Comparative Postnatal Determination of Absolute Brain Weight and Size using Body Morphometric Parameters in the African Giant Rat (Cricetomys gambianus)
One neuroanatomical measure found to allometrically scale the body is brain's size. Species with larger brains relative to body are better complex information processors. We compared absolute brain weight (ABW), generated regression formulae and determined intelligence level in each age group of African giant rat (AGR) using encephalization quotient (EQ). Twelve rats in each age group, neonates (1-70 g), juveniles (70-450 g) and adults (?700 g) were used. Positive linear relationships existed between live body weight (LBW) and ABW in neonates (r2 = 0.58; p
Key Words: African giant rat, brain, correlation, encephalisation quotient, regression analysi