The study investigated oxidative stress induced by Aflatoxin B1 (AFB1) in selected palaemonid
shrimps. The shrimps were fed with Aflatoxin B1 of 0, 2, 5, 10, 20, and 40 μg/kg in mixtures of
shrimp feed. The impact s of the concentrations on the growth rate of the shrimps and the
induced Oxidative stress were assessed. Growth rate was estimated using standard growth rate,
mean weight gain, feed conversion rate and survival rate; while oxidative stress was estimated
using levels of Superoxide dismutase (SOD). Generally, AFB 1 of 40 μg/kg bw highly impacted
the growth of all species, followed by 20 μg/kg bw. i.e. the shrimps in the treatment elicited
significantly reduced standard growth rate and mean weight gain. Elevated concentrations of
SOD detected in all shrimp species at AFB1 concentration of 20 μg/kg bw, particularly 40 μg/kg
bw further supported the toxicity observations in the treatments. According to the profile of
antioxidant activities and growth analysis, the trend of resilience to AFB 1 was: Macrobrachium
vollenhovenii >Macrobrachium macrobrachion >Macrobrachium dux >Macrobrachium
fellicinium > Palaemon maculatus > Nematopalaemon hastatus. This implies that M.
vollenhovenii followed by M. macrobrachium have higher success potentials in small and middle
scale shrimp farms vulnerable to aflatoxin exposure. Palaemonid shrimp farm feeds should be
regularly screened to ensure the concentration of AFB1 does not exceed 10 μg/kg bw