Seeds selection
What
is seed?
"Fish
seed or baby fish refers to the industrial term of juvenile life stage of fish,
which applied to either fry or fingerling stage."
source: google.com
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Understand little fact about Juvenile fish development stage
- Egg
- Hatching (larvae)
- Spawn
- Fry
- Fingerling
Hatching or larvae is
the term refers to the newly hatched fish with egg yolk still intact on their
body. This egg yolk will be the source of food since the mouth is not formed yet
and they couldn’t get any nutrition from outside
Spawn is when the egg the yolk is already absorbed and month begin to form
They are already
started enjoying small zooplankton like rotifers.
Fish will turn
into fry when they reach around 2-3 cm length; it takes
about 7-10 days after the spawn stage to grow up to fry.
Fingerling is the final
stage of the juvenile stage. By this time it starts looking like tiny fishes with the month and functional stomach in its place. At this stage reaches around 15
cm. It takes about 30–60 days for the fry to grow up
to fingerling size.
Suitable size for
seed in Biofloc is 3 Inc and of 10 gm. It is highly recommended to select
Same size seeds for
tank because big size fish won’t let small fish eat, It’s common sense and you will have different sizes of fishes which will be hard to sell.
How
to check seed
Buy active seeds. To check flap on the water and monitor the seed response rate. All fishes will move, you will
notice dull or sick seeds if any. Check for Light intensity on aggressive
behavior.
Observer fish
movement when you flap on water. Look for Bright skin color and Check body line
Important
tip regarding seed selection
Culture single
species of a fish in a pond and the same size of fish seed. This will help in the selection of feed as per the requirement of specific fish bread and the growth
of the fish will be good. And you can harvest same size of fish.
Where
to buy fish seeds?
Buy seeds from
hatchery where they bread in a natural way Preferable buy seeds from natural
lakes rather than form cemented tanks. The naturally breaded fish seed will have
better immune against the disease as compared to the one hatched artificially.
Seeds will be little
costlier from Natural lake because the production is less than the artificial
tanks. It is quite difficult to find natural hatchery these days.
Although the seed
form farm tanks will be cheaper but Wrong seed can cost you heavily to Biofloc
farmer. This could cost in running loss, due to slow weight gain, mortality
and cost of medicines could also add up for the prevention and treatment of
diseases.
Seed from the natural pound can bear temperature up to 35 degrees. Tiny fish at their juvenile stage gathers at kinara where the temperature can reach 37 degrees that
make them prone to survive at height temperature. whereas the seed from
cement tank where the temperature is maintained or cant reach much heigh seeds are much
more sensitive to high temperature, any fluctuation to the temp will cost in
mortality. that’s why the mortality of such seeds are much heigh in
comparison to the natural pond seeds.
Tip:
find
out temp of the tank of your seed hatchery and Maintain the same temp of in your
Biofloc tank before releasing seeds.
About the brooder fish ( fish used for breeding)
Ideally, the Brooder fish should be of good quality for good seeds but is not always easy to check it prior to
purchase
Grading
of fish seeds in Biofloc tank.
What is grading ?
grading is sorting of fish seed as per their size so that same size of seed can
be kept in a tank to help them grow evenly and fast. Why grading is important?
Greading is vital for
growth. Same size fish grow faster and effect FCR in a positive way. Remember big
fish won’t let small fish eat? Grading should be done every 2 months for better
result.
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