Production of Maggot Using Two Substrates and Its Effect as Complete Ration on The Growth of Clarias Gariepinus Juveniles
Abstract
The rising cost of feeds in aquaculture has necessitated the need for alternative and cheaper sources of animal protein in feeding fish. This study investigated the effects of Maggot as a complete feed ration in juveniles of Clarias gariepinus. The maggots were produced from two substrates: Poultry droppings and Fish offal. They were harvested using screening method, after harvesting, 50.0% of harvested maggots were preserved fresh by refrigeration at 10 0C, while the other 50.0% were preserved by sun drying for four hours. One hundred and twenty juveniles of C. gariepinus were fed with four dietary treatments: A – Fresh Maggots from Poultry droppings; B – Dry Maggots from Poultry droppings; C – Fresh Maggots from Fish Offal and D – Dry Maggots from Fish Offal. They were fed twice daily at 5% body weight for a period of 42 days. The results obtained indicated that the fish fed Diet C recorded the highest values of weight gain (53.00 ± 36.71g); length increase (8.23 ± 1.10 cm); mean weight gain (8.83 ± 6.11g); Percentage weight gain (96.81 ± 46.57%); Specific growth rate (1.93 ± 0.39%) and relative growth rate (83.79 ± 5.58g). While, the lowest values of weight gain (20.00 ± 15.00g); length increase (4.46 ± 1.66cm); mean weight gain (3.33 ± 2.50g) were recorded in fish fed Diet D. Also, the lowest values of: Percentage weight gain (40.72 ± 12.64%); Specific growth rate (1.26 ± 0.24); relative growth rate (69.85 ± 7.57) were obtained in fish fed with Diet B. The results of the nutrient utilization parameters indicated that fish fed with Diet C had the lowest (0.91 ± 0.14) food conversion ratio , while Diet B recorded the highest (1.25 ± 0.15). For Protein Efficiency ratio, the highest value (1.14 ± 0.09) was observed in fish fed Diet C and lowest in Diet A (1.06 ± 0.03). The result of percentage survival of the fish recorded from the study varied significantly among the dietary treatments, with higher survival rate from the fish fed Diets A and C. In all, the use of maggot as a complete ration appears to have a positive impact on growth performance and the nutrient utilization of C. gariepinus. Based on the results obtained from this experiment, Diet C (Fresh Maggots from Fish Offal) is hereby recommended for Optimum growth and feed utilization in the juveniles of C. gariepinus.
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