3ai s no sainsdvo on / an no sdinsdvo 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 
