International Journal of Aquaculture, 2013, Vol.3, No.14, 73
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http://ija.sophiapublisher.com
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the higher secondary aquaculture produce. One of the
probable causesis because secondary aquaculture organisms
are more adaptable to the environment influenced by
mangrove. In addition, secondary aquaculture maintenance
time is relatively shorter, allowing several harvests in one
cycle. The correlation between mangrove ratio percentage
and secondary aquaculture produce in
Silvofishery
pond
management is presented in Figure 2.
Figure 2 Correlation of secondary aquaculture produce
Silvofishery
pond ratio
Results of regression analysis between secondary
aquaculture produce with mangrove ratio percentage
and ponds with secondary aquaculture produce in
Silvofishery
pond management generates an equation
of y=0.016x+0239, which is interpreted that every 1%
increase in mangrove ecosystem area will increase the
value of secondary aquaculture produce in
Silvofishery
management as much as Rp.16 000 th
-1
with R
2
value
of 0.99. This meansa 99% increase in secondary
aquaculture producein
Silvofishery
ponds. The results
of this study confirm a previous research by
(
Niartiningsih, 1996) who argued that the presence of
mangrove ecosystems
in coastal areas may increase
the catch of shrimp and fish fries.
1.2.3
Direct Benefit Value
Mangrove ecosystem has ecological, economic, and
social functions from which mangrove ecosystem
benefits in the forms of, (1) direct benefit value, (2)
indirect benefit value, (3) choice benefit, and (4)
existence benefit. Mangrove ecosystem direct benefit
value is associated with coastal waters fishery produce
results, be that aquaculture fisheries or catch fisheries.
The direct benefit of mangrove ecosystem is in the
form of coastal waters fishery produce based on the
area of mangrove ecosystem in
Silvofishery
pond
management as presented in Table 3.
Table 3 Average of coastal fihseries produce in the form of mangrove ecosystem direct benefits per
Silvofishery
pond ratio (Rp th
-1
)
Commodity
Ratio (%)
Shrimp
100: 0
60: 40
30: 70
20: 80
10: 90
Milkfish
7.587.000
4.552.200
2.276.100
1.517.400
758.700
Seaweed
6.421.500
3.852.900
1.926.450
1.284.300
642.150
Wild shrimp
3.600.000
2.160.000
1.080.000
720.000
360.000
Wild fish
1.081.000
648.600
324.300
216.200
108.100
CrabsShellfish
1.025.000
615.000
307.500
205.000
102.500
Fish fry
14.625.000
8.775.000
3.387.500
2.925.000
1.462.500
Shrimp fry
625.000
375.000
187.500
125.000
62.500
Shrimp
7.303.625
4.381.000
2.191.100
1.460.700
730.400
Total
6.032.775
3.618.600
1.809.825
1.206.525
603.300
Note: Source: Asbar, 2007
Analysis results of direct benefit value of mangrove
ecosystems in the form of coastal waters fishery
produce reveal apositive correlation with mangrove
ratio percentage and ponds in
Silvofishery
management;
the greater the mangrove ratio, the more coastal water
fisheries results. Figure 3 below describes the
correlation between mangrove ratio percent age and
direct benefits of mangrove ecosystem in the form of
increased coastal fisheries produce.
Results of regression analysis suggest that direct
benefit value from mangrove ecosystems positively
correlates with mangrove ratio percentage and
pondson
Silvofishery
management, resulting an
equation of y = 0.485x-0.347 which is interpreted that
every 1% increase in the size of mangrove ecosystem
will increase direct benefit value as much as Rp.
485.000
th
-1
with R
2
0.99.
This means that 99.9% of