Metabolic rates in relation to ionic changes 



Metabolic rates of shrimp tested in the different deviated ion 

 media are compared by test temperature in Fig. 126. The oxygen con- 

 sumption levels of shrimp tested in 0% Mg at 25°C were similar to the 

 control level (15°/ooS and 25°C). The respiratory levels in media 

 with 25-6 Ca and 30% K were alike at 25°C; but these levels were 

 higher than in the control. 



The metabolic rates in 25% Ca were consistently high in all test 

 temperatures; but the oxygen consumption in 0% Mg and 40% K exhibited 

 an opposite trend in relation to temperature changes. For instance, 

 the oxygen consumption level in 0% Mg medium was higher than in 40% K 

 at 18°C. This trend was reversed at 32°C with the result that the 

 oxygen consumption in 40% K was higher than in 0% Mg. The shrimp in 

 25% Ca and 0% Mg experienced a total mortality in 32 °C within ten 

 hours . 



275 



