7-19 



I 





OPEN SYMBOLS REPRESENT SPECIES ABSENCE 

 CLOSED SYMBOL REPRESENTS SPECIES 

 Q COLLECTED IN LOW DENSITIES 



00 



00 



CD 



o 



>- 



I— 



I — \ 



00 



LU 

 Q 



lOOn 



L-imulus polyphemus 



*EGGS COLLECTED IN SAMPLES 



ADO ADO ADO* ^DO ADO A«0 ADO 



300 



200 



1971 



1972 



1973 1974 1975 

 OCTOBER 



1976 1977 



Figure 7-4. Population densities of dominant arthropods, Balanus 

 improvisus and Limulus polyphemus by station at 

 intertidal areas in New Haven Harbor, 1971 through 

 1977. New Haven Harbor Ecological Studies 

 Summary Report, 1979.. 



