<span style="font-size:14.0pt;line-height: 115%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; color:black;mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language: HI" lang="EN-IN">Tolerance and respiration of a fouling dreissinid bivalve <i>Mytilopsis sallei </i>(Recluz) (Pelecypoda: Dreissinidae) exposed to chromium at different salinities</span>

Abstract

<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">Chromium tolerance and metabolic rate in <i>Mytilopsis sallei, </i>a fouling bivalve which inhabits Visakhapatnam harbour were studied at different salinities such as 10, 15, 25, 32 and 35%o<i>. </i>The LC₅₀ values were found to increase with increasing salinities indicating a decrease in toxicity. However, low salinities did not affect the toxicity of chromium. The metabolic rate of the control animals (without toxicant exposure) showed an increasing trend up to 32%<i style="mso-bidi-font-style:normal">o</i> followed by a decrease at 35%o.<i> </i>In general, different concentrations of chromium (1.9 to 14.4 ppm) inhibited the metabolic rate at all salinities studied.</span>