Acute and Chronic Toxicity of Endocrine Disruptive Heavy Metals and Pesticides Exposed to Freshwater Fish P. reticulata and P. sphenops

Vidhya Varghese,N Nagarani,A Balasubramani

doi:10.12944/cwe.16.2.09

Abstract

Environmental monitoring is a recent world-wide approach to save the future in line. The present study focuses on toxicity of heavy metals and pesticides on the freshwater aquarium fish (Poecilia reticulata and Poecilia sphenops). The study intense on drawing the acute and chronic safe levels of metals and pesticide exposed to 96 h and 28 day respectively. On exposure, the fish were observed to be under stress and showed excitability. It was observed that both species were highly sensitive to arsenic and cypermethrin, meanwhile resistant to cadmium and chlorpyrifos. The acute safe levels for As irrespective of species was comparatively lesser than that of Cd exposed fish and the range of safe values for pesticides exposure were between 0.018 and 0.059 ppb. As the water quality is influencedby many environmental factors, the present study helps the aquarist in monitoring the safe level of toxicants in the medium. This in turn increases the economic growth of the aquarist.

Highlights

India is rich in diversity of organisms and plays a prominent role in international market in ornamental fish due to its rusticity and color patterns
Maintenance of water quality is essential for survival, growth and physiology of aquatic organisms
The release of various pollutants including endocrine disruptive chemicals affects the quality of aquatic medium and leads to impairment of life in the aquatic environment

Summary

Introduction

India is rich in diversity of organisms and plays a prominent role in international market in ornamental fish due to its rusticity and color patterns. Research in aquaculture is important to maintain the potential resource of income generation through entrepreneurship in the rural areas of Tamil Nadu.[2] Water quality is very important for survival and wellbeing of all the aquatic organisms. Toxicants from both point and non-point sources reach the aquatic ecosystem and pollute the environment through their receiving water bodies.[3] These toxicants cause

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