OJ 



CO 



UJ 



I- 

 < 



03 



!L' O) 



— in 



3ais NO sannsdvo on / an no sannsdvo on 



Figure 11-6. Influence of No. 2 fuel oil on egg capsule 

 deposition behavior of N. obsoletus, 1977. 



NOTE: Exposures initiated 10/22/76. Open circles represent data from con- 

 trol snails, closed circles represent data from snails held at "0.1" ppm. Mean 

 oil hydrocarbon concentration at "0.1" ppm ± s.d. (N) was 0.077 ppm ±0.026 

 (34). Arrows indicate reversal of treatments. 



147 



