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28 May 2004 Diode laser diagnostics of heart and eye movements of Daphnia crawfish
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Abstract
The method based on autodyne effect of detection in the semiconductor laser is offered for registration of heart and eye movements of fresh-water crawfish-Daphnia. With the help of laser autodyne system amplitude and the shape of Daphnia's heartbeats which used to determine the degree of toxicity of the water environment has been registered. In this work the dependence of frequency and amplitude of heartbeats of Daphnia from a degree of toxicity of the water environment has been presented. Oscillograms of movements of Daphnia's eye and their spectrums have been received both for a case of own movements of an eye, and for occurrence of the phenomenon of synchronization of these movements by an external electric field. Occurrence of the phenomenon of synchronization at which character of movement of an eye becomes close to harmonious has been shown. We show the research results of influence of a magnetic field on Daphnia, placed in the water environment. It is shown, that at frequencies close to Daphnia's heartbeat frequency the frequency of its heartbeat substantially increases. We also discovered great increase in heartbeat frequency of a Daphnia placed in water that was preliminary influenced with a magnetic field. It can be understood as a "magnetization" of water. Under the influence of magnetic field of higher frequency the "magnetization" effect disappears.
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Dmitry Alexandrovich Usanov, Anatoli Vladimirovich Skripal, and Andrey Dmitrievich Usanov "Diode laser diagnostics of heart and eye movements of Daphnia crawfish", Proc. SPIE 5330, Complex Dynamics, Fluctuations, Chaos, and Fractals in Biomedical Photonics, (28 May 2004); https://doi.org/10.1117/12.539178
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