ABSTRACT
Fish by-products were fermented with Lactobacillus plantarum at 30ºC
using molasses as carbohydrate source. The ensilage process was completed
after 30 days and at the end, a desirable and stable pH (4.5) was attained.
Dried tomato by-product meal (TBM) and potato by-product meal (PBM)
were used as alternative filler and blended with the liquid silage (40:30:30
w/w) and sun-dried. The resulting dried silage meal was included in the
experimental diets to replace 0, 10, 20, 30, 40 or 50% of dietary protein (by
weight) in isonitrogenous (30% CP) and isocaloric (2700 kcal ME/kg)
pelleted diets. No significant differences were found for apparent
digestibility coefficient (ADC) of dry matter (DM), crude protein (CP), ether
extract (EE) and nitrogen free extract (NFE) up to 30% inclusion level, while
the highest inclusion levels (40 or 50%) significantly reduced ADC for DM,
CP, EE and NFE.
In a 90-day growth trial, the replacing of dietary protein by fish silage
protein up to 30% of dietary protein in tilapia diet had no significant effect
on growth performance including final body weight (BW), body length (BL),
condition factor (K), weight gain (WG) and specific growth rate (SGR). The
highest replacing levels (40 or 50%) significantly (P |
