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Images of herring sperm motility patterns visualized by using darkfield optics and recorded with NIH IMAGE after frame averaging (8 frames per sec) through a DSP 200 image enhancement system (Dage-MTI). (A) Sperm in 1/2 FSW were immotile as indicated by discrete foci. (B) Sperm in 1/2 NaF exhibited a linear trajectory as indicated by straight lines. (C) Sperm in 1/2 FSW containing SMIF exhibited a circular pattern of motility.
