Potential Use of Sand Goby (Butis amboinensis) Fish Waste in Local Duck Diets and Its Impact on Internal Egg Quality

Abstract

This study aimed to assess the potential of sand goby (Butis amboinensis) fish waste as a feed ingredient in local duck diets and its effects on internal egg quality. The parameters evaluated were egg weight, yolk index, albumen index, and Haugh unit. The experiment was arranged in a Completely Randomized Design (CRD) with four dietary treatments and three replicates, using 16-month-old local ducks with an average body weight of 1.5 kg. The treatments consisted of R0 (basal diet without sand goby fish waste), R1 (basal diet + 5% sand goby fish waste), R2 (basal diet + 10% sand goby fish waste), and R3 (basal diet + 15% sand goby fish waste). The results showed that different inclusion levels of sand goby fish waste significantly affected egg weight (P < 0.05). Although increasing levels of sand goby fish waste resulted in higher yolk index, albumen index, and Haugh unit values, these differences were not statistically significant. In conclusion, sand goby fish waste has potential as a feed ingredient in local duck diets at inclusion levels of up to 15%; however, its effect on improving internal egg quality was not yet optimal.