Differences in the behavior characteristics between Daphnia magna and
Japanese madaka in an on-line biomonitoring system |
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Authors: | Zongming Ren and Zijian Wang |
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Institution: | 1. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences, Belting 100085, China 2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences, Belting 100085, China |
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Abstract: | It is important to select suitable organisms to adapt the requirement of di erent environment monitoring purposes. Following our
previous study, the behavioral responses of Daphnia magna and Japanese madaka (Oryzias latipes) were investigated and compared
under flow-through conditions in an on-line biomonitoring system. The results showed that both D. magna and Japanese madaka had
similar biological clock, but the circadian rhythms of Japanese madaka was more clearly recorded than that of D. magna. And the
sensitivity of D. magna was about two orders of magnitudes higher than that of Japanese madaka in di erent types of toxic chemicals
(dichlorovos, deltamethrin and cadmium chloride). However, when both animals were used in an on-line biomonitoring system, the life
span of D. magna was less than 7 days and Japanese madaka could last for more than one month without feeding. Therefore, D. magna
was proposed to be a more sensitive bioindicator and was suitable for short term monitoring the pollution events at concentration level
closing to the water quality standard, while Japanese madaka was more suitable for the long-term monitoring for accidental discharges. |
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Keywords: | Daphnia magna Japanese madaka on-line biomonitoring behavioral responses |
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