CONTENTS 



Fan 



Techniques 167 



Recording the activity of oysters 167 



Collecting water samples — 168 



Characteristics of carbohydrates 168 



Stability 168 



Effects of filtering and centrifuging 168 



Variations in carbohydrate concentrations in standing sea water 169 



Relation of carbohydrate concentration to salinity 169 



Diurnal variation - 171 



The oyster's response to carbohydrates 173 



Analysis of shell movements 173 



Effect of carbohydrates on pumping rate 174 



Assimilation of carbohydrates 177 



Anomalous responses 179 



Summary 181 



Literature cited 182 



Appendix 182 



Estimating carbohydrates in sea water 182 



Measuring oyster activity 183 



Description of sampling device 183 



