KONINKLIJKE ACADEMIE VOOR OVERZEESE WETENSCHAPPEN ...

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4. Conclusions
Throughout research treatments on artificial propagation, nursing and intensive
culture system of climbing perch, we have clarified some of the following
problems:
— Pellet feed with 30% protein and feeding rate of 1.5-2% of total body
weight of fish per day could be used to supply feed for fish maturation in culture
systems.
— Three kinds of hormone stimulation of the pituitary gland of the common
carp, LH-RHa + DOM and HCG, can be used for artificial propagation of
climbing perch at concentration levels of 10 mg pituitary gland of common
carp, 70 mg LH-RHa and 3,000 UI HCG per kg of female brood stock,
respectively, to get high efficiency.
— The growth of climbing perch larvae’s nursing in the earthen ponds amounting
to 3.057 g/fingerling was a little faster than in concrete tanks, and similar
to those by using natural food at the same stocking density of 1,000 larvae/m2.
The survival rate of climbing perch nursing in concrete tanks obtained from
14.27-16.5 % was higher than in earthen ponds of 5.9-10.7 %.
— In an intensive culture system in earthen ponds, the mean final body weight
of climbing perch amounting to 66.4 g/fish in treatment II (50 fish/m2) was
lower than that in treatment I (30 fish/m2) which obtained 71.5 g/fish. The
total fish biomass obtained in treatment II of 24,600 kg/ha was higher than
that in treatment I of 21,300 kg/ha. The cost ratio benefit and the cost ratio
profit in treatment II (1.56 and 0.56) were lower than that in treatment I (1.64
and 0.64 respectively).
— The experimental treatment I at 30 fish/m2 could be the best technical solution
to recommend for climbing perch intensive culture system to improve
farmer’s income in the Mekong Delta.
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