Differences in the behavior characteristics between Daphnia magna andJapanese madaka in an on-line biomonitoring system
Zongming Ren , Zijian Wang
DOI:
Received July 09, 2009,Revised August 31, 2009, Accepted , Available online
Volume 22,2010,Pages 703-708
- Summary
- References
- Related Articles
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.
