suggested that the ability of shrimp larva to
catch their prey in light was stronger than that in dark. The rate of
feeding in M. rsenbergii larva was accelerated with the increasing
light intensities from 0 to 100 lx, but did not significantly vary when
the light intensity was above 100 lx (Lin, 1998). In this experiment,
all the light intensities were above 100 lx, so we deemed that the
feeding of shrimps was not affected by the different light intensities.
This conjecture was identical with the results of experiment by
Wang et al. (2003). The difference of FId in our paper may be caused
by the different mode of light intensity fluctuation. The shrimps living
in their natural habitat experience different light intensities and they
should have a better ecological adaptation mechanism for the rhythmic
fluctuation of the environmental factors. Maybe the fluctuating
environment was better for their feeding. So the FId in treatments
FL1-3 was higher than CL. The fluctuation of 1200 lx at every 84 s
may be more abrupt and press the shrimps in FL4, which had a
lower value of the FId.