Carppädücdn—
_
301;
Fish production efficiency, that isthe
pro—
duction transfered to daily fish production, is a very significant indication
of the production processes.
How much fish is produced per day from the orga—
nic
matter
produced daily ? That is the
All
the
available
data
plotted indicate an\ inverse efficiency relation— between
increasing primary production and
thë‘primary‘ production le—
vel
is
higher, production efficiency decreases. The decrease is moderate in
inorganic fertilized ponds and very significant in…allochtonous…organic loa—
…ded _ponds (Fig. 3) .
efficiencies however increase if the organic matter
introduced
daily increases.
Efficiency may reach 7.5 % with a dailymanuring
rate of about 5 g C/m2.
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