International Journal of Aquaculture, 2013, Vol.3, No.14, 73
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Table1 Average of primary aquaculture produceper
Silvofishery
pond ratio (Rp/th)
Commodity (Rp)
Ratio ( % )
100:0
60:40
30:70
20:80
10:90
Shrimp
3627.450
6886.350
7948.350
9009.450
Milkfish
3000.000
5250.000
6000.000
6750.000
Average
3313.725
6068.175
6974.175
7879.725
Note: Source: Analysis result (2011)
This analysis results show that primary aquaculture
produce on the
Silvofishery
management negatively
correlates with mangrove ratio percentage, the greater
mangrove ratio than pond ratio on
Silvofishery
pond
management, the lesser primary aquaculture produce;
in contrast, coastal fisheries produce of wild shrimp
and wild fish as well as direct benefit from mangrove
ecosystem increases. There is a negative correlation
between the mangrove ratio and primary aquaculture
produce both directly and indirectly. (1) directly, the
greater mangrove ratio than ponds in
Silvofishery
management, the narrower the area allotment for the
primary cultivation, and (2) indirectly, the greater the
mangrove ratio than ponds, mangrove litter produce is
higher and potentially affects the quality of soil and
water and prevents the primary aquaculture organism
from being able to optimally adapt to the environment
to minimize mortality and maximize growth rate
(
Beukeboom, 2012). The correlation between mangrove
ratio percent age and primary aquaculture produce in
Silvofishery
management is presented in Figure 1.
Figure 1Correlation between primary aquaculture produce per
Silvofishery
pond ratio
Results of correlation and regression analysis between
the percent age of mangrove ratio and pond ratio and
primary aquaculture produce generate the following
equation y=-0.091x+8.800 which is interpreted that
each 1% decrease in mangrove area will increase the
of primary aquaculture produce in
Silvofishery
ponds
by Rp 91.000 th
-1
with value of R
2
=
0.99.
This means
that 99% increase inprimary produce may explainits
association with the mangrove and ponds ratio
percentage on
Silvofishery
management, while the
remaining 1% of aquaculture produce can be
explained by other factors. This study results confirm
a research conducted by (Naamin, 1990) who argued
that the presence of mangroves in the area surrounding
ponds increases ponds produce.
1.2.2
Secondary Aquaculture
The study analyzes the secondary aquaculture produce
in
Silvofishery
ponds consisting of various types of
wild shrimp and wildfish. Both commodity types are
considered as secondary because they are regarded as
produce, even if stocking of both types of organisms is
not carried out. The secondary aquaculture produce
analysis results reveal average scoresas follows: (1)
wild shrimp of 59.40 kg·ha
-1
·
yr
-1
,
and (2) wild fish of
69.30
kg·ha
-1
·
yr
-1
.
The main aquaculture produce per
Silvofishery
pond ratiois presented in Table 2.
The analysis results suggest that the secondary aquaculture
produce has a positive correlation between mangrove
ratio percent age and ponds with secondary aquaculture
produce in
Silvofishery
management. Unlike primary
aquaculture produce, The greater the mangrove ratio
percentage than pond ratio in
Silvofishery
management,
Table 2 The average of secondary aquaculture produce per
Silvofishery
ratio (Rp/th)
Coomodity (Rp)
Ratio (%)
100 : 0
60 : 40
30 : 70
20 : 80
10 : 90
Wild shrimp
1625.000
875.000
750.000
500.000
Wild fish
875.000
562.500
437.500
312.500
Average
1250.000
718.750
593.750
405.250
Note: Source: Analysis result (2011)