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 IOA News Letters Summary

by
Sha Miao
National Taiwan Ocean University
R.O.C.

A 40-day study evaluating the effect of thermal amplitude on daily growth rate of Chinese shrimp was conducted.  The results indicated that the growth rate was a quadratic function of the thermal amplitude.  The optimal thermal amplitude was estimated to be 2.39¢XC.  That is, the maximum daily growth rate would be at daily temperatures fluctuating between 31¢XC +/- 1.195¢XC.  Another 120-day study evaluating the simultaneous effects of thermal amplitude and stocking density on daily growth rate of redtail shrimp was also conducted.  The results indicated that the growth rate from period to period was a quadratic function of the studied factors.   The optimal thermal amplitude and stocking density changed periodically throughout the 120-day experiment.