Table 1. Mean selectivity index for larval striped bass from the Potomac 

 Estuary, 1978 (from Beaven and Mihursky 1979). 



Available zooplankton 



No. of samples from which 

 mean index is calculated 



Larval Stage 

 Yolk sac Finfold Postfinfold 



Copepoda 



Eurytemora af finis adults 

 E. af finis copepodites 

 E. af finis nauplii 

 Cyclopoid adults 

 Cyclopoid copepodites 

 Unidentified nauplii 



Cladocera 



Bosmina longirostris 

 Daphnia species 

 Chydorus species 



Rotif era 



Brachinous calycif lorus 

 Brachinous species 

 Keratella species 

 Filinia longiseta 

 Asplanchna species 

 Polyarthra species 

 Unidentified rotifer 



156 



