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We used an artificial semen emission test to examine the semen transporting role of parasperm (unflagellated sperm), which are produced along with eusperm (normal sperm) by an incomplete meiosis in the marine sculpin Hemilepidotus gilberti. After separation of contents of semen (eusperm, parasperm, and seminal plasma) by centrifugation, the distance traveled by semen discharged vertically from a syringe...
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