Medaka fish can be easily spotted in gutters, ponds and marshlands in eastern China. The fish, small and slender with a maximum height of 40 millimeters, is able to make great contributions to monitoring water quality, thanks to its sensitiveness to changes in the living environment.
Wuxi Jingyiqiao Automatic Water Quality Monitoring Station installed a water quality biological alerting system in March, the first one of its kind in Jiangsu province.
The monitoring set consists of eight tanks containing water from the Liangxi River and each tank contains three to five medaka fish. The vitality state of the fish has proven to be relative to the water quality.
The process of monitoring water quality has many factors and including analyzing levels of permanganate, nitrogen, phosphorus, and eutrophication. The system is able to clearly show the impact of such factors on creatures, according to Du Yuanxin, head of the Jingyiqiao Automatic Water Quality Monitoring Station.
If there are any abnormal factors, the Wuxi municipal environmental protection bureau will instantly conduct an emergency response, Du added.
A water quality monitoring machine in Wuxi’s Liangxi River [Photo/Xinhua]
Medaka fish held in eight tanks containing water from the Liangxi River help to interpret water conditions in real time. [Photo/Xinhua]