Prescribing sea water quality criteria for arsenic, cadmium and lead through species sensitivity distribution.

Water quality standards are essential for regulation of contaminants in marine environment. Seawater quality criteria (SWQC) for arsenic (As), cadmium (Cd) and lead (Pb) have not been developed for India. The aim of this study is to derive the SWQC for the metals based on Species Sensitivity Distribution (SSD).

A multibiomarker approach to assess lead toxicity on the black clam, Villorita cyprinoides (Gray, 1825), from Cochin estuarine system (CES), southwest coast, India.

The southwest coast of India along the Cochin region is seriously affected by metal contamination from increasing industrial activities. This contribution pertains to the chronic toxicity effects of lead and its biomarker responses on the black clam, Villorita cyprinoides, largely endemic to Southern India. The metal concentration (lead (Pb), copper (Cu), zinc (Zn), cadmium (Cd), nickel (Ni), and chromium (Cr)) and contamination indices such as geoaccumulation index and contamination factor suggests that the Cochin estuarine system (CES) is moderately to heavily polluted with metals.

Effect of selenium on Penaeus monodon and Perna viridis: Enzyme activities and histopathological responses.

The study was carried out to evaluate enzyme activities and histopathological changes due to the effect of acute and chronic definitive toxicity of selenium (Se) on the post larvae (PL) of giant tiger shrimp (Penaeus monodon), and green mussel (Perna viridis). The 96-h Median Lethal concentration (LC) for the PL of shrimp was 3.36 mg L and the chronic value for the long-term survival endpoint in a 21-d exposure was 0.

Toxicity of Nickel on the Selected Species of Marine Diatoms and Copepods.

Toxicity values for nickel on marine diatoms and copepods were derived based on bioassay tests. The 96 h IC of nickel on diatoms, Odontella mobiliensis and Coscinodiscus centralis were 0.31 ± 0.