Some biosensor systems which can make real-time monitoring of fish stress (glucose levels as the stress indicator) were developed in our laboratory. However, since these systems use a button battery as the power source, it requires regular battery replacement, which leaves some problems such as unnecessary handling stress on the fish and hindrance to continuous measurement due to interruption of measurement. In this study, we tried to develop a novel biosensor system that integrated the sensor (glucose biosensor) and power source (biofuel cell) to achieve a "Barrier-free Measurement" without battery replacement.
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