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Figure 3


Fig. 3. (A) Number of approaches by snappers to <50 cm from the experimental shelter during the ammonia and urea treatments, separated into 10-min intervals. There were no significant differences among time intervals for either odorant with repeated measures ANOVA. (B) Ammonia concentration (mean ± s.e.m., N=10) from the calibration of the odorant delivery system. 33 mmol N l-1 NH4Cl was delivered for 30 min (1.67 ml min-1) followed by ambient seawater. The shelter's internal ammonia concentration (after mixing) was sampled via the access port.





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