Method to Farm Grouper Fish in Indonesia
When it comes to farming
grouper fish in Indonesia they will do it since the grouper is still in
juvenile form. This is so the fish will get accustomed in staying in the
farming area where they will grow. At first, they will be stored inside the
nursery area which can be on the nusrery pond or special floating net. For the
pond, the sizing usually at 100m by 100m with 1m or 1.5m for the deep. This is
enough for the juvenile to grow inside the pond. Especially since the juvenile
sizing is only in 5cm to 7cm for the length. This makes every m2 of the pool,
you can put inside at around 100 of the juvenile.
The juvenile that staying inside this
nursery pond will then be feed using frozen fish. Then after around 14 days
until 28 days, they will grow bigger with around 10cm to 12cm for the
length. Then the grouper fish in Indonesia farmer will give them different food
which is the trash fish to make them grows larger. Afterward the farmer will
give them another different food which is fish meal, vitamins, and also some
minerals. This will make then grow until 15cm to 20cm for the length. With this
length this means now they have turned to be fry which already enough to be
moved into the next area for growing such as growing pond which will have
brackish water or on larger net cage.
For now let us discuss the farming method
done in Indonesia which using the net cage as the growing place. Is method is
done when the growing place is near the sea area that can give them brackish
water naturally. Of course, there should not be any predators in the growing
place that might threaten the fishes. The place should also have strong wind as
well as wave with enough flow for the water to exchange. The water itself
should also have the right quality which needed by the grouper fish when
growing inside the net cage.
For the net cage grouper
fish in Indonesia farming, the cage itself will be consisting of poles
and net. For the poles they will be made using bamboo and for the net it will
be made using polyethylene. The net itself will consist of two panels which
will be forming the cage structure. The first panel will be use to made up the
four sides of the cage structure. Meanwhile the second panel will be use to
made up the bottom flooring of the cage structure. Then this cage structure
will be tied into the poles using rope for secure in raft like for the
structure. There would be several buoyancies which also tied into the structure
that is created using water gallon.
Meanwhile for the water in the place should
also have temperature that stays in between the 30 degree down to 27 degree of
Celsius. Then it should contained oxygen as much as in 5 mg/liter with the
level of salinity is at 30 percent down to 26 percent and the level of ph is at
8.3 point down to 7.8 point. Thus before the farming use the place to grow the
grouper fish, this means that the farmer will need to test the quality of the
water to ensure every properties are suitable for the grouper fish.
The yielding result that the grouper fish in Indonesia farmer will get is
actually depends on the place where the net cage is located as well as other
factors such as the properties of the feed and water. In normal condition with
5m x 5m x 3m sizing net cage, the yielding result will be at 600kg. It will
take around 7 months for the grouper fish to grow from the juvenile state until
they can have 600 gram weight.
For the farming that is done in the pond,
then the density will really affect the yielding result. This is the reason
why; the depth of the pond should be at 2m. Then the bottom area of the pond
will be leveled to help with the harvesting process. For the sizing, the pond
can have at around 0.2ha to 0.3ha sizing with around 1.5m for the height. After
the sizing is correct, then what needs to be done is to provide water with the
right properties inside the pond area. Do not forget that the properties of the
water used in the pond are different with the properties of water used in the
previous method. For the pond then the water properties should be in 330 mg/liter
for the level of salinity then the temperature should stays in between the 32
degree down to 16 degree of Celsius.
Actually the result that this farming
method provided is very large which will make up a lot of amount. Especially since
the result can reach around, 19 tons to 20 tons of grouper fisher in one
hectare of the pond. As you can see, this result is very large which surely
help with the supply of grouper fish in Indonesia
to the world market. These also make them able to get large part of the market
share especially in this specific industry. There is no doubt that the great
production quality that the country has also gives grouper fish product high
quality which searches by market people around the world.
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