute for Mariculture, Bali-Indonesia
ACHIEVEMENTS AND BOTTLENECKS FOR YELLOWFIN TUNA, Thunnus albacares
PROPAGATION AT THE GONDOL RESEARCH INSTITUTE FOR MARICULTURE, BALI INDONESIA
Jhon Harianto Hutapea, I G.N. Permana and I N.A. Giri
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Propagation of yellowfin tuna was initiated in
Indonesia in 2003
Indonesia and Japanese government, constructed
a land-based broodstock holding facility at the
Gondol Research Institute for Mariculture
Collaboration was terminated in 2006
INTRODUCTION
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Since 2008, project has been supported by :
Australian Centre for International Agricultural
Research (ACIAR) collaborate with:
South Australian Research and Development
Institute (SARDI),
Challenger Institute for Technology, Fremantle,
Western Australia.
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Collecting candidate broodstock
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Treatment and transfer from medical tank
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Tag reader
Microchip
Tagging and transferred
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Vitamin C (500mg) Vitamin E (Aquamix E50)Vitamin MIX
FEEDFEED
Scad mackerel (Decapterussp.) and Squid (Loligo sp.)
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Transfer from Acclimation tank (5 kg/fish)
Broodstock tank (1500 m3 -18 m dia.; 6 m depth Semi closed system)
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The optimum size for best survival rate in:
transportation,
captivity,
and daily growth rate
2-3 kg
Bottleneck:
Capture with hand line has low probability
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Growth pattern of YFT Broodstock in captivity
y = 6,1114x + 22,349R2 = 0,3244
0
20
40
60
80
100
120
0 2 4 6 8 10
Initial BW (kg)
Dai
ly g
row
th (g
/day
)
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0
1
2
30:00-2:00
2:00-4:00
4:00-6:00
6:00-8:00
8:00-10:00
10:00-12:00
12:00-14:00
14:00-16:00
16:00-18:00
18:00-20:00
20:00-22:00
22:00-0:00
Problem in rearing yellowfin tuna in concrete tanks :wall strikes
This mortality imposes a high cost --- continuous replacement.
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Fig. 1 Water Temp. in Broodstock Tank
First Spaw ning, Oct. 25, 2004.
28.8 oC
Restart Spawning Aug. 15, 2005.
28.2oC
26
27
28
29
30
31
32
1-Ja
n11
-Jan
21-Ja
n31
-Jan
10-F
eb20
-Feb
2-Mar
12-M
ar22
-Mar
1-Apr
11-A
pr21
-Apr
1-May
11-M
ay21
-May
31-M
ay10
-Jun
20-Ju
n30
-Jun
10-Ju
l20
-Jul
30-Ju
l9-
Aug19
-Aug
29-A
ug8-
Sep18
-Sep
28-S
ep8-
Oct18
-Oct
28-O
ct7-
Nov17
-Nov
27-N
ov7-
Dec17
-Dec
27-D
ec
Days
Tem
p. (o C
)
2003 2004 2005 2006 2007
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Estimated age at initial spawning in captivity : 2,5 - 3 yearsAt Body weight approximately : 20-30 kg
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0
20000
40000
60000
80000
100000
120000
140000
25-Oct
26-Oct
27-Oct
28-Oct
29-Oct
30-Oct
31-Oct
1-Nov 2-Nov 3-Nov 4-Nov
2004
0
500000
1000000
1500000
2000000
2500000
3000000
Dat
e
22-A
ug
30-A
ug
7-S
ep
19-S
ep
29-S
ep
7-O
ct
15-O
ct
23-O
ct
1-N
ov
10-N
ov
19-N
ov
27-N
ov
5-D
ec
13-D
ec
21-D
ec
29-D
ec
2005
0200000400000600000800000
1000000120000014000001600000
Dat
e
7-Ja
n
14-J
an
21-J
an
28-J
an
4-Fe
b
20-F
eb
27-F
eb
6-M
ar
13-M
ar
20-M
ar
27-M
ar
3-A
pr
10-A
pr
17-A
pr
24-A
pr
2-M
ay
12-M
ay
19-M
ay
2006
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
Date 14-Mar 16-Mar 17-Mar 4-Apr 29-Jun 30-Jun
2007
Frequency of spawning and number of eggs produced
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Embryo Development
Eggs produced: 500,000 – 2 mil. per spawning.
Egg diameter 850 – 950 µm.
Hatching rate 50 -100 %.
Optimum incubation temperature 28 oC at natural salinity
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2006Study on larval development and mass culture
Metamorphose to juvenile at 45 DAH
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e
hd
c
d
b
g
f
i
a
Life cycle of endoparasite(Ichthyodinium chabelardi) , infected yellowfin tuna eggs
Highest productivity of fish was in 2005-2006 : 246 times spawning
Continuousspawninglead to endoparasiteInfection since the 40th
spawning
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Optimum size for the candidate broodstock is
2-3 kg
Fish transport. methods need to be improved.
The biggest problem in rearing broodstock in
concrete tanks is wall strikes
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Size of YFT at first spawning in the tank
estimated to 25-35 kg/fish (at the second year
in the tank.)
Highest productivity of fish was in 2005-2006
(3-4 year in the tank) and productivity
declined sharply in 2008.
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