The Data Acquisition And Processing Of Fish Behavior In Water Quality Monitoring And The Construction Of Rhythm Model

The change of water quality is related to all aspects of national livelihood.From industrial and agricultural production to drinking water for residents,water quality safety can be regarded as the most necessary guarantee for all production and human being.At the same time,China is a unique country which with limited fresh water resources,uneven regional distribution and limited water resources for per person.It is a top priority to ensure water quality safety in a timely and stable manner with a assumable oscillation.Therefore,the monitoring of water quality shall be paid more attention,and almost all countries had carried out some relevant works.The purpose of water quality monitoring is to provide reference for the changes of water quality,and to provide the guidance for subsequent water quality assurance work.There are two types of water quality monitoring,one of them mains that sampling in the natural water environment,and then do some physical and chemical analysis of various water quality indicators in the laboratory,and draw a conclusion of the final water quality inspection;the another type is to provide the rapid real-time monitoring of natural water bodies in a dynamic environment on-site,the water quality accidents happen in sudden,what's more,the drinking water is a continuous process,so the earlier of detection work in water quality when an emergency occurs,the more convenient to take relevant measures at the first time and strive to minimize losses.The main basis of the current water quality monitoring was analyzed,the applicable occasions,advantages and disadvantages of various technical means were compared.The experimental equipment was selected from the online water quality monitoring instrument developed by the Ecological Environment Center of the Chinese Academy of Sciences.The instrument can obtain the behavioral data of some aquatic organisms.Under the normal water environment,the swimming behavior of zebrafish exhibits regular rhythm.The behavior of zebrafish individuals under environmental stress by toxic substances presents rhythm disorder obviously,so behavioral research which can be used as an early warning target for water quality analysis and subsequent aquatic organisms research work provides an intuitive expression.Biological rhythm is a complex and regular activity that exists in different biological levels.From single-cell eukaryotes to higher mammals,biological rhythms regulate life activities from different views,reflecting a high degree of synchronization with circadian rhythms.The rhythm feature is a combination of various vital signs and factors.It is a positive adaptation to environmental changes during the process of biological evolution,and regular,time-sharing,and moderate adjustment of the strength of vital signs.In zebrafish behavioral experimental data,the model's goodness of fit is between 60% and 85%.In biorhythmic studies,rhythmic behavioral research is the most intuitive and effective way to observe and record an individual's response to environmental stress.In view of the advantages of using mathematical models in rhythmic behavior analysis,this paper analyzes the classic models firstly,Goodwin and Goldbeter,and discusses the rhythm research that exhibits damped oscillations.Based on experimental and statistical behavioral data,the key steps in establishing a model is the correspondence between numerical changes in model variables and individual behaviors in a stressful environment.Parameters in the model are used to assess changes in the water environment.The zebrafish population showed a regular rhythm in a low-concentration toxic environment.The experimental drug selected for a continuous 6-day experiment with the surface water concentration is cadmium chloride,atrazine and disodium hydrogen phosphate.Based on our previous research,we analyzed and explored the key factors of the model establishment process from the three perspectives carefully,water body,human factors and monitored aquatic organisms.By the zebrafish swimming behavior rhythm,an ordinary differential equation is established by assuming that the zebrafish's behavioral intensity is proportional to the swimming speed.Then,the experiment data is fitted by the analytical equation of the differential equation,and finally a series of parameters are obtained to guide the evaluation of the water body and the improvement of the water quality in the later stage.For biological toxicology studies,whether the physiological toxicity caused by environmental stress is irreversible under the internal steady state mechanism is the focus of research on the downward trend of rhythm data.After reading a lot of rhythm expressions in the form of damped oscillations reflected in the current research,we analyzed them with our model and obtained good results,the model's goodness of fit for rhythm data ranges from 85% to 95%.At the same time,the expression of the behavioral experiment of zebrafish under environmental pressure at the rhythm level plays a significant role in the field of water quality assessment based on its oscillation form.Finally,this research paper will provide a reference for the establishment of mathematical rhythm models for more complex organisms,highlighting the importance of founding the factors which influence rhythmic intensity expression.In subsequent studies,the model can be applied to quantitative control and oscillation adjustment of biological rhythms through modification and expansion in a special theoretical context,and different factors can get a accurate controlled independently at all biological levels.