Regulation of sperm motility in Eastern oyster (Crassostrea virginica) spawning naturally in seawater with low salinity
Fig 2
Effect of salinity on sperm velocity (μm/s, A) in Eastern oyster, Crassostrea virginica. Sperm motility was activated in high salinity seawater diluted to salinities of 4 to 32 PSU. Average velocity at each salinity (B) and time post-activation (C) is displayed. D shows a second-order polynomial regression for the effects of salinity on sperm velocity at 15 min post-activation. Data were analyzed using a repeated measures ANOVA and shown as mean ± SE (n = 5). Treatments with different superscripts significantly differ (p < 0.05). A velocity of 0 μm/s was indicated by asterisk.