Incubation temperature effects on some hatching parameters of silver rasbora (<i>Rasbora argyrotaenia</i>) egg
Nur Kholifatus Syafariyah, Laksmi Sulmartiwi, Darmawan Setia Budi
Abstract
This study aims to observe the effects of incubation temperature on some hatching parameters of silver rasbora (Rasbora argyrotaenia) egg and determine the optimum temperature to incubate it. A total of 2,000 fertilized eggs were assigned to 20 incubation cylinder plastic tanks (10 L capacity; 30 cm diameter). Every five tanks were placed in four different containers (120 × 80 × 46 cm3) with incubation temperature treatment including 25.0°C–30.0°C (room temperature), 28.0°C, 30.0°C, and 32.0°C. The increase of temperature caused accelerated hatching time, yolk absorption time, and larvae development; it also increased the yolk absorption rate and larvae abnormality rate. A decrease in hatching and survival rate occurred at the highest temperature treatment, so the optimal incubation temperature for silver rasbora egg is 30°C based on the best results of the total hatching rate and survival rate of larvae.