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polycarbonate tank
Laboratory Experiment of Stable Isotope
The rearing experiment was conducted at the Ocean Research Center
of Fukui Prefectural University in May 1999. A total of 228 juveniles
(average TL of 47.5 mm) to which formula feed had been fed for
two weeks were divided into two groups on 16 May 1999. Seventy-eight
individuals were transferred to 30-L polycarbonate tank and reared
by the same formula feed (control group). The remaining 150 individuals
were reared by live mysids (Archaeomysis sp.) in 200-L polyethylene
tank for 2 weeks (experiment group). Mysids were caught in Obase
Beach Wakasa Bay twice a week and preserved in a 500-L polycarbonate
tank. Enough live mysids were added to the tank every day as the
juveniles could prey on them ad libitum. Five individuals from
the 30-L tank were sampled at 6 and 13 d after the beginning of
the experiments and 5 individuals from the 200-L tank were randomly
collected every two days during the experiment.
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