he bulk densities of all four feed types varied significantly
(p< 0.05). The diet containing the soybean meal had the highest
mean bulk density of 537.33±1.80 g L
−1
. The inclusions of the copra
and palmkernel meals resulted in lower mean feed bulk densities of
344.26±3.11 and 384.00±2.92 g L
−1
respectively. The control diet
had a mean bulk density of 407.73±3.49 g L
−1
. Sinking velocities of
the pellets were positively correlated (p< 0.05;r
2
= 0.979) with feed
bulk densities. The pellets of the soybean meal diet recorded the
highest mean sinking velocity of 10.75±0.99 cm s
−1
which was significantly higher (p< 0.05) than the pellet sinking velocities of the
other three diets (Fig. 1). The palm kernel meal diet and the control
diets recorded similar mean sinking velocities of 7.70±0.84 and
7.80±0.95 cm s
−1
respectively. The 30% inclusion of copra meal to
the diet reduced the mean sinking velocity of the resulting pellets
to 7.13±1.06 cm s
−1
which was significantly lower (p< 0.05) than
the other feed types