Determination of some heavy metals levels in common carp fingerlings fed with yeast

N.M. Abdulrahman

doi:10.33899/ijvs.2013.82954

Abstract

This study was carried out at fish laboratory of Animal Production Department, Faculty of Agricultural Sciences, University of Sulaimaniya using commercial dry yeast in three concentration (0%, 3%, and 5%) for 12 weeks to study their effects on concentration of some heavy metals (namely Cr, Cd, Co, Pb, Cu, Fe, Zn, and Mg) of common carp fingerlings (Cyprinus carpio). The experiment was included three treatments each in three replicates (plastic tanks) in which 10 fingerlings common carp of the same size and average weight (3.5 gram) were stocked in each aquarium. The actual experimental feeding trials lasted three months. Results indicated that the concentrations of heavy metals differ among the treatments.

Highlights

The role of heavy metals in aquatic environments is increasingly becoming an issue of global concern at private and governmental levels with heavy metals biomagnifying and increasing their toxicity; high concentrations of heavy metals in surface water could lead to health hazards in man, either through drinking of the water and/or consumption of fish and other aquatic life forms [1]
The experiment was conducted for 12 weeks, using common carp (Cyprinus carpio, 3.5 g average weight) fingerlings obtained from Dukan hatchery
Experimental diets and design Commercial dry yeast was used to study their effects on some heavy metal concentrations in common carp

Summary

Introduction

The role of heavy metals in aquatic environments is increasingly becoming an issue of global concern at private and governmental levels with heavy metals biomagnifying and increasing their toxicity; high concentrations of heavy metals in surface water could lead to health hazards in man, either through drinking of the water and/or consumption of fish and other aquatic life forms [1]. Many aquatic organisms have the ability to accumulate and bio-magnify contaminants like heavy metals, polycyclic aromatic hydrocarbons that are mutagenic and carcinogenic [2]. The ingestion of these contaminants may affect the productivity and reproductive capabilities of these organisms, but affect the health of man [3]. Accumulation of trace elements in the tissues of fish living in aquatic environment depends on many factors [4] These factors include metal contents in water and food organisms, exposure time, environment conditions (e.g., pH, alkalinity, salinity), feed habit, age, and size of fish [58]. The metals entering the aquatic ecosystem may not directly cause damage to organism but they can be deposited in aquatic organisms through the effect of bioconcentration, bioaccumulation and other food chain processes, gets to man in concentrations that pose threats to human health via consumption of seafoods [9]

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Conclusion