Abstract
The eggs of rainbow smelt were incubated at pH c. 4.5, c. 5.5 and control (c. 6.8) for durations of 2–14 days to assess their vulnerability to acid precipitation. These eggs are likely to be exposed to marked pH depressions during their incubation in small streams owing to run‐off from snow melt and spring rains. Survival after 48 h exposure was not related to pH, although longer exposure to low pH significantly decreased survival. The developmental stage at initial exposure was also important in determining survival. Overall egg survival varied from 0–87% at pH c. 4.5,0–89% at pH c. 5.5, and 44–100% at control pH levels, (c. 6.8).
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