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Figure 2


Fig. 2. (A) Straight line velocity (µm s–1 VSL) and (B) beat cross frequency (Hz; BCF) responses of boar spermatozoa to the addition of 15 mmol l–1 bicarbonate/CO2. Data are means (± s.e.m.) calculated from treatment means for eight individual boars. The points at 22 min represent the NaCl-control samples, which had not been exposed to bicarbonate/CO2. ***Bicarbonate/CO2 vs no bicarbonate/CO2 planned contrasts; VSL effect (F1,87=61.9), P<0.001 and BCF effect (F1,87=49.9), P<0.001. Changes in mean frequencies (± s.e.m. from eight individual boars) of group 1 (fast and linear) spermatozoa plotted against the time elapsed after bicarbonate/CO2 addition. Points at 22 min represent the NaCl-control samples. (C,D) The difference between the absence and presence of sAPM, respectively.





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