Incubation temperature effects on some hatching parameters of silver rasbora (Rasbora argyrotaenia) egg

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.

KEYWORDS:

• Early life-stadia
• yolk absorption
• larvae development
• abnormality

Conflicts of interest

Authors have no conflicts of interests.

Acknowledgments

The authors are grateful to all colleagues in the study program for their help and technical assistance in laboratory analysis. In addition, the authors thank the Technical Implementation of Unit Development of Freshwater Aquaculture of Umbulan (Pasuruan, East Java, Indonesia) for fish broodstocks material support. This research was the undergraduate thesis study of Nur Kholifatus Syafariyah, who received no funding from any agency.