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Fig. 9. Exposure to CE and aerial respiratory behaviour. The mean (±s.e.m.)
number of pneumostome openings (A), total breathing time (B) and mean
breathing time (C) of snails in each of the three water treatments. (A) Number
of pneumostome openings in PW compared with that in CE and BC. The number for
CE is significantly higher (*P<0.01, N=65)
than that for either PW or BC, which were not significantly different from
each other. (B) The total breathing time in PW, CE and BC (N=65).
Again, CE results were significantly higher (**P<0.001)
than those for either PW or BC, which were not significantly different from
each other. (C) The mean breathing time was not significantly different in any
of the groups (from Orr et al.,
2007).
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