Effects of temperature(15℃, 20℃, 25℃ and 30℃), pH value(pH 5.2, pH 6.0, pH 6.8 and pH 7.6) and salinity(0‰, 12‰, 24‰ and 36‰) on the hatching of angelfish(Pterophyllum eimekei) were investigated. The fertilized egg of angelfish was ad...
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다국어 초록 (Multilingual Abstract)
Effects of temperature(15℃, 20℃, 25℃ and 30℃), pH value(pH 5.2, pH 6.0, pH 6.8 and pH 7.6) and salinity(0‰, 12‰, 24‰ and 36‰) on the hatching of angelfish(Pterophyllum eimekei) were investigated. The fertilized egg of angelfish was ad...
Effects of temperature(15℃, 20℃, 25℃ and 30℃), pH value(pH 5.2, pH 6.0, pH 6.8 and pH 7.6) and salinity(0‰, 12‰, 24‰ and 36‰) on the hatching of angelfish(Pterophyllum eimekei) were investigated.
The fertilized egg of angelfish was adhesive and demersal. Also, the elapsed time of hatching was 53.5 hours and the hatching rate was very high in freshwater at 30℃. The lower the water temperature was, the longer the hatching elapsed time was. At 15℃, the mortality was very high and the hatching process was highly inhibited.
The hatching rate was very high in freshwater at pH 6.8 and the effect of pH was not higher than that of salinity. In salinity more than 12‰, the hatching process stopped and all embryos died out.
The optimal water temperature for hatching of angelfish in freshwater was at 30℃ and the optimal pH for that was 6.8.
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