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Biology of Reproduction, Vol 10, 78-84, Copyright © 1974 by Society for the Study of Reproduction

Observations on Bull Sperm Rotation

ALLEN DEAN DRAKE 1

1 Division of Engineering and Applied Physics, Harvard University, Cambridge, Massachusetts 02138


Three sets of cinematographic observations are described which attempt to ascertain both whether bull sperm roll, as opposed to rock, and in what direction such rocking or rolling occurs. The first set utilizes the flash shape sequence of the spermatozoan head, the second involves sequential views of asymmetric heads, and the third has to do with the flash color sequence of the head. It is concluded that bull sperm roll and that they roll both left- and right-handedly.

Accepted on June 25, 1973






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Copyright © 1974 by the Society for the Study of Reproduction.