Abstract
The impact of captive rearing of snails (Archachatina marginata) on the bio-accumulation of some heavy metals (HMs) (Fe, Mn, Cu, Pb, Co, Ni, Cd and Cr) in the meat and haemolymph was evaluated in a two treatment trial (snails from the wild, (SW) and captive reared snails, (SC), each comprised of sixty snails of three replicates. Alldata collected (using standard analytical procedures) were subjected to ANOVA and significant means separated by Duncan Multiple Range Test. The trial revealed that the meat of SC had outstanding (P>0.05) Fe (22.30mg/kg) and Mn(4.79mg/kg), with no significant variation for DM, while the haemolymph recorded non-significant (P< 0.05) concentration for (Mn, Pb, Co, Ni, Cd and Cr). Its levels of Fe (3.50mg/kg) and Cu (2.06mg/kg) were however significantly (P>0.05) impacted by captive rearing. Generally the level of Cr in the meat and haemolymph were higher than 0.05mg/kg recommendation by WHO, hence snail meat and haemolymph must be consumed with caution and guidance.
Highlights
This study determine the bioaccumulation of heavy metals, such as Fe, Mn, Ca, Pb, Co, Ni, Cd, Cr, in the meat and haemolymphs of snail collected from the wild and those reared in captivity; which will guide on the safety of consumption of snail and its products in the study area
It has corroborated the findings of Omole (2002) that snail meat is a good source of cheap nutritional iron for the rural dwellers, he further submitted that the iron level of snail meat is higher than what is found in the meat
The levels of chromium in the two treatments snail from the wild (SW) (1.80ug/dl) and SC (2.00ug/dl) for the meat were above the FAO and WHO (2016) reference value of 0.05ug/g for food crops and vegetables reported by Prabhat et al, 2019; the meat of snail for the fear of chromium level must be consumed with caution, because they may not be degraded by heat treatment during cooking
Summary
This study determine the bioaccumulation of heavy metals, such as Fe, Mn, Ca, Pb, Co, Ni, Cd, Cr, in the meat and haemolymphs of snail collected from the wild and those reared in captivity; which will guide on the safety of consumption of snail and its products in the study area.
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