Effects of bleached kraft mill effluents on the swimming activity of Monoporeia affinis (crustacea, amphipoda) lindström |
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Authors: | Harri Kankaanp Marjo Laurn Madeleine Mattson Magnus Lindstrm |
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Institution: | Harri Kankaanpää, Marjo Laurén, Madeleine Mattson,Magnus Lindström |
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Abstract: | The crustacean Monoporeia affinis Lindström was exposed to two different concentrations of bleached kraft mill effluent (BKME) containing, originally, 8.3 mg/g organic chlorine determined as adsorbable organic halogen (AOX). The swimming activity of the animals was recorded by pairs of infra-red sensitive photocells attached to 5.6 1 aquaria having a seawater inflow rate of 12 ml/min. The test sequence included a control phase, an exposure phase and a recovery phase. During the exposure phase the total swimming activity decreased in three of the four test aquaria containing effluent, indicating that the animals had retreated into the sediment. Total activity increased during the recovery phase and, in the case of the lower organic chlorine concentration, activity almost achieved the original control-phase level. Statistical differences in swimming activity changes during experiment were evaluated using ANOVA. Experimental methods are explained in detail. |
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Keywords: | Activity recording amphipod adsorbable organic halogen bleached kraft mill effluent extractable organic halogen monoporeia affinis pulp industry |
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