Morphometric Traits and Reproductive Performance of the Nile Tilapia (Oreochromis niloticus): A Study of Condition Factor and Egg Production Across Broodstock Weight Classes

The Kekar tilapia strain has more aggressive and territorial characteristics. Its fast growth, level of disease resistance, and meat structure that is softer than other tilapia strains, make this strain one of the freshwater tilapia strains that have been widely cultivated. This study aimed to analyze the relationship between morphometric characters and egg production in Kekar tilapia. Six weight groups of stocked tilapia broodstock were used in this study, with weights of 350, 450, 1,100, 1,200, 1,300, and 1,700g, respectively. Calculating condition factors begins with determining the relationship between the length and weight of fish, which is used to determine the development of gonads, the percentage of feed that must be given, and the maturity level of fish. The results showed a positive correlation between broodstock size (length and weight) and the number of eggs produced. A Kekar tilapia weighing 1,200g can produce more eggs than Kekar tilapia weighing 1,100, 450, and 350g. Spawning frequency, food availability, and environmental conditions also affect the number of eggs. Regression modeling showed that increased weight and number of spawners could accurately predict increases in egg count, with larger Kekar tilapia producing more eggs in subsequent spawning periods