Abstract
ABSTRACT In this work, we studied the digestibility, growth, blood chemistry, and enzyme activity of Nile tilapia (Oreochromis niloticus) juveniles (0.95±0.18 g) using different animal (fish silage meal, whey meal, bovine blood meal, and red crab meal) and plant (extruded bean, extruded chickpea meal, coconut paste, Jatropha curcas meal, and chickpea meal) dietary byproducts. Nine isocaloric diets (321.92±9.10 kcal g−1) were evaluated for 60 days. The highest digestibility of crude protein values for animal and plant sources were obtained for [...]
Highlights
Nutritional studies on tilapia aquaculture are still needed to reduce the high costs generated by feeding and to optimize food utilization for achieving the better growth performance of fish. Parameters such as weight gain, growth, and survival (García-Ulloa et al, 2013) among others are commonly related to food source, content, biochemical composition of ingredients and diets (Job et al, 2015), and dietary energy balance, which are utilized as evaluation tools to properly interpret fish performance by a given diet or ingredient
In diets containing animal byproducts, the higher mean values for apparent digestibility coefficient for dry matter (ADCDM) and ADCCP (P
For the plant byproduct diets, the higher ADCDM and ADCCP values were showed by the RD group (P
Summary
Nutritional studies on tilapia aquaculture are still needed to reduce the high costs generated by feeding and to optimize food utilization for achieving the better growth performance of fish. The configuration of the intestine provides an advantage to Nile tilapia in digestion and absorption of nutrients when a less energy-efficient herbivorous diet is used (Tengjaroenkul et al, 2000), in which enzymes, chemicals, and proximal components directly affect its growth responses. This way, the dietary inclusion of ingredients validated by the interaction of several digestive indexes may offer physiological advantage in knowing the nutritional requirements and biological responses of tilapia
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