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. 2016 Feb 19;11(2):e0149678. doi: 10.1371/journal.pone.0149678

Fig 3. Proportions of emerged cercariae of Trichobilharzia szidati from Lymnaea stagnalis during two-hour interval.

Fig 3

Plots showing the emerged cercariae for each day as averaged proportions of the total numbers emerged within 24 hours across all replicate snails. Grey areas indicate dark periods of the day. (A) The “peak emission experiment” (PJ-L) in July under laboratory conditions at room temperature (19.6°C-20.4°C) and natural photoperiod regime (light dark cycle of 16:8 h) with highest cercarial emission corresponding to sunrise at 5:30. (B) The “peak emission experiment” (PJ-C) in July under standard thermal conditions in a climate chamber (20°C) and light dark cycle of 12:12 h showing high cercarial emission after onset of illumination at 6:00. (C) The “peak emission experiment” (PS-C) in September under standard thermal conditions in a climate chamber (20°C) and light dark cycle of 12:12 h showing high emission rates after the onset of illumination at 8:00 but high variability in the emergence patterns during a day.