KONINKLIJKE ACADEMIE VOOR OVERZEESE WETENSCHAPPEN ...

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Fig. 8. — Male of climbing perch.
3.1.4.1. Experiment la: Fish Artificial Propagation by Using HCG
The results of artificial propagation of fish by using HCG (Ul/kg of fish) at
five concentration levels are presented in table 3.
Hormone
levels
Table 3
Spawning rate (%), spawning time, fecundity, fertilization rate and hatching rate (%)
of climbing perch by using HCG hormone stimulation
T Spawning
rate
Spawning
time
Fecundity Fertilization
rate
Hatching
rate
(°C) (%) (h) (Eggs/kg) (%) (%)
1,500 Ul/kg 26 2 5 - 7:45 514,091 ' 92.2 ■ 98.9 ‘
2,000 Ul/kg 26 25- 7:42 609,091 b 9 7 .0 ' 98.3-
2,500 Ul/kg 26 25* 7:40 558,334b 97.2* 98.6-
3,000 Ul/kg 26 100" 7:13 658,864 » 9 1 .2 ' 98.9-
3,500 Ul/kg 26 7 5 ' 6:57 579,2506 90.2 b 9 7 .6 '
(a,b) values in each column sharing same superscript are not significantly different (p > 0.05).
The results show that the lowest spawning rate (25 %) and fecundity
(514,091 eggs/kg) was obtained with an hormone concentration level of 1,500
Ul/kg. There were no statistically significant differences (p > 0.05) in fecundity,
fertilization and hatching rate between HCG hormone concentration levels from
'2,000 Ul/kg to 3,000 Ul/kg. Fecundity of fish was fluctuating between 558,334
and 658,864 egg/kg, obtained from stimulation hormone concentrations of
2,000-3,000 Ul/kg. The fertilization and hatching rate were 97 to 97.2 % and
98.3 to 98.9 % respectively. In comparison to the other parameters related to fish
breeding, the spawning rate of 100 % and the fecundity of 658,864 egg/kg
obtained from the concentration level of HCG hormone of 3,000 Ul/kg was the
best concentration for artificial propagation of climbing perch.