Effect of Stocking Density Difference with the Same Amount of Feed on the Growth and Survival of Koi Fish (Cyprinus rubrofuscus) at the Balai Riset Budidaya Ikan Hias (BRBIH), Depok, West Java, Indonesia Rusdi,1 Muhamad Gilang Permana1, Rafika Dinillah1, Siti Nurlaela1, Fitria Pusparini1, Nina Meilisza2, and Joni Hariyadi2
1Biology Education Major, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta
2Balai Riset Budidaya Ikan Hias (BRBIH), Depok, Indonesia
*Corresponding author rusdi[at]unj.ac.id
Abstract
Koi fish (Cyprinus rubrofuscus) have high aesthetic appeal and promising economic value, making them highly sought after by fish farmers. However, the primary challenge in koi fish farming is determining the most efficient and effective conditions, particularly regarding stocking density and optimal feed amounts. This study aims to evaluate the effect of different stocking densities on koi fish larval survival. An experimental method with a simple random sampling design was used, where research subjects were randomly selected and divided into three treatment groups. Each treatment was repeated three times to ensure the accuracy and consistency of results. Three different stocking densities were tested, namely 250, 500, and 750 fish per aquarium with a water volume of 48 liters. The main parameters observed included length, weight, specific growth rate, and larval survival rate. The data obtained were statistically analyzed to determine the significance of differences between treatments. Data were analyzed using ANOVA to test for variations between treatments, followed by Tukey^s test for post-hoc comparisons. The results showed that different stocking densities did not significantly affect the length and weight of the fish, but significantly affected larval survival. Treatment with a stocking density of 250 fish per aquarium resulted in the highest survival rate of 30.13%, indicating that a lower stocking density provided better conditions for koi larvae to survive. These findings provide important guidance for cultivators in optimizing koi fish cultivation efficiently and sustainably.
