Pond farming and co-culture options in...
Transcript of Pond farming and co-culture options in...
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Pond farming and co-culture
options in Vietnam
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2005 2006 2007 2008
Are
a (
ha)
Year
Van Phong Bay, Khanh Hoa, Vietnam
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•Around a dozen
farmers
•Producing 2-3 t/
ha/annum
•Seed from RIA 3
hatchery at 2
sizes
•Farmers sell to
local dealers
gutted only
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Hatchery Hapas
2-5g
20-50g Advanced nursery in
best ponds
7-9
month
gro
w-o
ut
Sea
Ranching
Limited to best ponds
due to wet season
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= growout ponds
= nursery ponds
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•10 sandfish of ca. 50g per tank (high density!)
•Shrimp @ three densities
Low =15 m-2
Med =25 m-2
High =50 m-2
•Shrimp treatments fed according to standard
procedures
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Shrimp density
45
55
65
75
85
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105
115
0 15 30 45 60 75
Days
Low
Medium
High
Control
Weig
ht
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0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
Low Med High control
Surv
ival ra
tes (
%)
Shrimp density
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0
20
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Low Med High control
Surv
ival ra
tes (
%)
Treatments
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Co-culture
Sandfish 0.5/m2
Shrimp 25/m2
Rotation
Sandfish 1/m2
Shrimp 50/m2
Co-culture
Sandfish 1/m2
Shrimp 15/m2 Sandfish 1/m2 Sandfish 15/m2
Controls Direct comparison ‘Most likely….’
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Total mortality
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Fallo
w P
eriod
Shrimp Sandfish
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