4. Conclusions
The present findings confirm that blood glucose levels in
fish can be rapidly and conveniently measured using the sensor.
Since the sensor was housed in a needle-type hollow container,
blood glucose level could be measured without causing enzyme
detachment from the sensor. Even when sensor response was
unstable, subsequent measurements could be taken because the
immobilized enzyme membrane in the hollow container could
be easily exchanged. Furthermore, as the sensor, spectrometer
and personal computer are small, this test system is easily transportable
for use at fish farms. However, the reproducibility of
measurements can be reduced if the sensor is inserted in different
manners, and if the fish does not stay still, sensor response is
unstable. Future improvements should address these problems
and result in the development of a practical sensor system.