CONTENTS 



Page 



Introduction 1 



Methods and materials 2 



Trough specifications and water supply 2 



Feeding 2 



Sampling 3 



Scale analysis 3 



Results 4 



Marking success 4 



Mortality 5 



Growth 5 



Discussion 9 



Conclusions 10 



Summary 11 



Acknowledgment 12 



Literature cited 12 



ill 



