376 



American Fisheries Society 



5-10 10-15 15-20 20-25 25-30 30-35 35-40 40-50 50-60 60-70 70-80 

 mm. mm. mm. mm. mm. mm. mm. mm. mm. mm. mm. 



Key to Graph. 



Cladocera 



Copepoda 



Midge larvae and pupre 



Amphipoda 



Corixa nymphs and adults 



Fish remains 



**««^fl0«*V 



